:root {
    --primary: #4f46e5;
    --primary-light: #818cf8;
    --primary-dark: #3730a3;
    --secondary: #f8fafc;
    --bg-main: #f1f5f9;
    --surface: #ffffff;
    --border: #e2e8f0;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --danger: #ef4444;
    --danger-light: #fee2e2;
    --success: #22c55e;
    --success-light: #dcfce7;
    --warning: #f59e0b;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-glow: 0 0 15px rgba(79, 70, 229, 0.3);
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-full: 9999px;
}

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

body {
    font-family: 'Inter', 'Prompt', sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
}

/* Typography Utility */
.text-primary { color: var(--primary); }
.text-primary-light { color: var(--primary-light); }
.text-white { color: white; }
.text-lg { font-size: 1.125rem; }
.text-sm { font-size: 0.875rem; }

/* Flex & Layout */
.flex-1 { flex: 1; }
.w-32 { width: 8rem; }
.w-36 { width: 9rem; }
.mr-auto { margin-right: auto; }
.mt-1 { margin-top: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-4 { margin-bottom: 1rem; }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    border: 1px solid transparent;
    font-size: 0.875rem;
}
.btn-primary {
    background: var(--primary);
    color: white;
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: var(--shadow-glow); }
.btn-secondary {
    background: white;
    color: var(--text-main);
    border-color: var(--border);
}
.btn-secondary:hover { background: var(--bg-main); }
.btn-danger {
    background: white;
    color: var(--danger);
    border-color: var(--danger-light);
}
.btn-danger:hover { background: var(--danger-light); }
.btn-large {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
}
.icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-md);
    background: white;
    border: 1px solid var(--border);
    color: var(--text-main);
    cursor: pointer;
    transition: all 0.2s;
}
.icon-btn:hover { background: var(--bg-main); }

/* Badges */
.badge {
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    display: inline-block;
    white-space: nowrap;
}
.badge.outline {
    background: white;
    border: 1px solid var(--border);
    color: var(--text-main);
}
.badge.primary { background: var(--primary-light); color: white; }
.badge.secondary { background: var(--secondary); color: var(--text-muted); }

/* Forms */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}
.form-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
}
.form-control {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-family: inherit;
    transition: border-color 0.2s;
}
.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}
.form-row {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}
.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
    cursor: pointer;
    font-size: 0.9rem;
}

.station-checkboxes {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 0.5rem;
    margin-top: 0.5rem;
    background: var(--secondary);
    padding: 0.75rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
}

/* Glass Panel */
.glass-panel {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

/* Layout */
#app {
    display: flex;
    flex-direction: column;
    height: 100vh;
}
@media (min-width: 1301px) {
    #app { flex-direction: row; }
}

/* Sidebar */
.sidebar {
    width: 250px;
    background: #0f172a;
    color: white;
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    transition: transform 0.3s ease;
    z-index: 50;
}
@media (max-width: 1300px) {
    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        bottom: 0;
        transform: translateX(-100%);
    }
    .sidebar.active { transform: translateX(0); }
}
.logo {
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}
.logo h2 { font-family: 'Outfit', sans-serif; font-size: 1.5rem; }
.logo-icon-wrapper {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: var(--radius-md);
    padding: 0.4rem;
    display: flex;
    box-shadow: var(--shadow-glow);
}

.nav-section { margin-top: 1.5rem; }
.nav-section-title {
    padding: 0 1.5rem;
    font-size: 0.75rem;
    text-transform: uppercase;
    color: #94a3b8;
    font-weight: 600;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}
.nav-links { list-style: none; }
.nav-links li { margin: 0.25rem 1rem; }
.nav-btn {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border: none;
    background: transparent;
    color: #cbd5e1;
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}
.nav-btn:hover { background: rgba(255,255,255,0.05); color: white; }
.nav-btn.active {
    background: linear-gradient(90deg, rgba(79,70,229,0.2) 0%, transparent 100%);
    color: white;
    border-left: 3px solid var(--primary);
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

/* Mobile Header */
.mobile-header {
    display: none;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    background: #0f172a;
    color: white;
}
@media (max-width: 1300px) {
    .mobile-header { display: flex; }
    .global-actions { display: none !important; }
}
.mobile-menu-btn {
    background: transparent;
    border: none;
    color: white;
    cursor: pointer;
}
.header-left { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; }
.global-actions { display: flex; align-items: center; gap: 0.5rem; }
.week-nav { display: flex; align-items: center; gap: 0.5rem; margin-left: 0; }

/* Main Content */
.main-content {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
    background: var(--bg-main);
    position: relative;
}

/* View Section */
.view-section {
    display: flex;
    flex-direction: column;
    height: 100%;
}
.view-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}
.view-title { font-size: 1.5rem; color: var(--text-main); font-weight: 700; }

.mobile-actions-toggle { display: none; }
.action-buttons-group { display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap; }

@media (max-width: 1300px) {
    .view-header-top-row {
        position: fixed;
        top: 0.8rem;
        left: 4rem;
        width: auto !important;
        z-index: 1050;
    }
    .view-header-top-row .view-title { display: none !important; }
    .view-header-top-row select {
        background-color: rgba(255,255,255,0.1) !important;
        color: white !important;
        border: 1px solid rgba(255,255,255,0.2) !important;
    }
    .view-header-top-row select option { color: black !important; }
    .mobile-actions-toggle { 
        display: flex; 
        background-color: rgba(255,255,255,0.1); 
        color: white; 
        border-color: rgba(255,255,255,0.2); 
    }
    .mobile-actions-toggle:hover { background-color: rgba(255,255,255,0.2); color: white; }
    .action-buttons-group {
        display: none;
        flex-direction: column;
        align-items: stretch;
        width: 100%;
        background: var(--surface);
        padding: 1rem;
        border: 1px solid var(--border);
        border-radius: var(--radius-md);
        margin-top: 0.5rem;
    }
    .action-buttons-group.show { display: flex !important; }
    .action-buttons-group button { justify-content: center; }
}

/* Panels */
.main-panel {
    display: flex;
    gap: 1.5rem;
    flex: 1;
    min-height: 0;
    padding: 1rem;
}
.schedule-grid-wrapper {
    flex: 0 1 auto;
    min-width: 0;
    overflow: auto;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: white;
}
.warnings-sidebar {
    flex: 0 0 280px;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}
@media (max-width: 1300px) {
    .warnings-sidebar { display: none !important; }
}
.warning-section {
    background: var(--secondary);
    padding: 1rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
}
.section-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.95rem;
    margin-bottom: 0.75rem;
}

/* Schedule Table */
.schedule-table {
    width: max-content;
    margin: 0;
    table-layout: fixed;
    border-collapse: collapse;
    font-size: 0.85rem;
}
.schedule-table th, .schedule-table td {
    border: 1px solid var(--border);
    padding: 0.15rem 0.1rem;
    text-align: center;
}
.schedule-table thead th {
    background: #1e293b;
    color: white;
    position: sticky;
    top: 0;
    z-index: 10;
    font-weight: 600;
    border-color: #334155;
}
.station-cell {
    background: #1e293b;
    color: white;
    font-weight: 700;
    width: 35px;
    white-space: nowrap;
    border-color: #334155;
}
.shift-cell {
    width: 90px;
    background: #e2e8f0;
    font-weight: 600;
    font-size: 0.8rem;
    color: #334155;
    white-space: nowrap;
    padding: 0.15rem 0.3rem !important;
}
.shift-data-cell {
    width: 70px;
    min-width: 70px;
    max-width: 70px;
    height: 32px;
    cursor: pointer;
    transition: background 0.1s;
    vertical-align: middle;
}
.shift-data-cell:hover { background: #f1f5f9; }
.empty-shift-cell { background: #fffbfa; }
.cell-flex-wrapper {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    height: 100%;
    justify-content: center;
}
.sched-emp-badge {
    background: transparent;
    padding: 0.15rem 0;
    font-size: 1.05rem;
    font-family: 'Sarabun', 'Thonburi', 'Tahoma', sans-serif;
    font-weight: 700;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    cursor: pointer;
    transition: all 0.2s ease;
}
.name-text {
    font-family: 'Sarabun', 'Thonburi', 'Tahoma', sans-serif;
}
.sched-emp-badge:hover {
    transform: scale(1.05);
    opacity: 0.8;
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
}
.modal-content {
    background: white;
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 600px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}
.modal-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--secondary);
}
.modal-header h3 { font-size: 1.25rem; font-weight: 700; }
.close-modal-btn {
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--text-muted);
}
.close-modal-btn:hover { color: var(--danger); }
.modal-body { padding: 1.5rem; }
.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}

/* Employee List Panel */
.list-panel-wrapper { padding: 1.5rem; }
.employee-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}
.emp-list-item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 0.75rem 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: transform 0.2s, box-shadow 0.2s;
}
.emp-list-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-light);
}
.panel-actions { text-align: right; }

/* Custom Dropdown */
.custom-dropdown {
    position: absolute;
    background: white;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    max-height: 500px;
    overflow-y: auto;
}
.custom-dropdown-item {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
    cursor: pointer;
    transition: background 0.1s;
}
.custom-dropdown-item:hover { background: var(--bg-main); color: var(--primary); font-weight: 500; }

/* Loading & Toast */
.loading-overlay {
    position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(255,255,255,0.8);
    backdrop-filter: blur(4px);
    display: flex; align-items: center; justify-content: center;
    z-index: 9999;
}
.loading-content { text-align: center; color: var(--primary); }
.spin { animation: spin 1s linear infinite; }
@keyframes spin { 100% { transform: rotate(360deg); } }

.toast-container {
    position: fixed; bottom: 1.5rem; right: 1.5rem;
    display: flex; flex-direction: column; gap: 0.5rem;
    z-index: 10000;
}
.toast {
    background: white;
    border-left: 4px solid var(--success);
    padding: 1rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    animation: slideIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.toast.error { border-left-color: var(--danger); }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* Animations */
.animate-fade-in { animation: fadeIn 0.3s ease; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.animate-pop-in { animation: popIn 0.3s cubic-bezier(0.16, 1, 0.3, 1); }
@keyframes popIn { from { transform: scale(0.95); opacity: 0; } to { transform: scale(1); opacity: 1; } }

/* Availability Grid */
.availability-grid {
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-top: 0.5rem;
}
.avail-row {
    display: flex;
    align-items: center;
    padding: 0.5rem;
    border-bottom: 1px solid var(--border);
    gap: 1rem;
}
.avail-row:last-child { border-bottom: none; }
.avail-row.alt { background: #fafafa; }
.avail-day { width: 60px; font-weight: 600; display: flex; align-items: center; gap: 0.25rem; }
.avail-shifts { display: flex; flex-wrap: wrap; gap: 0.75rem; flex: 1; }

/* Shift colors for rows */
.shift-row-0 { background-color: #f8fafc; } /* Pastel grey-white for 11:30 */
.shift-row-1 { background-color: #fefad5; } /* Custom Yellow */
.shift-row-2 { background-color: #defbed; } /* Custom Green */
.shift-row-3 { background-color: #ffeaec; } /* Custom Red/Rose */

/* ===================== Leave Management UI ===================== */
/* Weekly Calendar (Admin) */
.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    height: 100%;
}
@media (min-width: 1024px) {
    .dashboard-grid { grid-template-columns: 3fr 2fr; }
}
.schedule-panel, .list-panel {
    padding: 1.5rem;
    overflow-y: auto;
}
.calendar-week {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}
.calendar-day {
    background: white;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1rem;
    display: flex;
    gap: 1.5rem;
}
.calendar-day.today {
    border-left: 4px solid var(--primary);
    background: #f8fafc;
}
.date-header {
    width: 60px;
    text-align: center;
    border-right: 1px solid var(--border);
    padding-right: 1rem;
}
.date-header .day-name { display: block; font-size: 0.75rem; color: var(--text-muted); text-transform: uppercase; }
.date-header .date-num { display: block; font-size: 1.5rem; font-weight: 700; color: var(--text-main); }
.day-leaves { flex: 1; display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; }
.leave-item {
    background: var(--danger-light);
    color: var(--danger);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}
.leave-item i { width: 14px; height: 14px; }
.empty-leave { color: var(--text-muted); font-style: italic; font-size: 0.85rem; }

/* Monthly Calendar */
.full-width-panel { padding: 1.5rem; height: 100%; overflow-y: auto; }
.monthly-calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 0.5rem;
    min-width: 700px;
}
.month-day-header {
    text-align: center;
    font-weight: 600;
    color: var(--text-muted);
    padding: 0.5rem;
}
.month-day {
    background: white;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    min-height: 100px;
    padding: 0.5rem;
    display: flex;
    flex-direction: column;
}
.month-day.empty { background: transparent; border: none; }
.month-day.today { background: var(--primary-light); border-color: var(--primary); color: var(--primary-dark); }
.month-day.today .date-num { font-weight: 700; }
.month-day.has-leave { border-color: var(--danger-light); background: #fffcfc; }
.date-num { font-size: 0.9rem; margin-bottom: 0.5rem; color: var(--text-main); }
.leave-badge {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Summary Grid */
.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}
.summary-card {
    background: white;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: transform 0.2s, box-shadow 0.2s;
}
.summary-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.summary-avatar {
    width: 48px; height: 48px;
    border-radius: var(--radius-full);
    background: var(--primary-light);
    color: var(--primary-dark);
    display: flex; align-items: center; justify-content: center;
}
.summary-info h3 { font-size: 1.1rem; color: var(--text-main); margin-bottom: 0.25rem; }
.summary-stat { font-size: 0.9rem; color: var(--text-muted); }
.summary-stat strong { color: var(--danger); font-size: 1.1rem; }

/* Table overrides for Admin View */
.data-table { border-collapse: collapse; width: 100%; }
.data-table th, .data-table td { padding: 0.75rem 1rem; border-bottom: 1px solid var(--border); }
.data-table th { background: var(--bg-main); font-weight: 600; color: var(--text-muted); font-size: 0.85rem; text-transform: uppercase; }
.data-table tr:hover { background: #fafafa; }