@import url('https://fonts.googleapis.com/css2?family=Epilogue:wght@400;500;600;700;800;900&family=Be+Vietnam+Pro:wght@400;500;600;700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&display=swap');

:root {
    --bg: #141317;
    --surface: #141317;
    --surface-container-lowest: #0e0e11;
    --surface-container-low: #1c1b1f;
    --surface-container: #201f23;
    --surface-container-high: #2b292d;
    --surface-container-highest: #353438;
    --primary: #e9ddff;
    --on-primary: #37265e;
    --primary-container: #d0bcff;
    --on-primary-container: #594983;
    --secondary: #ccc2dc;
    --on-secondary: #332d41;
    --secondary-container: #4a4359;
    --on-secondary-container: #bab1ca;
    --tertiary: #ffd9e3;
    --on-tertiary: #492532;
    --tertiary-container: #efb8c8;
    --on-tertiary-container: #704654;
    --on-surface: #e5e1e7;
    --on-surface-variant: #cac4d0;
    --outline: #948f9a;
    --outline-variant: #49454f;
    --border: rgba(255, 255, 255, 0.08);
    --shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 30px rgba(208, 188, 255, 0.25);
    --gradient-rainbow: linear-gradient(90deg, #d0bcff, #efb8c8, #ffb4ab, #ccc2dc);
}

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

html, body {
    font-family: 'Be Vietnam Pro', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--on-surface);
    scroll-behavior: smooth;
    overflow-x: hidden;
    line-height: 1.6;
}

a {
    color: inherit;
    text-decoration: none;
}

button, .btn, .dialog-icon-btn, .dialog-text-btn, .dialog-filled-btn, .screenshots-nav-button, .screenshots-preview-card {
    -webkit-user-select: none;
    user-select: none;
    cursor: pointer;
}

/* ═══════════════════════ PARTICLE BACKGROUND ═══════════════════════ */
.particle-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.particle {
    position: absolute;
    border-radius: 50%;
    filter: blur(90px);
    opacity: 0.15;
    animation: particleFloat 25s infinite alternate ease-in-out;
}

.particle-1 {
    width: 500px;
    height: 500px;
    top: -100px;
    left: -100px;
    background: var(--primary-container);
}

.particle-2 {
    width: 450px;
    height: 450px;
    top: 30%;
    right: -150px;
    background: var(--tertiary-container);
}

.particle-3 {
    width: 400px;
    height: 400px;
    bottom: -100px;
    left: 20%;
    background: var(--secondary-container);
}

.particle-4 {
    width: 350px;
    height: 350px;
    top: 65%;
    left: -100px;
    background: var(--primary-container);
}

.particle-5 {
    width: 300px;
    height: 300px;
    bottom: 10%;
    right: 10%;
    background: var(--tertiary-container);
}

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

/* ═══════════════════════ GLASS CARDS & EFFECTS ═══════════════════════ */
.glass-card {
    background: rgba(32, 31, 35, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    transition: all 0.3s ease;
}

.glass-card:hover {
    border-color: rgba(208, 188, 255, 0.25);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
}

.ambient-glow {
    box-shadow: 0 0 40px rgba(208, 188, 255, 0.15), 0 20px 40px rgba(0, 0, 0, 0.5);
}

.developer-chip {
    border: 1px solid var(--border);
    transition: transform 0.2s ease;
}
.developer-chip:hover {
    transform: translateY(-2px);
}

.feature-icon-wrap {
    width: 48px;
    height: 48px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
}

.feature-icon-wrap span {
    font-size: 24px;
}

/* ═══════════════════════ DIALOGS ═══════════════════════ */
.glass-dialog {
    background: rgba(28, 27, 31, 0.92);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--outline-variant);
    border-radius: 28px;
    color: var(--on-surface);
    padding: 0;
    max-width: 440px;
    width: 90%;
    margin: auto;
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.6);
}

.glass-dialog--large {
    max-width: 640px;
}

.glass-dialog::backdrop {
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
}

.dialog-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem 1.5rem 1rem;
    border-bottom: 1px solid var(--border);
}

.dialog-content {
    padding: 1.5rem;
}

.dialog-content--scroll {
    max-height: 450px;
    overflow-y: auto;
}

.dialog-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.5rem;
    padding: 1rem 1.5rem 1.5rem;
}

.dialog-icon-btn {
    background: transparent;
    border: none;
    color: var(--on-surface-variant);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s ease;
}

.dialog-icon-btn:hover {
    background: var(--surface-container-highest);
    color: var(--on-surface);
}

.dialog-list-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.8rem 1rem;
    border-radius: 16px;
    transition: background 0.2s ease;
    text-decoration: none;
}

.dialog-list-item:hover {
    background: var(--surface-container-high);
}

.dialog-text-btn {
    background: transparent;
    border: none;
    color: var(--primary);
    padding: 0.6rem 1.2rem;
    border-radius: 20px;
    font-weight: 500;
}

.dialog-filled-btn {
    background: var(--primary-container);
    color: var(--on-primary-container);
    border: none;
    padding: 0.6rem 1.4rem;
    border-radius: 20px;
    font-weight: 600;
}

.flag-icon {
    width: 24px;
    height: 18px;
    border-radius: 3px;
    object-fit: cover;
}

/* ═══════════════════════ SCREENSHOTS CAROUSEL ═══════════════════════ */
.screenshots-carousel-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 1024px) {
    .screenshots-carousel-layout {
        grid-template-columns: 1fr 340px;
    }
}

.screenshots-chip {
    background: var(--secondary-container);
    color: var(--on-secondary-container);
}

.screenshots-stage {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin: 1.5rem 0;
}

.screenshots-viewport {
    overflow: hidden;
    width: 100%;
    max-width: 320px;
    border-radius: 24px;
}

.screenshots-track {
    display: flex;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.screenshots-slide {
    min-width: 100%;
    display: flex;
    justify-content: center;
}

.screenshots-device-frame {
    width: 280px;
    height: 560px;
    border-radius: 32px;
    overflow: hidden;
    border: 4px solid var(--outline-variant);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
}

.screenshots-nav-button {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--surface-container-high);
    border: 1px solid var(--border);
    color: var(--on-surface);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.screenshots-nav-button:hover {
    background: var(--primary-container);
    color: var(--on-primary-container);
    transform: scale(1.1);
}

.screenshots-footer {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    margin-top: 1rem;
}

.screenshots-indicators {
    display: flex;
    gap: 0.5rem;
}

.screenshots-indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--outline-variant);
    cursor: pointer;
    transition: all 0.3s ease;
}

.screenshots-indicator.is-active {
    width: 24px;
    border-radius: 10px;
    background: var(--primary);
}

.screenshots-preview-rail {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.screenshots-preview-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    border-radius: 16px;
    background: var(--surface-container-low);
    border: 1px solid var(--border);
    transition: all 0.2s ease;
    text-align: left;
    width: 100%;
}

.screenshots-preview-card:hover, .screenshots-preview-card.is-active {
    background: var(--surface-container-high);
    border-color: var(--primary);
    transform: translateX(4px);
}

.screenshots-preview-thumb {
    width: 50px;
    height: 90px;
    border-radius: 8px;
    overflow: hidden;
    flex-shrink: 0;
}

/* Accordion Rotated Arrow */
#screenshots-icon.rotated {
    transform: rotate(180deg);
}

#screenshots-icon {
    transition: transform 0.3s ease;
}

/* ═══════════════════════ VERSION CHIPS & FOOTER CHIPS ═══════════════════════ */
.version-chip {
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    background: var(--surface-container-high);
    color: var(--on-surface-variant);
    border: 1px solid var(--border);
}

.version-chip--stable {
    background: var(--primary-container);
    color: var(--on-primary-container);
}

.footer-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.4rem 0.9rem;
    border-radius: 20px;
    font-size: 0.85rem;
    background: var(--surface-container);
    color: var(--on-surface-variant);
    border: 1px solid var(--border);
    transition: all 0.2s ease;
    text-decoration: none;
}

.footer-chip:hover {
    background: var(--surface-container-high);
    color: var(--primary);
    transform: translateY(-2px);
}

/* ═══════════════════════ LOADING INDICATORS ═══════════════════════ */
.loading-indicator {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
}

.circular-progress {
    width: 36px;
    height: 36px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    100% { transform: rotate(360deg); }
}

/* ═══════════════════════ LOGO PULSE ═══════════════════════ */
#logo.playing {
    animation: logoPulse 1.2s infinite ease-in-out;
    box-shadow: 0 0 30px #d0bcff;
}

@keyframes logoPulse {
    0% { transform: scale(1); box-shadow: 0 0 20px #d0bcff; }
    50% { transform: scale(1.1); box-shadow: 0 0 40px #d0bcff, 0 0 60px #efb8c8; }
    100% { transform: scale(1); box-shadow: 0 0 20px #d0bcff; }
}

/* Toast Notification */
.download-toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--surface-container-high);
    border: 1px solid var(--primary-container);
    color: var(--on-surface);
    padding: 0.8rem 1.6rem;
    border-radius: 30px;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 0.6rem;
    z-index: 9999;
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.download-toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}