/* ==========================================================================
   Peninsula Website - iOS Liquid Glass Design System
   Based on industry research: screen.studio, iOS 26 liquid glass patterns
   ========================================================================== */

:root {
    /* Colors - Dark aesthetic with subtle accents */
    --bg-base: #000000;
    --bg-elevated: #0a0a0a;
    --bg-card: #13151b;

    /* Liquid Glass - iOS style */
    --glass-bg: rgba(0, 0, 0, 0.5);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-border-subtle: rgba(255, 255, 255, 0.05);
    --glass-highlight: rgba(255, 255, 255, 0.1);

    /* Modern Gradients - Mesh/Radial style */
    --gradient-primary: radial-gradient(circle at 20% 30%, rgba(59, 130, 246, 0.15) 0%, transparent 50%);
    --gradient-secondary: radial-gradient(circle at 80% 70%, rgba(251, 146, 60, 0.12) 0%, transparent 50%);
    --gradient-accent: radial-gradient(circle at 50% 100%, rgba(139, 92, 246, 0.08) 0%, transparent 60%);

    /* Text */
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-tertiary: rgba(255, 255, 255, 0.55);

    /* Spacing */
    --space-xs: 8px;
    --space-sm: 12px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;
    --space-4xl: 96px;

    /* Radius - Subtle, modern */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 18px;

    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', sans-serif;
    background: var(--bg-base);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    position: relative;
}

/* Fixed mesh gradient background - only visible through glass components */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        var(--gradient-primary),
        var(--gradient-secondary),
        var(--gradient-accent);
    pointer-events: none;
    z-index: 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-xl);
    position: relative;
    z-index: 1;
}

/* ==========================================================================
   LIQUID GLASS HEADER BAR (iOS style)
   ========================================================================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.05);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid var(--glass-border-subtle);
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-md) var(--space-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header-logo {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
}

.header-nav {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.header-nav a {
    font-size: 14px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.header-nav a:hover {
    color: var(--text-primary);
}

.header-cta {
    background: linear-gradient(135deg, #3B82F6 0%, #8B5CF6 100%);
    color: white;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.header-cta:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
}

/* ==========================================================================
   HERO SECTION - Full Viewport Height (Responsive)
   ========================================================================== */

.hero {
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    z-index: 1;
    padding: 80px var(--space-lg) var(--space-xl);
    gap: clamp(var(--space-md), 2vh, var(--space-lg));
}

.hero .container {
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: clamp(var(--space-md), 2vh, var(--space-lg));
}

.hero-title {
    font-size: clamp(36px, 6vw, 82px);
    font-weight: 700;
    letter-spacing: -2.5px;
    margin: 0;
    background: linear-gradient(135deg, #fff 0%, rgba(255, 255, 255, 0.75) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
    line-height: 1.1;
}

.hero-subtitle {
    font-size: clamp(16px, 2.5vw, 24px);
    color: var(--text-secondary);
    margin: 0;
    max-width: 900px;
    animation: fadeInUp 0.8s cubic-bezier(0.34, 1.56, 0.64, 1) 0.1s backwards;
    line-height: 1.4;
}

/* Subtle Gradient Accent with Delicate Shimmer */
.accent-gradient {
    background:
        linear-gradient(
            90deg,
            transparent 0%,
            transparent 35%,
            rgba(255, 255, 255, 0.18) 50%,
            transparent 65%,
            transparent 100%
        ),
        linear-gradient(
            135deg,
            #6B9BD1 0%,
            #8B7FC7 50%,
            #C4A895 100%
        );
    background-size: 200% 100%, 100% 100%;
    background-position: -100% center, 0% center;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
    animation: subtleShimmer 8s ease-in-out infinite;
}

@keyframes subtleShimmer {
    0% {
        background-position: -100% center, 0% center;
    }
    20% {
        background-position: 200% center, 0% center;
    }
    100% {
        background-position: 200% center, 0% center;
    }
}

.hero-preview {
    width: 100%;
    max-width: min(1400px, 90vw);
    flex: 0 1 auto;
    max-height: 35vh;
    animation: fadeInUp 0.8s cubic-bezier(0.34, 1.56, 0.64, 1) 0.2s backwards;
}

.preview-video {
    position: relative;
    height: 100%;
    /* Fade edges into background with gradient overlay support */
    mask-image: radial-gradient(ellipse 90% 90% at 50% 50%, black 50%, transparent 100%);
    -webkit-mask-image: radial-gradient(ellipse 90% 90% at 50% 50%, black 50%, transparent 100%);
}

/* Gradient overlay for both placeholder and video */
.preview-video::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 60% 60% at 35% 45%, rgba(59, 130, 246, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse 60% 60% at 65% 55%, rgba(251, 146, 60, 0.05) 0%, transparent 50%);
    border-radius: var(--radius-xl);
    pointer-events: none;
    z-index: 1;
}

.video-placeholder,
.demo-video {
    width: 100%;
    height: 100%;
    max-height: 35vh;
    object-fit: contain;
    display: block;
    background: transparent;
    position: relative;
    border-radius: var(--radius-xl);
}

.video-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    aspect-ratio: 32 / 9; /* Ultrawide for notch recording */
}

.demo-video {
    aspect-ratio: 32 / 9; /* Ultrawide for notch recording */
}

.notch-mockup {
    background: var(--glass-bg);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: var(--space-sm) var(--space-lg);
    position: relative;
    z-index: 1;
}

.notch-content-preview {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 14px;
    color: var(--text-secondary);
}

.music-icon {
    font-size: 18px;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

.hero-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
    margin: 0;
    animation: fadeInUp 0.8s cubic-bezier(0.34, 1.56, 0.64, 1) 0.3s backwards;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 14px 28px;
    border-radius: var(--radius-md);
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-base);
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.btn svg {
    width: 16px;
    height: 16px;
    transition: transform var(--transition-fast);
}

.btn:hover svg {
    transform: translateY(1px);
}

.btn-primary {
    background: linear-gradient(135deg, #3B82F6 0%, #8B5CF6 100%);
    color: white;
    box-shadow: 0 4px 16px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(59, 130, 246, 0.5);
}

.btn-secondary {
    background: var(--glass-bg);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-2px);
    border-color: var(--glass-highlight);
}

.version-info {
    font-size: 14px;
    color: var(--text-tertiary);
    margin: 0;
    animation: fadeInUp 0.8s cubic-bezier(0.34, 1.56, 0.64, 1) 0.4s backwards;
}

.version-number {
    color: #3B82F6;
    font-weight: 600;
}

.separator {
    margin: 0 var(--space-xs);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==========================================================================
   LIQUID GLASS COMPONENTS
   ========================================================================== */

.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(15px) saturate(180%);
    -webkit-backdrop-filter: blur(15px) saturate(180%);
    border: 1px solid var(--glass-border);
    box-shadow:
        0 8px 32px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 var(--glass-highlight);
    position: relative;
    transition: all var(--transition-base);
}

.glass:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: var(--glass-highlight);
    transform: translateY(-2px);
    box-shadow:
        0 12px 40px rgba(0, 0, 0, 0.4),
        inset 0 1px 0 var(--glass-highlight);
}

/* ==========================================================================
   FEATURES SHOWCASE
   ========================================================================== */

.features-showcase {
    padding: var(--space-4xl) 0;
}

.showcase-layout {
    display: grid;
    grid-template-columns: 340px 1fr;
    gap: var(--space-3xl);
    align-items: start;
}

.feature-selector {
    position: sticky;
    top: 140px;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.feature-item {
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    border: 1px solid transparent;
    position: relative;
}

.feature-item::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: var(--glass-bg);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.feature-item:hover::before {
    opacity: 1;
}

.feature-item.active {
    background: var(--glass-bg);
    backdrop-filter: blur(15px) saturate(180%);
    -webkit-backdrop-filter: blur(15px) saturate(180%);
    border-color: var(--glass-border);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.feature-item > * {
    position: relative;
    z-index: 1;
}

.feature-item h3 {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.feature-item p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.feature-display {
    position: relative;
    min-height: 450px;
}

.feature-content {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.feature-content.active {
    opacity: 1;
    visibility: visible;
}

.feature-media {
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--bg-card);
    border: 1px solid var(--glass-border-subtle);
    box-shadow:
        0 12px 32px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 var(--glass-highlight);
}

.feature-media img {
    width: 100%;
    height: auto;
    display: block;
}

/* ==========================================================================
   UI STYLES SECTION
   ========================================================================== */

.ui-styles {
    padding: var(--space-4xl) 0;
    text-align: center;
}

.ui-toggle {
    display: inline-flex;
    gap: 0;
    background: var(--glass-bg);
    backdrop-filter: blur(15px) saturate(180%);
    -webkit-backdrop-filter: blur(15px) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 4px;
    margin: 0 auto var(--space-3xl);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.toggle-option {
    padding: 10px 24px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 600;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
}

.toggle-option.active {
    background: linear-gradient(135deg, #3B82F6 0%, #8B5CF6 100%);
    color: white;
    box-shadow: 0 2px 8px rgba(59, 130, 246, 0.4);
}

.toggle-option:not(.active):hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.ui-preview {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.ui-content {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.ui-content:first-child {
    position: relative;
}

.ui-content.active {
    opacity: 1;
    visibility: visible;
}

.ui-media {
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--bg-card);
    border: 1px solid var(--glass-border-subtle);
    box-shadow:
        0 12px 32px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 var(--glass-highlight);
}

.ui-media img {
    width: 100%;
    height: auto;
    display: block;
}

/* ==========================================================================
   REQUIREMENTS & STEPS
   ========================================================================== */

.requirements,
.getting-started {
    padding: var(--space-3xl) 0;
}

.section-title {
    font-size: clamp(32px, 5vw, 42px);
    font-weight: 700;
    letter-spacing: -1px;
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.requirements-grid,
.steps-grid {
    display: grid;
    gap: var(--space-lg);
}

.requirements-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.steps-grid {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.requirement-item,
.step-item {
    border-radius: var(--radius-md);
    padding: var(--space-lg);
}

.requirement-item {
    display: flex;
    gap: var(--space-md);
}

.requirement-icon,
.step-number {
    flex-shrink: 0;
}

.requirement-icon {
    font-size: 36px;
    line-height: 1;
}

.step-item {
    text-align: center;
}

.step-number {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, #3B82F6 0%, #8B5CF6 100%);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 20px;
    margin: 0 auto var(--space-md);
    box-shadow: 0 4px 16px rgba(59, 130, 246, 0.3);
}

.requirement-details h4,
.step-item h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 6px;
}

.requirement-details p,
.step-item p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ==========================================================================
   FAQ
   ========================================================================== */

.faq {
    padding: var(--space-3xl) 0;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.faq-item {
    border-radius: var(--radius-md);
    overflow: hidden;
}

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md) var(--space-lg);
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 16px;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
    transition: all var(--transition-base);
}

.faq-question:hover {
    background: rgba(255, 255, 255, 0.03);
}

.faq-icon {
    flex-shrink: 0;
    transition: transform var(--transition-base);
    color: var(--text-secondary);
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow);
}

.faq-item.active .faq-answer {
    max-height: 300px;
}

.faq-answer p {
    padding: 0 var(--space-lg) var(--space-md);
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */

.footer {
    border-top: 1px solid var(--glass-border-subtle);
    padding: var(--space-3xl) 0;
    margin-top: var(--space-4xl);
}

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

.footer-copyright,
.footer-note {
    color: var(--text-tertiary);
    margin-bottom: var(--space-sm);
}

.footer-copyright {
    font-size: 14px;
}

.footer-note {
    font-size: 13px;
}

.footer-links {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-sm);
}

.footer-links a {
    font-size: 14px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: #3B82F6;
}

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */

/* Keep subtitle on one line for larger screens */
@media (min-width: 769px) {
    .hero-subtitle {
        white-space: nowrap;
    }
}

@media (max-width: 968px) {
    .showcase-layout {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }

    .feature-selector {
        position: relative;
        top: 0;
        flex-direction: row;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        gap: var(--space-md);
    }

    .feature-selector::-webkit-scrollbar {
        display: none;
    }

    .feature-item {
        flex-shrink: 0;
        min-width: 240px;
    }
}

@media (max-width: 768px) {
    .hero {
        height: 100vh;
        padding: 70px var(--space-md) var(--space-lg);
        gap: clamp(var(--space-sm), 1.5vh, var(--space-md));
    }

    .hero .container {
        gap: clamp(var(--space-sm), 1.5vh, var(--space-md));
    }

    .hero-title {
        font-size: clamp(32px, 7vw, 48px);
        line-height: 1;
    }

    .hero-subtitle {
        font-size: clamp(15px, 3vw, 18px);
    }

    .hero-preview {
        max-height: 30vh;
    }

    .video-placeholder,
    .demo-video {
        max-height: 30vh;
    }

    .hero-actions {
        flex-direction: column;
        align-items: stretch;
        width: 100%;
        max-width: 400px;
    }

    .requirements-grid,
    .steps-grid {
        grid-template-columns: 1fr;
    }

    .header-nav {
        display: none;
    }

    .preview-video {
        mask-image: radial-gradient(ellipse 85% 85% at 50% 50%, black 40%, transparent 100%);
        -webkit-mask-image: radial-gradient(ellipse 85% 85% at 50% 50%, black 40%, transparent 100%);
    }

    .ui-toggle {
        width: 100%;
        max-width: 320px;
    }

    .toggle-option {
        flex: 1;
        padding: 10px 16px;
        font-size: 13px;
    }
}

@media (max-width: 480px) {
    :root {
        --space-xl: 20px;
        --space-2xl: 32px;
        --space-3xl: 48px;
        --space-4xl: 64px;
    }

    .hero {
        padding: 60px var(--space-sm) var(--space-md);
    }

    .hero-title {
        font-size: clamp(28px, 8vw, 40px);
    }

    .hero-preview {
        max-height: 25vh;
    }

    .video-placeholder,
    .demo-video {
        aspect-ratio: 21 / 9; /* Slightly less wide on mobile */
        max-height: 25vh;
    }

    .btn {
        padding: 12px 20px;
        font-size: 14px;
    }
}