:root {
    --bg-dark: #070B19;
    --bg-panel: rgba(18, 24, 43, 0.6);
    --border-glass: rgba(255, 255, 255, 0.08);
    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    
    --accent-primary: #4f46e5;
    --accent-primary-hover: #6366f1;
    --accent-glow: rgba(79, 70, 229, 0.4);
    
    --success: #10b981;
    --danger: #f43f5e;
    --warning: #f59e0b;
    
    --font-main: 'Inter', sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-main);
    min-height: 100vh;
    overflow: hidden;
    background-image: 
        radial-gradient(circle at 15% 50%, rgba(79, 70, 229, 0.15), transparent 25%),
        radial-gradient(circle at 85% 30%, rgba(236, 72, 153, 0.15), transparent 25%);
    animation: bgPulse 15s ease-in-out infinite alternate;
}

@keyframes bgPulse {
    0% { background-position: 0% 0%; }
    100% { background-position: 100% 100%; }
}

.glass-panel {
    background: var(--bg-panel);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-glass);
    border-radius: 20px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3), inset 0 1px 0 rgba(255,255,255,0.1);
}

.dashboard-container {
    display: flex;
    height: 100vh;
    padding: 1.5rem;
    gap: 1.5rem;
}

/* --- Sidebar --- */
.sidebar {
    width: 320px;
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
    gap: 2rem;
    flex-shrink: 0;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    color: var(--accent-primary);
}

.brand h1 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

h2 {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-weight: 600;
}

/* Bot Control */
.bot-control-section {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
    background: rgba(0,0,0,0.2);
    padding: 0.75rem 1rem;
    border-radius: 8px;
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    display: inline-block;
}

.dot.online { background-color: var(--success); box-shadow: 0 0 8px var(--success); }
.dot.offline { background-color: var(--danger); box-shadow: 0 0 8px var(--danger); }
.dot.unknown { background-color: var(--warning); }

/* Next Run Indicator */
.next-run-indicator {
    background: rgba(0,0,0,0.2);
    padding: 0.6rem 1rem;
    border-radius: 8px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    border: 1px solid var(--border-glass);
}
.next-run-indicator i {
    color: var(--accent-primary);
}
.next-run-indicator #nextRunTime {
    font-family: monospace;
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--text-primary);
    letter-spacing: 1px;
}
.next-run-indicator #nextRunPeriod {
    font-size: 0.75rem;
    opacity: 0.8;
}
.control-buttons {
    display: flex;
    gap: 0.5rem;
}

.btn {
    padding: 0.75rem 1rem;
    border: none;
    border-radius: 12px;
    font-family: inherit;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    filter: grayscale(1);
}

.btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), #3b82f6);
    color: white;
    box-shadow: 0 4px 15px var(--accent-glow);
}
.btn-primary:hover:not(:disabled) { 
    background: linear-gradient(135deg, var(--accent-primary-hover), #60a5fa);
    box-shadow: 0 6px 20px var(--accent-glow);
}

.btn-danger {
    background: rgba(244, 63, 94, 0.15);
    color: #fda4af;
    border: 1px solid rgba(244, 63, 94, 0.3);
}
.btn-danger:hover:not(:disabled) { background: rgba(244, 63, 94, 0.25); }

.btn-accent {
    background: linear-gradient(135deg, #8b5cf6, #d946ef);
    color: white;
    box-shadow: 0 4px 15px rgba(217, 70, 239, 0.3);
}
.btn-accent:hover:not(:disabled) {
    background: linear-gradient(135deg, #a78bfa, #e879f9);
    box-shadow: 0 6px 20px rgba(217, 70, 239, 0.5);
}

.btn-icon {
    flex: none;
    width: 42px;
    background: linear-gradient(135deg, var(--accent-primary), #3b82f6);
    color: white;
}

/* Schedule / Days Selection */
.schedule-section {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.days-container {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.day-checkbox {
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0.2);
    padding: 0.4rem 0.6rem;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    border: 1px solid var(--border-glass);
    transition: all 0.2s;
    user-select: none;
    color: var(--text-secondary);
}

.day-checkbox:hover {
    background: rgba(255,255,255,0.05);
    color: var(--text-primary);
}

.day-checkbox.active {
    background: var(--accent-primary);
    border-color: var(--accent-primary-hover);
    color: white;
}

.day-checkbox input { 
    display: none; 
}

/* Student Management */
.student-management-section {
    display: flex;
    flex-direction: column;
    flex: 1;
    overflow: hidden;
}

.add-form {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.add-form input {
    flex: 1;
    background: rgba(0,0,0,0.3);
    border: 1px solid var(--border-glass);
    border-radius: 12px;
    padding: 0 1rem;
    color: white;
    font-family: inherit;
    outline: none;
    transition: all 0.3s;
}
.add-form input:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 2px var(--accent-glow);
}

.student-list-container {
    flex: 1;
    overflow-y: auto;
    padding-right: 0.5rem;
}

/* Custom Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.2); }

.student-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.student-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(255,255,255,0.03);
    padding: 0.75rem 1rem;
    border-radius: 12px;
    border: 1px solid transparent;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.student-item:hover {
    background: rgba(255,255,255,0.08);
    border-color: var(--border-glass);
    transform: translateX(4px);
}

.student-item.absent {
    opacity: 0.5;
}
.student-item.absent .sid-text {
    text-decoration: line-through;
}

.student-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
}

/* Custom Checkbox */
.checkbox-wrapper input {
    display: none;
}
.checkbox-wrapper .checkmark {
    width: 20px;
    height: 20px;
    border: 2px solid var(--text-secondary);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}
.checkbox-wrapper input:checked + .checkmark {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
}
.checkbox-wrapper input:checked + .checkmark::after {
    content: '\f00c';
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    color: white;
    font-size: 12px;
}

.delete-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.2s, color 0.2s;
}
.student-item:hover .delete-btn {
    opacity: 1;
}
.delete-btn:hover {
    color: var(--danger);
}

.dropdown-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), color 0.2s;
    padding: 0.25rem;
}
.dropdown-btn:hover {
    color: var(--accent-primary);
}

/* --- Timetable Grid --- */
.timetable-section {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
}
.timetable-header {
    margin-bottom: 1rem;
}
.timetable-subtitle {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}
.timetable-grid-wrapper {
    overflow-x: auto;
    padding-bottom: 0.5rem;
}
.timetable-grid {
    display: grid;
    gap: 0.5rem;
    min-width: 750px;
}
.tt-header-cell {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-end;
    color: var(--text-secondary);
    padding: 0.5rem;
    text-align: center;
}
.day-label-header {
    font-weight: 700;
    justify-content: flex-end;
}
.tt-period-num {
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-primary);
}
.tt-time {
    font-size: 0.7rem;
    opacity: 0.7;
    margin-top: 0.2rem;
}
.tt-day-label {
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--text-primary);
    background: rgba(255,255,255,0.02);
    border-radius: 8px;
    border: 1px solid var(--border-glass);
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}
.tt-day-label:hover {
    background: rgba(255,255,255,0.08);
    transform: scale(1.05);
    z-index: 2;
}
.tt-cell {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    min-height: 55px;
    text-align: center;
    border: 1px solid var(--border-glass);
    user-select: none;
}
.tt-cell:hover:not(.empty) {
    transform: scale(1.05);
    z-index: 2;
}
.tt-cell.empty {
    background: transparent;
    border: none;
    cursor: default;
}
.tt-cell.enabled {
    background: linear-gradient(135deg, var(--accent-primary), #3b82f6);
    color: white;
    box-shadow: 0 4px 15px var(--accent-glow);
    border-color: transparent;
}
.tt-cell.enabled:hover {
    box-shadow: 0 6px 20px var(--accent-glow);
}
.tt-cell.disabled {
    background: rgba(0,0,0,0.3);
    color: var(--text-secondary);
}
.tt-cell.disabled:hover {
    background: rgba(255,255,255,0.08);
}
.tt-subject {
    font-size: 0.75rem;
    font-weight: 600;
    line-height: 1.2;
}
.tt-tick {
    position: absolute;
    top: -5px;
    right: -5px;
    background: var(--bg-dark);
    color: #38bdf8;
    border-radius: 50%;
    font-size: 0.9rem;
    padding: 2px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.5);
    border: 1px solid var(--border-glass);
}

/* --- Main Content --- */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    overflow: hidden;
}

.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 2rem;
}
.main-header h2 {
    margin: 0;
    color: var(--text-primary);
}
.pulse-icon {
    color: var(--success);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { opacity: 0.5; transform: scale(0.95); }
    50% { opacity: 1; transform: scale(1.05); }
    100% { opacity: 0.5; transform: scale(0.95); }
}

.feed-container {
    flex: 1;
    padding: 1.5rem;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.feed-empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-secondary);
    opacity: 0.5;
    gap: 1rem;
}
.feed-empty-state i { font-size: 3rem; }

.feed-item {
    padding: 1rem 1.5rem;
    border-radius: 12px;
    background: rgba(255,255,255,0.02);
    border-left: 4px solid var(--text-secondary);
    animation: slideIn 0.3s ease-out forwards;
}

@keyframes slideIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.feed-item.success { border-left-color: var(--success); background: rgba(16, 185, 129, 0.05); }
.feed-item.error { border-left-color: var(--danger); background: rgba(239, 68, 68, 0.05); }

.feed-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}
.feed-content {
    font-weight: 500;
    line-height: 1.4;
}
.feed-content .sid {
    color: var(--accent-primary);
    font-weight: 700;
}

/* --- Toast Notifications --- */
.toast-container {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    z-index: 1000;
}

.toast {
    background: var(--bg-panel);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-glass);
    padding: 1rem 1.5rem;
    border-radius: 8px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.3);
    display: flex;
    align-items: center;
    gap: 1rem;
    animation: toastSlideIn 0.3s ease-out forwards;
    min-width: 300px;
}
.toast.success i { color: var(--success); }
.toast.error i { color: var(--danger); }

.toast-content h4 { font-size: 0.9rem; margin-bottom: 0.25rem; }
.toast-content p { font-size: 0.8rem; color: var(--text-secondary); }

@keyframes toastSlideIn {
    from { opacity: 0; transform: translateX(100%); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes toastSlideOut {
    from { opacity: 1; transform: translateX(0); }
    to { opacity: 0; transform: translateX(100%); }
}

/* --- Modals --- */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--bg-panel);
    border: 1px solid var(--border-glass);
    border-radius: 16px;
    padding: 2rem;
    width: 90%;
    max-width: 400px;
    position: relative;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    animation: slideUp 0.3s ease-out;
}
.modal-content.settings-panel {
    max-width: 500px;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.close-modal {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.2rem;
    cursor: pointer;
    transition: color 0.2s;
}
.close-modal:hover {
    color: var(--danger);
}

.modal-content h3 {
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    font-size: 1.25rem;
}

.modal-body {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.modal-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    border: 1px solid var(--border-glass);
    background: rgba(0, 0, 0, 0.3);
    color: var(--text-primary);
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s;
}
.modal-input:focus {
    border-color: var(--accent-primary);
}

.modal-textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    border: 1px solid var(--border-glass);
    background: rgba(0, 0, 0, 0.3);
    color: var(--text-primary);
    font-family: monospace;
    font-size: 0.85rem;
    min-height: 100px;
    resize: vertical;
    outline: none;
    transition: border-color 0.2s;
}
.modal-textarea:focus {
    border-color: var(--accent-primary);
}

.profile-icon:hover i {
    color: var(--text-primary) !important;
}