/* ===========================
   CSS Variables & Root Styles
   =========================== */
:root {
    /* Light Mode Colors - Darker Palette */
    --bg-primary: #f5f0f3;
    --bg-secondary: rgba(245, 240, 243, 0.8);
    --text-primary: #1a1a1a;
    --text-secondary: #4a4a4a;
    --accent-primary: #e8a0ab;
    --accent-secondary: #f5c5cd;
    --accent-gradient: linear-gradient(135deg, rgba(232, 160, 171, 0.7), rgba(245, 197, 205, 0.5));
    --card-bg: rgba(255, 255, 255, 0.5);
    --card-border: rgba(232, 160, 171, 0.4);
    --shadow-color: rgba(232, 160, 171, 0.3);
    --blob-1: rgba(232, 160, 171, 0.35);
    --blob-2: rgba(245, 197, 205, 0.35);
    --blob-3: rgba(240, 180, 190, 0.35);
}

[data-theme="dark"] {
    /* Dark Mode Colors */
    --bg-primary: #0f0f1e;
    --bg-secondary: rgba(20, 20, 35, 0.8);
    --text-primary: #e8e8e8;
    --text-secondary: #a0a0a0;
    --accent-primary: #ff6b9d;
    --accent-secondary: #c084fc;
    --accent-gradient: linear-gradient(135deg, rgba(255, 107, 157, 0.4), rgba(192, 132, 252, 0.3));
    --card-bg: rgba(30, 30, 50, 0.5);
    --card-border: rgba(255, 107, 157, 0.4);
    --shadow-color: rgba(255, 107, 157, 0.3);
    --blob-1: rgba(255, 107, 157, 0.2);
    --blob-2: rgba(192, 132, 252, 0.2);
    --blob-3: rgba(139, 92, 246, 0.2);
}

/* ===========================
   Base Styles
   =========================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    transition: background 0.5s ease, color 0.5s ease;
}

/* ===========================
   Theme Toggle Button
   =========================== */
.theme-toggle {
    position: fixed;
    top: 2rem;
    right: 2rem;
    z-index: 1000;
    width: 50px;
    height: 50px;
    border: none;
    border-radius: 50%;
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--card-border);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 16px var(--shadow-color);
}

.theme-toggle:hover {
    transform: scale(1.1) rotate(15deg);
    box-shadow: 0 8px 24px var(--shadow-color);
}

.theme-toggle svg {
    width: 24px;
    height: 24px;
    color: var(--text-primary);
    transition: all 0.3s ease;
}

.theme-toggle .moon-icon {
    display: none;
}

[data-theme="dark"] .theme-toggle .sun-icon {
    display: none;
}

[data-theme="dark"] .theme-toggle .moon-icon {
    display: block;
}

/* ===========================
   Animated Background Blobs
   =========================== */
.background-blur {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    animation: float 20s ease-in-out infinite;
    opacity: 0.8;
}

.blob-1 {
    width: 500px;
    height: 500px;
    background: var(--blob-1);
    top: -10%;
    left: -10%;
    animation-delay: 0s;
}

.blob-2 {
    width: 400px;
    height: 400px;
    background: var(--blob-2);
    bottom: -10%;
    right: -10%;
    animation-delay: 7s;
}

.blob-3 {
    width: 450px;
    height: 450px;
    background: var(--blob-3);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: 14s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    33% {
        transform: translate(50px, -50px) scale(1.1);
    }
    66% {
        transform: translate(-50px, 50px) scale(0.9);
    }
}

/* ===========================
   Corner Logo
   =========================== */
.corner-logo {
    position: fixed;
    top: 2rem;
    left: 2rem;
    z-index: 999;
    width: 60px;
    height: 60px;
    animation: fadeIn 1s ease-out;
}

.corner-logo img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    filter: drop-shadow(0 4px 12px var(--shadow-color));
    transition: transform 0.3s ease;
}

.corner-logo:hover img {
    transform: scale(1.1) rotate(5deg);
}

/* ===========================
   Header / Banner
   =========================== */
.header {
    text-align: center;
    margin-bottom: 2.5rem;
    animation: fadeInDown 1s ease-out;
}

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

.title-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    padding: 2.5rem 2rem;
    box-shadow: 0 8px 32px var(--shadow-color);
    max-width: 700px;
    margin: 0 auto;
    animation: floatCard 6s ease-in-out infinite;
}

@keyframes floatCard {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.title {
    font-family: 'Alumni Sans', sans-serif;
    font-size: clamp(3rem, 10vw, 6rem);
    font-weight: 800;
    margin-bottom: 0;
    line-height: 1.1;
    letter-spacing: 0.05em;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradientShift 3s ease infinite;
}

.title-tagline {
    display: none;
}

@keyframes gradientShift {
    0%, 100% {
        filter: hue-rotate(0deg);
    }
    50% {
        filter: hue-rotate(20deg);
    }
}

/* ===========================
   Product Presentation / Demo
   =========================== */
.product-presentation {
    text-align: center;
    margin-bottom: 3rem;
    animation: fadeInUp 0.8s ease-out 0.3s backwards;
}

.presentation-title {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 2rem;
}

.presentation-subtitle {
    display: none;
}

.demo-player {
    background: rgba(32, 32, 32, 0.95);
    backdrop-filter: blur(20px);
    border-radius: 50px;
    padding: 12px 20px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: 0;
    transition: all 0.4s ease;
}

.demo-player:hover {
    box-shadow: 0 12px 48px var(--shadow-color);
    transform: translateY(-5px);
}

.demo-btn {
    width: 40px;
    height: 40px;
    min-width: 40px;
    min-height: 40px;
    border-radius: 50%;
    border: none;
    background: rgba(255, 255, 255, 0.12);
    color: rgba(255, 255, 255, 0.9);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    flex-shrink: 0;
    padding: 0;
    margin: 0;
    position: relative;
}

.demo-btn:hover {
    background: rgba(255, 182, 193, 0.3);
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(255, 182, 193, 0.2);
}

.demo-btn:active {
    transform: scale(0.95);
    animation: pulse 0.4s ease;
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(255, 182, 193, 0.7);
    }
    50% {
        box-shadow: 0 0 0 20px rgba(255, 182, 193, 0);
    }
}

.demo-btn svg {
    width: 20px;
    height: 20px;
    display: block;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
}

.demo-play {
    width: 48px;
    height: 48px;
    min-width: 48px;
    min-height: 48px;
    background: linear-gradient(135deg, rgba(255, 182, 193, 0.4), rgba(255, 218, 224, 0.3));
}

.demo-play:hover {
    background: linear-gradient(135deg, rgba(255, 182, 193, 0.5), rgba(255, 218, 224, 0.4));
    transform: scale(1.12);
    box-shadow: 0 6px 16px rgba(255, 182, 193, 0.3);
}

.demo-play svg {
    width: 22px;
    height: 22px;
}

.demo-play .pause-icon {
    display: none;
}

.demo-play.playing .play-icon {
    display: none;
}

.demo-play.playing .pause-icon {
    display: block;
}

.demo-history {
    width: 35px;
    height: 35px;
    min-width: 35px;
    min-height: 35px;
    background: rgba(100, 150, 255, 0.2);
}

.demo-history:hover {
    background: rgba(100, 150, 255, 0.3);
}

.demo-history svg {
    width: 18px;
    height: 18px;
}

.demo-hint {
    display: none;
}

/* ===========================
   Container & Layout
   =========================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 8rem 2rem 4rem;
    position: relative;
    z-index: 1;
}

/* Remove old header styles */
.logo-container,
.logo,
.subtitle-container,
.subtitle,
.tagline {
    display: none;
}

/* ===========================
   Cards Grid
   =========================== */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    padding: 2.5rem;
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    box-shadow: 0 8px 32px var(--shadow-color);
    animation: fadeInUp 0.8s ease-out backwards;
}

.card:nth-child(1) {
    animation-delay: 0.2s;
}

.card:nth-child(2) {
    animation-delay: 0.4s;
}

.card:nth-child(3) {
    animation-delay: 0.6s;
}

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

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--accent-gradient);
    opacity: 0;
    transition: opacity 0.4s ease;
    z-index: -1;
}

.card:hover {
    transform: translateY(-12px) scale(1.02);
    box-shadow: 0 16px 48px var(--shadow-color);
    border-color: var(--accent-primary);
}

.card:hover::before {
    opacity: 0.15;
}

.card-icon {
    width: 60px;
    height: 60px;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-gradient);
    border-radius: 16px;
    transition: all 0.4s ease;
}

.card:hover .card-icon {
    transform: scale(1.1) rotate(5deg);
}

.card-icon svg {
    width: 32px;
    height: 32px;
    color: white;
}

.card-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.card-description {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.card-arrow {
    font-size: 2rem;
    color: var(--accent-primary);
    transition: transform 0.3s ease;
    display: inline-block;
}

.card:hover .card-arrow {
    transform: translateX(8px);
}

/* ===========================
   Footer
   =========================== */
.footer {
    text-align: center;
    padding: 3rem 0 2rem;
    border-top: 1px solid var(--card-border);
    animation: fadeIn 1s ease-out 0.8s backwards;
}

.footer p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.footer-links a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.footer-links a:hover {
    color: var(--accent-primary);
    transform: translateY(-2px);
}

.footer-links svg {
    width: 20px;
    height: 20px;
}

/* ===========================
   Responsive Design
   =========================== */
@media (max-width: 768px) {
    .corner-logo {
        top: 1rem;
        left: 1rem;
        width: 50px;
        height: 50px;
    }

    .container {
        padding: 6rem 1rem 2rem;
    }

    .header {
        margin-bottom: 2rem;
    }

    .title-card {
        padding: 2rem 1.5rem;
    }

    .product-presentation {
        margin-bottom: 2.5rem;
    }

    .demo-player {
        padding: 10px 16px;
        gap: 12px;
    }

    .demo-btn {
        width: 36px;
        height: 36px;
        min-width: 36px;
        min-height: 36px;
    }

    .demo-play {
        width: 42px;
        height: 42px;
        min-width: 42px;
        min-height: 42px;
    }

    .demo-history {
        width: 32px;
        height: 32px;
        min-width: 32px;
        min-height: 32px;
    }

    .demo-history svg {
        width: 16px;
        height: 16px;
    }

    .cards-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .card {
        padding: 2rem;
    }

    .theme-toggle {
        top: 1rem;
        right: 1rem;
        width: 45px;
        height: 45px;
    }

    .blob {
        filter: blur(60px);
    }

    .blob-1 {
        width: 300px;
        height: 300px;
    }

    .blob-2 {
        width: 250px;
        height: 250px;
    }

    .blob-3 {
        width: 280px;
        height: 280px;
    }
}

/* ===========================
   Accessibility
   =========================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for accessibility */
button:focus-visible,
a:focus-visible {
    outline: 3px solid var(--accent-primary);
    outline-offset: 4px;
}