/* ===== DOCS PAGE STYLES ===== */

/* ---- Page Hero ---- */
.docs-hero {
    position: relative;
    margin: 80px 0 70px;
    padding: 60px 52px;
    background: var(--bg-panel);
    border: 1px solid rgba(0,212,255,0.12);
}

.docs-hero-inner {
    position: relative;
    z-index: 2;
}

.docs-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-code);
    font-size: 0.75rem;
    letter-spacing: 2px;
    color: var(--neon-cyan);
    margin-bottom: 24px;
    border: 1px solid rgba(0,212,255,0.22);
    padding: 5px 14px;
    background: rgba(0,212,255,0.04);
}

.docs-badge-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--neon-cyan);
    animation: blink 1.4s step-end infinite;
    box-shadow: 0 0 8px rgba(0,212,255,0.7);
}

.docs-hero-title {
    font-size: clamp(2rem, 5vw, 3rem);
    color: var(--text-bright);
    line-height: 1.2;
    margin-bottom: 18px;
}

.docs-hero-desc {
    font-size: 0.97rem;
    color: var(--text-body);
    max-width: 680px;
    line-height: 1.8;
    margin-bottom: 32px;
}

.docs-hero-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 18px;
    font-size: 0.78rem;
    color: var(--text-muted);
}

.docs-hero-meta .meta-item { display: flex; align-items: center; gap: 6px; }
.docs-hero-meta .meta-label { color: var(--text-muted); }
.docs-hero-meta .meta-item a { color: var(--neon-cyan); font-size: 0.78rem; }
.docs-hero-meta .meta-sep { color: var(--text-muted); opacity: 0.4; }

/* ---- HUD corners ---- */
.hud-border {
    position: absolute;
    width: 18px;
    height: 18px;
    border-color: rgba(0,212,255,0.4);
    border-style: solid;
}
.hud-tl { top: 0; left: 0; border-width: 2px 0 0 2px; }
.hud-tr { top: 0; right: 0; border-width: 2px 2px 0 0; }
.hud-bl { bottom: 0; left: 0; border-width: 0 0 2px 2px; }
.hud-br { bottom: 0; right: 0; border-width: 0 2px 2px 0; }

/* ---- Docs Layout ---- */
.docs-layout {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 48px;
    align-items: start;
    margin-bottom: 90px;
}

/* ---- Sidebar Nav ---- */
.docs-sidebar {
    position: sticky;
    top: 90px;
}

.sidebar-nav {
    list-style: none;
    border-left: 1px solid rgba(255,255,255,0.07);
    padding-left: 20px;
}

.sidebar-nav li {
    margin-bottom: 6px;
}

.sidebar-nav li a {
    font-size: 0.82rem;
    color: var(--text-muted);
    display: block;
    padding: 4px 0;
    transition: all 0.25s;
    font-family: var(--font-code);
    position: relative;
}

.sidebar-nav li a::before {
    content: '';
    position: absolute;
    left: -20px;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 1px;
    background: var(--neon-cyan);
    transition: width 0.25s;
}

.sidebar-nav li a:hover,
.sidebar-nav li a.active {
    color: var(--neon-cyan);
    text-shadow: none;
    padding-left: 4px;
}

.sidebar-nav li a:hover::before,
.sidebar-nav li a.active::before {
    width: 12px;
}

.sidebar-nav .nav-group {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--text-muted);
    opacity: 0.55;
    margin: 18px 0 8px;
}

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

.docs-content section {
    margin-bottom: 80px;
    scroll-margin-top: 90px;
}

/* ---- Quick Start Steps ---- */
.qs-steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 40px;
}

.qs-step {
    background: var(--bg-card);
    border: 1px solid rgba(255,255,255,0.06);
    padding: 28px 24px;
    position: relative;
    overflow: hidden;
}

.qs-step::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
}
.qs-step-1::before { background: linear-gradient(90deg, var(--neon-cyan), transparent); }
.qs-step-2::before { background: linear-gradient(90deg, var(--neon-green), transparent); }
.qs-step-3::before { background: linear-gradient(90deg, var(--neon-purple), transparent); }

.qs-num {
    font-family: var(--font-code);
    font-size: 2.2rem;
    font-weight: 700;
    line-height: 1;
    margin-bottom: 14px;
    opacity: 0.2;
}
.qs-step-1 .qs-num { color: var(--neon-cyan); }
.qs-step-2 .qs-num { color: var(--neon-green); }
.qs-step-3 .qs-num { color: var(--neon-purple); }

.qs-title {
    font-size: 1rem;
    color: var(--text-bright);
    margin-bottom: 10px;
    font-family: var(--font-code);
}

.qs-desc {
    font-size: 0.85rem;
    color: var(--text-body);
    line-height: 1.75;
}

/* ---- Platform Tabs ---- */
.platform-tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 0;
    flex-wrap: wrap;
}

.tab-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    font-family: var(--font-code);
    font-size: 0.82rem;
    color: var(--text-muted);
    background: rgba(255,255,255,0.02);
    border: 1px solid rgba(255,255,255,0.07);
    border-bottom: none;
    cursor: pointer;
    transition: all 0.25s;
    outline: none;
}

.tab-btn:hover {
    color: var(--neon-cyan);
    background: rgba(0,212,255,0.04);
    border-color: rgba(0,212,255,0.2);
}

.tab-btn.active {
    color: var(--neon-cyan);
    background: rgba(0,212,255,0.07);
    border-color: rgba(0,212,255,0.3);
    border-bottom: 1px solid rgba(0,212,255,0.07);
    position: relative;
    z-index: 1;
    margin-bottom: -1px;
}

.tab-panels {
    border: 1px solid rgba(0,212,255,0.15);
    background: var(--bg-card);
}

.tab-panel {
    display: none;
    padding: 36px 32px;
}

.tab-panel.active {
    display: block;
}

/* ---- Tutorial Steps ---- */
.tutorial-steps {
    list-style: none;
    counter-reset: step-counter;
}

.tutorial-step {
    counter-increment: step-counter;
    position: relative;
    padding: 0 0 32px 52px;
    border-left: 1px dashed rgba(255,255,255,0.08);
    margin-left: 16px;
}

.tutorial-step:last-child {
    border-left: none;
    padding-bottom: 0;
}

.tutorial-step::before {
    content: counter(step-counter, decimal-leading-zero);
    position: absolute;
    left: -16px;
    top: 0;
    width: 32px;
    height: 32px;
    background: var(--bg-base);
    border: 1px solid rgba(0,212,255,0.3);
    color: var(--neon-cyan);
    font-family: var(--font-code);
    font-size: 0.72rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.tutorial-step-title {
    font-size: 0.95rem;
    color: var(--text-bright);
    font-family: var(--font-code);
    margin-bottom: 8px;
}

.tutorial-step-body {
    font-size: 0.86rem;
    color: var(--text-body);
    line-height: 1.8;
}

.tutorial-step-body code {
    font-family: var(--font-code);
    font-size: 0.82rem;
    color: var(--neon-cyan);
    background: rgba(0,212,255,0.07);
    border: 1px solid rgba(0,212,255,0.18);
    padding: 1px 6px;
}

.tutorial-step-body strong {
    color: var(--text-bright);
    font-weight: 600;
}

/* ---- Terminal Block ---- */
.terminal-block {
    background: rgba(2,6,8,0.85);
    border: 1px solid rgba(0,212,255,0.15);
    padding: 20px 24px;
    margin: 16px 0;
    font-family: var(--font-code);
}

.tb-line {
    display: flex;
    gap: 12px;
    font-size: 0.82rem;
    padding: 2px 0;
}

.tb-prompt { color: var(--neon-green); flex-shrink: 0; }
.tb-cmd    { color: var(--text-bright); }
.tb-output { padding-left: 0; }
.tb-comment { color: var(--text-muted); font-size: 0.78rem; }

/* ---- Screenshot Placeholder ---- */
.screenshot-placeholder {
    background: rgba(0,212,255,0.03);
    border: 1px dashed rgba(0,212,255,0.2);
    border-radius: 2px;
    padding: 28px;
    text-align: center;
    margin: 18px 0;
    color: var(--text-muted);
    font-size: 0.82rem;
    font-family: var(--font-code);
}

/* ---- Config Block ---- */
.config-preview {
    background: rgba(2,6,8,0.85);
    border: 1px solid rgba(0,212,255,0.14);
    margin: 20px 0;
}

.config-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    background: rgba(0,212,255,0.04);
    border-bottom: 1px solid rgba(0,212,255,0.1);
}

.config-dots { display: flex; gap: 6px; }
.dot-red    { width: 10px; height: 10px; border-radius: 50%; background: #FF5F57; }
.dot-yellow { width: 10px; height: 10px; border-radius: 50%; background: #FEBC2E; }
.dot-green  { width: 10px; height: 10px; border-radius: 50%; background: #28C840; }

.config-filename {
    font-family: var(--font-code);
    font-size: 0.78rem;
    color: var(--text-muted);
}

.config-body {
    padding: 18px 20px;
    font-family: var(--font-code);
    font-size: 0.8rem;
    line-height: 1.9;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.yaml-key     { color: var(--neon-cyan); }
.yaml-value   { color: var(--neon-amber); }
.yaml-string  { color: var(--neon-green); }
.yaml-comment { color: var(--text-muted); }
.yaml-section { color: var(--neon-purple); font-weight: 600; }

/* ---- Info / Tip Box ---- */
.tip-box {
    border-left: 3px solid var(--neon-cyan);
    background: rgba(0,212,255,0.04);
    padding: 16px 20px;
    margin: 18px 0;
    font-size: 0.86rem;
    color: var(--text-body);
    line-height: 1.75;
}

.tip-box.tip-warn {
    border-left-color: var(--neon-amber);
    background: rgba(255,184,108,0.04);
}

.tip-box.tip-success {
    border-left-color: var(--neon-green);
    background: rgba(0,230,118,0.04);
}

.tip-label {
    font-family: var(--font-code);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 6px;
    display: block;
}

.tip-box .tip-label { color: var(--neon-cyan); }
.tip-box.tip-warn .tip-label { color: var(--neon-amber); }
.tip-box.tip-success .tip-label { color: var(--neon-green); }

.tip-box code {
    font-family: var(--font-code);
    font-size: 0.82rem;
    color: var(--neon-cyan);
    background: rgba(0,212,255,0.07);
    border: 1px solid rgba(0,212,255,0.18);
    padding: 1px 6px;
}

/* ---- Rules Table ---- */
.rules-table {
    width: 100%;
    border-collapse: collapse;
    font-family: var(--font-code);
    font-size: 0.82rem;
    margin: 20px 0;
}

.rules-table th {
    text-align: left;
    padding: 10px 16px;
    background: rgba(0,212,255,0.05);
    color: var(--neon-cyan);
    border: 1px solid rgba(0,212,255,0.12);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.rules-table td {
    padding: 10px 16px;
    border: 1px solid rgba(255,255,255,0.05);
    color: var(--text-body);
    vertical-align: top;
}

.rules-table tr:hover td {
    background: rgba(0,212,255,0.03);
}

.rules-table td code {
    color: var(--neon-green);
    background: rgba(0,230,118,0.07);
    border: 1px solid rgba(0,230,118,0.15);
    padding: 1px 6px;
    font-size: 0.79rem;
}

.rules-table td:first-child { color: var(--neon-amber); }

/* ---- FAQ ---- */
.faq-container { display: flex; flex-direction: column; gap: 2px; }

.faq-item {
    background: var(--bg-card);
    border: 1px solid rgba(255,255,255,0.055);
    overflow: hidden;
    transition: border-color 0.3s;
}

.faq-item:hover { border-color: rgba(0,212,255,0.2); }

.faq-q {
    padding: 18px 22px;
    cursor: pointer;
    display: flex;
    align-items: baseline;
    gap: 14px;
    font-size: 0.92rem;
    color: var(--text-bright);
    font-family: var(--font-code);
    user-select: none;
    position: relative;
}

.faq-q::after {
    content: '+';
    position: absolute;
    right: 22px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--neon-cyan);
    font-size: 1.2rem;
    transition: transform 0.3s;
}

.faq-item.open .faq-q::after {
    transform: translateY(-50%) rotate(45deg);
}

.faq-q-badge {
    font-size: 0.7rem;
    color: var(--neon-cyan);
    background: rgba(0,212,255,0.08);
    border: 1px solid rgba(0,212,255,0.2);
    padding: 2px 8px;
    white-space: nowrap;
    flex-shrink: 0;
}

.faq-a {
    display: none;
    padding: 0 22px 20px 22px;
    padding-left: calc(22px + 14px + 54px);
    font-size: 0.86rem;
    color: var(--text-body);
    line-height: 1.85;
    border-top: 1px solid rgba(255,255,255,0.04);
}

.faq-item.open .faq-a { display: block; }

.faq-a code {
    font-family: var(--font-code);
    font-size: 0.82rem;
    color: var(--neon-cyan);
    background: rgba(0,212,255,0.07);
    border: 1px solid rgba(0,212,255,0.18);
    padding: 1px 6px;
}

.faq-a a { color: var(--neon-cyan); }
.faq-a strong { color: var(--text-bright); }

/* ---- Protocol Badges ---- */
.protocol-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 20px 0;
}

.proto-badge {
    font-family: var(--font-code);
    font-size: 0.78rem;
    padding: 5px 14px;
    border: 1px solid;
}

.pb-ss     { color: var(--neon-cyan);   border-color: rgba(0,212,255,0.3);   background: rgba(0,212,255,0.06); }
.pb-vmess  { color: var(--neon-purple); border-color: rgba(189,147,249,0.3); background: rgba(189,147,249,0.06); }
.pb-trojan { color: var(--neon-amber);  border-color: rgba(255,184,108,0.3); background: rgba(255,184,108,0.06); }
.pb-wg     { color: var(--neon-green);  border-color: rgba(0,230,118,0.3);   background: rgba(0,230,118,0.06); }

/* ---- Section Intro ---- */
.section-intro {
    font-size: 0.93rem;
    color: var(--text-body);
    line-height: 1.85;
    max-width: 780px;
    margin-bottom: 28px;
}

.section-intro code {
    font-family: var(--font-code);
    font-size: 0.85rem;
    color: var(--neon-cyan);
    background: rgba(0,212,255,0.07);
    border: 1px solid rgba(0,212,255,0.18);
    padding: 1px 6px;
}

/* ---- Sub-section heading ---- */
.sub-heading {
    font-family: var(--font-code);
    font-size: 1rem;
    color: var(--neon-cyan);
    margin: 32px 0 14px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.sub-heading::before {
    content: '//';
    color: var(--text-muted);
    font-weight: 300;
    font-size: 0.85rem;
}

/* ---- Mobile TOC button ---- */
.docs-toc-btn {
    display: none;
    position: fixed;
    bottom: 24px;
    right: 20px;
    z-index: 990;
    align-items: center;
    gap: 7px;
    padding: 10px 16px;
    background: rgba(2, 7, 12, 0.94);
    border: 1px solid rgba(0,212,255,0.35);
    border-radius: 2px;
    color: var(--neon-cyan);
    font-family: var(--font-code);
    font-size: 0.82rem;
    cursor: pointer;
    box-shadow: 0 0 16px rgba(0,212,255,0.12), 0 4px 20px rgba(0,0,0,0.5);
    transition: border-color 0.2s, box-shadow 0.2s;
    backdrop-filter: blur(12px);
}
.docs-toc-btn:hover {
    border-color: var(--neon-cyan);
    box-shadow: 0 0 24px rgba(0,212,255,0.22), 0 4px 20px rgba(0,0,0,0.5);
}

/* Mobile TOC overlay */
.docs-toc-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.55);
    backdrop-filter: blur(2px);
    z-index: 996;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    pointer-events: none;
}
.docs-toc-overlay.open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

body.toc-open { overflow: hidden; }

/* ---- Responsive ---- */
@media (max-width: 860px) {
    .docs-layout {
        grid-template-columns: 1fr;
    }

    .docs-toc-btn { display: flex; }

    .docs-sidebar {
        display: block;
        position: fixed;
        top: 0;
        left: 0;
        width: min(280px, 80vw);
        height: 100dvh;
        background: rgba(2, 7, 12, 0.98);
        border-right: 1px solid rgba(0,212,255,0.15);
        z-index: 997;
        overflow-y: auto;
        overscroll-behavior: contain;
        padding: 24px 0 32px;
        transform: translateX(-100%);
        transition: transform 0.32s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .docs-sidebar.mobile-open {
        transform: translateX(0);
    }

    .qs-steps {
        grid-template-columns: 1fr;
    }

    .docs-hero {
        padding: 40px 24px;
        margin: 60px 0 50px;
    }

    .docs-hero-title {
        font-size: 1.8rem;
    }

    .tab-panel {
        padding: 24px 20px;
    }

    .rules-table {
        font-size: 0.75rem;
        display: block;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .rules-table th,
    .rules-table td {
        padding: 8px 10px;
    }
}

@media (max-width: 640px) {
    .platform-tabs {
        gap: 2px;
    }

    .tab-btn {
        padding: 8px 12px;
        font-size: 0.75rem;
    }

    .tab-btn .tab-icon {
        display: none;
    }
}