/* ===================================================
           docs.css — Tutorial / Documentation Page Styles
           =================================================== */

        /* --- Docs Hero --- */
        .docs-hero {
            padding: 160px 0 80px;
            background: linear-gradient(160deg, #f0fdf8 0%, #ffffff 50%, #f8fafc 100%);
            position: relative;
            overflow: hidden;
        }
        .docs-hero::before {
            content: '';
            position: absolute;
            top: -200px; right: -200px;
            width: 600px; height: 600px;
            background: radial-gradient(circle, rgba(16,185,129,0.08) 0%, transparent 70%);
            pointer-events: none;
        }
        .docs-hero::after {
            content: '';
            position: absolute;
            bottom: -100px; left: -100px;
            width: 400px; height: 400px;
            background: radial-gradient(circle, rgba(139,92,246,0.05) 0%, transparent 70%);
            pointer-events: none;
        }
        .docs-hero-inner {
            position: relative; z-index: 1;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        .docs-hero-text {}
        .docs-hero-title {
            font-size: clamp(32px, 5vw, 52px);
            font-weight: 700;
            color: var(--dark-deep);
            line-height: 1.1;
            letter-spacing: -1px;
            margin-bottom: 20px;
        }
        .docs-hero-title span { color: var(--brand-green); }
        .docs-hero-desc {
            font-size: 16px;
            color: var(--text-muted);
            line-height: 1.8;
            margin-bottom: 32px;
            font-weight: 300;
        }
        .docs-hero-chips {
            display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 36px;
        }
        .docs-chip {
            display: inline-flex; align-items: center; gap: 6px;
            padding: 6px 14px;
            background: #fff;
            border: 1px solid #e2e8f0;
            border-radius: 100px;
            font-size: 13px;
            color: var(--text-main);
            font-weight: 400;
        }
        .docs-chip i { color: var(--brand-green); font-size: 11px; }
        .docs-hero-cta { display: flex; gap: 12px; flex-wrap: wrap; }

        /* --- Platform Tab Navigation --- */
        .docs-platform-nav {
            background: #fff;
            border-bottom: 1px solid #e2e8f0;
            position: sticky;
            top: 0;
            z-index: 900;
            box-shadow: 0 2px 20px rgba(0,0,0,0.04);
        }
        .docs-platform-nav .container {
            display: flex;
            overflow-x: auto;
            gap: 0;
            scrollbar-width: none;
        }
        .docs-platform-nav .container::-webkit-scrollbar { display: none; }
        .docs-tab-btn {
            flex-shrink: 0;
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 16px 24px;
            border: none;
            background: transparent;
            color: var(--text-muted);
            font-size: 14px;
            font-weight: 500;
            cursor: pointer;
            border-bottom: 3px solid transparent;
            transition: 0.25s;
            font-family: 'Noto Sans SC', sans-serif;
            white-space: nowrap;
        }
        .docs-tab-btn i { font-size: 16px; }
        .docs-tab-btn:hover { color: var(--brand-green); background: var(--brand-green-light); }
        .docs-tab-btn.active {
            color: var(--brand-green);
            border-bottom-color: var(--brand-green);
            background: rgba(16,185,129,0.04);
            font-weight: 600;
        }

        /* --- Platform Sections --- */
        .docs-content { padding: 60px 0 80px; background: var(--bg-light); }
        .docs-section { display: none; }
        .docs-section.active { display: block; }

        /* --- Section Page Title --- */
        .docs-section-header {
            display: flex;
            align-items: flex-start;
            gap: 20px;
            margin-bottom: 48px;
            padding: 36px;
            background: #fff;
            border-radius: 24px;
            border: 1px solid #e2e8f0;
        }
        .docs-section-icon {
            width: 64px; height: 64px;
            border-radius: 18px;
            background: var(--brand-green-light);
            display: flex; align-items: center; justify-content: center;
            font-size: 28px;
            color: var(--brand-green);
            flex-shrink: 0;
        }
        .docs-section-title {
            font-size: 26px;
            font-weight: 700;
            color: var(--dark-deep);
            margin-bottom: 8px;
        }
        .docs-section-desc {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.7;
            font-weight: 300;
        }

        /* --- Client Selector (within tutorial) --- */
        .client-selector {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            margin-bottom: 40px;
        }
        .client-sel-btn {
            display: flex; align-items: center; gap: 8px;
            padding: 10px 20px;
            background: #fff;
            border: 2px solid #e2e8f0;
            border-radius: 12px;
            cursor: pointer;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-main);
            transition: 0.2s;
            font-family: 'Noto Sans SC', sans-serif;
        }
        .client-sel-btn:hover { border-color: var(--brand-green); color: var(--brand-green); }
        .client-sel-btn.active {
            border-color: var(--brand-green);
            background: var(--brand-green-light);
            color: var(--brand-green);
        }
        .client-sel-btn .sel-rec {
            font-size: 10px;
            background: var(--brand-green);
            color: #fff;
            padding: 2px 6px;
            border-radius: 100px;
            font-weight: 600;
        }

        /* --- Tutorial Steps --- */
        .tutorial-panel { display: none; }
        .tutorial-panel.active { display: block; }
        .tutorial-steps { position: relative; }
        .tutorial-steps::before {
            content: '';
            position: absolute;
            left: 28px; top: 28px; bottom: 28px;
            width: 2px;
            background: linear-gradient(180deg, var(--brand-green) 0%, #c7d2fe 100%);
            border-radius: 2px;
        }
        .step-item {
            display: flex;
            gap: 32px;
            margin-bottom: 32px;
            position: relative;
        }
        .step-item:last-child { margin-bottom: 0; }
        .step-num {
            flex-shrink: 0;
            width: 58px; height: 58px;
            border-radius: 50%;
            background: var(--brand-green);
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            font-family: var(--font-en);
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative; z-index: 1;
            box-shadow: 0 0 0 5px var(--brand-green-light), 0 8px 24px var(--brand-green-glow);
        }
        .step-num.orange { background: var(--accent-orange); box-shadow: 0 0 0 5px rgba(245,158,11,0.1), 0 8px 24px rgba(245,158,11,0.3); }
        .step-num.purple { background: var(--accent-purple); box-shadow: 0 0 0 5px rgba(139,92,246,0.1), 0 8px 24px rgba(139,92,246,0.3); }
        .step-num.teal {
            background: #0ea5e9;
            box-shadow: 0 0 0 5px rgba(14,165,233,0.1), 0 8px 24px rgba(14,165,233,0.3);
        }
        .step-body {
            flex: 1;
            background: #fff;
            border-radius: 20px;
            padding: 28px 32px;
            border: 1px solid #e2e8f0;
            transition: 0.3s;
            margin-top: 4px;
        }
        .step-body:hover { border-color: rgba(16,185,129,0.35); box-shadow: 0 6px 24px rgba(16,185,129,0.07); }
        .step-body h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--dark-deep);
            margin-bottom: 10px;
        }
        .step-body p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.9;
            margin-bottom: 12px;
            font-weight: 300;
        }
        .step-body p:last-child { margin-bottom: 0; }

        /* --- Code/Command Block --- */
        .step-code {
            background: #0d1929;
            border-radius: 12px;
            padding: 16px 20px;
            font-family: 'Courier New', monospace;
            font-size: 13px;
            color: #10b981;
            line-height: 1.8;
            margin-top: 12px;
            margin-bottom: 12px;
            overflow-x: auto;
            border: 1px solid rgba(16,185,129,0.15);
        }
        .step-code .cmd-comment { color: #475569; }
        .step-code .cmd-key { color: #94a3b8; }
        .step-code .cmd-val { color: #f59e0b; }

        /* --- Step Tip --- */
        .step-tip {
            display: flex; align-items: flex-start; gap: 10px;
            background: var(--brand-green-light);
            border-left: 3px solid var(--brand-green);
            border-radius: 0 12px 12px 0;
            padding: 12px 16px;
            font-size: 13px;
            color: #065f46;
            line-height: 1.7;
            margin-top: 12px;
            font-weight: 400;
        }
        .step-tip.orange {
            background: rgba(245,158,11,0.08);
            border-color: var(--accent-orange);
            color: #92400e;
        }
        .step-tip.purple {
            background: rgba(139,92,246,0.08);
            border-color: var(--accent-purple);
            color: #4c1d95;
        }
        .step-tip.blue {
            background: rgba(14,165,233,0.08);
            border-color: #0ea5e9;
            color: #0c4a6e;
        }
        .step-tip i { font-size: 14px; flex-shrink: 0; margin-top: 2px; color: var(--brand-green); }
        .step-tip.orange i { color: var(--accent-orange); }
        .step-tip.purple i { color: var(--accent-purple); }
        .step-tip.blue i { color: #0ea5e9; }

        /* --- Step Screenshot Placeholder --- */
        .step-screenshot {
            background: var(--dark-deep);
            border-radius: 14px;
            padding: 20px;
            margin-top: 14px;
            display: flex;
            flex-direction: column;
            gap: 8px;
            border: 1px solid rgba(255,255,255,0.06);
        }
        .ss-titlebar {
            display: flex; gap: 6px; align-items: center; margin-bottom: 4px;
        }
        .ss-dot { width: 10px; height: 10px; border-radius: 50%; }
        .ss-dot-r { background: #ff5f57; }
        .ss-dot-y { background: #ffbd2e; }
        .ss-dot-g { background: #28ca41; }
        .ss-win-title { font-size: 12px; color: rgba(255,255,255,0.4); margin-left: 8px; font-family: var(--font-en); }
        .ss-row {
            display: flex; align-items: center; justify-content: space-between;
            background: rgba(255,255,255,0.04);
            border-radius: 8px;
            padding: 10px 14px;
            border: 1px solid rgba(255,255,255,0.05);
        }
        .ss-row-label { font-size: 12px; color: rgba(255,255,255,0.7); font-family: var(--font-en); }
        .ss-row-value { font-size: 12px; color: var(--brand-green); font-weight: 600; font-family: var(--font-en); }
        .ss-row-toggle {
            width: 34px; height: 18px;
            background: var(--brand-green);
            border-radius: 100px;
            position: relative;
        }
        .ss-row-toggle::after {
            content: ''; position: absolute;
            right: 2px; top: 2px;
            width: 14px; height: 14px;
            background: #fff;
            border-radius: 50%;
        }

        /* --- Download Call within tutorial --- */
        .step-dl-btn {
            display: inline-flex; align-items: center; gap: 10px;
            padding: 12px 22px;
            background: var(--brand-green);
            color: #fff;
            text-decoration: none;
            border-radius: 12px;
            font-size: 14px;
            font-weight: 600;
            transition: 0.3s;
            margin-top: 12px;
        }
        .step-dl-btn:hover { background: #059669; transform: translateY(-2px); box-shadow: 0 8px 24px var(--brand-green-glow); }
        .step-dl-btn.secondary {
            background: transparent;
            border: 2px solid var(--brand-green);
            color: var(--brand-green);
        }
        .step-dl-btn.secondary:hover { background: var(--brand-green); color: #fff; }

        /* --- iOS Special Cards --- */
        .ios-app-cards {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin-bottom: 40px;
        }
        .ios-app-card {
            background: #fff;
            border-radius: 20px;
            padding: 24px;
            border: 2px solid #e2e8f0;
            transition: 0.3s;
        }
        .ios-app-card.featured { border-color: var(--accent-purple); background: rgba(139,92,246,0.02); }
        .ios-app-card:hover { transform: translateY(-4px); box-shadow: 0 12px 40px rgba(0,0,0,0.08); }
        .ios-app-header {
            display: flex; align-items: center; gap: 14px;
            margin-bottom: 14px;
        }
        .ios-app-icon {
            width: 52px; height: 52px;
            border-radius: 14px;
            display: flex; align-items: center; justify-content: center;
            font-size: 22px;
            background: linear-gradient(135deg, #a78bfa, #7c3aed);
            color: #fff;
        }
        .ios-app-name { font-size: 17px; font-weight: 600; color: var(--dark-deep); }
        .ios-app-sub { font-size: 12px; color: var(--text-muted); margin-top: 2px; }
        .ios-app-desc { font-size: 13px; color: var(--text-muted); line-height: 1.8; margin-bottom: 14px; font-weight: 300; }
        .ios-app-btn {
            display: flex; align-items: center; gap: 8px;
            padding: 10px 18px;
            background: #000;
            color: #fff;
            text-decoration: none;
            border-radius: 10px;
            font-size: 13px;
            font-weight: 600;
            width: fit-content;
            transition: 0.3s;
        }
        .ios-app-btn:hover { background: #1a1a1a; transform: translateY(-1px); }

        /* --- Common Config Section --- */
        .docs-common {
            padding: 80px 0;
            background: var(--dark-deep);
        }
        .docs-common .section-title { color: #fff; }
        .docs-common .section-desc { color: #94a3b8; }
        .config-panels {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
            margin-top: 48px;
        }
        .config-panel {
            background: rgba(255,255,255,0.03);
            border: 1px solid rgba(255,255,255,0.08);
            border-radius: 24px;
            padding: 36px;
            transition: 0.3s;
        }
        .config-panel:hover { border-color: rgba(16,185,129,0.3); background: rgba(16,185,129,0.03); }
        .config-panel-icon {
            width: 52px; height: 52px;
            border-radius: 14px;
            background: rgba(16,185,129,0.12);
            display: flex; align-items: center; justify-content: center;
            font-size: 22px;
            color: var(--brand-green);
            margin-bottom: 20px;
        }
        .config-panel h3 {
            font-size: 20px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 10px;
        }
        .config-panel p {
            font-size: 14px;
            color: #94a3b8;
            line-height: 1.8;
            margin-bottom: 20px;
            font-weight: 300;
        }
        .config-steps-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .config-steps-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 13px;
            color: rgba(255,255,255,0.75);
            line-height: 1.7;
        }
        .config-step-num {
            flex-shrink: 0;
            width: 22px; height: 22px;
            border-radius: 50%;
            background: var(--brand-green);
            color: #fff;
            font-size: 11px;
            font-weight: 700;
            display: flex; align-items: center; justify-content: center;
            margin-top: 1px;
        }
        .config-code-block {
            background: rgba(0,0,0,0.5);
            border-radius: 14px;
            padding: 18px 20px;
            font-family: monospace;
            font-size: 12px;
            color: #10b981;
            line-height: 2;
            border: 1px solid rgba(16,185,129,0.15);
            overflow-x: auto;
            margin-top: 16px;
        }
        .config-code-block .ck { color: #94a3b8; }
        .config-code-block .cv { color: #f59e0b; }
        .config-code-block .cs { color: #a78bfa; }
        .config-code-block .cc { color: #475569; }

        /* --- Troubleshooting FAQ Section --- */
        .docs-faq { padding: 80px 0; background: #fff; }
        .faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 48px; align-items: start; }
        .faq-col { display: flex; flex-direction: column; gap: 20px; }
        .faq-card {
            background: var(--bg-light);
            border-radius: 20px;
            border: 1px solid #e2e8f0;
            overflow: hidden;
            transition: 0.3s;
        }
        .faq-card:hover { border-color: rgba(16,185,129,0.3); }
        .faq-card-q {
            display: flex; align-items: center; justify-content: space-between;
            padding: 22px 24px;
            cursor: pointer;
            gap: 12px;
        }
        .faq-card-q-text {
            font-size: 15px;
            font-weight: 500;
            color: var(--dark-deep);
            line-height: 1.5;
        }
        .faq-card-arrow {
            flex-shrink: 0;
            width: 28px; height: 28px;
            border-radius: 50%;
            background: var(--brand-green-light);
            display: flex; align-items: center; justify-content: center;
            color: var(--brand-green);
            font-size: 12px;
            transition: 0.25s;
        }
        .faq-card.open .faq-card-arrow { transform: rotate(180deg); background: var(--brand-green); color: #fff; }
        .faq-card-a {
            display: none;
            padding: 0 24px 22px;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.9;
            font-weight: 300;
        }
        .faq-card.open .faq-card-a { display: block; }
        .faq-card-a code {
            background: rgba(16,185,129,0.08);
            padding: 2px 8px;
            border-radius: 6px;
            font-size: 12px;
            color: #065f46;
            font-family: monospace;
        }

        /* --- CTA Banner --- */
        .docs-cta {
            padding: 80px 0;
            background: linear-gradient(135deg, var(--dark-deep) 0%, #0a1628 100%);
            text-align: center;
        }
        .docs-cta h2 {
            font-size: clamp(24px, 4vw, 36px);
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }
        .docs-cta p {
            font-size: 16px;
            color: #94a3b8;
            margin-bottom: 32px;
            font-weight: 300;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.7;
        }
        .docs-cta-btns { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
        .docs-cta-btn-main {
            padding: 14px 32px;
            background: var(--brand-green);
            color: #fff;
            text-decoration: none;
            border-radius: 100px;
            font-size: 15px;
            font-weight: 600;
            transition: 0.3s;
            display: inline-flex; align-items: center; gap: 8px;
        }
        .docs-cta-btn-main:hover { background: #059669; transform: translateY(-2px); box-shadow: 0 12px 32px var(--brand-green-glow); }
        .docs-cta-btn-ghost {
            padding: 14px 32px;
            background: transparent;
            color: rgba(255,255,255,0.75);
            text-decoration: none;
            border-radius: 100px;
            font-size: 15px;
            font-weight: 500;
            transition: 0.3s;
            border: 1px solid rgba(255,255,255,0.15);
            display: inline-flex; align-items: center; gap: 8px;
        }
        .docs-cta-btn-ghost:hover { border-color: rgba(255,255,255,0.4); color: #fff; }

        /* --- Hero right visual (terminal) --- */
        .docs-hero-visual {
            background: var(--dark-deep);
            border-radius: 24px;
            padding: 24px;
            border: 1px solid rgba(255,255,255,0.08);
            box-shadow: 0 40px 80px rgba(0,0,0,0.2);
        }
        .dv-titlebar {
            display: flex; align-items: center; gap: 6px; margin-bottom: 20px;
        }
        .dv-dot { width: 12px; height: 12px; border-radius: 50%; }
        .dv-dot-r { background: #ff5f57; }
        .dv-dot-y { background: #ffbd2e; }
        .dv-dot-g { background: #28ca41; }
        .dv-title { font-size: 13px; color: rgba(255,255,255,0.35); margin-left: 8px; font-family: var(--font-en); }
        .dv-steps {
            display: flex; flex-direction: column; gap: 16px;
        }
        .dv-step {
            display: flex; align-items: flex-start; gap: 14px;
            padding: 14px 16px;
            background: rgba(255,255,255,0.03);
            border-radius: 14px;
            border: 1px solid rgba(255,255,255,0.05);
        }
        .dv-step-num {
            width: 28px; height: 28px;
            border-radius: 50%;
            background: var(--brand-green);
            color: #fff;
            font-size: 12px;
            font-weight: 700;
            display: flex; align-items: center; justify-content: center;
            flex-shrink: 0;
            font-family: var(--font-en);
        }
        .dv-step-num.done { background: rgba(16,185,129,0.2); color: var(--brand-green); }
        .dv-step-info {}
        .dv-step-title { font-size: 13px; font-weight: 500; color: rgba(255,255,255,0.85); margin-bottom: 2px; }
        .dv-step-sub { font-size: 11px; color: #475569; }
        .dv-step-icon { margin-left: auto; color: var(--brand-green); font-size: 14px; }

        /* --- Mobile nav hamburger visible on small screens --- */
        .mobile-menu-btn { display: none; }

        /* ===================================================
           Responsive Breakpoints
           =================================================== */
        @media (max-width: 1024px) {
            .docs-hero-inner { grid-template-columns: 1fr; gap: 40px; }
            .docs-hero-visual { display: none; }
            .config-panels { grid-template-columns: 1fr; }
            .faq-grid { grid-template-columns: 1fr; }
            .faq-col { gap: 16px; }
            .ios-app-cards { grid-template-columns: 1fr; }
        }

        @media (max-width: 768px) {
            .docs-hero { padding: 120px 0 60px; }
            .docs-hero-title { font-size: 32px; }
            .docs-tab-btn { padding: 14px 16px; font-size: 13px; }
            .docs-section-header { flex-direction: column; gap: 14px; }
            .step-item { gap: 16px; }
            .step-body { padding: 20px; }
            .tutorial-steps::before { left: 22px; }
            .step-num { width: 46px; height: 46px; font-size: 16px; }
            .docs-content { padding: 40px 0 60px; }
        }

        @media (max-width: 540px) {
            .client-selector { gap: 8px; }
            .client-sel-btn { padding: 8px 14px; font-size: 13px; }
            .step-body h3 { font-size: 16px; }
        }