/* ==========================================================================
   Sudoku.School — Stats Panel CSS (stats.css)
   Neubrutalism-styled stats drawer: personal records, streaks, achievements.
   ========================================================================== */

/* ---------- Stats Toggle Button ---------- */
.ss-stats-toggle {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 9998;
    width: 52px;
    height: 52px;
    border-radius: 50%;
    border: 2.5px solid var(--nb-border);
    background: var(--nb-card);
    box-shadow: 4px 4px 0 var(--nb-shadow);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
    line-height: 1;
}

.ss-stats-toggle:hover {
    transform: translateY(-2px);
    box-shadow: 5px 5px 0 var(--nb-shadow);
}

.ss-stats-toggle:active {
    transform: translateY(1px);
    box-shadow: 2px 2px 0 var(--nb-shadow);
}

.ss-stats-toggle__badge {
    position: absolute;
    top: -4px;
    right: -4px;
    min-width: 20px;
    height: 20px;
    border-radius: 10px;
    background: var(--nb-coral);
    color: #fff;
    font-size: 0.7rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 5px;
    border: 2px solid var(--nb-border);
}

/* ---------- Stats Drawer Overlay ---------- */
.ss-stats-overlay {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: rgba(0, 0, 0, 0.3);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease;
}

.ss-stats-overlay._open {
    opacity: 1;
    pointer-events: auto;
}

/* ---------- Stats Drawer ---------- */
.ss-stats-drawer {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 10000;
    width: 380px;
    max-width: 90vw;
    background: var(--nb-bg);
    border-left: 3px solid var(--nb-border);
    box-shadow: -6px 0 0 var(--nb-shadow);
    transform: translateX(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow-y: auto;
    overscroll-behavior: contain;
}

.ss-stats-drawer._open {
    transform: translateX(0);
}

/* ---------- Drawer Header ---------- */
.ss-stats-header {
    position: sticky;
    top: 0;
    z-index: 1;
    background: var(--nb-blue);
    color: #fff;
    padding: 18px 20px;
    border-bottom: 3px solid var(--nb-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.ss-stats-header h2 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.ss-stats-close {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    border: 2px solid rgba(255, 255, 255, 0.4);
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s ease;
}

.ss-stats-close:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* ---------- Drawer Body ---------- */
.ss-stats-body {
    padding: 20px;
}

/* ---------- Section ---------- */
.ss-stats-section {
    margin-bottom: 24px;
}

.ss-stats-section__title {
    font-size: 0.8rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: #888;
    margin: 0 0 12px;
    padding-bottom: 6px;
    border-bottom: 2px dashed #e0e0e0;
}

/* ---------- Stat Cards Grid ---------- */
.ss-stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.ss-stat-card {
    background: var(--nb-card);
    border: 2.5px solid var(--nb-border);
    border-radius: 12px;
    padding: 14px;
    box-shadow: 3px 3px 0 var(--nb-shadow);
    text-align: center;
}

.ss-stat-card__value {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--nb-border);
    line-height: 1.2;
}

.ss-stat-card--highlight .ss-stat-card__value {
    color: var(--nb-blue);
}

.ss-stat-card__label {
    font-size: 0.75rem;
    font-weight: 700;
    color: #888;
    margin-top: 4px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

/* ---------- Streak Display ---------- */
.ss-streak-display {
    background: var(--nb-card);
    border: 2.5px solid var(--nb-border);
    border-radius: 12px;
    padding: 16px;
    box-shadow: 3px 3px 0 var(--nb-shadow);
    text-align: center;
}

.ss-streak-display__flame {
    font-size: 2rem;
    line-height: 1;
}

.ss-streak-display__count {
    font-size: 2rem;
    font-weight: 800;
    color: var(--nb-border);
}

.ss-streak-display__label {
    font-size: 0.8rem;
    font-weight: 700;
    color: #888;
}

.ss-streak-display__sub {
    font-size: 0.75rem;
    color: #aaa;
    margin-top: 4px;
}

/* ---------- Best Times Table ---------- */
.ss-times-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

.ss-times-table th {
    text-align: left;
    font-size: 0.7rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #888;
    padding: 6px 8px;
    border-bottom: 2px solid var(--nb-border);
}

.ss-times-table td {
    padding: 8px;
    border-bottom: 1px solid #eee;
    font-weight: 600;
}

.ss-times-table tr:last-child td {
    border-bottom: none;
}

.ss-times-table .ss-time-value {
    font-weight: 800;
    color: var(--nb-blue);
    font-variant-numeric: tabular-nums;
}

/* ---------- Achievement Grid ---------- */
.ss-achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
    gap: 10px;
}

.ss-achievement {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 10px 4px;
    border-radius: 10px;
    border: 2px solid #eee;
    background: #fafafa;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.ss-achievement:hover {
    transform: translateY(-2px);
    box-shadow: 2px 2px 0 #ddd;
}

.ss-achievement._earned {
    border-color: var(--nb-border);
    background: var(--nb-card);
    box-shadow: 3px 3px 0 var(--nb-shadow);
}

.ss-achievement._locked {
    opacity: 0.4;
    filter: grayscale(1);
}

.ss-achievement__icon {
    font-size: 1.5rem;
    line-height: 1;
    margin-bottom: 4px;
}

.ss-achievement__name {
    font-size: 0.6rem;
    font-weight: 700;
    color: var(--nb-border);
    line-height: 1.3;
}

/* ---------- Achievement Toast ---------- */
.ss-achievement-toast {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(-120px);
    z-index: 10001;
    background: var(--nb-card);
    border: 2.5px solid var(--nb-border);
    border-radius: 14px;
    padding: 14px 24px;
    box-shadow: 4px 4px 0 var(--nb-shadow);
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    font-size: 0.95rem;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    white-space: nowrap;
}

.ss-achievement-toast._show {
    transform: translateX(-50%) translateY(0);
}

.ss-achievement-toast__icon {
    font-size: 1.8rem;
    line-height: 1;
}

.ss-achievement-toast__text {
    display: flex;
    flex-direction: column;
}

.ss-achievement-toast__label {
    font-size: 0.65rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--nb-coral);
}

/* ---------- Empty State ---------- */
.ss-stats-empty {
    text-align: center;
    padding: 40px 20px;
    color: #999;
}

.ss-stats-empty__icon {
    font-size: 3rem;
    margin-bottom: 12px;
}

.ss-stats-empty__text {
    font-size: 0.9rem;
    line-height: 1.6;
}

/* ---------- Responsive ---------- */
@media (max-width: 600px) {
    .ss-stats-drawer {
        width: 100%;
        max-width: 100%;
    }

    .ss-stats-toggle {
        bottom: 14px;
        right: 14px;
        width: 46px;
        height: 46px;
        font-size: 1.3rem;
    }

    .ss-stat-card__value {
        font-size: 1.3rem;
    }

    .ss-achievements-grid {
        grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
    }
}