/* ═══════════════════════════════════════════════
   KOVAT Study Rooms CSS — WS3-002
   Design system compliant • Professional grade
   ═══════════════════════════════════════════════ */

/* ── Study Rooms Tab Container ── */
#tab-study .study-rooms-container {
    padding: var(--spacing-md, 16px);
    max-width: 900px;
    margin: 0 auto;
}

/* ── Header ── */
.study-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}
.study-header h2 {
    font-size: 22px;
    font-weight: 600;
    color: var(--text-primary, #F0F0F8);
    margin: 0;
}
.study-streak-badge {
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--surface-raised, #1A1A22);
    border: 1px solid var(--border, #2A2A38);
    border-radius: 24px;
    padding: 6px 14px;
    font-size: 13px;
    color: var(--accent-yellow, #EAB308);
    font-weight: 500;
}

/* ── Create Button ── */
.study-create-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--accent-blue, #4A7AFF);
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 200ms cubic-bezier(0.34,1.56,0.64,1), box-shadow 200ms ease;
}
.study-create-btn:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 4px 16px rgba(74,122,255,0.3);
}
.study-create-btn:active {
    transform: scale(0.98);
}

/* ── Room Cards ── */
.study-rooms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
}
.study-room-card {
    background: var(--surface, #0F0F14);
    border: 1px solid var(--border, #2A2A38);
    border-radius: 12px;
    padding: 20px;
    cursor: pointer;
    transition: transform 200ms ease, border-color 200ms ease, box-shadow 200ms ease;
}
.study-room-card:hover {
    transform: translateY(-2px);
    border-color: var(--accent-blue, #4A7AFF);
    box-shadow: 0 4px 20px rgba(74,122,255,0.15);
}
.study-room-card .room-icon {
    font-size: 32px;
    margin-bottom: 8px;
}
.study-room-card .room-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary, #F0F0F8);
    margin-bottom: 4px;
}
.study-room-card .room-subject {
    font-size: 13px;
    color: var(--accent-purple, #8B5CF6);
    margin-bottom: 8px;
}
.study-room-card .room-meta {
    display: flex;
    gap: 12px;
    font-size: 12px;
    color: var(--text-secondary, #9090A8);
}
.study-room-card .room-type-badge {
    display: inline-block;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    padding: 2px 8px;
    border-radius: 12px;
    background: var(--surface-raised, #1A1A22);
    color: var(--accent-blue, #4A7AFF);
    margin-top: 8px;
}

/* ── Empty State ── */
.study-empty {
    text-align: center;
    padding: 48px 20px;
    color: var(--text-secondary, #9090A8);
}
.study-empty .empty-icon { font-size: 48px; margin-bottom: 12px; }
.study-empty h3 { font-size: 18px; color: var(--text-primary, #F0F0F8); margin-bottom: 6px; }
.study-empty p { font-size: 14px; margin-bottom: 16px; }

/* ── Room Detail Modal ── */
.study-room-modal {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.75);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: modalFadeIn 200ms ease;
}
.study-room-modal .modal-content {
    background: var(--primary-bg, #050507);
    border: 1px solid var(--border, #2A2A38);
    border-radius: 16px;
    width: 90vw;
    max-width: 700px;
    max-height: 85vh;
    overflow-y: auto;
    padding: 24px;
    animation: modalScaleIn 200ms cubic-bezier(0.34,1.56,0.64,1);
}
.study-room-modal .modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}
.study-room-modal .modal-header h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary, #F0F0F8);
}
.study-room-modal .modal-close {
    background: var(--surface-overlay, #22222C);
    border: none;
    border-radius: 50%;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-secondary, #9090A8);
    font-size: 18px;
    transition: all 200ms ease;
}
.study-room-modal .modal-close:hover {
    background: var(--accent-red, #EF4444);
    color: white;
    transform: rotate(90deg);
}

/* ── Pomodoro Timer ── */
.pomodoro-section {
    background: var(--surface, #0F0F14);
    border: 1px solid var(--border, #2A2A38);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 16px;
    text-align: center;
}
.pomodoro-timer {
    font-size: 56px;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    color: var(--text-primary, #F0F0F8);
    margin: 12px 0;
    letter-spacing: 2px;
}
.pomodoro-timer.break { color: var(--accent-green, #22C55E); }
.pomodoro-label {
    font-size: 13px;
    color: var(--text-secondary, #9090A8);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}
.pomodoro-controls {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-top: 16px;
}
.pomodoro-btn {
    border: none;
    border-radius: 8px;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 200ms ease, box-shadow 200ms ease;
}
.pomodoro-btn:hover { transform: translateY(-1px); }
.pomodoro-btn:active { transform: scale(0.97); }
.pomodoro-btn.start {
    background: var(--accent-green, #22C55E);
    color: #fff;
}
.pomodoro-btn.pause {
    background: var(--accent-yellow, #EAB308);
    color: #000;
}
.pomodoro-btn.reset {
    background: var(--surface-raised, #1A1A22);
    color: var(--text-primary, #F0F0F8);
    border: 1px solid var(--border, #2A2A38);
}

/* ── Ambient Sound Selector ── */
.ambient-section {
    margin-bottom: 16px;
}
.ambient-section h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary, #9090A8);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 1px;
}
.ambient-grid {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}
.ambient-chip {
    border: 1px solid var(--border, #2A2A38);
    border-radius: 24px;
    padding: 6px 14px;
    font-size: 13px;
    cursor: pointer;
    background: var(--surface-raised, #1A1A22);
    color: var(--text-secondary, #9090A8);
    transition: all 200ms ease;
    display: flex;
    align-items: center;
    gap: 4px;
}
.ambient-chip:hover {
    border-color: var(--accent-blue, #4A7AFF);
    color: var(--text-primary, #F0F0F8);
}
.ambient-chip.active {
    border-color: var(--accent-blue, #4A7AFF);
    background: rgba(74,122,255,0.15);
    color: var(--accent-blue, #4A7AFF);
}

/* ── Study Tools Tabs ── */
.study-tools-tabs {
    display: flex;
    gap: 0;
    margin-bottom: 16px;
    border-bottom: 1px solid var(--border, #2A2A38);
}
.study-tools-tab {
    padding: 10px 16px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary, #9090A8);
    cursor: pointer;
    border: none;
    background: none;
    border-bottom: 2px solid transparent;
    transition: all 200ms ease;
}
.study-tools-tab:hover { color: var(--text-primary, #F0F0F8); }
.study-tools-tab.active {
    color: var(--accent-blue, #4A7AFF);
    border-bottom-color: var(--accent-blue, #4A7AFF);
}

/* ── Whiteboard ── */
.whiteboard-container {
    background: var(--surface-raised, #1A1A22);
    border: 1px solid var(--border, #2A2A38);
    border-radius: 12px;
    overflow: hidden;
}
.whiteboard-toolbar {
    display: flex;
    gap: 6px;
    padding: 8px 12px;
    background: var(--surface, #0F0F14);
    border-bottom: 1px solid var(--border, #2A2A38);
}
.whiteboard-tool {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    border: 1px solid var(--border, #2A2A38);
    background: var(--surface-raised, #1A1A22);
    color: var(--text-primary, #F0F0F8);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    transition: all 200ms ease;
}
.whiteboard-tool:hover { border-color: var(--accent-blue, #4A7AFF); }
.whiteboard-tool.active { background: var(--accent-blue, #4A7AFF); border-color: var(--accent-blue, #4A7AFF); }
.whiteboard-color {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 200ms ease;
}
.whiteboard-color.active { border-color: var(--text-primary, #F0F0F8); transform: scale(1.15); }
.whiteboard-canvas-wrap {
    position: relative;
}
#whiteboardCanvas {
    display: block;
    cursor: crosshair;
    width: 100%;
    background: #fff;
}
.whiteboard-clear {
    margin-left: auto;
    font-size: 12px;
    padding: 4px 10px;
    background: var(--accent-red, #EF4444);
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
}

/* ── Shared Notes ── */
.notes-container textarea {
    width: 100%;
    min-height: 200px;
    background: var(--surface-raised, #1A1A22);
    border: 1px solid var(--border, #2A2A38);
    border-radius: 8px;
    padding: 14px;
    color: var(--text-primary, #F0F0F8);
    font-size: 14px;
    font-family: 'Inter', system-ui, sans-serif;
    line-height: 1.6;
    resize: vertical;
    transition: border-color 200ms ease;
}
.notes-container textarea:focus {
    outline: none;
    border-color: var(--accent-blue, #4A7AFF);
}

/* ── Members List ── */
.study-members {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}
.study-member-chip {
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--surface-raised, #1A1A22);
    border: 1px solid var(--border, #2A2A38);
    border-radius: 24px;
    padding: 4px 12px;
    font-size: 13px;
    color: var(--text-primary, #F0F0F8);
}
.study-member-chip img {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    object-fit: cover;
}
.study-member-chip .owner-badge {
    font-size: 10px;
    color: var(--accent-yellow, #EAB308);
}

/* ── Create Room Modal ── */
.create-room-form {
    display: flex;
    flex-direction: column;
    gap: 14px;
}
.create-room-form label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary, #9090A8);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.create-room-form input,
.create-room-form select {
    background: var(--surface-raised, #1A1A22);
    border: 1px solid var(--border, #2A2A38);
    border-radius: 8px;
    padding: 10px 14px;
    color: var(--text-primary, #F0F0F8);
    font-size: 14px;
    transition: border-color 200ms ease;
}
.create-room-form input:focus,
.create-room-form select:focus {
    outline: none;
    border-color: var(--accent-blue, #4A7AFF);
}
.create-room-form select {
    cursor: pointer;
}

/* ── Animations ── */
@keyframes pomodoroPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}
.pomodoro-timer.running {
    animation: pomodoroPulse 2s ease-in-out infinite;
}

/* ── Responsive ── */
@media (max-width: 600px) {
    .study-rooms-grid {
        grid-template-columns: 1fr;
    }
    .study-room-modal .modal-content {
        width: 95vw;
        padding: 16px;
        border-radius: 12px;
    }
    .pomodoro-timer { font-size: 42px; }
    .ambient-grid { justify-content: center; }
}