:root {
    --accent: #38bdf8;
    --accent-glow: rgba(56, 189, 248, 0.3);
    --accent-dim: rgba(56, 189, 248, 0.12);
    --bg-card: rgba(15, 23, 42, 0.7);
    --text-muted: #64748b;
    --text-mid: #94a3b8;
    --border: rgba(255, 255, 255, 0.07);
}

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

html {
    scroll-behavior: smooth;
}

body {
    background:
        radial-gradient(ellipse 90% 55% at 50% -5%, rgba(56, 189, 248, 0.14) 0%, transparent 65%),
        radial-gradient(ellipse 55% 40% at 92% 92%, rgba(129, 140, 248, 0.09) 0%, transparent 65%),
        #020617;
    color: white;
    font-family: 'Inter', sans-serif;
    overflow-x: hidden;
}

::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #020617; }
::-webkit-scrollbar-thumb { background: #1e293b; border-radius: 8px; }

.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 60px;
    background: rgba(2, 6, 23, 0.82);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.logo {
    font-size: 26px;
    font-weight: 800;
    letter-spacing: 0.5px;
    color: #38bdf8;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    color: #64748b;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
    color: white;
}

.gradient-text {
    background: linear-gradient(135deg, #38bdf8 0%, #818cf8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
}

.dashboard-header {
    width: 100%;
    padding: 80px 0 60px;
    text-align: center;
}

.header-content {
    width: 90%;
    margin: auto;
}

.dashboard-header h1 {
    font-size: 60px;
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -1.5px;
    margin-bottom: 14px;
}

.dashboard-header p {
    font-size: 18px;
    color: #64748b;
}

.last-updated {
    font-size: 13px;
    color: #334155;
    margin-top: 14px;
}

.last-updated a {
    color: #38bdf8;
    text-decoration: none;
    font-weight: 500;
}

.last-updated a:hover { text-decoration: underline; }

.section {
    width: 92%;
    margin: 0 auto 60px;
}

.section-header {
    margin-bottom: 26px;
    position: relative;
    padding-left: 18px;
}

.section-header::before {
    content: '';
    position: absolute;
    left: 0;
    top: 4px;
    bottom: 4px;
    width: 3px;
    background: linear-gradient(180deg, #38bdf8, #818cf8);
    border-radius: 999px;
}

.section-header h2 {
    font-size: 26px;
    font-weight: 700;
    color: white;
    letter-spacing: -0.5px;
}

.upload-wrapper {
    width: 92%;
    margin: 0 auto 60px;
}

.upload-card {
    background: rgba(15, 23, 42, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.07);
    border-radius: 22px;
    padding: 36px 40px;
    backdrop-filter: blur(16px);
}

.upload-card h2 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 6px;
    letter-spacing: -0.5px;
}

.upload-card > p {
    color: #64748b;
    font-size: 14px;
    margin-bottom: 24px;
}

.upload-controls {
    display: flex;
    gap: 14px;
    align-items: center;
    flex-wrap: wrap;
}

input[type="file"] {
    background: rgba(2, 6, 23, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.08);
    padding: 12px 16px;
    border-radius: 10px;
    color: #94a3b8;
    font-size: 14px;
    flex: 1;
    font-family: inherit;
}

button {
    background: linear-gradient(135deg, #38bdf8, #0ea5e9);
    border: none;
    color: white;
    padding: 13px 26px;
    border-radius: 11px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
    white-space: nowrap;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(56, 189, 248, 0.3);
}

button:disabled {
    opacity: 0.35;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

.metrics-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 18px;
}

.metric-card {
    background: rgba(15, 23, 42, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.07);
    border-radius: 20px;
    padding: 30px 26px;
    backdrop-filter: blur(18px);
    transition: all 0.22s;
}

.metric-card:hover {
    transform: translateY(-4px);
    border-color: rgba(56, 189, 248, 0.35);
    box-shadow: 0 8px 28px rgba(56, 189, 248, 0.08);
}

.metric-label {
    color: #475569;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    margin-bottom: 14px;
}

.metric-value {
    font-size: 36px;
    font-weight: 800;
    color: #38bdf8;
    letter-spacing: -1px;
}

.diagnostics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 18px;
}

.diagnostic-card {
    background: rgba(15, 23, 42, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.07);
    border-radius: 20px;
    padding: 26px;
    transition: all 0.22s;
}

.diagnostic-card:hover {
    transform: translateY(-3px);
    border-color: rgba(56, 189, 248, 0.35);
}

.diagnostic-card h3 {
    color: #475569;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    margin-bottom: 12px;
}

.diagnostic-card p {
    font-size: 22px;
    font-weight: 700;
    color: #e2e8f0;
}

.status-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
}

.status-card {
    background: rgba(15, 23, 42, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.07);
    border-radius: 22px;
    padding: 40px;
    text-align: center;
}

.status-title {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: #475569;
    margin-bottom: 18px;
}

.badge {
    display: inline-block;
    padding: 10px 22px;
    border-radius: 999px;
    background: rgba(56, 189, 248, 0.1);
    color: #38bdf8;
    font-weight: 700;
    font-size: 16px;
    border: 1px solid rgba(56, 189, 248, 0.18);
    letter-spacing: -0.2px;
}

.signal-badge {
    background: rgba(34, 197, 94, 0.1);
    color: #22c55e;
    border-color: rgba(34, 197, 94, 0.18);
}

.chart-container {
    background: rgba(15, 23, 42, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.07);
    border-radius: 22px;
    padding: 22px;
    overflow: hidden;
    backdrop-filter: blur(18px);
}

.plotly-graph-div {
    border-radius: 14px !important;
}

footer {
    margin-top: 80px;
    padding: 48px 20px;
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-content h3 {
    font-size: 22px;
    font-weight: 800;
    color: #38bdf8;
    margin-bottom: 10px;
}

.footer-content p {
    color: #475569;
    font-size: 14px;
    margin-bottom: 8px;
}

.footer-content span {
    color: #1e293b;
    font-size: 13px;
}

.hero {
    padding: 130px 24px 100px;
}

.hero-content {
    max-width: 820px;
    margin: 0 auto;
    text-align: center;
    animation: fadeInUp 0.7s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px 6px 12px;
    border-radius: 999px;
    border: 1px solid rgba(56, 189, 248, 0.22);
    color: #38bdf8;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: 36px;
    background: rgba(56, 189, 248, 0.05);
}

.badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #38bdf8;
    flex-shrink: 0;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.4; transform: scale(0.75); }
}

.hero-title {
    font-size: 82px;
    font-weight: 900;
    line-height: 1.0;
    letter-spacing: -3px;
    margin-bottom: 28px;
}

.hero-sub {
    font-size: 18px;
    color: #64748b;
    line-height: 1.8;
    max-width: 520px;
    margin: 0 auto 52px;
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 36px;
    margin-bottom: 52px;
    padding: 24px 40px;
    background: rgba(15, 23, 42, 0.55);
    border: 1px solid rgba(255, 255, 255, 0.07);
    border-radius: 18px;
    backdrop-filter: blur(14px);
}

.hero-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.stat-num {
    font-size: 22px;
    font-weight: 800;
    color: white;
    letter-spacing: -0.5px;
}

.stat-label {
    font-size: 11px;
    color: #334155;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.07em;
}

.stat-divider {
    width: 1px;
    height: 36px;
    background: rgba(255, 255, 255, 0.07);
}

.upload-zone {
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 22px;
    padding: 32px;
    backdrop-filter: blur(14px);
    text-align: left;
    margin-bottom: 18px;
}

.upload-zone input[type="file"] {
    display: none;
}

.upload-zone-inner {
    border: 1.5px dashed rgba(56, 189, 248, 0.22);
    border-radius: 14px;
    padding: 38px 24px;
    cursor: pointer;
    transition: all 0.22s;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
    margin-bottom: 22px;
    user-select: none;
}

.upload-zone-inner:hover,
.upload-zone-inner.drag-over {
    border-color: rgba(56, 189, 248, 0.5);
    background: rgba(56, 189, 248, 0.04);
}

.upload-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    background: rgba(56, 189, 248, 0.1);
    border: 1px solid rgba(56, 189, 248, 0.14);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #38bdf8;
}

.upload-main {
    font-size: 15px;
    color: #cbd5e1;
    margin-bottom: 5px;
    font-weight: 500;
}

.upload-browse {
    color: #38bdf8;
    font-weight: 600;
}

.upload-hint {
    font-size: 13px;
    color: #334155;
}

.upload-actions {
    display: flex;
    justify-content: flex-end;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    background: linear-gradient(135deg, #38bdf8, #0ea5e9);
    border: none;
    color: white;
    padding: 14px 28px;
    border-radius: 12px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(56, 189, 248, 0.35);
}

.btn-primary:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.divider {
    display: flex;
    align-items: center;
    gap: 16px;
    color: #1e293b;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin: 28px 0;
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: rgba(255, 255, 255, 0.06);
}

.ticker-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.ticker-card {
    background: rgba(15, 23, 42, 0.65);
    border: 1px solid rgba(255, 255, 255, 0.07);
    border-radius: 16px;
    padding: 20px;
    text-decoration: none;
    display: block;
    transition: all 0.22s;
}

.ticker-card:hover {
    border-color: rgba(56, 189, 248, 0.38);
    background: rgba(56, 189, 248, 0.03);
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(56, 189, 248, 0.08);
}

.ticker-card-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 14px;
}

.ticker-name {
    font-size: 18px;
    font-weight: 800;
    color: white;
    letter-spacing: -0.5px;
}

.ticker-tag {
    font-size: 10px;
    font-weight: 700;
    padding: 3px 9px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.05);
    color: #475569;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    border: 1px solid rgba(255, 255, 255, 0.06);
}

.live-tag {
    background: rgba(34, 197, 94, 0.1);
    color: #22c55e;
    border-color: rgba(34, 197, 94, 0.15);
}

.ticker-card-action {
    font-size: 13px;
    color: #334155;
    font-weight: 500;
    transition: color 0.2s;
}

.ticker-card:hover .ticker-card-action {
    color: #38bdf8;
}

.loading-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(2, 6, 23, 0.88);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 9999;
    align-items: center;
    justify-content: center;
}

.loading-overlay.visible {
    display: flex;
}

.loading-card {
    text-align: center;
    padding: 52px 48px;
    background: rgba(15, 23, 42, 0.95);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 28px;
    max-width: 360px;
    width: 100%;
    box-shadow: 0 40px 80px rgba(0, 0, 0, 0.5);
}

.loading-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin: 28px 0 10px;
    color: white;
    letter-spacing: -0.3px;
}

.loading-card p {
    font-size: 14px;
    color: #475569;
    line-height: 1.6;
}

.spinner {
    width: 44px;
    height: 44px;
    border: 3px solid rgba(56, 189, 248, 0.12);
    border-top-color: #38bdf8;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto;
}

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

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(22px); }
    to   { opacity: 1; transform: translateY(0); }
}

.section {
    animation: fadeInUp 0.55s cubic-bezier(0.16, 1, 0.3, 1) both;
}

@media (max-width: 1100px) {
    .dashboard-header h1 { font-size: 48px; }
    .hero-title { font-size: 64px; }
    .metrics-container { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
}

@media (max-width: 900px) {
    .navbar {
        flex-direction: column;
        gap: 14px;
        padding: 16px 20px;
    }
    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 18px;
    }
    .dashboard-header h1 { font-size: 38px; letter-spacing: -0.5px; }
    .hero-title { font-size: 50px; letter-spacing: -1.5px; }
    .hero-stats { gap: 24px; padding: 20px 28px; }
    .status-container { grid-template-columns: 1fr; }
    .ticker-grid { grid-template-columns: 1fr; }
    .upload-controls { flex-direction: column; align-items: stretch; }
    .upload-controls button { width: 100%; }
    .upload-actions { justify-content: stretch; }
    .btn-primary { width: 100%; justify-content: center; }
}

@media (max-width: 600px) {
    .navbar { padding: 14px 16px; }
    .dashboard-header { padding: 60px 0 40px; }
    .dashboard-header h1 { font-size: 32px; }
    .section-header h2 { font-size: 22px; }
    .metric-value { font-size: 30px; }
    .hero { padding: 100px 16px 60px; }
    .hero-title { font-size: 40px; letter-spacing: -1px; }
    .hero-sub { font-size: 16px; }
    .hero-stats {
        flex-wrap: wrap;
        gap: 16px;
        padding: 20px;
    }
    .stat-divider { display: none; }
    .ticker-grid { grid-template-columns: 1fr; }
    .upload-zone { padding: 20px; }
    .upload-zone-inner { padding: 28px 16px; }
    .loading-card { padding: 40px 28px; margin: 16px; }
}

@media (prefers-reduced-motion: reduce) {
    .section,
    .hero-content,
    .badge-dot,
    .spinner {
        animation: none;
    }
}