:root {
    --bg: #0f0f0f;
    --card-bg: #1a1a1e;
    --card-border: rgba(255,255,255,0.06);
    --text: #e8e8ed;
    --text-secondary: #8e8e93;
    --accent: #3390ec;
    --accent-glow: rgba(51,144,236,0.15);
    --green: #34c759;
    --orange: #ff9f0a;
    --red: #ff453a;
    --aws-color: #ff9900;
    --gcp-color: #4285f4;
    --azure-color: #0078d4;
}

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

body {
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, sans-serif;
    padding: 16px;
    padding-bottom: 32px;
    -webkit-font-smoothing: antialiased;
}

header { text-align: center; padding: 8px 0 16px; }
header h1 { font-size: 22px; font-weight: 700; letter-spacing: -0.5px; }
#generated-date { font-size: 12px; color: var(--text-secondary); margin-top: 4px; }

/* ── Total Card ─────────────────────────────────────── */
.total-card {
    background: linear-gradient(135deg, #1c1c24 0%, #1a1a2e 100%);
    border: 1px solid var(--accent-glow);
}
.total-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
}
.total-divider {
    width: 1px;
    height: 40px;
    background: rgba(255,255,255,0.1);
}
.total-item { text-align: center; }
.total-label {
    display: block;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}
.total-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: -1px;
}
.total-value.secondary {
    font-size: 22px;
    color: var(--text-secondary);
}

/* ── Cards ──────────────────────────────────────────── */
.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 14px;
    padding: 16px;
    margin-bottom: 12px;
}

/* ── Filters ───────────────────────────────────────── */
.filter-card { padding: 12px 14px; }
.filter-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
}
.filter-label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    color: var(--text-secondary);
}
.filter-chips {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: flex-end;
    flex: 1;
}
.chip {
    border: 1px solid var(--card-border);
    background: rgba(255,255,255,0.04);
    color: var(--text-secondary);
    padding: 6px 10px;
    border-radius: 999px;
    font-size: 11px;
    cursor: pointer;
    user-select: none;
}
.chip.active {
    border-color: var(--accent);
    background: var(--accent-glow);
    color: var(--text);
}

/* ── Provider Cards ─────────────────────────────────── */
.provider-card { position: relative; overflow: hidden; }
.provider-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    border-radius: 14px 14px 0 0;
}
.provider-card.aws::before { background: var(--aws-color); }
.provider-card.gcp::before { background: var(--gcp-color); }
.provider-card.azure::before { background: var(--azure-color); }

.provider-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 12px;
}
.provider-left { display: flex; align-items: center; gap: 8px; }
.provider-emoji { font-size: 20px; }
.provider-name { font-size: 15px; font-weight: 600; }
.provider-cost { font-size: 20px; font-weight: 700; text-align: right; }
.provider-cost .cost-label {
    display: block;
    font-size: 10px;
    font-weight: 400;
    color: var(--text-secondary);
    text-transform: uppercase;
}

.source-badge {
    display: inline-block;
    font-size: 10px;
    padding: 2px 8px;
    border-radius: 6px;
    background: rgba(255,255,255,0.06);
    color: var(--text-secondary);
    margin-bottom: 10px;
}
.source-badge.live { background: rgba(52,199,89,0.15); color: var(--green); }
.source-badge.estimated { background: rgba(255,159,10,0.15); color: var(--orange); }
.source-badge.unavailable { background: rgba(255,69,58,0.15); color: var(--red); }

/* ── Model Items ────────────────────────────────────── */
.model-item {
    padding: 10px 0;
    border-top: 1px solid rgba(255,255,255,0.04);
}
.model-item:first-child { border-top: none; }
.model-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
}
.model-name { font-size: 13px; font-weight: 500; }
.model-cost { font-size: 13px; font-weight: 600; font-variant-numeric: tabular-nums; }
.model-meta {
    font-size: 11px;
    color: var(--text-secondary);
    margin-top: 3px;
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}
.model-meta span { white-space: nowrap; }

/* ── Token Grid ─────────────────────────────────────── */
.token-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 4px;
    margin-top: 8px;
    padding: 8px;
    background: rgba(0,0,0,0.2);
    border-radius: 8px;
}
.token-cell { text-align: center; }
.token-label {
    display: block;
    font-size: 9px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    margin-bottom: 2px;
}
.token-val {
    font-size: 13px;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}
.discount-tag {
    font-size: 10px;
    padding: 1px 5px;
    border-radius: 4px;
    background: rgba(52,199,89,0.15);
    color: var(--green);
    font-weight: 500;
}
.unavailable-note {
    font-size: 11px;
    color: var(--red);
    opacity: 0.8;
    margin-top: 6px;
    font-style: italic;
}

/* ── Chart ──────────────────────────────────────────── */
#chart-section h3 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 12px;
}
#bar-chart {
    display: flex;
    align-items: flex-end;
    height: 120px;
    gap: 8px;
    padding-bottom: 24px;
    position: relative;
}
.bar-group {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    height: 100%;
    justify-content: flex-end;
}
.bar-stack {
    width: 100%;
    max-width: 48px;
    display: flex;
    flex-direction: column-reverse;
    border-radius: 4px 4px 0 0;
    overflow: hidden;
}
.bar-segment {
    width: 100%;
    min-height: 1px;
    transition: height 0.4s ease;
}
.bar-amount {
    font-size: 10px;
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--text);
}
.bar-label {
    position: absolute;
    bottom: -20px;
    font-size: 10px;
    color: var(--text-secondary);
}
#chart-legend {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-top: 8px;
    flex-wrap: wrap;
}
.legend-item {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 11px;
    color: var(--text-secondary);
}
.legend-dot {
    width: 8px;
    height: 8px;
    border-radius: 2px;
}

/* ── Footer ─────────────────────────────────────────── */
footer {
    text-align: center;
    padding: 16px 0 8px;
    font-size: 11px;
    color: var(--text-secondary);
}

/* ── Loading ────────────────────────────────────────── */
.loading {
    text-align: center;
    padding: 48px 16px;
    color: var(--text-secondary);
    font-size: 14px;
}
.error {
    text-align: center;
    padding: 24px;
    color: var(--red);
    font-size: 13px;
}