/* ==========================================================================
   MasterFlow Design System - Vanilla CSS
   Theme: Mastery Focus Studio (Obsidian Dark Mode)
   ========================================================================== */

:root {
    /* Background & Surface Colors */
    --bg-dark: #0B0D12;
    --surface-card: #141720;
    --surface-elevated: #1E2230;
    --surface-glass: rgba(20, 23, 32, 0.75);
    --card-border: rgba(255, 255, 255, 0.08);
    --card-border-hover: rgba(255, 255, 255, 0.18);

    /* Primary Brand Colors (The Flow Accent) */
    --primary: #3B82F6;
    --primary-hover: #2563EB;
    --primary-glow: rgba(59, 130, 246, 0.28);
    --primary-light: rgba(59, 130, 246, 0.12);

    /* Functional Accents */
    --waveform-active: #10B981; /* A-B Loop Active Emerald */
    --waveform-active-glow: rgba(16, 185, 129, 0.35);
    --waveform-inactive: rgba(255, 255, 255, 0.16);
    --marker-warning: #F59E0B;
    --marker-light: rgba(245, 158, 11, 0.15);
    --success: #10B981;

    /* Typography Colors */
    --text-main: #FFFFFF;
    --text-muted: #94A3B8;
    --text-disabled: #475569;

    /* Typography Families */
    --font-heading: 'Outfit', 'Pretendard', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: 'Pretendard', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

    /* Layout Transitions */
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Base & Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    position: relative;
    overflow-x: hidden;
    min-height: 100vh;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-dark);
}
::-webkit-scrollbar-thumb {
    background: var(--surface-elevated);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

/* Utility & Container */
.container {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 24px;
}

.desktop-break { display: inline; }
.mobile-break { display: none; }

@media (max-width: 767px) {
    .desktop-break { display: none; }
    .mobile-break { display: inline; }
}

/* Typography Helpers */
.gradient-text {
    background: linear-gradient(135deg, #60A5FA 0%, #A855F7 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.gradient-text-warn {
    background: linear-gradient(135deg, #F87171 0%, #FBBF24 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.text-primary { color: var(--primary); }
.text-success { color: var(--success); }
.text-muted { color: var(--text-muted); }
.text-white { color: var(--text-main); }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.font-bold { font-weight: 700; }

/* Ambient Background Glows */
.ambient-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(140px);
    pointer-events: none;
    z-index: 0;
    opacity: 0.45;
}
.glow-1 {
    top: -150px;
    left: 15%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.3) 0%, transparent 70%);
}
.glow-2 {
    top: 600px;
    right: 5%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(168, 85, 247, 0.25) 0%, transparent 70%);
}
.glow-3 {
    top: 2200px;
    left: 10%;
    width: 700px;
    height: 700px;
    background: radial-gradient(circle, rgba(16, 185, 129, 0.2) 0%, transparent 70%);
}

/* ==========================================================================
   1. Navbar (Header)
   ========================================================================== */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(11, 13, 18, 0.82);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--card-border);
    transition: var(--transition);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1240px;
    margin: 0 auto;
    padding: 16px 24px;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}



.logo-text {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-main);
    letter-spacing: -0.02em;
}
.logo-accent {
    color: var(--primary);
}
.logo-badge {
    background: var(--primary-light);
    color: var(--primary);
    border: 1px solid rgba(59, 130, 246, 0.3);
    padding: 2px 8px;
    border-radius: 6px;
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.nav-links {
    display: flex;
    gap: 32px;
}
.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
}
.nav-links a:hover {
    color: var(--text-main);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Buttons */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-hover) 100%);
    color: #FFFFFF;
    text-decoration: none;
    padding: 10px 20px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.95rem;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 15px var(--primary-glow);
    transition: var(--transition);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.45);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: var(--surface-card);
    color: var(--text-main);
    text-decoration: none;
    padding: 10px 20px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.95rem;
    border: 1px solid var(--card-border);
    cursor: pointer;
    transition: var(--transition);
}
.btn-secondary:hover {
    background: var(--surface-elevated);
    border-color: var(--card-border-hover);
    transform: translateY(-2px);
}

.btn-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--text-main);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 10px;
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
}
.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.05);
}

.btn-lg {
    padding: 14px 28px;
    font-size: 1.05rem;
    border-radius: 14px;
}
.btn-xl {
    padding: 16px 36px;
    font-size: 1.15rem;
    border-radius: 16px;
}
.btn-full {
    width: 100%;
}

.icon-sm { width: 16px; height: 16px; }
.icon-md { width: 18px; height: 18px; }
.icon-lg { width: 24px; height: 24px; }

/* Mobile Menu */
.mobile-menu-btn {
    display: none;
    background: transparent;
    border: none;
    color: var(--text-main);
    cursor: pointer;
    padding: 6px;
}
.mobile-nav {
    display: none;
    flex-direction: column;
    padding: 20px 24px;
    background: var(--surface-card);
    border-top: 1px solid var(--card-border);
}
.mobile-nav.open {
    display: flex;
}
.mobile-link {
    color: var(--text-muted);
    text-decoration: none;
    padding: 12px 0;
    font-weight: 500;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}
.mobile-link:hover { color: var(--text-main); }
.mobile-cta-group {
    margin-top: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

@media (max-width: 992px) {
    .nav-links { display: none; }
    .btn-ghost { display: none; }
    .mobile-menu-btn { display: flex; }
}

/* ==========================================================================
   2. Hero Section
   ========================================================================== */
.hero-section {
    position: relative;
    padding: 80px 0 100px;
    z-index: 1;
}

.hero-content {
    text-align: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--surface-card);
    border: 1px solid var(--card-border);
    padding: 6px 16px;
    border-radius: 30px;
    margin-bottom: 24px;
    backdrop-filter: blur(10px);
}
.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--primary);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--primary);
}
.badge-text {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
}

.hero-title {
    font-family: var(--font-heading);
    font-size: clamp(2.5rem, 5.5vw, 4.5rem);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.03em;
    margin-bottom: 24px;
}

.hero-subtitle {
    font-size: clamp(1.05rem, 1.8vw, 1.25rem);
    color: var(--text-muted);
    max-width: 800px;
    margin: 0 auto 40px;
    line-height: 1.7;
}

.hero-cta-group {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.device-support {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-bottom: 64px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    flex-wrap: wrap;
}

.device-support span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 11px;
    border: 1px solid var(--card-border);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.025);
}

.device-support span svg {
    width: 15px;
    height: 15px;
    color: var(--primary-light);
}

.device-support strong {
    margin-left: 4px;
    color: var(--text-primary);
    font-weight: 600;
}

/* Interactive Hero Mockup */
.mockup-container {
    background: var(--surface-card);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(255, 255, 255, 0.05);
    text-align: left;
    margin-top: 20px;
    animation: floatUp 1s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes floatUp {
    from { opacity: 0; transform: translateY(40px); }
    to { opacity: 1; transform: translateY(0); }
}

.mockup-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(0, 0, 0, 0.4);
    padding: 14px 20px;
    border-bottom: 1px solid var(--card-border);
}
.mockup-dots {
    display: flex;
    gap: 8px;
}
.dot { width: 12px; height: 12px; border-radius: 50%; }
.dot-red { background: #FF5F56; }
.dot-yellow { background: #FFBD2E; }
.dot-green { background: #27C93F; }

.mockup-title {
    font-family: var(--font-heading);
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-muted);
}
.mockup-status {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.78rem;
    color: var(--success);
    font-weight: 600;
}
.status-indicator {
    width: 6px;
    height: 6px;
    background: var(--success);
    border-radius: 50%;
    animation: pulse 2s infinite;
}
@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.3); }
}

.mockup-body {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    min-height: 480px;
}

@media (max-width: 1024px) {
    .mockup-body { grid-template-columns: 1fr; }
}

/* Left Panel: Waveform & Player */
.mockup-player-panel {
    padding: 24px;
    border-right: 1px solid var(--card-border);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 24px;
}

.player-top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}
.asset-info {
    display: flex;
    align-items: center;
    gap: 14px;
}
.asset-thumb {
    width: 48px;
    height: 48px;
    background: var(--primary-light);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(59, 130, 246, 0.2);
}
.asset-title {
    font-weight: 700;
    font-size: 1rem;
    color: var(--text-main);
}
.asset-meta {
    font-size: 0.82rem;
    color: var(--text-muted);
}

.loop-status-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(16, 185, 129, 0.15);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: var(--waveform-active);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 700;
}

/* Waveform Canvas Area */
.waveform-box {
    background: #0E1017;
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 20px;
    position: relative;
    overflow: hidden;
}
.time-rulers {
    display: flex;
    justify-content: space-between;
    font-family: var(--font-heading);
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.waveform-canvas {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 140px;
    gap: 4px;
    position: relative;
}

.wave-group {
    display: flex;
    align-items: center;
    gap: 4px;
    height: 100%;
}

.bar {
    width: 5px;
    border-radius: 4px;
    background: var(--waveform-inactive);
    transition: height 0.3s ease;
}
.h-20 { height: 20%; }
.h-25 { height: 25%; }
.h-30 { height: 30%; }
.h-35 { height: 35%; }
.h-40 { height: 40%; }
.h-45 { height: 45%; }
.h-50 { height: 50%; }
.h-55 { height: 55%; }
.h-60 { height: 60%; }
.h-65 { height: 65%; }
.h-70 { height: 70%; }
.h-75 { height: 75%; }
.h-80 { height: 80%; }
.h-85 { height: 85%; }
.h-90 { height: 90%; }
.h-95 { height: 95%; }
.h-100 { height: 100%; }

/* Loop Active Region */
.wave-loop-region {
    display: flex;
    align-items: center;
    gap: 4px;
    height: 100%;
    padding: 0 10px;
    background: rgba(16, 185, 129, 0.08);
    border-top: 2px solid var(--waveform-active);
    border-bottom: 2px solid var(--waveform-active);
    position: relative;
}
.wave-loop-region .bar {
    background: linear-gradient(180deg, #34D399 0%, #10B981 100%);
    box-shadow: 0 0 8px var(--waveform-active-glow);
}

.loop-handle {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--waveform-active);
    z-index: 10;
}
.loop-a { left: 0; }
.loop-b { right: 0; }

.handle-tag {
    position: absolute;
    top: -24px;
    left: -50%;
    transform: translateX(-50%);
    background: var(--waveform-active);
    color: #000;
    font-size: 0.68rem;
    font-weight: 800;
    padding: 2px 6px;
    border-radius: 4px;
    white-space: nowrap;
}

.playhead {
    position: absolute;
    left: 45%;
    top: 0;
    bottom: 0;
    z-index: 20;
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: left 0.2s linear;
}
.playhead-line {
    width: 2px;
    height: 100%;
    background: #FF5F56;
    box-shadow: 0 0 10px #FF5F56;
}
.playhead-tag {
    background: #FF5F56;
    color: #FFF;
    font-family: var(--font-heading);
    font-size: 0.72rem;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 4px;
    margin-top: 4px;
}

/* Player Control Bar */
.player-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--surface-elevated);
    padding: 16px 20px;
    border-radius: 16px;
    border: 1px solid var(--card-border);
    flex-wrap: wrap;
    gap: 16px;
}

.control-group-left {
    display: flex;
    align-items: center;
    gap: 12px;
}
.btn-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: var(--surface-card);
    border: 1px solid var(--card-border);
    color: var(--text-main);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}
.btn-icon:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--primary);
}

.btn-play-pause {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--primary);
    border: none;
    color: #FFF;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 0 15px var(--primary-glow);
    transition: var(--transition);
}
.btn-play-pause:hover {
    transform: scale(1.06);
    background: var(--primary-hover);
}

.control-group-center {
    display: flex;
    align-items: center;
}
.speed-selector {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.speed-label {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-muted);
}
.speed-buttons {
    display: flex;
    background: var(--surface-card);
    padding: 4px;
    border-radius: 10px;
    border: 1px solid var(--card-border);
    gap: 4px;
}
.btn-speed {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-family: var(--font-heading);
    font-size: 0.82rem;
    font-weight: 700;
    padding: 6px 10px;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
}
.btn-speed.active {
    background: var(--primary);
    color: #FFF;
    box-shadow: 0 2px 8px var(--primary-glow);
}
.btn-speed:hover:not(.active) {
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.05);
}

.control-group-right {
    display: flex;
    align-items: center;
}
.loop-counter {
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--surface-card);
    padding: 8px 14px;
    border-radius: 12px;
    border: 1px solid var(--card-border);
}
.counter-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 600;
}
.counter-value {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.1rem;
    color: var(--text-main);
}
.counter-total {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
}
.btn-counter-add {
    background: rgba(16, 185, 129, 0.2);
    color: var(--waveform-active);
    border: 1px solid rgba(16, 185, 129, 0.4);
    padding: 6px 10px;
    border-radius: 8px;
    font-size: 0.78rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
}
.btn-counter-add:hover {
    background: var(--waveform-active);
    color: #000;
}

/* Right Panel: Notes & Sync */
.mockup-notes-panel {
    background: #11141D;
    padding: 24px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 20px;
}

.panel-tab-header {
    display: flex;
    gap: 8px;
    border-bottom: 1px solid var(--card-border);
    padding-bottom: 12px;
}
.tab-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 600;
    padding: 8px 12px;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
}
.tab-btn.active {
    background: var(--surface-elevated);
    color: var(--text-main);
    border: 1px solid var(--card-border);
}

.notes-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    flex-grow: 1;
    max-height: 320px;
    overflow-y: auto;
    padding-right: 4px;
}

.note-item {
    background: var(--surface-card);
    border: 1px solid var(--card-border);
    border-radius: 14px;
    padding: 14px;
    transition: var(--transition);
}
.note-item.active-note {
    border-color: var(--primary);
    background: rgba(59, 130, 246, 0.08);
}
.note-time-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: var(--primary-light);
    color: var(--primary);
    font-family: var(--font-heading);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 8px;
    border-radius: 6px;
    margin-bottom: 8px;
}
.warning-badge {
    background: var(--marker-light);
    color: var(--marker-warning);
}
.note-content strong {
    display: block;
    font-size: 0.92rem;
    color: var(--text-main);
    margin-bottom: 4px;
}
.note-content p {
    font-size: 0.84rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.note-add-box {
    display: flex;
    gap: 8px;
    margin-top: 8px;
}
.note-add-box input {
    flex-grow: 1;
    background: var(--surface-card);
    border: 1px solid var(--card-border);
    border-radius: 10px;
    padding: 8px 12px;
    color: var(--text-main);
    font-size: 0.85rem;
    outline: none;
}
.note-add-box input:focus {
    border-color: var(--primary);
}
.btn-add-note {
    background: var(--primary);
    color: #FFF;
    border: none;
    border-radius: 10px;
    padding: 8px 16px;
    font-weight: 600;
    font-size: 0.85rem;
    cursor: pointer;
}

.save-status-footer {
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(16, 185, 129, 0.08);
    border: 1px solid rgba(16, 185, 129, 0.25);
    padding: 12px 16px;
    border-radius: 12px;
}
.status-title {
    font-weight: 700;
    font-size: 0.88rem;
    color: var(--success);
}
.status-sub {
    font-size: 0.78rem;
    color: var(--text-muted);
}

/* ==========================================================================
   3. Problem Statement Section
   ========================================================================== */
.problem-section {
    padding: 100px 0;
    position: relative;
}

.section-header {
    text-align: center;
    max-width: 760px;
    margin: 0 auto 60px;
}
.section-badge {
    display: inline-block;
    font-family: var(--font-heading);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    color: var(--primary);
    background: var(--primary-light);
    padding: 6px 14px;
    border-radius: 20px;
    margin-bottom: 16px;
}
.section-title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    line-height: 1.25;
    margin-bottom: 20px;
}
.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-muted);
    line-height: 1.7;
}

.problem-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}
.problem-card {
    background: var(--surface-card);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 32px 26px;
    transition: var(--transition);
}
.problem-card:hover {
    transform: translateY(-6px);
    border-color: rgba(248, 113, 113, 0.4);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
}
.problem-icon-wrapper {
    width: 54px;
    height: 54px;
    background: rgba(248, 113, 113, 0.12);
    color: #F87171;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
}
.problem-card-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 12px;
    line-height: 1.4;
}
.problem-card-desc {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ==========================================================================
   4. Solution & Core Value Section
   ========================================================================== */
.value-section {
    padding: 100px 0;
    background: linear-gradient(180deg, transparent 0%, rgba(59, 130, 246, 0.03) 50%, transparent 100%);
}

.value-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.card-span-2 { grid-column: span 2; }

@media (max-width: 992px) {
    .value-grid { grid-template-columns: 1fr; }
    .card-span-2 { grid-column: span 1; }
}

.value-card {
    background: var(--surface-card);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    padding: 36px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 28px;
    transition: var(--transition);
}
.value-card:hover {
    transform: translateY(-6px);
    border-color: var(--primary);
    box-shadow: 0 20px 40px rgba(59, 130, 246, 0.12);
}
.value-tag {
    font-family: var(--font-heading);
    font-size: 0.78rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 14px;
}
.value-title {
    font-size: 1.45rem;
    font-weight: 800;
    line-height: 1.35;
    margin-bottom: 12px;
}
.value-desc {
    color: var(--text-muted);
    font-size: 0.98rem;
    line-height: 1.65;
}

/* Value Visual Mockups */
.value-visual {
    background: var(--surface-elevated);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}
.visual-loop .mini-waveform {
    display: flex;
    align-items: center;
    gap: 4px;
    height: 40px;
}
.visual-loop .bar {
    width: 6px;
    background: var(--waveform-inactive);
}
.visual-loop .bar.active {
    background: var(--waveform-active);
    box-shadow: 0 0 6px var(--waveform-active-glow);
}
.mini-tag {
    background: rgba(16, 185, 129, 0.2);
    color: var(--waveform-active);
    font-size: 0.8rem;
    font-weight: 700;
    padding: 6px 12px;
    border-radius: 12px;
}

.visual-speed .speed-badge {
    background: var(--surface-card);
    color: var(--text-muted);
    font-family: var(--font-heading);
    font-weight: 700;
    padding: 8px 14px;
    border-radius: 10px;
    border: 1px solid var(--card-border);
}
.visual-speed .speed-badge.active {
    background: var(--primary);
    color: #FFF;
    border-color: var(--primary);
    box-shadow: 0 0 15px var(--primary-glow);
}

.visual-sync {
    gap: 16px;
    color: var(--text-muted);
}
.sync-icon {
    width: 32px;
    height: 32px;
    color: var(--primary);
}
.sync-link {
    width: 20px;
    height: 20px;
    color: var(--text-muted);
}

.save-card {
    display: flex;
    align-items: center;
    gap: 14px;
    width: 100%;
}

/* ==========================================================================
   5. Learning Flow Section
   ========================================================================== */
.flow-section {
    padding: 100px 0;
}

.flow-timeline {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 28px;
    position: relative;
}

.flow-step {
    position: relative;
    background: var(--surface-card);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 32px;
    transition: var(--transition);
}
.flow-step:hover {
    transform: translateY(-6px);
    border-color: var(--primary);
    box-shadow: 0 15px 35px rgba(59, 130, 246, 0.1);
}
.step-num {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 800;
    color: rgba(255, 255, 255, 0.06);
    position: absolute;
    top: 20px;
    right: 24px;
    line-height: 1;
}
.step-icon {
    width: 52px;
    height: 52px;
    background: var(--primary-light);
    color: var(--primary);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
}
.step-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 10px;
}
.step-desc {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ==========================================================================
   6. Key Features Section
   ========================================================================== */
.features-section {
    padding: 100px 0;
}

.features-tabs-header {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}
.feature-tab {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--surface-card);
    border: 1px solid var(--card-border);
    color: var(--text-muted);
    font-size: 1.05rem;
    font-weight: 600;
    padding: 14px 28px;
    border-radius: 16px;
    cursor: pointer;
    transition: var(--transition);
}
.feature-tab.active {
    background: var(--primary);
    color: #FFF;
    border-color: var(--primary);
    box-shadow: 0 8px 20px var(--primary-glow);
}
.feature-tab:hover:not(.active) {
    background: var(--surface-elevated);
    color: var(--text-main);
}

.feature-panel {
    display: none;
    animation: fadeIn 0.4s ease;
}
.feature-panel.active { display: block; }
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.feature-grid-4 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}
.feature-item {
    background: var(--surface-card);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 32px 24px;
    transition: var(--transition);
}
.feature-item:hover {
    border-color: rgba(255, 255, 255, 0.25);
    transform: translateY(-4px);
}
.feature-icon {
    width: 44px;
    height: 44px;
    color: var(--primary);
    margin-bottom: 20px;
}
.feature-item h4 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 10px;
}
.feature-item p {
    color: var(--text-muted);
    font-size: 0.94rem;
    line-height: 1.6;
}

/* ==========================================================================
   7. Comparison Table Section
   ========================================================================== */
.comparison-section {
    padding: 100px 0;
    background: rgba(14, 16, 23, 0.6);
}

.table-wrapper {
    overflow-x: auto;
    border-radius: 24px;
    border: 1px solid var(--card-border);
    background: var(--surface-card);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
}
.comparison-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}
.comparison-table th,
.comparison-table td {
    padding: 22px 28px;
    border-bottom: 1px solid var(--card-border);
}
.comparison-table th {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    background: var(--surface-elevated);
}
.comparison-table tbody tr:last-child td {
    border-bottom: none;
}
.comparison-table tbody tr:hover {
    background: rgba(255, 255, 255, 0.02);
}
.col-general {
    width: 35%;
    color: var(--text-muted);
}
.col-masterflow {
    width: 40%;
    background: rgba(59, 130, 246, 0.05);
}
.table-brand {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--primary);
}
.table-sub {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: none;
}
.item-name {
    font-weight: 700;
    color: var(--text-main);
}

/* ==========================================================================
   8. User Cases Section
   ========================================================================== */
.usercases-section {
    padding: 100px 0;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 28px;
}
.case-card {
    background: var(--surface-card);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    padding: 36px 30px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 24px;
    transition: var(--transition);
}
.case-card:hover {
    transform: translateY(-6px);
    border-color: var(--primary);
}
.case-badge {
    display: inline-block;
    align-self: flex-start;
    background: var(--primary-light);
    color: var(--primary);
    font-weight: 700;
    font-size: 0.82rem;
    padding: 6px 12px;
    border-radius: 10px;
}
.case-quote {
    font-size: 1.02rem;
    line-height: 1.7;
    color: var(--text-main);
    font-style: italic;
}
.case-author {
    display: flex;
    align-items: center;
    gap: 14px;
    border-top: 1px solid var(--card-border);
    padding-top: 20px;
}
.author-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-weight: 800;
    color: #FFF;
}
.avatar-1 { background: #3B82F6; }
.avatar-2 { background: #8B5CF6; }
.avatar-3 { background: #10B981; }
.author-name { font-weight: 700; color: var(--text-main); }
.author-role { font-size: 0.82rem; color: var(--text-muted); }

/* ==========================================================================
   9. Vision & Workspace Section
   ========================================================================== */
.vision-section {
    padding: 100px 0;
}

.vision-box {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
    background: var(--surface-card);
    border: 1px solid var(--card-border);
    border-radius: 32px;
    padding: 56px 48px;
}

@media (max-width: 1024px) {
    .vision-box { grid-template-columns: 1fr; padding: 40px 24px; }
}

.vision-desc {
    color: var(--text-muted);
    font-size: 1.05rem;
    line-height: 1.7;
    margin-bottom: 32px;
}
.vision-slogan-box {
    border-left: 4px solid var(--primary);
    padding-left: 20px;
}
.slogan-kr {
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--text-main);
    margin-bottom: 6px;
}
.slogan-sub {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.onboarding-mockup {
    background: var(--bg-dark);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    padding: 32px;
}
.onboarding-header {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--text-muted);
    margin-bottom: 16px;
}
.onboarding-question {
    font-size: 1.3rem;
    font-weight: 800;
    margin-bottom: 8px;
}
.onboarding-help {
    font-size: 0.88rem;
    color: var(--text-muted);
    margin-bottom: 24px;
}

.domain-selector-group {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 24px;
}
.domain-card {
    display: flex;
    align-items: center;
    gap: 16px;
    background: var(--surface-card);
    border: 2px solid var(--card-border);
    border-radius: 16px;
    padding: 18px 20px;
    cursor: pointer;
    transition: var(--transition);
}
.domain-card.active {
    border-color: var(--primary);
    background: rgba(59, 130, 246, 0.08);
}
.domain-card.disabled {
    opacity: 0.6;
    cursor: not-allowed;
}
.domain-icon { font-size: 1.8rem; }
.domain-icon svg {
    width: 30px;
    height: 30px;
    stroke-width: 2;
}
.domain-info { flex-grow: 1; }
.domain-title {
    font-weight: 800;
    font-size: 1.05rem;
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.domain-badge {
    font-size: 0.72rem;
    padding: 2px 8px;
    border-radius: 6px;
    font-weight: 700;
}
.active-badge { background: var(--primary); color: #FFF; }
.soon-badge { background: rgba(255, 255, 255, 0.1); color: var(--text-muted); }
.domain-terms { font-size: 0.8rem; color: var(--text-muted); }
.domain-check { width: 24px; height: 24px; color: var(--primary); }

.onboarding-footer-note {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.82rem;
    color: var(--text-muted);
    border-top: 1px solid var(--card-border);
    padding-top: 16px;
}


/* ===========================================================================
   10. Free Tier Section
   ========================================================================== */
.free-tier-section {
    padding: 100px 0;
    background:
        radial-gradient(circle at 18% 10%, rgba(59, 130, 246, 0.14), transparent 34%),
        radial-gradient(circle at 82% 0%, rgba(16, 185, 129, 0.1), transparent 30%),
        rgba(255, 255, 255, 0.012);
    border-top: 1px solid var(--card-border);
    border-bottom: 1px solid var(--card-border);
}

.free-tier-layout {
    display: grid;
    grid-template-columns: minmax(280px, 0.95fr) minmax(0, 1.55fr);
    gap: 28px;
    align-items: stretch;
}

.free-tier-main-card,
.free-tier-policy-card,
.free-tier-note {
    border: 1px solid var(--card-border);
    background: linear-gradient(145deg, rgba(30, 34, 48, 0.92), rgba(20, 23, 32, 0.94));
}

.free-tier-main-card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 28px;
    min-height: 420px;
    padding: 36px;
    border-radius: 26px;
    border-color: rgba(59, 130, 246, 0.38);
    box-shadow: inset 0 1px 0 rgba(59, 130, 246, 0.12), 0 25px 70px rgba(59, 130, 246, 0.12);
}

.free-tier-card-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.free-tier-card-top svg {
    width: 34px;
    height: 34px;
    color: var(--primary);
}

.free-tier-label {
    display: inline-flex;
    width: fit-content;
    padding: 7px 12px;
    border-radius: 999px;
    color: #bfdbfe;
    background: rgba(59, 130, 246, 0.14);
    border: 1px solid rgba(59, 130, 246, 0.3);
    font-size: 0.78rem;
    font-weight: 800;
}

.free-tier-main-card h3,
.free-tier-policy-card h3 {
    color: var(--text-main);
    font-family: var(--font-heading);
    font-weight: 800;
}

.free-tier-main-card h3 {
    font-size: 1.75rem;
    line-height: 1.25;
}

.free-tier-main-card p,
.free-tier-policy-card p,
.free-tier-note {
    color: var(--text-muted);
    line-height: 1.75;
}

.free-tier-policy-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
}

.free-tier-policy-card {
    min-height: 200px;
    padding: 26px;
    border-radius: 22px;
}

.free-tier-policy-card svg {
    width: 26px;
    height: 26px;
    color: var(--primary);
    margin-bottom: 22px;
}

.free-tier-policy-card h3 {
    margin-bottom: 12px;
    font-size: 1.1rem;
}

.free-tier-policy-card p {
    font-size: 0.92rem;
}

.free-tier-note {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 24px;
    padding: 18px 22px;
    border-radius: 18px;
    font-size: 0.92rem;
}

.free-tier-note svg {
    width: 20px;
    min-width: 20px;
    color: var(--success);
}

@media (max-width: 980px) {
    .free-tier-layout,
    .free-tier-policy-grid {
        grid-template-columns: 1fr;
    }

    .free-tier-main-card {
        min-height: auto;
    }
}
/* ==========================================================================
   11. Pricing & Free Start Section
   ========================================================================== */
.pricing-section {
    padding: 100px 0;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 28px;
    align-items: stretch;
}
.pricing-card {
    background: var(--surface-card);
    border: 1px solid var(--card-border);
    border-radius: 28px;
    padding: 40px 32px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 32px;
    position: relative;
    transition: var(--transition);
}
.tier-name {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 8px;
}
.tier-desc {
    color: var(--text-muted);
    font-size: 0.9rem;
    height: 48px;
    margin-bottom: 24px;
}
.tier-price {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 800;
}
.tier-price span {
    font-size: 0.95rem;
    color: var(--text-muted);
    font-weight: 500;
}
.tier-features {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 14px;
    flex-grow: 1;
}
.tier-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.94rem;
    color: var(--text-muted);
}
.tier-features li strong { color: var(--text-main); }

/* ==========================================================================
   11. FAQ Section
   ========================================================================== */
.faq-section {
    padding: 100px 0;
    background: rgba(14, 16, 23, 0.5);
}

.faq-accordion {
    max-width: 840px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.faq-item {
    background: var(--surface-card);
    border: 1px solid var(--card-border);
    border-radius: 18px;
    overflow: hidden;
    transition: var(--transition);
}
.faq-item.active { border-color: var(--primary); }

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 22px 24px;
    background: transparent;
    border: none;
    color: var(--text-main);
    font-size: 1.05rem;
    font-weight: 700;
    text-align: left;
    cursor: pointer;
    gap: 16px;
}
.faq-toggle {
    transition: transform 0.3s ease;
    color: var(--text-muted);
}
.faq-item.active .faq-toggle {
    transform: rotate(180deg);
    color: var(--primary);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding 0.35s ease;
    padding: 0 24px;
}
.faq-item.active .faq-answer {
    max-height: 300px;
    padding: 0 24px 22px;
}
.faq-answer p {
    color: var(--text-muted);
    font-size: 0.96rem;
    line-height: 1.7;
}

/* ==========================================================================
   12. Final CTA & Footer Section
   ========================================================================== */
.final-cta-section {
    padding: 100px 0 60px;
}
.final-cta-box {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.15) 0%, rgba(139, 92, 246, 0.15) 100%);
    border: 1px solid rgba(59, 130, 246, 0.3);
    border-radius: 36px;
    padding: 80px 40px;
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: 0 30px 80px rgba(59, 130, 246, 0.15);
}
.final-cta-title {
    font-family: var(--font-heading);
    font-size: clamp(2.2rem, 4.5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
}
.final-cta-desc {
    font-size: 1.15rem;
    color: var(--text-muted);
    max-width: 680px;
    margin: 0 auto 40px;
    line-height: 1.7;
}
.final-cta-btn-group {
    margin-bottom: 24px;
}
.final-cta-trust {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* Footer */
.footer {
    border-top: 1px solid var(--card-border);
    padding: 80px 0 40px;
    background: #080A0E;
}
.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 48px;
    margin-bottom: 60px;
}

@media (max-width: 992px) {
    .footer-content { grid-template-columns: 1fr; }
}

.footer-tagline {
    font-weight: 700;
    color: var(--text-main);
    margin: 14px 0 8px;
}
.footer-slogan-en {
    font-family: var(--font-heading);
    font-weight: 600;
    color: var(--primary);
    font-size: 0.95rem;
}
.footer-slogan-kr {
    font-size: 0.88rem;
    color: var(--text-muted);
}

.footer-links-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

@media (max-width: 640px) {
    .footer-links-grid { grid-template-columns: 1fr; }
}

.footer-col h4 {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-main);
}
.footer-col a {
    display: block;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    margin-bottom: 12px;
    transition: var(--transition);
}
.footer-col a:hover { color: var(--primary); }

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 32px;
    flex-wrap: wrap;
    gap: 16px;
}
.copyright {
    font-size: 0.85rem;
    color: var(--text-disabled);
}
.footer-social {
    display: flex;
    gap: 16px;
}
.footer-social a {
    color: var(--text-muted);
    transition: var(--transition);
}
.footer-social a:hover { color: var(--primary); }

/* ==========================================================================
   Mobile polish pass
   ========================================================================== */
@media (max-width: 767px) {
    html,
    body {
        overflow-x: hidden;
    }

    .container {
        width: 100%;
        max-width: 100%;
        padding: 0 16px;
    }

    .ambient-glow {
        opacity: 0.22;
        filter: blur(90px);
    }

    .nav-container {
        min-height: 64px;
        padding: 12px 16px;
        gap: 10px;
    }

    .brand-logo {
        min-width: 0;
        gap: 6px;
    }

    .logo-text {
        font-size: 1.08rem;
        letter-spacing: 0;
    }

    .logo-badge {
        padding: 2px 6px;
        font-size: 0.58rem;
        border-radius: 5px;
    }

    .nav-actions {
        gap: 8px;
        flex-shrink: 0;
    }

    .nav-actions .btn-primary {
        display: none;
    }

    .mobile-menu-btn {
        width: 40px;
        height: 40px;
        align-items: center;
        justify-content: center;
        border-radius: 10px;
        background: rgba(255, 255, 255, 0.045);
        border: 1px solid var(--card-border);
    }

    .mobile-nav {
        max-height: calc(100dvh - 64px);
        overflow-y: auto;
        padding: 14px 16px 18px;
    }

    .mobile-link {
        padding: 14px 0;
        font-size: 0.96rem;
    }

    .hero-section,
    .problem-section,
    .value-section,
    .flow-section,
    .features-section,
    .comparison-section,
    .usercases-section,
    .vision-section,
    .free-tier-section,
    .pricing-section,
    .faq-section {
        padding: 64px 0;
    }

    .hero-section {
        padding-top: 46px;
    }

    .section-header {
        margin-bottom: 36px;
    }

    .section-badge,
    .hero-badge {
        max-width: 100%;
    }

    .badge-text,
    .section-subtitle,
    .hero-subtitle {
        word-break: keep-all;
        overflow-wrap: anywhere;
    }

    .hero-title {
        font-size: clamp(2.15rem, 11vw, 3rem);
        line-height: 1.14;
        letter-spacing: 0;
        margin-bottom: 18px;
    }

    .hero-subtitle {
        font-size: 1rem;
        line-height: 1.65;
        margin-bottom: 28px;
    }

    .hero-cta-group,
    .final-cta-btn-group {
        display: grid;
        grid-template-columns: 1fr;
        gap: 12px;
        width: 100%;
    }

    .hero-cta-group .btn-primary,
    .hero-cta-group .btn-secondary,
    .final-cta-btn-group .btn-primary,
    .final-cta-btn-group .btn-secondary {
        width: 100%;
    }

    .btn-lg,
    .btn-xl {
        min-height: 48px;
        padding: 13px 18px;
        font-size: 0.98rem;
    }

    .device-support {
        margin-bottom: 34px;
        gap: 8px;
        font-size: 0.82rem;
    }

    .device-support strong {
        width: 100%;
        margin-left: 0;
        text-align: center;
    }

    .mockup-container {
        margin-top: 8px;
        border-radius: 18px;
    }

    .mockup-header {
        padding: 12px 14px;
        gap: 10px;
    }

    .mockup-dots,
    .mockup-status {
        display: none;
    }

    .mockup-title {
        width: 100%;
        text-align: center;
        font-size: 0.78rem;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .mockup-body {
        min-height: auto;
    }

    .mockup-player-panel,
    .mockup-notes-panel {
        padding: 18px;
        border-right: 0;
    }

    .problem-grid,
    .value-grid,
    .flow-timeline,
    .feature-grid-4,
    .cases-grid,
    .pricing-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .problem-card,
    .value-card,
    .flow-step,
    .feature-item,
    .case-card,
    .pricing-card,
    .free-tier-main-card,
    .free-tier-policy-card {
        border-radius: 18px;
        padding: 24px 20px;
    }

    .value-card,
    .pricing-card {
        gap: 22px;
    }

    .value-visual {
        overflow-x: auto;
        justify-content: flex-start;
    }

    .features-tabs-header {
        justify-content: flex-start;
        flex-wrap: nowrap;
        overflow-x: auto;
        gap: 10px;
        margin: 0 -16px 32px;
        padding: 0 16px 6px;
        scrollbar-width: none;
    }

    .features-tabs-header::-webkit-scrollbar {
        display: none;
    }

    .feature-tab {
        flex: 0 0 auto;
        padding: 11px 16px;
        font-size: 0.92rem;
        border-radius: 12px;
        white-space: nowrap;
    }

    .table-wrapper {
        margin: 0 -16px;
        border-radius: 0;
        border-left: 0;
        border-right: 0;
        -webkit-overflow-scrolling: touch;
    }

    .comparison-table {
        min-width: 720px;
    }

    .comparison-table th,
    .comparison-table td {
        padding: 16px 18px;
        white-space: normal;
        vertical-align: top;
    }

    .col-general,
    .col-masterflow {
        width: auto;
    }

    .free-tier-layout,
    .free-tier-policy-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .free-tier-note {
        align-items: flex-start;
        padding: 16px;
        font-size: 0.88rem;
    }

    .tier-desc {
        height: auto;
        margin-bottom: 18px;
    }

    .tier-price {
        font-size: 2.1rem;
    }

    .tier-features li {
        align-items: flex-start;
        line-height: 1.55;
    }

    .faq-question {
        padding: 18px;
        font-size: 0.98rem;
    }

    .faq-answer,
    .faq-item.active .faq-answer {
        padding-left: 18px;
        padding-right: 18px;
    }

    .final-cta-section {
        padding: 64px 0 44px;
    }

    .final-cta-box {
        border-radius: 24px;
        padding: 48px 20px;
    }

    .footer {
        padding: 56px 0 32px;
    }

    .footer-content {
        gap: 36px;
        margin-bottom: 40px;
    }

    .footer-bottom {
        align-items: flex-start;
        flex-direction: column;
    }
}

@media (max-width: 420px) {
    .container {
        padding: 0 14px;
    }

    .nav-container {
        padding-left: 14px;
        padding-right: 14px;
    }

    .logo-badge {
        display: none;
    }

    .hero-title {
        font-size: 2.05rem;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .table-wrapper {
        margin-left: -14px;
        margin-right: -14px;
    }

    .comparison-table {
        min-width: 680px;
    }
}

/* Mobile clipping fixes after device review */
@media (max-width: 767px) {
    .waveform-box {
        padding: 14px 10px;
    }

    .time-rulers {
        display: grid;
        grid-template-columns: repeat(4, minmax(0, 1fr));
        gap: 6px;
        font-size: 0.68rem;
        text-align: center;
    }

    .time-rulers span:last-child {
        display: none;
    }

    .waveform-canvas {
        height: 116px;
        gap: 2px;
        justify-content: center;
        overflow: visible;
    }

    .wave-group {
        gap: 2px;
    }

    .bar {
        width: 3px;
    }

    .wave-loop-region {
        gap: 2px;
        padding: 0 6px;
    }

    .handle-tag {
        top: -22px;
        font-size: 0.6rem;
        padding: 2px 5px;
    }

    .playhead-tag {
        font-size: 0.64rem;
    }

    .player-controls {
        padding: 14px;
        justify-content: center;
        align-items: stretch;
    }

    .control-group-left,
    .control-group-center,
    .control-group-right {
        justify-content: center;
        width: 100%;
    }

    .speed-selector,
    .loop-counter {
        width: 100%;
    }

    .speed-label {
        text-align: center;
    }

    .speed-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }

    .loop-counter {
        justify-content: center;
        flex-wrap: wrap;
    }

    .panel-tab-header {
        display: grid;
        grid-template-columns: 1fr;
        gap: 8px;
        overflow: visible;
    }

    .tab-btn {
        justify-content: center;
        min-width: 0;
        width: 100%;
        white-space: normal;
        line-height: 1.35;
    }

    .notes-list {
        max-height: none;
        overflow: visible;
        padding-right: 0;
    }

    .note-add-box {
        flex-direction: column;
    }

    .btn-add-note {
        min-height: 42px;
    }

    .save-status-footer {
        align-items: flex-start;
        padding: 12px;
    }

    .features-tabs-header {
        display: grid;
        grid-template-columns: 1fr;
        margin: 0 0 32px;
        padding: 0;
        overflow: visible;
    }

    .feature-tab {
        width: 100%;
        justify-content: center;
        white-space: normal;
        text-align: center;
    }

    .table-wrapper {
        margin: 0;
        overflow: visible;
        border-left: 1px solid var(--card-border);
        border-right: 1px solid var(--card-border);
        border-radius: 18px;
    }

    .comparison-table {
        min-width: 0;
        width: 100%;
        table-layout: fixed;
    }

    .comparison-table th,
    .comparison-table td {
        padding: 14px 10px;
        font-size: 0.82rem;
        line-height: 1.55;
        word-break: keep-all;
        overflow-wrap: anywhere;
    }

    .comparison-table th {
        font-size: 0.72rem;
        letter-spacing: 0;
    }

    .comparison-table th:first-child,
    .comparison-table td:first-child {
        width: 31%;
    }

    .comparison-table th:nth-child(2),
    .comparison-table td:nth-child(2) {
        width: 33%;
    }

    .comparison-table th:nth-child(3),
    .comparison-table td:nth-child(3) {
        width: 36%;
    }

    .table-brand {
        font-size: 0.92rem;
    }

    .table-sub {
        display: block;
        margin-top: 2px;
        font-size: 0.62rem;
    }

    .item-name {
        font-size: 0.82rem;
        line-height: 1.55;
    }
}

@media (max-width: 420px) {
    .mockup-player-panel,
    .mockup-notes-panel {
        padding: 16px 12px;
    }

    .asset-info {
        align-items: flex-start;
    }

    .asset-thumb {
        width: 44px;
        height: 44px;
        flex-shrink: 0;
    }

    .asset-title {
        font-size: 0.94rem;
        line-height: 1.35;
    }

    .asset-meta,
    .loop-status-pill {
        font-size: 0.72rem;
    }

    .loop-status-pill {
        width: 100%;
        justify-content: center;
        white-space: normal;
        text-align: center;
    }

    .waveform-box {
        padding-left: 8px;
        padding-right: 8px;
    }

    .waveform-canvas {
        height: 108px;
        gap: 1px;
    }

    .wave-group {
        gap: 1px;
    }

    .bar {
        width: 2.5px;
    }

    .wave-loop-region {
        gap: 1px;
        padding: 0 4px;
    }

    .comparison-table th,
    .comparison-table td {
        padding: 12px 8px;
        font-size: 0.76rem;
    }

    .item-name {
        font-size: 0.78rem;
    }
}

/* Speed examples should show fine-grained steps clearly. */
.visual-speed {
    flex-wrap: wrap;
}

@media (max-width: 420px) {
    .visual-speed .speed-badge {
        flex: 1 1 calc(50% - 8px);
        text-align: center;
    }
}

/* Simplified shortcut pad mockup */
.shortcut-pad-mockup {
    background: var(--surface-elevated);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 16px;
}

.shortcut-pad-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    margin-bottom: 14px;
}

.shortcut-pad-head span {
    color: var(--text-main);
    font-size: 0.88rem;
    font-weight: 800;
}

.shortcut-pad-head small {
    color: var(--text-muted);
    font-size: 0.72rem;
    text-align: right;
}

.shortcut-pad-simple-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 10px;
}

.shortcut-chip {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    border-radius: 12px;
    border: 1px solid var(--card-border);
    background: rgba(255, 255, 255, 0.045);
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 800;
    text-align: center;
}

.shortcut-chip.active {
    border-color: rgba(245, 158, 11, 0.5);
    background: rgba(245, 158, 11, 0.15);
    color: #fbbf24;
}

.shortcut-chip.play {
    border-color: rgba(59, 130, 246, 0.6);
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    color: #fff;
    box-shadow: 0 10px 24px rgba(59, 130, 246, 0.24);
}

@media (max-width: 767px) {
    .shortcut-pad-mockup {
        padding: 14px;
    }

    .shortcut-pad-head {
        align-items: flex-start;
        flex-direction: column;
        gap: 4px;
    }

    .shortcut-pad-head small {
        text-align: left;
    }

    .shortcut-pad-simple-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 8px;
    }

    .shortcut-chip {
        min-height: 42px;
    }
}

.footer-social .social-letter {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.04);
    font-size: 0.66rem;
    font-weight: 800;
    color: currentColor;
}

/* ==========================================================================
   Responsive presentation layers
   Compact: 0-767px · Medium: 768-1279px · Wide: 1280px+
   ========================================================================== */
html,
body {
    overflow-x: clip;
}

[hidden] {
    display: none !important;
}

.mobile-menu-btn,
.mobile-link,
.faq-question,
.pricing-card .btn-full {
    min-height: 44px;
}

.hero-title,
.section-title,
.tier-name,
.tier-desc,
.tier-features li,
.faq-question,
.footer {
    word-break: keep-all;
}

.tier-name,
.tier-desc,
.tier-features li,
.faq-question,
.footer a {
    overflow-wrap: anywhere;
}

@media (max-width: 767px) {
    .hero-title,
    .section-title {
        overflow-wrap: normal;
    }

    .mobile-menu-btn {
        width: 44px;
        height: 44px;
        padding: 10px;
    }

    .mobile-link {
        display: flex;
        align-items: center;
    }

    .comparison-table .table-brand {
        font-size: 0.78rem;
        letter-spacing: -0.02em;
        white-space: nowrap;
    }

    .comparison-table .table-sub {
        overflow-wrap: anywhere;
    }
}

@media (min-width: 768px) and (max-width: 1279px) {
    .container {
        max-width: 1120px;
        padding-inline: 32px;
    }

    .nav-container {
        padding: 14px 32px;
    }

    .nav-links,
    .nav-actions > .btn-ghost {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
        width: 44px;
        height: 44px;
        align-items: center;
        justify-content: center;
        padding: 10px;
        border: 1px solid var(--card-border);
        border-radius: 12px;
        background: rgba(255, 255, 255, 0.045);
    }

    .mobile-nav {
        max-height: calc(100dvh - 72px);
        overflow-y: auto;
        padding-inline: 32px;
    }

    .hero-section {
        padding: 72px 0 84px;
    }

    .hero-title {
        font-size: clamp(3rem, 7vw, 4rem);
    }

    .hero-subtitle {
        max-width: 720px;
    }

    .hero-cta-group,
    .final-cta-btn-group {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        width: min(100%, 680px);
        margin-inline: auto;
    }

    .hero-cta-group .btn-primary,
    .hero-cta-group .btn-secondary,
    .final-cta-btn-group .btn-primary,
    .final-cta-btn-group .btn-secondary {
        width: 100%;
        min-height: 48px;
    }

    .problem-section,
    .value-section,
    .flow-section,
    .features-section,
    .comparison-section,
    .usercases-section,
    .vision-section,
    .pricing-section,
    .faq-section {
        padding-block: 80px;
    }

    .problem-grid,
    .value-grid,
    .flow-timeline,
    .feature-grid-4,
    .cases-grid,
    .pricing-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 22px;
    }

    .value-grid .card-span-2 {
        grid-column: span 2;
    }

    .features-tabs-header {
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 12px;
    }

    .feature-tab {
        justify-content: center;
        min-width: 0;
        padding-inline: 16px;
        text-align: center;
    }

    .pricing-grid > .pricing-card:last-child,
    .cases-grid > .case-card:last-child {
        grid-column: 1 / -1;
        width: calc(50% - 11px);
        justify-self: center;
    }

    .pricing-card,
    .case-card,
    .problem-card,
    .feature-item,
    .flow-step {
        padding: 28px 26px;
    }

    .tier-desc {
        height: auto;
        min-height: 48px;
    }

    .comparison-table th,
    .comparison-table td {
        padding: 18px 20px;
    }

    .vision-box {
        padding: 40px 36px;
    }
}

@media (min-width: 1024px) and (max-width: 1279px) {
    .problem-grid,
    .flow-timeline,
    .feature-grid-4 {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .cases-grid,
    .pricing-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .pricing-grid > .pricing-card:last-child,
    .cases-grid > .case-card:last-child {
        grid-column: auto;
        width: auto;
    }
}