/**
 * AqlSkill Duolingo 2.5D Design System
 * Theme-aware via CSS variables from SiteSetting::buildThemeCss()
 */

/* ── Semantic tokens (derived from theme) ── */
:root {
    --duo-radius: 14px;
    --duo-radius-sm: 10px;
    --duo-radius-lg: 18px;
    --duo-depth: 4px;
    --duo-success: #58CC02;
    --duo-success-dark: #46A302;
    --duo-danger: #FF4B4B;
    --duo-danger-dark: #D33131;
    --duo-warning: #FFC800;
    --duo-warning-dark: #E5A800;
    --duo-info: var(--primary, #1CB0F6);
    --duo-info-dark: color-mix(in srgb, var(--primary, #1CB0F6) 75%, black);
    --duo-overlay: color-mix(in srgb, var(--bg-main) 15%, rgba(0, 0, 0, 0.75));
    --duo-input-bg: color-mix(in srgb, var(--card-bg) 92%, var(--border-color));
    --duo-stat-indigo: var(--accent, #CE82FF);
    --duo-stat-emerald: var(--secondary, #58CC02);
    --duo-stat-orange: var(--secondary, #FFC107);
    --duo-stat-red: var(--duo-danger);
}

/* ── Legacy Tailwind → theme mapping (panel-wide) ── */
[data-theme] .bg-slate-950,
[data-theme] .bg-slate-950\/80 { background-color: var(--duo-overlay) !important; }
[data-theme] .bg-slate-900 { background-color: var(--card-bg) !important; }
[data-theme] .bg-slate-800,
[data-theme] .bg-slate-800\/50,
[data-theme] .bg-slate-800\/20 { background-color: var(--duo-input-bg) !important; }
[data-theme] .bg-slate-700,
[data-theme] .bg-slate-700\/50 { background-color: color-mix(in srgb, var(--border-color) 40%, var(--card-bg)) !important; }
[data-theme] .border-slate-700,
[data-theme] .border-slate-700\/50,
[data-theme] .border-slate-600 { border-color: var(--border-color) !important; }
[data-theme] .text-white { color: var(--text-main) !important; }
[data-theme] .text-slate-300 { color: color-mix(in srgb, var(--text-main) 85%, var(--text-muted)) !important; }
[data-theme] .text-slate-400,
[data-theme] .text-slate-500,
[data-theme] .text-slate-600 { color: var(--text-muted) !important; }
[data-theme] .bg-indigo-600,
[data-theme] .bg-indigo-500 { background-color: var(--primary) !important; }
[data-theme] .hover\:bg-indigo-500:hover { background-color: color-mix(in srgb, var(--primary) 85%, white) !important; }
[data-theme] .text-indigo-400,
[data-theme] .text-indigo-300 { color: var(--text-active) !important; }
[data-theme] .border-indigo-500,
[data-theme] .border-indigo-400\/50,
[data-theme] .border-indigo-500\/20 { border-color: color-mix(in srgb, var(--primary) 50%, var(--border-color)) !important; }
[data-theme] .bg-indigo-500\/10,
[data-theme] .bg-indigo-500\/15 { background-color: var(--nav-bg-active) !important; }
[data-theme] .focus\:border-indigo-500:focus { border-color: var(--text-active) !important; }
[data-theme] .accent-indigo-500 { accent-color: var(--primary) !important; }
[data-theme] .from-indigo-500 { --tw-gradient-from: var(--primary) !important; }
[data-theme] .to-purple-600 { --tw-gradient-to: var(--accent) !important; }
[data-theme] .shadow-indigo-500\/20 { --tw-shadow-color: color-mix(in srgb, var(--primary) 25%, transparent) !important; }

/* ── Page shell ── */
.duo-page {
    padding: 1rem;
    color: var(--text-main);
}
@media (min-width: 768px) {
    .duo-page { padding: 1.5rem 2rem; }
}

.duo-page-title {
    font-size: 1.35rem;
    font-weight: 900;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 0.65rem;
}
.duo-page-subtitle {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

/* ── 2.5D Cards ── */
.duo-card {
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: var(--duo-radius-lg);
    box-shadow: 0 var(--duo-depth) 0 var(--border-color);
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.duo-card:hover {
    transform: translateY(-2px);
}
.duo-card-flat {
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: var(--duo-radius);
}

.duo-stat-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.65rem;
}
@media (min-width: 768px) {
    .duo-stat-grid { grid-template-columns: repeat(4, 1fr); }
}
.duo-stat {
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: var(--duo-radius);
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.65rem;
    box-shadow: 0 3px 0 var(--border-color);
}
.duo-stat-icon {
    width: 2.25rem;
    height: 2.25rem;
    border-radius: var(--duo-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.95rem;
    flex-shrink: 0;
    border: 2px solid transparent;
    border-bottom-width: 3px;
}
.duo-stat-icon.primary { background: var(--nav-bg-active); color: var(--text-active); border-bottom-color: var(--nav-border-active); }
.duo-stat-icon.success { background: color-mix(in srgb, var(--duo-success) 15%, transparent); color: var(--duo-success); border-bottom-color: var(--duo-success-dark); }
.duo-stat-icon.warning { background: color-mix(in srgb, var(--duo-warning) 15%, transparent); color: var(--duo-warning-dark); border-bottom-color: var(--duo-warning-dark); }
.duo-stat-icon.danger { background: color-mix(in srgb, var(--duo-danger) 15%, transparent); color: var(--duo-danger); border-bottom-color: var(--duo-danger-dark); }
.duo-stat-value { font-size: 1.15rem; font-weight: 900; color: var(--text-main); line-height: 1.1; }
.duo-stat-label { font-size: 0.65rem; font-weight: 700; color: var(--text-muted); }

/* ── 2.5D Buttons ── */
.duo-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.55rem 1rem;
    font-size: 0.85rem;
    font-weight: 800;
    border-radius: var(--duo-radius);
    border: 2px solid transparent;
    border-bottom-width: var(--duo-depth);
    cursor: pointer;
    transition: transform 0.08s ease, border-bottom-width 0.08s ease, margin-top 0.08s ease, filter 0.15s;
    text-decoration: none;
    white-space: nowrap;
}
.duo-btn:active {
    transform: translateY(2px);
    border-bottom-width: 2px;
    margin-top: 2px;
}
.duo-btn-primary {
    background: var(--primary);
    color: #fff;
    border-bottom-color: var(--duo-info-dark);
}
.duo-btn-primary:hover { filter: brightness(1.06); }
.duo-btn-secondary {
    background: var(--secondary);
    color: color-mix(in srgb, var(--bg-main) 90%, black);
    border-bottom-color: color-mix(in srgb, var(--secondary) 70%, black);
}
.duo-btn-accent {
    background: var(--accent);
    color: #fff;
    border-bottom-color: color-mix(in srgb, var(--accent) 70%, black);
}
.duo-btn-ghost {
    background: var(--card-bg);
    color: var(--text-main);
    border-color: var(--border-color);
    border-bottom-color: var(--border-color);
}
.duo-btn-danger {
    background: var(--duo-danger);
    color: #fff;
    border-bottom-color: var(--duo-danger-dark);
}
.duo-btn-sm { padding: 0.4rem 0.75rem; font-size: 0.75rem; border-radius: var(--duo-radius-sm); }
.duo-btn-lg { padding: 0.7rem 1.25rem; font-size: 0.95rem; }
.duo-btn-icon {
    width: 2rem;
    height: 2rem;
    padding: 0;
    border-radius: var(--duo-radius-sm);
}

/* ── Inputs ── */
.duo-input,
.duo-select,
.duo-textarea {
    width: 100%;
    background: var(--duo-input-bg);
    border: 2px solid var(--border-color);
    border-bottom-width: 3px;
    border-radius: var(--duo-radius);
    padding: 0.55rem 0.85rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-main);
    outline: none;
    transition: border-color 0.15s;
}
.duo-input:focus,
.duo-select:focus,
.duo-textarea:focus {
    border-color: var(--text-active);
}
.duo-input::placeholder { color: var(--text-muted); }
.duo-label {
    display: block;
    font-size: 0.7rem;
    font-weight: 800;
    color: var(--text-muted);
    margin-bottom: 0.35rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

/* ── Table ── */
.duo-table-wrap {
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: var(--duo-radius-lg);
    box-shadow: 0 var(--duo-depth) 0 var(--border-color);
    overflow: hidden;
}
.duo-table {
    width: 100%;
    font-size: 0.8rem;
    color: var(--text-main);
    text-align: right;
}
.duo-table thead {
    background: color-mix(in srgb, var(--bg-main) 60%, var(--border-color));
    color: var(--text-muted);
    font-size: 0.65rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.duo-table th,
.duo-table td { padding: 0.65rem 1rem; }
.duo-table tbody tr {
    border-bottom: 2px solid var(--border-color);
    transition: background 0.12s;
}
.duo-table tbody tr:hover { background: var(--nav-bg-active); }
.duo-table tbody tr:last-child { border-bottom: none; }

/* ── Badges ── */
.duo-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.15rem 0.5rem;
    border-radius: 999px;
    font-size: 0.65rem;
    font-weight: 800;
    border: 2px solid transparent;
    border-bottom-width: 2px;
}
.duo-badge-success { background: color-mix(in srgb, var(--duo-success) 12%, transparent); color: var(--duo-success); border-color: color-mix(in srgb, var(--duo-success) 25%, transparent); border-bottom-color: var(--duo-success-dark); }
.duo-badge-danger { background: color-mix(in srgb, var(--duo-danger) 12%, transparent); color: var(--duo-danger); border-color: color-mix(in srgb, var(--duo-danger) 25%, transparent); border-bottom-color: var(--duo-danger-dark); }
.duo-badge-primary { background: var(--nav-bg-active); color: var(--text-active); border-color: var(--nav-border-active); }
.duo-badge-warning { background: color-mix(in srgb, var(--duo-warning) 15%, transparent); color: var(--duo-warning-dark); border-color: color-mix(in srgb, var(--duo-warning) 30%, transparent); }

/* ── Modals (fixed overflow) ── */
.duo-modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    background: var(--duo-overlay);
    backdrop-filter: blur(4px);
}
.duo-modal {
    width: 100%;
    max-width: 28rem;
    max-height: min(90vh, 720px);
    display: flex;
    flex-direction: column;
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: var(--duo-radius-lg);
    box-shadow: 0 8px 0 var(--border-color);
    overflow: hidden;
}
.duo-modal.duo-modal-lg { max-width: 36rem; }
.duo-modal-header {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.25rem;
    border-bottom: 2px solid var(--border-color);
}
.duo-modal-title {
    font-size: 1.1rem;
    font-weight: 900;
    color: var(--text-main);
}
.duo-modal-close {
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--duo-radius-sm);
    color: var(--text-muted);
    background: transparent;
    border: 2px solid var(--border-color);
    border-bottom-width: 3px;
    cursor: pointer;
    transition: color 0.12s, background 0.12s;
}
.duo-modal-close:hover { color: var(--text-main); background: var(--nav-bg-active); }
.duo-modal-body {
    flex: 1 1 auto;
    overflow-y: auto;
    padding: 1rem 1.25rem;
    min-height: 0;
}
.duo-modal-footer {
    flex-shrink: 0;
    padding: 0.85rem 1.25rem 1.25rem;
    border-top: 2px solid var(--border-color);
    background: color-mix(in srgb, var(--card-bg) 95%, var(--border-color));
}

/* ── Permission chips ── */
.duo-check-card {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    padding: 0.55rem 0.75rem;
    background: var(--duo-input-bg);
    border: 2px solid var(--border-color);
    border-bottom-width: 3px;
    border-radius: var(--duo-radius);
    cursor: pointer;
    transition: border-color 0.12s, background 0.12s;
}
.duo-check-card:hover { border-color: var(--text-active); }
.duo-check-card input[type="checkbox"] {
    width: 1.1rem;
    height: 1.1rem;
    accent-color: var(--primary);
    flex-shrink: 0;
}
.duo-check-card span {
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--text-main);
}

/* ── Empty state ── */
.duo-empty {
    padding: 3rem 1.5rem;
    text-align: center;
    border: 2px dashed var(--border-color);
    border-radius: var(--duo-radius-lg);
    background: color-mix(in srgb, var(--card-bg) 80%, var(--bg-main));
}
.duo-empty i { font-size: 2.5rem; opacity: 0.2; margin-bottom: 0.75rem; }
.duo-empty p { color: var(--text-muted); font-weight: 700; }

/* ── Alert ── */
.duo-alert {
    padding: 0.65rem 1rem;
    border-radius: var(--duo-radius);
    font-size: 0.8rem;
    font-weight: 700;
    border: 2px solid transparent;
    border-bottom-width: 3px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
        .duo-alert-success { background: color-mix(in srgb, var(--duo-success) 12%, transparent); color: var(--duo-success); border-color: color-mix(in srgb, var(--duo-success) 30%, transparent); border-bottom-color: var(--duo-success-dark); }

/* Stat icon legacy tailwind colors */
[data-theme] .bg-indigo-500\/15 { background: var(--nav-bg-active) !important; }
[data-theme] .text-indigo-400 { color: var(--text-active) !important; }
[data-theme] .bg-emerald-500\/15 { background: color-mix(in srgb, var(--duo-success) 15%, transparent) !important; }
[data-theme] .text-emerald-400 { color: var(--duo-success) !important; }
[data-theme] .bg-orange-500\/15 { background: color-mix(in srgb, var(--secondary) 15%, transparent) !important; }
[data-theme] .text-orange-400 { color: var(--secondary) !important; }
[data-theme] .bg-red-500\/15 { background: color-mix(in srgb, var(--duo-danger) 15%, transparent) !important; }
[data-theme] .text-red-400 { color: var(--duo-danger) !important; }
[data-theme] .bg-pink-500\/10 { background: color-mix(in srgb, var(--accent) 12%, transparent) !important; }
[data-theme] .text-pink-400 { color: var(--accent) !important; }
[data-theme] .bg-blue-500\/10 { background: var(--nav-bg-active) !important; }
[data-theme] .text-blue-400 { color: var(--text-active) !important; }