:root {
    --bg: #0f172a;
    --bg-card: #1e293b;
    --bg-card-hover: #273548;
    --accent: #00AAEE;
    --accent-hover: #40D4FF;
    --success: #10b981;
    --error: #ef4444;
    --warning: #f59e0b;
    --text: #e2e8f0;
    --text-muted: #94a3b8;
    --border: #334155;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.6;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.container-sm { max-width: 480px; margin: 0 auto; padding: 0 20px; }

/* Navbar */
.navbar {
    background: var(--bg-card);
    border-bottom: none;
    padding: 16px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}
.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.navbar-brand {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent);
}
.navbar-links { display: flex; gap: 6px; align-items: center; }
.navbar-links a {
    color: var(--text-muted);
    font-size: 0.85rem;
    padding: 6px 14px;
    border-radius: 8px;
    transition: all 0.2s;
}
.navbar-links a:hover {
    color: var(--text);
    background: rgba(255,255,255,0.06);
}
.navbar-links a.active {
    color: var(--accent);
    background: rgba(0,170,238,0.12);
}
.navbar-links a.nav-logout {
    color: var(--error);
    opacity: 0.7;
}
.navbar-links a.nav-logout:hover {
    opacity: 1;
    background: rgba(239,68,68,0.1);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 24px;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    gap: 8px;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); color: #fff; }
.btn-success { background: var(--success); color: #fff; }
.btn-danger { background: var(--error); color: #fff; }
.btn-outline {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text);
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }
.btn-sm { padding: 6px 14px; font-size: 0.85rem; }
.btn-block { width: 100%; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* Cards */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 20px;
    transition: border-color 0.2s;
}
.card:hover { border-color: var(--accent); }
.card-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text);
}

/* Forms */
.form-group { margin-bottom: 16px; }
.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 0.9rem;
    color: var(--text-muted);
}
.form-control {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-size: 0.95rem;
    outline: none;
    transition: border-color 0.2s;
}
.form-control:focus { border-color: var(--accent); }
.form-control::placeholder { color: var(--text-muted); }

/* Alert */
.alert {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 16px;
    font-size: 0.9rem;
}
.alert-error { background: rgba(239,68,68,0.15); color: var(--error); border: 1px solid rgba(239,68,68,0.3); }
.alert-success { background: rgba(16,185,129,0.15); color: var(--success); border: 1px solid rgba(16,185,129,0.3); }

/* Table */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    font-size: 0.9rem;
}
th { color: var(--text-muted); font-weight: 600; }
tr:hover { background: rgba(0,170,238,0.05); }

/* Progress bar */
.progress {
    background: var(--bg);
    border-radius: 4px;
    height: 8px;
    overflow: hidden;
    width: 100%;
}
.progress-bar {
    height: 100%;
    border-radius: 4px;
    background: var(--accent);
    transition: width 0.3s;
}
.progress-bar.warning { background: var(--warning); }
.progress-bar.danger { background: var(--error); }

/* Status badge */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    gap: 4px;
}
.badge-active { background: rgba(16,185,129,0.15); color: var(--success); }
.badge-pending { background: rgba(245,158,11,0.15); color: var(--warning); }
.badge-error { background: rgba(239,68,68,0.15); color: var(--error); }
.badge-installing { background: rgba(0,170,238,0.15); color: var(--accent); }

/* Terminal log */
.terminal {
    background: #0a0a0a;
    border: 1px solid #333;
    border-radius: 8px;
    padding: 16px;
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
    color: #10b981;
    max-height: 400px;
    overflow-y: auto;
    line-height: 1.8;
}
.terminal .log-error { color: var(--error); }
.terminal .log-info { color: var(--text-muted); }

/* Tabs */
.tabs {
    display: flex;
    gap: 4px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 20px;
    overflow-x: auto;
}
.tab {
    padding: 10px 20px;
    cursor: pointer;
    color: var(--text-muted);
    border-bottom: 2px solid transparent;
    font-size: 0.9rem;
    white-space: nowrap;
    transition: all 0.2s;
    background: none;
    border-top: none;
    border-left: none;
    border-right: none;
}
.tab:hover { color: var(--text); }
.tab.active { color: var(--accent); border-bottom-color: var(--accent); }
.tab-content { display: none; }
.tab-content.active { display: block; }

/* Hero */
.hero {
    text-align: center;
    padding: 100px 0 60px;
}
.hero-badge {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 1px;
    background: rgba(0,170,238,0.15);
    color: var(--accent);
    border: 1px solid rgba(0,170,238,0.3);
    margin-bottom: 24px;
}
.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #fff 0%, var(--accent) 50%, #40D4FF 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1.2;
}
.hero p { color: var(--text-muted); font-size: 1.2rem; max-width: 550px; margin: 0 auto 40px; line-height: 1.7; }
.hero-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn-lg { padding: 14px 36px; font-size: 1.05rem; border-radius: 10px; }

/* Stats bar */
.stats-bar {
    display: flex;
    justify-content: center;
    gap: 48px;
    padding: 40px 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    margin-bottom: 20px;
}
.stat-item { text-align: center; }
.stat-number {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--accent);
    margin-bottom: 4px;
}
.stat-label { font-size: 0.85rem; color: var(--text-muted); }

/* Section title */
.section-title {
    text-align: center;
    margin-bottom: 32px;
    font-size: 1.5rem;
    font-weight: 700;
}

/* Features */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    padding: 40px 0;
}
.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 32px 24px;
    text-align: center;
    transition: border-color 0.2s, transform 0.2s;
}
.feature-card:hover { border-color: var(--accent); transform: translateY(-4px); }
.feature-icon-text {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    background: rgba(0,170,238,0.15);
    color: var(--accent);
    margin-bottom: 14px;
}

/* Platforms */
.platforms {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
}
.platform-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px 16px;
    text-align: center;
    transition: border-color 0.2s;
}
.platform-card:hover { border-color: var(--accent); }
.platform-name { font-weight: 600; margin-bottom: 4px; font-size: 1.05rem; }
.platform-app { color: var(--accent); font-weight: 600; font-size: 0.9rem; }

/* Setup guide cards */
.setup-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
    margin-bottom: 20px;
}
.setup-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 20px;
    transition: border-color 0.2s;
}
.setup-card:hover { border-color: var(--accent); }
.setup-platform {
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: 2px;
}
.setup-app {
    color: var(--accent);
    font-weight: 600;
    font-size: 0.85rem;
    margin-bottom: 14px;
}
.setup-steps { display: flex; flex-direction: column; gap: 8px; }
.setup-step {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.4;
}
.step-num {
    flex-shrink: 0;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: rgba(0,170,238,0.15);
    color: var(--accent);
    font-size: 0.75rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
}
.setup-buttons {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 14px;
}

/* VLESS link box */
.vless-link-box {
    display: flex;
    align-items: stretch;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
}
.vless-link-text {
    flex: 1;
    padding: 12px 14px;
    font-family: 'Courier New', monospace;
    font-size: 0.8rem;
    color: var(--text-muted);
    word-break: break-all;
    line-height: 1.4;
    user-select: all;
}
.vless-copy-btn {
    padding: 12px 20px;
    background: var(--accent);
    border: none;
    color: #fff;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    white-space: nowrap;
    transition: background 0.2s;
}
.vless-copy-btn:hover { background: var(--accent-hover); }

/* Copy box */
.copy-box {
    display: flex;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
}
.copy-box input {
    flex: 1;
    padding: 10px 14px;
    background: transparent;
    border: none;
    color: var(--text);
    font-size: 0.85rem;
    outline: none;
}
.copy-box button {
    padding: 10px 16px;
    background: var(--accent);
    border: none;
    color: #fff;
    cursor: pointer;
    font-size: 0.85rem;
}

/* Modal */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0,0,0,0.6);
    z-index: 200;
    justify-content: center;
    align-items: center;
}
.modal-overlay.active { display: flex; }
.modal {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 32px;
    width: 90%;
    max-width: 520px;
    max-height: 80vh;
    overflow-y: auto;
}
.modal-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 20px;
}

/* Grid helpers */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.mt-4 { margin-top: 16px; }
.mb-4 { margin-bottom: 16px; }
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.text-sm { font-size: 0.85rem; }
.hidden { display: none; }

/* Editable name */
.editable-name {
    cursor: pointer;
    border-bottom: 1px dashed var(--text-muted);
    padding-bottom: 1px;
    transition: all 0.2s;
}
.editable-name:hover {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

/* Platform selector */
.platform-selector {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}
.platform-btn {
    padding: 10px 20px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--bg);
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}
.platform-btn:hover {
    border-color: var(--accent);
    color: var(--text);
}
.platform-btn.active {
    background: rgba(0,170,238,0.15);
    border-color: var(--accent);
    color: var(--accent);
}
.platform-guide {
    animation: fadeIn 0.25s ease;
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* QR */
.qr-container { text-align: center; padding: 20px; }
.qr-container img { max-width: 200px; border-radius: 8px; }

/* PWA banner */
.pwa-banner {
    display: flex;
    align-items: center;
    gap: 16px;
    background: var(--bg-card);
    border: 1px solid var(--accent);
    border-radius: 12px;
    padding: 16px 20px;
    margin-bottom: 20px;
    box-shadow: 0 4px 20px rgba(0,170,238,0.15);
}
.pwa-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.4rem;
    cursor: pointer;
    padding: 0 4px;
    line-height: 1;
}
.pwa-close:hover { color: var(--text); }

.info-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px 24px;
}
.info-item {
    min-width: 0;
}
.info-item .text-sm {
    display: block;
    margin-bottom: 2px;
}

.plan-card {
    position: relative;
    background: var(--bg-card);
    border: 2px solid var(--border);
    border-radius: 12px;
    padding: 16px;
    cursor: pointer;
    text-align: center;
    transition: border-color 0.2s, box-shadow 0.2s;
}
.plan-card:hover { border-color: var(--accent); }
.plan-card.selected {
    border-color: var(--accent);
    box-shadow: 0 0 0 1px var(--accent), 0 4px 20px rgba(0,170,238,0.2);
}
.plan-card.popular { border-color: rgba(0,170,238,0.4); }

/* Renew pills */
.renew-pill {
    padding: 8px 16px;
    border-radius: 20px;
    border: 1px solid var(--border);
    background: var(--bg);
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}
.renew-pill:hover { border-color: var(--accent); color: var(--text); }
.renew-pill.selected {
    background: rgba(0,170,238,0.15);
    border-color: var(--accent);
    color: var(--accent);
}

/* Responsive */
@media (max-width: 768px) {
    .hero { padding: 60px 0 40px; }
    .hero h1 { font-size: 2rem; }
    .stats-bar { gap: 24px; padding: 24px 0; }
    .stat-number { font-size: 1.4rem; }
    .grid-2 { grid-template-columns: 1fr; }
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .info-grid { gap: 12px 16px; }
    .modal { padding: 20px; width: 95%; }
    th, td { padding: 8px 10px; font-size: 0.8rem; }
    .btn-lg { padding: 12px 28px; font-size: 0.95rem; }
    .plan-card { padding: 12px; }
    .plan-card div[style*="font-size:1.3rem"] { font-size: 1.1rem !important; }
    .container { padding: 0 12px; }

    /* Navbar: scrollable on mobile */
    .navbar-links {
        gap: 4px;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        flex-shrink: 1;
        min-width: 0;
    }
    .navbar-links::-webkit-scrollbar { display: none; }
    .navbar-links a {
        white-space: nowrap;
        padding: 5px 10px;
        font-size: 0.8rem;
    }
    .navbar-brand { flex-shrink: 0; }

    /* Flex-between stack on mobile */
    .flex-between {
        flex-direction: column;
        align-items: flex-start !important;
        gap: 12px;
    }

    /* Admin tables → card layout */
    .table-wrap table thead { display: none; }
    .table-wrap table,
    .table-wrap table tbody,
    .table-wrap table tr,
    .table-wrap table td {
        display: block;
        width: 100%;
    }
    .table-wrap table tr {
        padding: 14px;
        border-bottom: 1px solid var(--border);
    }
    .table-wrap table td {
        padding: 4px 0;
        font-size: 0.85rem;
        text-align: left;
    }
    .table-wrap table td:before {
        content: attr(data-label);
        font-weight: 600;
        color: var(--text-muted);
        font-size: 0.75rem;
        display: block;
        margin-bottom: 2px;
    }
    .table-wrap table td[style*="white-space"] {
        white-space: normal !important;
        display: flex;
        flex-wrap: wrap;
        gap: 6px;
        padding-top: 8px;
    }
}

@media (max-width: 400px) {
    .grid-4 { grid-template-columns: 1fr 1fr; gap: 8px; }
    .navbar-links a { padding: 4px 8px; font-size: 0.75rem; }
}