::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #555;
}

.custom-scrollbar::-webkit-scrollbar { width: 6px; height: 6px; }
.custom-scrollbar::-webkit-scrollbar-track { background: #f9fafb; }
.custom-scrollbar::-webkit-scrollbar-thumb { background: #d1d5db; border-radius: 4px; }
.custom-scrollbar::-webkit-scrollbar-thumb:hover { background: #9ca3af; }

@media print {
    .no-print { display: none !important; }
    .print-only { display: block !important; }
    body { background: white; }
    .report-card { box-shadow: none; border: 2px solid #000; }
    
}

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

.animate-fade-in { animation: fadeIn 0.3s ease-out; }

.glass {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

:root {
    --primary: #1e40af;
    --primary-dark: #1e3a8a;
    --secondary: #f59e0b;
    --success: #10b981;
    --danger: #ef4444;
}

.grade-excellent { color: #059669; }
.grade-good { color: #2563eb; }
.grade-average { color: #d97706; }
.grade-poor { color: #dc2626; }

.table-container {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.hover-card { transition: all 0.3s ease; }
.hover-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
}

.spinner {
    border: 3px solid #f3f3f3;
    border-top: 3px solid #3498db;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0%   { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.modal-backdrop {
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 12px 24px;
    border-radius: 8px;
    color: white;
    font-weight: 500;
    z-index: 1000;
    max-width: 300px;
    word-wrap: break-word;
    animation: slideIn 0.3s ease-out;
}

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

.toast.success { background-color: #10b981; }
.toast.error   { background-color: #ef4444; }
.toast.info    { background-color: #3b82f6; }

.sidebar-mobile { transform: translateX(-100%); transition: transform 0.3s ease; }
.sidebar-mobile.open { transform: translateX(0); }

.rank-1 { background: linear-gradient(135deg, #ffd700, #ffed4e); color: #000; }
.rank-2 { background: linear-gradient(135deg, #c0c0c0, #e8e8e8); color: #000; }
.rank-3 { background: linear-gradient(135deg, #cd7f32, #daa520); color: #fff; }

.real-time-pulse,
.real-time-indicator {
    animation: realTimePulse 2s infinite;
}

@keyframes realTimePulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
    50%       { box-shadow: 0 0 0 10px rgba(16, 185, 129, 0); }
}

.grade-input-existing {
    background-color: #f3f4f6 !important;
    cursor: not-allowed !important;
    color: #6b7280 !important;
}

.grade-input-new {
    background-color: #ffffff !important;
    border-color: #10b981 !important;
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1) !important;
}

.grade-input-new:focus {
    border-color: #059669 !important;
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2) !important;
}

.history-tooltip { position: relative; cursor: help; }
.history-tooltip:hover::after {
    content: attr(data-history);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: #1f2937;
    color: white;
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 12px;
    white-space: nowrap;
    z-index: 100;
}

.connection-status { transition: all 0.3s ease; }
.connection-status.connected    { background-color: #10b981; }
.connection-status.disconnected { background-color: #ef4444; }

header.sticky { z-index: 50 !important; }

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    max-width: 400px;
    text-align: center;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

/* Custom Scrollbar for Sidebar Scalability */
.custom-scrollbar {
    scrollbar-width: thin; /* Firefox */
    scrollbar-color: #cbd5e1 transparent; /* Firefox */
}

.custom-scrollbar::-webkit-scrollbar {
    width: 4px;
}

.custom-scrollbar::-webkit-scrollbar-track {
    background: transparent;
}

.custom-scrollbar::-webkit-scrollbar-thumb {
    background-color: #cbd5e1; /* Tailwind slate-300 */
    border-radius: 10px;
}

/* Dark mode scrollbar support */
.dark .custom-scrollbar::-webkit-scrollbar-thumb {
    background-color: #475569; /* Tailwind slate-600 */
}

/* === GradeBook: Excel-style class record === */
.gb-col-item  { width: 68px; min-width: 68px; max-width: 68px; }
.gb-col-total { width: 78px; min-width: 78px; }
.gb-col-wtd   { width: 58px; min-width: 58px; }
.gb-score-input { width: 100%; text-align: center; }

.gb-section-ww-start { border-left: 2px solid #2563eb !important; }
.gb-section-pt-start { border-left: 2px solid #16a34a !important; }
.gb-section-me-start { border-left: 2px solid #ea580c !important; }
.gb-initial-start    { border-left: 2px solid #9333ea !important; }

/* === Academic Heat Map: grade color bands === */
.hm-band-red    { background-color: #fecaca; color: #7f1d1d; } /* 60-74 */
.hm-band-orange { background-color: #fed7aa; color: #7c2d12; } /* 75-77 */
.hm-band-lorange{ background-color: #ffedd5; color: #9a3412; } /* 78-80 */
.hm-band-lgreen { background-color: #dcfce7; color: #166534; } /* 81-89 */
.hm-band-yellow { background-color: #fef9c3; color: #713f12; } /* 90-100 */
.hm-band-empty  { background-color: #f9fafb; color: #9ca3af; }

/* === Announcements: lock rich-text content to Arial wherever it renders === */
.ql-editor {
    font-family: Arial, Helvetica, sans-serif;
}
.ql-editor.announcement-content {
    padding: 0;
}

/* Fallback in case the Tailwind CDN build in use predates core line-clamp utilities */
.line-clamp-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.line-clamp-3 {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}