@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&display=swap');

:root {
    --primary: #6366F1;
    --primary-hover: #4F46E5;
    --primary-light: rgba(99, 102, 241, 0.1);
    
    --secondary: #10B981;
    --secondary-hover: #059669;
    --secondary-light: rgba(16, 185, 129, 0.1);
    
    --danger: #EF4444;
    --danger-hover: #DC2626;
    --danger-light: rgba(239, 68, 68, 0.1);
    
    --warning: #F59E0B;
    --warning-hover: #D97706;
    --warning-light: rgba(245, 158, 11, 0.1);
    
    --bg-color: #F8FAFC;
    --card-bg: rgba(255, 255, 255, 0.85);
    
    --text-main: #0F172A;
    --text-muted: #64748B;
    --border-color: #E2E8F0;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-glow: 0 0 15px rgba(99, 102, 241, 0.3);
}

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

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-color);
    background-image: 
        radial-gradient(at 0% 0%, hsla(242, 85%, 66%, 0.1) 0, transparent 40%), 
        radial-gradient(at 100% 0%, hsla(339,49%,30%,0.05) 0, transparent 40%),
        radial-gradient(at 50% 100%, hsla(160, 84%, 39%, 0.1) 0, transparent 40%);
    background-attachment: fixed;
    color: var(--text-main);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 2rem;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 3rem;
    animation: fadeInDown 0.6s ease-out;
}

.header h1 {
    font-size: 2.75rem;
    font-weight: 800;
    background: linear-gradient(135deg, #0F172A 0%, #334155 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
    letter-spacing: -0.025em;
}

.header p {
    color: var(--text-muted);
    font-size: 1.15rem;
    font-weight: 400;
}

/* Glassmorphism Cards */
.card {
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.5);
    border-radius: 1.25rem;
    padding: 2rem;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    margin-bottom: 2rem;
    animation: fadeIn 0.5s ease-out;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.card-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-main);
}

/* Forms & Inputs */
.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 0.5rem;
}

.form-control {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 1.5px solid #CBD5E1;
    border-radius: 0.75rem;
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.25s ease;
    background: rgba(255, 255, 255, 0.9);
    color: var(--text-main);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px var(--primary-light);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 1.75rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 0.75rem;
    border: none;
    cursor: pointer;
    transition: all 0.25s ease;
    gap: 0.5rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-hover) 100%);
    color: white;
    box-shadow: 0 4px 6px rgba(99, 102, 241, 0.25);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(99, 102, 241, 0.35);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger) 0%, var(--danger-hover) 100%);
    color: white;
    box-shadow: 0 4px 6px rgba(239, 68, 68, 0.25);
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(239, 68, 68, 0.35);
}

.btn-success {
    background: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-hover) 100%);
    color: white;
    box-shadow: 0 4px 6px rgba(16, 185, 129, 0.25);
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(16, 185, 129, 0.35);
}

.btn-block {
    width: 100%;
}

/* Tabs */
.tabs {
    display: flex;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 2rem;
    overflow-x: auto;
    gap: 1rem;
}

.tab-btn {
    padding: 1rem 1.5rem;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.3s ease;
    border-radius: 0.5rem 0.5rem 0 0;
}

.tab-btn:hover {
    color: var(--primary);
    background: var(--primary-light);
}

.tab-btn.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.tab-content {
    display: none;
    animation: fadeIn 0.4s ease-out;
}

.tab-content.active {
    display: block;
}

/* Calendar Styles */
.calendar-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 1.5rem;
    text-align: center;
}

.calendar-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    table-layout: fixed;
    background: white;
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.calendar-table th {
    background-color: #F1F5F9;
    padding: 1rem;
    font-weight: 700;
    color: var(--text-main);
    border-bottom: 1px solid var(--border-color);
    text-align: center;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.05em;
}

.calendar-table td {
    border-bottom: 1px solid var(--border-color);
    border-right: 1px solid var(--border-color);
}

.calendar-day {
    padding: 0.5rem;
    height: 110px;
    vertical-align: top;
    transition: background-color 0.2s;
}

.calendar-day:hover {
    background-color: #F8FAFC;
}

.empty-day {
    background-color: #F8FAFC;
}

.day-number {
    font-weight: 700;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    font-size: 1rem;
    display: inline-block;
    width: 28px;
    height: 28px;
    line-height: 28px;
    text-align: center;
    border-radius: 50%;
}

.calendar-day.today .day-number {
    background-color: var(--primary);
    color: white;
    box-shadow: var(--shadow-glow);
}

.leave-badge {
    color: white;
    padding: 0.35rem 0.5rem;
    border-radius: 0.35rem;
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 0.35rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    animation: slideIn 0.3s ease;
    /* Inline background-color will override the default below */
    background-color: var(--danger);
}

/* Alerts */
.alert {
    padding: 1.25rem;
    border-radius: 0.75rem;
    margin-bottom: 1.5rem;
    border-left: 5px solid;
    font-weight: 500;
    animation: slideIn 0.3s ease;
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

.alert-error {
    background-color: #FEF2F2;
    border-color: var(--danger);
    color: #991B1B;
}

.alert-warning {
    background-color: #FFFBEB;
    border-color: var(--warning);
    color: #92400E;
}

.alert-success {
    background-color: #ECFDF5;
    border-color: var(--secondary);
    color: #065F46;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

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

/* Grids */
.grid-2 {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

.grid-3 {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

@media (min-width: 768px) {
    .grid-2 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: repeat(3, 1fr); }
}

/* List Styles */
.staff-list {
    list-style: none;
}

.staff-list li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    font-weight: 500;
}

.staff-list li:last-child {
    border-bottom: none;
}

.staff-list.danger li::before { 
    content: "🔴"; 
    margin-right: 0.75rem;
    font-size: 0.85rem;
}

.staff-list.success li::before { 
    content: "🟢"; 
    margin-right: 0.75rem;
    font-size: 0.85rem;
}

/* Layout for Admin */
.admin-layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 280px;
    background: #0F172A;
    color: white;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
    z-index: 10;
}

.sidebar h2 {
    font-weight: 800;
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.main-content {
    flex: 1;
    padding: 3rem;
    max-width: calc(100% - 280px);
    overflow-y: auto;
}

.table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin-top: 1.5rem;
    border-radius: 0.75rem;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.table th, .table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th { 
    background: #F8FAFC; 
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.table tr:last-child td {
    border-bottom: none;
}

.table tr:hover td {
    background-color: #F1F5F9;
}