/* ============================================
   Thảo Nguyên Trading — Premium Dark Theme
   ============================================ */

/* === CSS Custom Properties === */
:root {
    --bg-primary: #0a0e17;
    --bg-secondary: #111827;
    --bg-card: rgba(255, 255, 255, 0.04);
    --bg-card-hover: rgba(255, 255, 255, 0.08);
    --bg-glass: rgba(255, 255, 255, 0.06);

    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --buy: #00d4aa;
    --buy-bg: rgba(0, 212, 170, 0.12);
    --buy-glow: rgba(0, 212, 170, 0.3);
    --sell: #ff4757;
    --sell-bg: rgba(255, 71, 87, 0.12);
    --sell-glow: rgba(255, 71, 87, 0.3);
    --sideway: #ffa502;
    --sideway-bg: rgba(255, 165, 2, 0.12);
    --sideway-glow: rgba(255, 165, 2, 0.3);

    --accent: #6366f1;
    --accent-hover: #818cf8;
    --accent-bg: rgba(99, 102, 241, 0.12);

    --border: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.15);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;

    --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.4);

    --transition: all 0.3s ease;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

/* === Reset & Base === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: var(--font);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: radial-gradient(ellipse at 20% 0%, rgba(99, 102, 241, 0.08) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 100%, rgba(0, 212, 170, 0.05) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

/* === Header === */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    background: rgba(10, 14, 23, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

.header-left { display: flex; align-items: center; gap: 12px; }

.logo { display: flex; align-items: center; gap: 12px; }
.logo-icon { font-size: 32px; filter: drop-shadow(0 0 8px rgba(99, 102, 241, 0.5)); }
.logo-text h1 {
    font-size: 20px;
    font-weight: 700;
    background: linear-gradient(135deg, #e2e8f0, #6366f1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.logo-subtitle { font-size: 11px; color: var(--text-muted); letter-spacing: 1px; text-transform: uppercase; }

.header-right { display: flex; align-items: center; gap: 20px; }

.status-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-secondary);
}
.status-dot {
    width: 8px; height: 8px;
    border-radius: 50%;
    background: var(--sideway);
    animation: pulse 2s infinite;
}
.status-dot.online { background: var(--buy); }
.status-dot.error { background: var(--sell); animation: none; }

.last-update {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--text-muted);
}

/* === Navigation Tabs === */
.nav-tabs {
    display: flex;
    gap: 4px;
    padding: 12px 24px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    position: relative;
    z-index: 1;
}

.tab-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-family: var(--font);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.tab-btn:hover {
    background: var(--bg-card);
    color: var(--text-primary);
}

.tab-btn.active {
    background: var(--accent-bg);
    color: var(--accent-hover);
    box-shadow: inset 0 -2px 0 var(--accent);
}

.tab-icon { font-size: 16px; }

/* === Main Content === */
.main-content {
    position: relative;
    z-index: 1;
    max-width: 1400px;
    margin: 0 auto;
    padding: 24px;
}

.tab-content { display: none; animation: fadeIn 0.3s ease; }
.tab-content.active { display: block; }

@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

/* === Filter Bar === */
.filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.filter-btn {
    padding: 8px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    color: var(--text-secondary);
    font-family: var(--font);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    color: var(--text-primary);
}

.filter-btn.active {
    background: var(--accent-bg);
    border-color: var(--accent);
    color: var(--accent-hover);
}

/* === Signal Table === */
.table-container {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.signal-table {
    width: 100%;
    border-collapse: collapse;
}

.signal-table thead th {
    padding: 14px 20px;
    text-align: left;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    background: rgba(0, 0, 0, 0.2);
    border-bottom: 1px solid var(--border);
}

.signal-table tbody tr {
    cursor: pointer;
    transition: var(--transition);
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.signal-table tbody tr:hover {
    background: var(--bg-card-hover);
}

.signal-table tbody tr:last-child { border-bottom: none; }

.signal-table td {
    padding: 14px 20px;
    font-size: 14px;
    vertical-align: middle;
}

.symbol-cell {
    display: flex;
    align-items: center;
    gap: 10px;
}

.symbol-emoji { font-size: 20px; }
.symbol-name { font-weight: 600; color: var(--text-primary); }
.symbol-display { font-size: 12px; color: var(--text-muted); }

.category-badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: var(--radius-xl);
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.category-badge.forex { background: rgba(99, 102, 241, 0.15); color: #818cf8; }
.category-badge.metal { background: rgba(251, 191, 36, 0.15); color: #fbbf24; }
.category-badge.crypto { background: rgba(168, 85, 247, 0.15); color: #a855f7; }
.category-badge.energy { background: rgba(239, 68, 68, 0.15); color: #ef4444; }

/* === Signal Badges === */
.signal-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: var(--radius-xl);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    transition: var(--transition);
}

.signal-badge.buy {
    background: var(--buy-bg);
    color: var(--buy);
    box-shadow: 0 0 12px var(--buy-glow);
}
.signal-badge.sell {
    background: var(--sell-bg);
    color: var(--sell);
    box-shadow: 0 0 12px var(--sell-glow);
}
.signal-badge.sideway {
    background: var(--sideway-bg);
    color: var(--sideway);
    box-shadow: 0 0 12px var(--sideway-glow);
}
.signal-badge.none {
    background: rgba(100, 116, 139, 0.1);
    color: var(--text-muted);
}

/* === Signal Cell Container & Evaluation Badges === */
.signal-cell-container {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
}

.eval-badge {
    display: inline-flex;
    align-items: center;
    font-size: 10px;
    font-weight: 600;
    padding: 2px 6px;
    border-radius: 4px;
    letter-spacing: 0.3px;
    text-transform: uppercase;
}

.eval-badge.eval-strong {
    background: rgba(0, 212, 170, 0.08);
    color: var(--buy);
}

.eval-badge.eval-weak {
    background: rgba(255, 71, 87, 0.08);
    color: var(--sell);
}

.eval-badge.eval-volatile {
    background: rgba(99, 102, 241, 0.08);
    color: #818cf8;
}

.eval-badge.eval-squeeze {
    background: rgba(255, 165, 2, 0.08);
    color: var(--sideway);
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

@keyframes glowPulse {
    0%, 100% { box-shadow: 0 0 12px var(--buy-glow); }
    50% { box-shadow: 0 0 20px var(--buy-glow), 0 0 30px var(--buy-glow); }
}

.signal-badge.buy.fresh { animation: glowPulse 2s infinite; }

/* === Loading & Empty States === */
.loading-state, .empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    color: var(--text-muted);
}

.spinner {
    width: 40px; height: 40px;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-bottom: 16px;
}

@keyframes spin { to { transform: rotate(360deg); } }

.empty-icon { font-size: 48px; margin-bottom: 12px; }

/* === Cards === */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    backdrop-filter: blur(10px);
    transition: var(--transition);
}

.card:hover { border-color: var(--border-hover); }

.card-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-primary);
}

/* === Forms === */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-bottom: 20px;
}

.form-group { display: flex; flex-direction: column; gap: 6px; }

.form-group label {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
}

.form-input {
    padding: 12px 16px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font);
    font-size: 14px;
    transition: var(--transition);
    outline: none;
}

.form-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-bg);
}

.form-input::placeholder { color: var(--text-muted); }

select.form-input { cursor: pointer; }

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), #4f46e5);
    color: white;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

.btn-primary:active { transform: translateY(0); }

/* === Calculator === */
.calc-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.result-grid {
    display: grid;
    gap: 16px;
}

.result-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
}

.result-item.highlight {
    background: var(--accent-bg);
    border-color: var(--accent);
}

.result-label { font-size: 13px; color: var(--text-secondary); font-weight: 500; }
.result-value { font-size: 24px; font-weight: 800; color: var(--text-primary); }
.result-unit { font-size: 12px; color: var(--text-muted); font-weight: 600; }

.result-item.highlight .result-value { color: var(--accent-hover); }

.settings-container { max-width: 600px; }

.save-msg {
    margin-top: 12px;
    font-size: 13px;
    color: var(--buy);
    opacity: 0;
    transition: opacity 0.3s;
}
.save-msg.show { opacity: 1; }

/* === Modal === */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    z-index: 200;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal-overlay.active { display: flex; }

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 800px;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    animation: modalIn 0.3s ease;
}

@keyframes modalIn {
    from { opacity: 0; transform: scale(0.95) translateY(10px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
}

.modal-header h2 { font-size: 18px; font-weight: 700; }

.modal-close {
    width: 36px; height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 20px;
    cursor: pointer;
    transition: var(--transition);
}

.modal-close:hover { background: var(--sell-bg); color: var(--sell); }

.modal-body { padding: 24px; }

/* === Modal Timeframe Cards === */
.tf-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
}

.tf-card {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 16px;
}

.tf-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}

.tf-label { font-size: 14px; font-weight: 700; color: var(--text-secondary); }

.tf-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    font-size: 13px;
}

.tf-row-label { color: var(--text-muted); font-weight: 500; }
.tf-row-value { font-weight: 600; font-variant-numeric: tabular-nums; }

.tf-row-delta {
    font-size: 12px;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 4px;
}

.delta-up { color: var(--buy); background: var(--buy-bg); }
.delta-down { color: var(--sell); background: var(--sell-bg); }
.delta-zero { color: var(--text-muted); }

.div-indicator {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 11px;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 4px;
    margin-top: 4px;
}

.div-divergence { background: rgba(251, 191, 36, 0.12); color: #fbbf24; }
.div-convergence { background: rgba(34, 197, 94, 0.12); color: #22c55e; }
.div-equal { background: rgba(100, 116, 139, 0.1); color: var(--text-muted); }

/* === Advanced Filters === */
.advanced-filters {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 16px;
    padding: 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    backdrop-filter: blur(10px);
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.filter-group label {
    font-size: 11px;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    white-space: nowrap;
    letter-spacing: 0.5px;
}

.filter-select {
    padding: 8px 12px;
    font-size: 13px;
    border-radius: var(--radius-sm);
    background: rgba(0, 0, 0, 0.4);
    color: var(--text-primary);
    border: 1px solid var(--border);
    cursor: pointer;
    min-width: 140px;
    outline: none;
    transition: var(--transition);
}

.filter-select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-bg);
}

.btn-sm {
    padding: 6px 14px !important;
    font-size: 13px !important;
    height: 34px;
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: var(--border-hover);
}

/* === Responsive === */
@media (max-width: 768px) {
    .header { padding: 12px 16px; flex-wrap: wrap; gap: 10px; }
    .logo-text h1 { font-size: 16px; }
    .header-right { font-size: 12px; }
    .nav-tabs { padding: 8px 16px; overflow-x: auto; }
    .tab-btn { padding: 8px 14px; font-size: 13px; white-space: nowrap; }
    .tab-label { display: none; }
    .main-content { padding: 16px; }
    .signal-table th, .signal-table td { padding: 10px 12px; font-size: 13px; }
    .hide-mobile { display: none; }
    .calc-container { grid-template-columns: 1fr; }
    .form-grid { grid-template-columns: 1fr; }
    .tf-cards { grid-template-columns: 1fr; }
    .modal { max-height: 90vh; }
}

@media (max-width: 480px) {
    .signal-badge { padding: 4px 10px; font-size: 11px; }
    .logo-subtitle { display: none; }
}