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

:root {
    --bg-color: #F3F6F9; /* Softer background, easy on the eyes */
    --surface-color: #ffffff;
    --text-primary: #2D3748; /* Softer than pure black */
    --text-secondary: #718096;
    --primary-color: #3182CE; /* Calming, trustworthy blue */
    --primary-hover: #2B6CB0;
    --accent-color: #805AD5; /* Soft purple accent */
    --danger-color: #E53E3E;
    --success-color: #38A169;
    --warning-color: #DD6B20;
    --border-color: #E2E8F0;
    --sidebar-width: 270px;
    --sidebar-collapsed: 80px;
    --glass-bg: rgba(255, 255, 255, 0.85);
    --glass-border: rgba(255, 255, 255, 0.6);
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.05), 0 1px 2px rgba(0,0,0,0.03);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.025);
    --shadow-premium: 0 20px 25px -5px rgba(0, 0, 0, 0.05), 0 10px 10px -5px rgba(0, 0, 0, 0.02);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Glassmorphism Classes */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
}

.glass-card {
    background: var(--surface-color);
    border: 1px solid var(--glass-border);
    border-radius: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

.glass-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

/* Typography & Layouts */
h1, h2, h3, h4 { font-weight: 700; letter-spacing: -0.02em; }
p { line-height: 1.6; }

.hidden { display: none !important; }
.flex { display: flex; }
.flex-col { display: flex; flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.grid { display: grid; }
.gap-2 { gap: 0.5rem; }
.gap-4 { gap: 1rem; }
.gap-6 { gap: 1.5rem; }

/* Animations */
.fade-in { animation: fadeIn 0.4s cubic-bezier(0.4, 0, 0.2, 1) forwards; }
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(15px); }
    to { opacity: 1; transform: translateY(0); }
}

.spin { animation: spin 1s linear infinite; }
@keyframes spin { 100% { transform: rotate(360deg); } }

/* Login Page specific */
#loginPage {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #f8fafc 0%, #e0e7ff 100%);
    padding: 1rem;
}

.login-form-container {
    width: 100%;
    max-width: 420px;
    padding: 2.5rem;
    border-radius: 2rem;
    box-shadow: var(--shadow-premium);
}

.icon-wrapper {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    border-radius: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    box-shadow: 0 10px 15px -3px rgba(49, 130, 206, 0.25);
    color: white;
}

.input-group {
    margin-bottom: 1.25rem;
}

.input-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.premium-input {
    width: 100%;
    padding: 0.875rem 1.25rem;
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    font-size: 0.95rem;
    font-family: inherit;
    background: var(--surface-color);
    transition: all 0.3s ease;
    outline: none;
    color: var(--text-primary);
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.02);
}

.premium-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(49, 130, 206, 0.15);
}

.btn-primary {
    width: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    color: white;
    border: none;
    padding: 0.875rem 1.5rem;
    border-radius: 1rem;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    box-shadow: 0 4px 6px -1px rgba(49, 130, 206, 0.2);
    transition: all 0.3s ease;
    letter-spacing: 0.025em;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 15px -3px rgba(49, 130, 206, 0.3);
}

.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; transform: none; box-shadow: none; }

.btn-secondary {
    background: var(--surface-color);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 0.75rem 1.5rem;
    border-radius: 0.875rem;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover { background: var(--bg-color); box-shadow: var(--shadow-md); transform: translateY(-1px); }

/* Main Layout */
#mainLayout {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

.sidebar {
    width: var(--sidebar-width);
    background: var(--surface-color);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1), margin-left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 40;
}

.sidebar-header {
    height: 70px;
    display: flex;
    align-items: center;
    padding: 0 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-logo-text { font-size: 1.25rem; font-weight: 800; letter-spacing: -0.025em; color: var(--text-primary); margin-left: 0.75rem; }

.nav-menu { flex-grow: 1; padding: 1.5rem 1rem; overflow-y: auto; display: flex; flex-direction: column; gap: 0.5rem; }

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1rem;
    border-radius: 1rem;
    color: var(--text-secondary);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    background: transparent;
    text-align: left;
}

.nav-item:hover, .nav-item.active {
    background: var(--bg-color);
    color: var(--primary-color);
}

.nav-item.active {
    background: var(--surface-color);
    color: var(--primary-color);
    font-weight: 600;
    box-shadow: var(--shadow-sm);
}

.sidebar-footer { padding: 1.5rem 1rem; border-top: 1px solid var(--border-color); }

.user-snippet { padding: 0 1rem; margin-bottom: 1rem; }
.user-snippet .name { font-weight: 700; color: var(--text-primary); margin-bottom: 0.25rem; }
.user-snippet .role { font-size: 0.75rem; font-weight: 800; letter-spacing: 0.05em; color: var(--accent-color); text-transform: uppercase;}

.nav-item.danger { color: var(--danger-color); }
.nav-item.danger:hover { background: rgba(239, 68, 68, 0.08); }

.main-content {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    overflow: auto;
}

.topbar {
    height: 70px;
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    position: sticky;
    top: 0;
    z-index: 30;
}

.page-container {
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

/* Dashboard Cards */
.hero-card {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    padding: 2.5rem;
    border-radius: 1.5rem;
    margin-bottom: 2rem;
    position: relative;
    overflow: hidden;
    box-shadow: 0 10px 15px -3px rgba(79, 70, 229, 0.2);
}

.hero-card::after {
    content: '';
    position: absolute;
    top: -50%; right: -10%;
    width: 300px; height: 300px;
    background: radial-gradient(circle, rgba(255,255,255,0.2) 0%, rgba(255,255,255,0) 70%);
    border-radius: 50%;
}

/* Tables */
.table-container {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 1.5rem;
    overflow-x: auto;
    overflow-y: hidden;
    box-shadow: var(--shadow-sm);
}

table { width: 100%; border-collapse: collapse; }
th {
    text-align: left;
    padding: 1.25rem 1.5rem;
    background: #F8FAFC;
    color: var(--text-secondary);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--border-color);
}
td {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid #F1F5F9;
    color: var(--text-primary);
    font-size: 0.9rem;
}
tr:last-child td { border-bottom: none; }
tr:hover td { background: #F8FAFC; }

.badge {
    display: inline-flex;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
}
.badge.pending { background: #fef3c7; color: #b45309; }
.badge.approved { background: #d1fae5; color: #047857; }
.badge.admin { background: #e0e7ff; color: #4338ca; }
.badge.guru { background: #f1f5f9; color: #475569; }

.action-btn {
    background: none; border: none; cursor: pointer;
    color: var(--primary-color);
    padding: 0.5rem; border-radius: 0.5rem;
    transition: all 0.2s;
}
.action-btn:hover { background: rgba(79, 70, 229, 0.1); }

#sidebarToggleBtn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    color: var(--text-primary);
    background: var(--bg-color);
    border-radius: 10px;
}

#sidebarToggleBtn:hover {
    background: var(--border-color);
    color: var(--primary-color);
}

/* Modals */
.modal-overlay {
    position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(15, 23, 42, 0.4);
    backdrop-filter: blur(4px);
    z-index: 100;
    display: flex; align-items: center; justify-content: center;
    padding: 1rem;
}

.modal-content {
    background: var(--surface-color);
    border-radius: 2rem;
    width: 100%;
    max-width: 90vw; /* Reduced from 98vw for better looks on desktop if we want, but user requested 98vw for weekly */
    height: 90vh;
    display: flex; flex-direction: column;
    box-shadow: var(--shadow-premium);
    overflow: hidden;
}

.modal-header {
    padding: 1.5rem 2rem; border-bottom: 1px solid var(--border-color);
    display: flex; align-items: center; justify-content: space-between;
}

.modal-body {
    flex-grow: 1; padding: 1.5rem 2rem; overflow-y: auto; background: var(--bg-color);
}

.modal-footer {
    padding: 1.5rem 2rem; border-top: 1px solid var(--border-color);
    display: flex; justify-content: flex-end; gap: 1rem; background: var(--surface-color);
}

/* Weekly Grid specifics */
.weekly-grid-container {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 1rem;
    min-width: 1100px;
}

.day-column {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 1.25rem;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    display: flex; flex-direction: column;
}

.day-header {
    background: var(--primary-color); color: white;
    padding: 1rem; text-align: center;
}
.day-header h4 { margin-bottom: 0.25rem; }
.day-header p { font-size: 0.75rem; opacity: 0.8; font-weight: 700; letter-spacing: 0.05em; }

.slot-item {
    padding: 1rem; border-bottom: 1px solid var(--border-color); background: var(--surface-color);
}
.slot-item:last-child { border-bottom: none; }

.slot-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 0.5rem; }
.slot-header .jam { font-size: 0.65rem; font-weight: 800; color: var(--primary-color); }
.slot-header .waktu { font-size: 0.65rem; color: var(--text-secondary); }

.slot-input {
    width: 100%; border: 1px solid var(--border-color); border-radius: 0.5rem;
    padding: 0.5rem; font-size: 0.75rem; margin-bottom: 0.5rem; outline: none; transition: all 0.2s;
    font-family: inherit;
}
.slot-input:focus { border-color: var(--primary-color); }

.slot-break {
    background: var(--bg-color); padding: 0.75rem; text-align: center; font-size: 0.65rem;
    font-weight: 800; color: var(--text-secondary); letter-spacing: 0.1em;
}

/* Checkbox Style */
.checkbox-list { margin-bottom: 1rem; display: flex; align-items: center; gap: 0.75rem; }
.checkbox-list input[type="checkbox"] { width: 1.2rem; height: 1.2rem; cursor: pointer; accent-color: var(--primary-color);}

/* Toast */
.toast {
    position: fixed; bottom: 2rem; left: 50%; transform: translateX(-50%) translateY(100px);
    background: var(--text-primary); color: white; padding: 1rem 2rem;
    border-radius: 9999px; font-weight: 600; box-shadow: var(--shadow-lg);
    opacity: 0; transition: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    z-index: 200; pointer-events: none;
}

.toast.show { transform: translateX(-50%) translateY(0); opacity: 1; }

/* Small Modal */
.small-modal-content { max-width: 500px; height: auto; }

/* --- SIMPLE DATATABLES OVERRIDES --- */
.datatable-wrapper {
    font-family: inherit;
}
.datatable-top, .datatable-bottom {
    padding: 1rem 1.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}
.datatable-input {
    border: 1px solid var(--border-color);
    padding: 0.625rem 1.25rem;
    border-radius: 9999px;
    outline: none;
    transition: all 0.2s ease;
    background: var(--bg-color);
    font-family: inherit;
    font-size: 0.875rem;
    min-width: 240px;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.02);
}
.datatable-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(49, 130, 206, 0.15);
}
.datatable-selector {
    border: 1px solid var(--border-color);
    padding: 0.4rem 1rem;
    border-radius: 9999px;
    font-weight: 500;
    outline: none;
    background: var(--bg-color);
    font-family: inherit;
    color: var(--text-primary);
    cursor: pointer;
}
.datatable-table > tbody > tr > td {
    padding: 1.25rem 1.5rem !important;
    border-bottom: 1px solid #f1f5f9;
}
.datatable-table > thead > tr > th {
    background: #f8fafc !important;
    border-bottom: 2px solid var(--border-color) !important;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    padding: 1.25rem 1.5rem !important;
}
.datatable-table > tbody > tr {
    transition: all 0.2s ease;
}
.datatable-table > tbody > tr:hover > td {
    background: rgba(79, 70, 229, 0.03) !important;
}
.datatable-pagination-list li a {
    color: var(--text-secondary);
    border-radius: 9999px;
    margin: 0 0.15rem;
    padding: 0.5rem 1rem;
    font-weight: 600;
    transition: all 0.2s;
}
.datatable-pagination-list li a:hover {
    background-color: var(--border-color);
    color: var(--text-primary);
}
.datatable-pagination-list .active a, .datatable-pagination-list .active a:hover {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover)) !important;
    color: white !important;
    box-shadow: 0 4px 6px -1px rgba(49, 130, 206, 0.2);
}

/* =========================================
   RESPONSIVE DESIGN & SIDEBAR TOGGLE
   ========================================= */

.sidebar {
    position: relative;
    z-index: 50;
    flex-shrink: 0;
}

/* Desktop Styles (> 1024px) */
@media (min-width: 1025px) {
    body.sidebar-toggled .sidebar {
        margin-left: calc(-1 * var(--sidebar-width));
    }
    .sidebar-overlay {
        display: none !important;
    }
}

/* Tablet & Mobile Styles (<= 1024px) */
@media (max-width: 1024px) {
    .sidebar {
        position: fixed;
        left: calc(-1 * var(--sidebar-width));
        height: 100vh;
        box-shadow: var(--shadow-premium);
        transition: left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    
    body.sidebar-toggled .sidebar {
        left: 0;
    }

    .sidebar-overlay {
        position: fixed;
        inset: 0;
        background: rgba(15, 23, 42, 0.4);
        backdrop-filter: blur(2px);
        z-index: 40;
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
    }
    
    body.sidebar-toggled .sidebar-overlay {
        opacity: 1;
        visibility: visible;
    }

    .page-container {
        padding: 1.5rem;
    }
    
    .hero-card {
        padding: 1.5rem;
    }
}

/* Mobile Tweaks (<= 768px) */
@media (max-width: 768px) {
    .page-container {
        padding: 1rem;
    }
    
    .glass-card {
        padding: 1rem !important;
    }

    .weekly-grid-container {
        grid-template-columns: 1fr;
        min-width: 100%;
    }
    
    .table-container {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    .modal-content {
        max-width: 95vw;
        height: 95vh;
        border-radius: 1rem;
    }

    .modal-header, .modal-body, .modal-footer {
        padding: 1rem;
    }
    
    .topbar {
        padding: 0 1rem;
    }
    
    .datatable-top, .datatable-bottom {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }
}