/* ========================================
   TASKS PAGE - CSS VARIABLES VERSION
   ======================================== */

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 40px 20px;
    background-color: var(--bg-primary);
    transition: background-color var(--transition-normal);
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.header h1 {
    font-size: 32px;
    font-weight: 600;
    color: var(--text-primary);
}

.add-task-btn {
    background: var(--btn-primary-bg);
    color: var(--btn-primary-text);
    border: none;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 15px;
    font-weight: 500;
    transition: background var(--transition-fast);
}

.add-task-btn:hover {
    background: var(--btn-primary-hover);
}

.stats {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 30px;
}

/* ========================================
   ADD TASK FORM
   ======================================== */

.add-task-form {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: var(--shadow-sm);
    display: none;
    transition: background-color var(--transition-normal);
}

.add-task-form.active {
    display: block;
}

.form-group {
    margin-bottom: 20px;
}

.task-input {
    width: 100%;
    padding: 15px;
    border: 1px solid var(--input-border);
    border-radius: var(--radius-md);
    font-size: 16px;
    font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--input-bg);
    color: var(--text-primary);
    transition: background var(--transition-fast), border-color var(--transition-fast);
}

.task-input:focus {
    outline: none;
    border-color: var(--input-focus-border);
    background: var(--input-focus-bg);
}

.task-input::placeholder {
    color: var(--input-placeholder);
}

.form-row {
    display: flex;
    gap: 15px;
    align-items: center;
    flex-wrap: wrap;
}

.priority-group,
.date-group,
.category-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.priority-group label,
.date-group label,
.category-group label {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 500;
}

.priority-btns {
    display: flex;
    gap: 8px;
}

.priority-btn {
    padding: 8px 16px;
    border: 1px solid var(--input-border);
    background: var(--card-bg);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 14px;
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.priority-btn:hover {
    background: var(--bg-hover);
}

.priority-btn.active {
    background: var(--btn-primary-bg);
    color: var(--btn-primary-text);
    border-color: var(--btn-primary-bg);
}

.date-input,
.category-select {
    padding: 8px 12px;
    border: 1px solid var(--input-border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--card-bg);
    color: var(--text-primary);
    cursor: pointer;
    transition: background var(--transition-fast), border-color var(--transition-fast);
}

.date-input:focus,
.category-select:focus {
    outline: none;
    border-color: var(--input-focus-border);
    background: var(--input-focus-bg);
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 20px;
}

.cancel-btn,
.submit-btn {
    padding: 10px 24px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.cancel-btn {
    background: transparent;
    color: var(--text-secondary);
}

.cancel-btn:hover {
    background: var(--bg-hover);
}

.submit-btn {
    background: var(--btn-secondary-bg);
    color: var(--btn-secondary-text);
}

.submit-btn:hover {
    background: var(--btn-secondary-hover);
}

/* ========================================
   FILTERS
   ======================================== */

.filters {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 20px;
    border: none;
    background: var(--card-bg);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.filter-btn.active {
    background: var(--btn-primary-bg);
    color: var(--btn-primary-text);
}

.filter-btn:hover:not(.active) {
    background: var(--bg-hover);
}

/* ========================================
   TASKS LIST
   ======================================== */

.tasks-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.task-item {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
    position: relative;
}

.task-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: transparent;
    transition: background var(--transition-normal);
    border-radius: var(--radius-lg) 0 0 var(--radius-lg);
}

.task-item:hover {
    box-shadow: var(--shadow-md);
}

.task-item:hover::before {
    background: var(--btn-primary-bg);
}

.task-checkbox {
    width: 24px;
    height: 24px;
    border: 2px solid var(--border-primary);
    border-radius: var(--radius-full);
    cursor: pointer;
    flex-shrink: 0;
    transition: all var(--transition-fast);
    position: relative;
}

.task-checkbox:hover {
    border-color: var(--btn-primary-bg);
}

.task-checkbox.checked {
    background: var(--btn-primary-bg);
    border-color: var(--btn-primary-bg);
}

.task-checkbox.checked::after {
    content: '✓';
    position: absolute;
    color: var(--btn-primary-text);
    font-size: 14px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.task-content {
    flex: 1;
}

.task-title {
    font-size: 16px;
    margin-bottom: 8px;
    color: var(--text-primary);
    transition: color var(--transition-fast);
}

.task-title.completed {
    text-decoration: line-through;
    color: var(--text-light);
}

.task-meta {
    display: flex;
    gap: 15px;
    font-size: 13px;
    color: var(--text-secondary);
    align-items: center;
}

.task-date::before {
    content: '📅';
    margin-right: 4px;
}

.task-category,
.task-subject-badge {
    background: var(--bg-hover);
    padding: 2px 10px;
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    transition: background var(--transition-fast);
}

.task-subject-badge {
    padding: 4px 12px;
    border-radius: var(--radius-lg);
    font-size: 11px;
    font-weight: 600;
    display: inline-block;
}

.task-actions {
    display: flex;
    gap: 10px;
}

.task-action-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 18px;
    padding: 5px;
    opacity: 0.6;
    transition: opacity var(--transition-fast);
    color: var(--text-primary);
}

.task-action-btn:hover {
    opacity: 1;
}

/* ========================================
   PRIORITY BADGES
   ======================================== */

.task-priority {
    padding: 3px 8px;
    border-radius: var(--radius-md);
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.priority-low {
    background: #e8f5e9;
    color: #2e7d32;
}

.priority-medium {
    background: #fff3e0;
    color: #e65100;
}

.priority-high {
    background: #ffebee;
    color: #c62828;
}

/* Dark theme priority colors */
body.dark-theme .priority-low {
    background: #1a3d1a;
    color: #66bb6a;
}

body.dark-theme .priority-medium {
    background: #3d2a1a;
    color: #ffa726;
}

body.dark-theme .priority-high {
    background: #3d1a1a;
    color: #ff6b6b;
}

/* ========================================
   EMPTY STATE
   ======================================== */

.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-light);
}

.empty-state h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: var(--text-secondary);
}

/* ========================================
   SUBJECT-LINKED INDICATORS
   ======================================== */

.st-list-row .st-row-info span[style*="color:#007AFF"] {
    margin-left: 6px;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.st-list-row:has(span[style*="color:#007AFF"]) {
    border-left: 3px solid #007AFF;
    padding-left: 17px;
}

/* ========================================
   SUCCESS MESSAGE
   ======================================== */

.task-saved-message {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: var(--btn-primary-bg);
    color: var(--btn-primary-text);
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-size: 14px;
    animation: slideIn 0.3s, slideOut 0.3s 2.7s;
    z-index: 1000;
    box-shadow: var(--shadow-lg);
}

@keyframes slideIn {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOut {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(400px);
        opacity: 0;
    }
}

/* ========================================
   LOADING STATE
   ======================================== */

.tasks-list.loading {
    opacity: 0.5;
    pointer-events: none;
}

/* ========================================
   RESPONSIVE
   ======================================== */

@media (max-width: 768px) {
    .header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }

    .form-row {
        flex-direction: column;
        align-items: stretch;
    }

    .priority-group,
    .date-group,
    .category-group {
        flex-direction: column;
        align-items: flex-start;
    }

    .task-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
    }

    .task-subject-badge {
        margin-right: 0;
        margin-top: 4px;
    }

    .filter-btn {
        font-size: 12px;
        padding: 8px 12px;
    }
}