@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@300;400;500;600;700&display=swap');

:root {
    --chrome-dark: #0c0c0e;
    --chrome-mid: #161618;
    --chrome-light: #222226;
    --silver: #a1a1aa;
    --silver-bright: #d4d4d8;
    --silver-shine: #fafafa;
    --text-main: #f4f4f5;
    --text-muted: #71717a;
    --line: #27272a;
}

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

body {
    font-family: 'IBM Plex Sans', sans-serif;
    background: var(--chrome-dark);
    color: var(--text-main);
    line-height: 1.7;
}

a {
    color: var(--silver-bright);
    text-decoration: none;
    transition: 0.25s;
}

a:hover {
    color: var(--silver-shine);
}

/* Header Bar */
.header-bar {
    position: fixed;
    top: 0;
    width: 100%;
    height: 65px;
    background: rgba(12, 12, 14, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--line);
    z-index: 800;
    display: flex;
    align-items: center;
}

.bar-inner {
    width: 100%;
    max-width: 1350px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand-text {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--silver), var(--silver-shine));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

.nav-items {
    display: flex;
    gap: 2rem;
}

.nav-items a {
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.9rem;
}

.nav-items a:hover,
.nav-items a.active {
    color: var(--silver-shine);
}

.menu-trigger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.menu-trigger span {
    width: 26px;
    height: 2px;
    background: var(--silver-bright);
}

.mobile-slide {
    position: fixed;
    inset: 0;
    background: rgba(12, 12, 14, 0.98);
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    z-index: 799;
}

.mobile-slide.visible {
    display: flex;
}

.mobile-slide a {
    font-size: 1.5rem;
    font-weight: 600;
}

/* Page Body */
.page-body {
    padding-top: 65px;
}

/* Intro */
.intro {
    min-height: calc(100vh - 65px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 4rem 2rem;
    background: 
        radial-gradient(circle at 50% 50%, rgba(161, 161, 170, 0.05) 0%, transparent 50%),
        var(--chrome-dark);
    text-align: center;
}

.intro-content {
    max-width: 850px;
}

.intro-content h1 {
    font-size: clamp(2.2rem, 5vw, 3.5rem);
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.15;
}

.intro-content h1 .shine {
    background: linear-gradient(135deg, var(--silver), var(--silver-shine));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.intro-content p {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 620px;
    margin: 0 auto 2.5rem;
}

.chrome-btn {
    display: inline-block;
    background: linear-gradient(135deg, var(--silver), var(--silver-bright));
    color: var(--chrome-dark);
    font-weight: 600;
    padding: 1rem 2.5rem;
    border-radius: 8px;
    transition: all 0.3s;
    box-shadow: 0 10px 30px rgba(161, 161, 170, 0.2);
}

.chrome-btn:hover {
    background: linear-gradient(135deg, var(--silver-bright), var(--silver-shine));
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(161, 161, 170, 0.3);
    color: var(--chrome-dark);
}

/* Boxes */
.boxes-section {
    padding: 5rem 2rem;
    background: var(--chrome-mid);
}

.boxes-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.box {
    background: var(--chrome-light);
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s;
}

.box:hover {
    border-color: var(--silver);
    transform: translateY(-4px);
}

.box .symbol {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.box h3 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--silver-shine);
}

.box p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Wheel Section */
.wheel-section {
    padding: 5rem 2rem;
}

.wheel-center {
    max-width: 1050px;
    margin: 0 auto;
    text-align: center;
}

.wheel-center h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 2rem;
    color: var(--silver-shine);
}

.wheel-box {
    width: 100%;
    aspect-ratio: 16/10;
    background: var(--chrome-mid);
    border: 1px solid var(--line);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.wheel-box iframe {
    width: 100%;
    height: 100%;
    border: none;
}

/* Document */
.document {
    max-width: 850px;
    margin: 0 auto;
    padding: 5rem 2rem;
}

.document h1 {
    font-size: 2.3rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 2.5rem;
    color: var(--silver-shine);
}

.document h2 {
    font-size: 1.35rem;
    font-weight: 600;
    color: var(--silver-bright);
    margin: 2rem 0 0.75rem;
}

.document p {
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.document ul {
    list-style: none;
    margin: 1.25rem 0;
}

.document li {
    padding: 0.5rem 0 0.5rem 1.5rem;
    color: var(--text-muted);
    position: relative;
}

.document li::before {
    content: '○';
    position: absolute;
    left: 0;
    color: var(--silver);
}

/* Page Footer */
.page-footer {
    background: var(--chrome-mid);
    border-top: 1px solid var(--line);
    padding: 3rem 2rem;
    text-align: center;
}

.footer-container {
    max-width: 1100px;
    margin: 0 auto;
}

.support-section {
    margin-bottom: 2rem;
}

.support-section h5 {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.support-section a {
    margin: 0 1rem;
    font-size: 0.9rem;
}

.nav-footer {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.nav-footer a {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.fine-print {
    color: var(--text-muted);
    font-size: 0.8rem;
    opacity: 0.7;
}

/* Age Screen */
.age-screen {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.97);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10000;
}

.age-screen.hidden {
    display: none;
}

.screen-box {
    background: var(--chrome-light);
    border: 2px solid var(--silver);
    border-radius: 14px;
    padding: 2.5rem;
    max-width: 450px;
    margin: 1rem;
    text-align: center;
}

.screen-box h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--silver-shine);
}

.screen-box p {
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.screen-btns {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.screen-btns button {
    padding: 0.9rem 2rem;
    border: none;
    border-radius: 8px;
    font-family: 'IBM Plex Sans', sans-serif;
    font-weight: 600;
    cursor: pointer;
    transition: 0.3s;
}

.btn-continue {
    background: linear-gradient(135deg, var(--silver), var(--silver-bright));
    color: var(--chrome-dark);
}

.btn-back {
    background: transparent;
    border: 1px solid var(--line) !important;
    color: var(--text-muted);
}

.btn-continue:hover {
    transform: scale(1.03);
}

.btn-back:hover {
    border-color: var(--silver) !important;
    color: var(--silver);
}

/* Responsive */
@media (max-width: 900px) {
    .boxes-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
    }
}

@media (max-width: 768px) {
    .nav-items {
        display: none;
    }
    
    .menu-trigger {
        display: flex;
    }
    
    .intro-content h1 {
        font-size: 1.8rem;
    }
    
    .wheel-box {
        aspect-ratio: 4/3;
    }
    
    .screen-btns {
        flex-direction: column;
    }
    
    .support-section a {
        display: block;
        margin: 0.5rem 0;
    }
}