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

.material-symbols-outlined {
    font-family: 'Material Symbols Outlined' !important;
    font-weight: normal;
    font-style: normal;
    font-size: 24px;
    display: inline-block;
    line-height: 1;
    text-transform: none;
    letter-spacing: normal;
    word-wrap: normal;
    white-space: nowrap;
    direction: ltr;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    -moz-osx-font-smoothing: grayscale;
    font-feature-settings: 'liga';
    vertical-align: middle;
    color: var(--active-accent);
}

h1, h2, h3, h4, h5, h6, .nav-brand-text, .btn, .feature-title, .feature-card-title, .section-title, .download-title, .feedback-title {
    font-family: 'Google Sans Flex', 'Google Sans', sans-serif;
}


:root {
    color-scheme: dark;
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: rgba(255, 255, 255, 0.03);
    --bg-card-hover: rgba(255, 255, 255, 0.06);
    --border-subtle: rgba(255, 255, 255, 0.06);
    --border-glow: var(--active-accent-border-glow);
    --text-primary: #f0eef5;
    --text-secondary: #8a8599;
    --text-muted: #5a5570;
    --code-bg: rgba(0, 0, 0, 0.4);
    --code-text: #f0eef5;
    
    /* Active Theme Variables - Initial App Teal */
    --active-accent: #57DEE3;
    --btn-primary-text: #0a0a0f;
    --active-accent-glow: rgba(87, 222, 227, 0.25);
    --active-accent-glow-hover: rgba(87, 222, 227, 0.35);
    --active-accent-bg-subtle: rgba(87, 222, 227, 0.12);
    --active-accent-bg-subtle-hover: rgba(87, 222, 227, 0.2);
    --active-accent-border-subtle: rgba(87, 222, 227, 0.2);
    --active-accent-border-glow: rgba(87, 222, 227, 0.25);
    
    --active-accent-orb-1: rgba(87, 222, 227, 0.15);
    --active-accent-orb-2: rgba(87, 222, 227, 0.10);
    --active-accent-orb-3: rgba(87, 222, 227, 0.08);
    
    --active-accent-card-start: rgba(87, 222, 227, 0.08);
    --active-accent-card-end: rgba(87, 222, 227, 0.02);

    --gradient-card: linear-gradient(135deg, var(--active-accent-card-start), var(--active-accent-card-end));
    --shadow-glow: 0 0 60px rgba(87, 222, 227, 0.08);
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;
}

/* Light Mode Disabled for now
@media (prefers-color-scheme: light) {
    :root {
        --bg-primary: #f5f5f7;
        --bg-secondary: #ffffff;
        --bg-card: rgba(0, 0, 0, 0.02);
        --bg-card-hover: rgba(0, 0, 0, 0.04);
        --border-subtle: rgba(0, 0, 0, 0.08);
        --text-primary: #1d1d1f;
        --text-secondary: #515154;
        --text-muted: #86868b;
        --code-bg: rgba(0, 0, 0, 0.05);
        --code-text: #1d1d1f;
        --active-accent: #008489;
        --btn-primary-text: #ffffff;
        --active-accent-glow: rgba(0, 132, 137, 0.25);
        --active-accent-glow-hover: rgba(0, 132, 137, 0.35);
        --active-accent-bg-subtle: rgba(0, 132, 137, 0.12);
        --active-accent-bg-subtle-hover: rgba(0, 132, 137, 0.2);
        --active-accent-border-subtle: rgba(0, 132, 137, 0.2);
        --active-accent-border-glow: rgba(0, 132, 137, 0.25);
        --active-accent-orb-1: rgba(0, 132, 137, 0.15);
        --active-accent-orb-2: rgba(0, 132, 137, 0.10);
        --active-accent-orb-3: rgba(0, 132, 137, 0.08);
        --active-accent-card-start: rgba(0, 132, 137, 0.08);
        --active-accent-card-end: rgba(0, 132, 137, 0.02);
        --shadow-glow: 0 20px 40px rgba(0, 0, 0, 0.05);
    }
}
*/

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

/* --- Background Effects --- */
.bg-gradient-orb {
    position: fixed;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.4;
    pointer-events: none;
    z-index: 0;
    transition: background 0.6s ease;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--active-accent-orb-1), transparent 70%);
    top: -200px;
    right: -100px;
}

.orb-2 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--active-accent-orb-2), transparent 70%);
    bottom: 10%;
    left: -150px;
}

.orb-3 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--active-accent-orb-3), transparent 70%);
    top: 50%;
    right: -100px;
}

/* --- Layout --- */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
    position: relative;
    z-index: 1;
}

/* --- Navigation --- */
.nav {
    padding: 20px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-primary);
}

.nav-brand-icon {
    width: 32px;
    height: 32px;
    border-radius: 6px;
}

.nav-brand-text {
    font-family: 'Google Sans Flex', 'Google Sans', sans-serif;
    font-weight: 700;
    font-size: 1.2rem;
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    gap: 8px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
}

.nav-link:hover {
    color: var(--text-primary);
    background: var(--bg-card-hover);
}

.nav-link--cta {
    background: var(--active-accent-bg-subtle);
    color: var(--active-accent);
    border: 1px solid var(--active-accent-border-subtle);
    transition: all 0.25s ease;
}

.nav-link--cta:hover {
    background: var(--active-accent-bg-subtle-hover);
    color: var(--active-accent);
}

/* --- Hero --- */
.hero {
    padding: 20px 0 80px;
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 60px;
    align-items: center;
    text-align: left;
}

.hero-content {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.hero-logo {
    width: 320px;
    max-width: 100%;
    height: auto;
    aspect-ratio: 1;
    border-radius: 22.5%;
    display: block;
    margin: 0 0 32px;
    filter: drop-shadow(0 0 80px rgba(168, 130, 255, 0.25));
}

@keyframes spin-slow {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.hero h1 {
    font-family: 'Google Sans Flex', 'Google Sans', sans-serif;
    font-size: clamp(2.2rem, 5vw, 3.8rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: 20px;
    cursor: pointer;
    user-select: none;
    transition: transform 0.2s ease;
}

.hero h1:hover {
    transform: scale(1.02);
}

.hero h1 .gradient-text {
    color: var(--active-accent);
    background: none;
    -webkit-text-fill-color: initial;
    background-clip: initial;
    transition: color 0.4s ease;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 520px;
    margin: 0 0 40px;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: 14px;
    justify-content: flex-start;
    flex-wrap: wrap;
}

.hero-video-container {
    display: flex;
    flex-direction: column;
    width: 100%;
}

.hero-video {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    background: #161621;
    border: none;
    box-shadow: none;
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

@media (hover: hover) {
    .hero-video:hover {
        transform: translateY(-2px);
        box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
    }
}

.hero-video video {
    width: 100%;
    height: auto;
    display: block;
    border-radius: inherit;
}

@media (min-width: 901px) {
    .hero-video-container {
        justify-self: end;
        max-height: 85vh;
        display: flex;
        flex-direction: column;
        justify-content: center;
    }
    .hero-video {
        max-height: 75vh;
        display: flex;
        width: fit-content;
    }
    .hero-video video {
        max-height: 75vh;
        width: auto;
        object-fit: contain;
    }
}

.video-caption {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 12px;
    text-align: left;
}

.video-caption a {
    color: var(--active-accent);
    text-decoration: none;
    transition: color 0.2s ease;
}

.video-caption a:hover {
    color: var(--text-primary);
    text-decoration: underline;
}


.video-controls {
    position: absolute;
    bottom: 16px;
    right: 16px;
    z-index: 10;
}

.video-control-btn {
    background: rgba(10, 10, 15, 0.6);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.82rem;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.video-control-btn:hover {
    background: rgba(10, 10, 15, 0.8);
    border-color: var(--active-accent);
    transform: scale(1.02);
}


.diagram-placeholder {
    background: transparent !important;
    border: none !important;
    box-shadow: none !important;
    aspect-ratio: auto !important;
}

.diagram-placeholder img {
    width: 100%;
    height: auto;
    display: block;
    position: relative;
    z-index: 2;
    padding: 0;
}


/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.25s ease;
    cursor: pointer;
    border: none;
    font-family: inherit;
}

.btn-primary {
    background: var(--active-accent);
    color: var(--btn-primary-text, #0a0a0f);
    box-shadow: 0 4px 20px var(--active-accent-glow);
    transition: all 0.25s ease;
}

.btn-primary .material-symbols-outlined {
    color: var(--btn-primary-text, #0a0a0f) !important;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--active-accent-glow-hover);
}

.btn-secondary {
    background: #161621;
    color: var(--text-primary);
    border: none;
    backdrop-filter: blur(10px);
}

.btn-secondary .material-symbols-outlined {
    color: var(--active-accent);
}

.btn-secondary:hover {
    background: #1c1c28;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
    transform: translateY(-2px);
}

.btn-icon {
    font-size: 1.25rem !important;
    line-height: 1;
}