body {
    font-family: 'Segoe UI', Tahoma, sans-serif;
    margin: 0;
    background: linear-gradient(135deg, #f0f7ff 0%, #f5f6fa 100%);
    color: #1f2a44;
}

.app-header {
    background: linear-gradient(120deg, #2d6cdf, #7e3ff2);
    color: #ffffff;
    padding: 2rem 3rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.app-header .brand h1 {
    margin: 0;
    font-size: 2rem;
}

.app-header .brand p {
    margin: 0.25rem 0 0;
    opacity: 0.85;
}

.nav-tabs {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.nav-tabs a {
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    padding: 0.5rem 1.1rem;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.12);
    transition: background 0.2s ease, color 0.2s ease;
}

.nav-tabs a:hover,
.nav-tabs a.active {
    background: #ffffff;
    color: #2d6cdf;
    font-weight: 600;
}

main {
    padding: 2rem 3rem 4rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.dashboard {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.summary-card {
    background: #ffffff;
    border-radius: 16px;
    box-shadow: 0 18px 46px rgba(45, 108, 223, 0.12);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    border-top: 4px solid rgba(45, 108, 223, 0.5);
}

.summary-card[data-trend="rising"] {
    border-top-color: rgba(34, 197, 94, 0.65);
}

.summary-card[data-trend="falling"] {
    border-top-color: rgba(239, 68, 68, 0.65);
}

.summary-card h2 {
    margin: 0;
    font-size: 1.1rem;
}

.summary-card .highlight {
    font-size: 2.5rem;
    font-weight: 700;
    color: #2d6cdf;
}

.summary-card .confidence {
    margin: 0;
    font-size: 0.95rem;
    color: #5a647c;
}

.card {
    background: #ffffff;
    border-radius: 16px;
    box-shadow: 0 16px 32px rgba(20, 47, 89, 0.08);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.card ol {
    margin: 0;
    padding-left: 1.25rem;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.card-header h2 {
    margin: 0;
    font-size: 1.25rem;
}

.badge {
    background: rgba(125, 63, 242, 0.15);
    color: #7d3ff2;
    padding: 0.35rem 0.75rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.form-inline {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    align-items: center;
}

label {
    font-weight: 600;
    color: #1f2a44;
}

input[type="file"],
select {
    padding: 0.5rem 0.75rem;
    border: 1px solid #c8d3f0;
    border-radius: 8px;
    font-size: 0.95rem;
}

button {
    background: linear-gradient(120deg, #2d6cdf, #7e3ff2);
    color: #ffffff;
    border: none;
    padding: 0.55rem 1.4rem;
    border-radius: 999px;
    cursor: pointer;
    font-weight: 600;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

button:hover {
    transform: translateY(-1px);
    box-shadow: 0 12px 20px rgba(45, 108, 223, 0.25);
}

.grid {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.controls {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    align-items: center;
}

.card-body {
    font-size: 0.95rem;
    line-height: 1.5;
}

.hint {
    font-size: 0.85rem;
    color: #5a647c;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

th, td {
    border: 1px solid #e3e7f5;
    padding: 0.6rem;
    text-align: center;
    font-size: 0.9rem;
}

th {
    background: #f4f6ff;
    font-weight: 600;
}

.forecast-meta {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1.5rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.confidence-tag {
    background: rgba(45, 108, 223, 0.1);
    color: #2d6cdf;
    padding: 0.35rem 0.8rem;
    border-radius: 999px;
    font-weight: 600;
    display: inline-block;
    margin-top: 0.4rem;
}

.forecast-summary {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    color: #44506c;
}

.forecast-summary span strong {
    color: #1f2a44;
}

.forecast-extra {
    margin-top: 0.75rem;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    font-size: 0.85rem;
    color: #5a647c;
}

.forecast-extra span {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.recent-results {
    margin-top: 1.25rem;
    background: #f8f9ff;
    padding: 0.9rem 1rem;
    border-radius: 10px;
    color: #44506c;
}

.recent-results h4 {
    margin: 0 0 0.4rem;
    font-size: 0.95rem;
    color: #2d6cdf;
}

#forecast-chart,
#frequency-chart {
    max-height: 320px;
}

.insights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
}

.insight-card {
    background: #ffffff;
    border-radius: 14px;
    padding: 1.4rem;
    box-shadow: 0 16px 28px rgba(31, 42, 68, 0.08);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.insight-card h3 {
    margin: 0;
    color: #2d6cdf;
}

.insight-card p {
    margin: 0;
    font-size: 0.95rem;
    color: #44506c;
}

footer {
    text-align: center;
    padding: 2rem 1rem;
    color: #5a647c;
    font-size: 0.9rem;
}

@media (max-width: 600px) {
    .app-header {
        padding: 1.5rem;
    }

    main {
        padding: 1.5rem 1rem 3rem;
    }
}