/* ============================================================
   AP Lang Score History Tracker — Styles v1.0.0
   ============================================================ */

.ap-score-tracker-panel {
    margin-top: 32px;
    border-radius: 16px;
    overflow: hidden;
    background: var(--calc-surface, #fff);
    border: 1px solid var(--calc-border, #e2e8f0);
    box-shadow: 0 4px 24px rgba(0,0,0,.06);
}

.tracker-inner { padding: 24px; }

/* ── Header ── */
.tracker-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 20px;
}
.tracker-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--calc-text, #1e293b);
    margin: 0;
}
.tracker-actions { display: flex; gap: 8px; }
.tracker-btn {
    border: none;
    border-radius: 8px;
    padding: 7px 14px;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: opacity .2s, transform .1s;
}
.tracker-btn:hover  { opacity: .85; }
.tracker-btn:active { transform: scale(.97); }
.tracker-export-btn { background: #0f172a; color: #fff; }
.tracker-clear-btn  { background: #fee2e2; color: #dc2626; }

/* ── Stats row ── */
.tracker-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(90px, 1fr));
    gap: 12px;
    margin-bottom: 20px;
}
.tracker-stat {
    background: var(--calc-bg, #f8fafc);
    border-radius: 10px;
    padding: 12px;
    text-align: center;
}
.tracker-stat-val {
    display: block;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--calc-primary, #6366f1);
    line-height: 1.1;
}
.tracker-stat-lbl {
    display: block;
    font-size: 0.72rem;
    color: var(--calc-text-secondary, #64748b);
    margin-top: 4px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: .04em;
}

/* Score colour overrides for stat values */
.tracker-score-5-text { color: #6366f1 !important; }
.tracker-score-4-text { color: #22c55e !important; }
.tracker-score-3-text { color: #eab308 !important; }
.tracker-score-2-text { color: #f97316 !important; }
.tracker-score-1-text { color: #ef4444 !important; }

/* Trend colours */
.trend-up   { color: #16a34a !important; }
.trend-down { color: #dc2626 !important; }
.trend-flat { color: #64748b !important; }

/* ── Trend Chart ── */
.tracker-chart {
    display: flex;
    align-items: flex-end;
    gap: 6px;
    height: 80px;
    background: var(--calc-bg, #f8fafc);
    border-radius: 10px;
    padding: 10px 12px 6px;
    margin-bottom: 20px;
}
.trend-bar-wrap {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    height: 100%;
    justify-content: flex-end;
    gap: 3px;
    cursor: default;
}
.trend-bar {
    width: 100%;
    border-radius: 4px 4px 0 0;
    min-height: 4px;
    transition: height .3s ease;
}
.trend-bar-label {
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--calc-text-secondary, #64748b);
}

/* ── Table ── */
.tracker-table-wrap {
    overflow-x: auto;
    border-radius: 10px;
    border: 1px solid var(--calc-border, #e2e8f0);
}
.tracker-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}
.tracker-table thead tr {
    background: var(--calc-bg, #f8fafc);
}
.tracker-table th {
    padding: 10px 12px;
    text-align: left;
    font-weight: 700;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: .05em;
    color: var(--calc-text-secondary, #64748b);
    border-bottom: 2px solid var(--calc-border, #e2e8f0);
    white-space: nowrap;
}
.tracker-table td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--calc-border, #e2e8f0);
    color: var(--calc-text, #1e293b);
    vertical-align: middle;
}
.tracker-table tbody tr:last-child td { border-bottom: none; }
.tracker-table tbody tr:hover { background: var(--calc-bg, #f8fafc); }

.tracker-empty {
    text-align: center;
    color: var(--calc-text-secondary, #64748b);
    padding: 28px 12px !important;
    font-size: 0.9rem;
}

/* AP Score badge */
.tracker-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    font-weight: 800;
    font-size: 0.95rem;
    color: #fff;
}
.tracker-score-5 { background: #6366f1; }
.tracker-score-4 { background: #22c55e; }
.tracker-score-3 { background: #eab308; }
.tracker-score-2 { background: #f97316; }
.tracker-score-1 { background: #ef4444; }

.tracker-essays {
    font-family: monospace;
    letter-spacing: .06em;
    color: var(--calc-text-secondary, #64748b);
}
.tracker-curve {
    background: var(--calc-bg, #f1f5f9);
    border-radius: 4px;
    padding: 2px 7px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--calc-text-secondary, #64748b);
}

/* ── Footer note ── */
.tracker-note {
    margin: 14px 0 0;
    font-size: 0.75rem;
    color: var(--calc-text-secondary, #64748b);
    text-align: center;
}

/* ── Responsive ── */
@media (max-width: 600px) {
    .tracker-table th:nth-child(6),
    .tracker-table td:nth-child(6) { display: none; } /* hide Essays column on mobile */
    .tracker-stats { grid-template-columns: repeat(2, 1fr); }
}