/* === Page Hero === */
.page-hero {
    background: linear-gradient(135deg, #0f0e24 0%, #1b1650 40%, #0e2448 75%, #0c1a30 100%);
    padding: 180px 0 100px;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.page-hero::before {
    content: '';
    position: absolute;
    top: -50%; left: -50%;
    width: 200%; height: 200%;
    background:
        radial-gradient(ellipse at 28% 48%, rgba(167, 139, 250, 0.26) 0%, transparent 52%),
        radial-gradient(ellipse at 72% 22%, rgba(96, 165, 250, 0.2) 0%, transparent 48%),
        radial-gradient(ellipse at 50% 85%, rgba(99, 102, 241, 0.12) 0%, transparent 42%);
}
.page-hero::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0;
    width: 100%; height: 140px;
    background: linear-gradient(to bottom, transparent 0%, rgba(12, 18, 32, 0.5) 100%);
    z-index: 0;
    pointer-events: none;
}
.page-hero-content { position: relative; z-index: 1; }
.page-hero h1 {
    color: #ffffff;
    font-size: 3.8rem;
    font-weight: 800;
    letter-spacing: -0.04em;
    margin-bottom: 20px;
    line-height: 1.1;
}
.page-hero p {
    color: rgba(255,255,255,0.72);
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto 40px;
    line-height: 1.7;
}
/* === Docs Layout === */
.docs-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 60px;
    padding: 80px 0 140px;
    align-items: start;
}

/* === Sidebar === */
.docs-sidebar {
    position: sticky;
    top: 100px;
}
.sidebar-nav {
    background: var(--color-white);
    border: 1.5px solid var(--color-border);
    border-radius: 20px;
    padding: 32px 28px;
    box-shadow: var(--shadow-sm);
}
.sidebar-section-title {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--color-grey-light);
    font-weight: 700;
    margin-bottom: 14px;
    margin-top: 28px;
    padding-left: 12px;
    font-family: var(--font-en);
}
.sidebar-section-title:first-child { margin-top: 0; }
.sidebar-nav ul { list-style: none; }
.sidebar-nav ul li a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 12px;
    border-radius: 10px;
    font-size: 0.9rem;
    color: var(--color-grey-dark);
    font-weight: 500;
    transition: var(--transition);
}
.sidebar-nav ul li a:hover,
.sidebar-nav ul li a.active {
    background: var(--color-brand-bg);
    color: var(--color-brand-dark);
}
.sidebar-nav ul li a i {
    width: 18px;
    text-align: center;
    font-size: 0.85rem;
    color: var(--color-grey-light);
}
.sidebar-nav ul li a:hover i,
.sidebar-nav ul li a.active i {
    color: var(--color-brand);
}

/* === Docs Content === */
.docs-content { min-width: 0; }

.doc-section {
    margin-bottom: 80px;
    scroll-margin-top: 100px;
}
.doc-section:last-child { margin-bottom: 0; }

.section-tag {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--color-grey-light);
    font-weight: 700;
    font-family: var(--font-en);
    margin-bottom: 16px;
    display: block;
}
.doc-section > h2 {
    font-size: 2.2rem;
    letter-spacing: -0.03em;
    margin-bottom: 20px;
    color: var(--color-black);
}
.doc-section > p {
    font-size: 1.05rem;
    color: var(--color-grey-dark);
    line-height: 1.8;
    margin-bottom: 32px;
}

/* === Step Cards === */
.doc-steps { display: flex; flex-direction: column; gap: 20px; margin-bottom: 40px; }
.doc-step {
    display: flex;
    gap: 24px;
    padding: 32px 36px;
    background: var(--color-white);
    border: 1.5px solid var(--color-border);
    border-radius: 20px;
    transition: var(--transition);
}
.doc-step:hover {
    box-shadow: var(--shadow-card);
    border-color: rgba(0,0,0,0.1);
}
.doc-step-num {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--color-brand-dark) 0%, var(--color-brand) 100%);
    color: var(--color-white);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-en);
    font-size: 1.2rem;
    font-weight: 800;
    flex-shrink: 0;
}
.doc-step-content h3 {
    font-size: 1.15rem;
    margin-bottom: 10px;
    letter-spacing: -0.01em;
}
.doc-step-content p {
    font-size: 0.95rem;
    color: var(--color-grey-dark);
    line-height: 1.7;
    margin: 0;
}

/* === Platform Cards Grid === */
.platform-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-bottom: 40px;
}
.platform-doc-card {
    background: var(--color-white);
    border: 1.5px solid var(--color-border);
    border-radius: 20px;
    padding: 32px;
    transition: var(--transition);
    cursor: pointer;
}
.platform-doc-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card);
    border-color: var(--color-brand);
}
.platform-doc-card-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
}
.platform-doc-icon {
    width: 52px; height: 52px;
    background: var(--color-brand-bg);
    border-radius: 14px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.5rem;
    color: var(--color-brand);
    border: 1px solid var(--color-brand-border);
}
.platform-doc-card h3 { font-size: 1.1rem; letter-spacing: -0.01em; }
.platform-doc-card p {
    font-size: 0.9rem;
    color: var(--color-grey-dark);
    line-height: 1.6;
    margin-bottom: 16px;
}
.doc-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--color-brand);
}

/* === Info Box === */
.info-box {
    padding: 24px 28px;
    border-radius: 16px;
    border-left: 4px solid;
    margin-bottom: 28px;
    font-size: 0.95rem;
    line-height: 1.7;
}
.info-box.tip {
    background: #f0fdf4;
    border-color: #22c55e;
    color: #166534;
}
.info-box.warning {
    background: #fffbeb;
    border-color: #f59e0b;
    color: #92400e;
}
.info-box.info {
    background: #eff6ff;
    border-color: #3b82f6;
    color: #1e3a5f;
}
.info-box strong { font-weight: 700; }
.info-box i { margin-right: 8px; }

/* === Code Block === */
.code-block {
    background: #1e1e2e;
    border-radius: 16px;
    padding: 28px 32px;
    margin-bottom: 28px;
    overflow-x: auto;
}
.code-block-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
    padding-bottom: 14px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
.code-block-title {
    font-size: 0.8rem;
    color: rgba(255,255,255,0.4);
    font-family: var(--font-en);
    letter-spacing: 0.5px;
    font-weight: 600;
}
.code-block pre {
    margin: 0;
    font-family: 'Courier New', 'Fira Code', monospace;
    font-size: 0.88rem;
    line-height: 1.8;
    color: #cdd6f4;
    white-space: pre;
    overflow-x: auto;
}
.code-comment { color: #6c7086; }
.code-key { color: #89b4fa; }
.code-value { color: #a6e3a1; }
.code-string { color: #f9e2af; }

/* === Tutorial Detail Section === */
.tutorial-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 40px;
}
.tutorial-card {
    background: var(--color-bg-light);
    border: 1.5px solid var(--color-border);
    border-radius: 16px;
    padding: 28px;
}
.tutorial-card h4 {
    font-size: 1.05rem;
    margin-bottom: 12px;
    letter-spacing: -0.01em;
}
.tutorial-card ul {
    list-style: none;
}
.tutorial-card ul li {
    font-size: 0.9rem;
    color: var(--color-grey-dark);
    padding: 6px 0;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: flex-start;
    gap: 10px;
    line-height: 1.5;
}
.tutorial-card ul li:last-child { border-bottom: none; }
.tutorial-card ul li i {
    color: #10b981;
    margin-top: 3px;
    flex-shrink: 0;
}
.tutorial-card ul li strong,
.tutorial-card ul li code {
    white-space: nowrap;
}

/* === Protocol Table === */
.protocol-table-wrap {
    margin-bottom: 32px;
}
.protocol-table {
    width: 100%;
    border-collapse: collapse;
    border-radius: 16px;
    overflow: hidden;
    border: 1.5px solid var(--color-border);
}
.protocol-table th {
    background: linear-gradient(135deg, var(--color-brand-dark) 0%, var(--color-brand) 100%);
    color: var(--color-white);
    padding: 16px 20px;
    text-align: left;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.5px;
}
.protocol-table td {
    padding: 14px 20px;
    font-size: 0.9rem;
    color: var(--color-grey-dark);
    border-bottom: 1px solid var(--color-border);
}
.protocol-table tr:last-child td { border-bottom: none; }
.protocol-table tr:nth-child(even) td { background: var(--color-bg-light); }
.badge-support {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 3px 10px;
    background: #d1fae5;
    color: #065f46;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}
.badge-meta {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 3px 10px;
    background: #dbeafe;
    color: #1e40af;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

/* === CTA Banner === */
.docs-cta {
    background: linear-gradient(135deg, #0f0e24 0%, #1b1650 60%, #0e2448 100%);
    border-radius: 24px;
    padding: 56px 56px;
    text-align: center;
    margin-top: 60px;
}
.docs-cta h2 {
    color: var(--color-white);
    font-size: 2rem;
    letter-spacing: -0.03em;
    margin-bottom: 16px;
}
.docs-cta p {
    color: rgba(255,255,255,0.5);
    font-size: 1rem;
    margin-bottom: 32px;
}
.docs-cta-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* === Responsive === */
@media (max-width: 1024px) {
    .docs-layout { grid-template-columns: 240px 1fr; gap: 40px; }
    .platform-cards { grid-template-columns: 1fr; }
    .tutorial-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
    .docs-layout { grid-template-columns: 1fr; }
    .docs-sidebar { position: static; display: none; }
    .page-hero h1 { font-size: 2.2rem; }
    .page-hero { padding: 140px 0 72px; }
    .doc-step { flex-direction: column; gap: 16px; padding: 24px; }
    .code-block { padding: 20px; }
    .docs-cta { padding: 40px 24px; }
    .docs-cta h2 { font-size: 1.6rem; }
    .docs-cta-btns { flex-direction: column; align-items: center; }
    .tutorial-grid { grid-template-columns: 1fr; }

    /* Protocol table: horizontally scrollable on mobile */
    .protocol-table-wrap {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        border-radius: 16px;
        border: 1.5px solid var(--color-border);
    }
    .protocol-table {
        border-radius: 0;
        border: none;
        min-width: 540px;
    }
    .protocol-table th { padding: 12px 14px; font-size: 0.8rem; white-space: nowrap; }
    .protocol-table td { padding: 12px 14px; font-size: 0.84rem; }
    .badge-support, .badge-meta { white-space: nowrap; }

    /* Section headings */
    .doc-section > h2 { font-size: 1.7rem; }
    .section-header h2 { font-size: 2rem; }
}
@media (max-width: 480px) {
    .page-hero h1 { font-size: 1.8rem; }
    .page-hero { padding: 120px 0 60px; }
    .doc-step { padding: 20px; }
    .doc-step-num { width: 40px; height: 40px; font-size: 1rem; border-radius: 12px; }
    .docs-layout { padding: 48px 0 80px; }
}