/* =====================================================
   SISTEM JADWAL PELAJARAN SEKOLAH - STYLESHEET
   ===================================================== */

/* ===== RESET & VARIABLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --secondary: #64748b;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #0ea5e9;
    --light: #f8fafc;
    --lighter: #f1f5f9;
    --dark: #1e293b;
    --darker: #0f172a;
    --border: #e2e8f0;
    --text: #334155;
    --text-light: #64748b;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --radius: 8px;
    --radius-lg: 12px;
}

/* ===== TYPOGRAPHY ===== */
html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--light);
    color: var(--text);
    line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 0.5rem;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }
h5 { font-size: 1rem; }
h6 { font-size: 0.875rem; }

p {
    margin-bottom: 1rem;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--primary-dark);
}

/* ===== LAYOUT ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.container-fluid {
    width: 100%;
    padding: 0 1rem;
}

.row {
    display: flex;
    flex-wrap: wrap;
    margin: -0.5rem;
}

.col {
    flex: 1;
    padding: 0.5rem;
    min-width: 250px;
}

.col-12 { flex: 0 0 100%; }
.col-6 { flex: 0 0 50%; }
.col-4 { flex: 0 0 33.333%; }
.col-3 { flex: 0 0 25%; }

@media (max-width: 768px) {
    .col { min-width: 100%; }
    .col-6, .col-4, .col-3 { flex: 0 0 100%; }
}

/* ===== NAVBAR ===== */
.navbar {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 1rem 0;
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
}

.navbar-menu {
    display: flex;
    gap: 2rem;
    align-items: center;
    list-style: none;
}

.navbar-menu a {
    color: white;
    font-weight: 500;
    transition: opacity 0.3s ease;
}

.navbar-menu a:hover {
    opacity: 0.8;
}

.navbar-user {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.navbar-user-name {
    color: white;
    font-weight: 500;
}

/* ===== SIDEBAR ===== */
.sidebar {
    background: white;
    border-right: 1px solid var(--border);
    padding: 2rem 0;
    min-height: calc(100vh - 70px);
}

.sidebar-menu {
    list-style: none;
}

.sidebar-menu-item {
    margin: 0;
}

.sidebar-menu-link {
    display: block;
    padding: 0.75rem 1.5rem;
    color: var(--text);
    font-weight: 500;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
}

.sidebar-menu-link:hover,
.sidebar-menu-link.active {
    background-color: var(--lighter);
    border-left-color: var(--primary);
    color: var(--primary);
}

/* ===== MAIN CONTENT ===== */
.main-content {
    padding: 2rem 1rem;
}

.page-header {
    margin-bottom: 2rem;
}

.page-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 0.5rem;
}

.page-subtitle {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* ===== CARDS ===== */
.card {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: box-shadow 0.3s ease;
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
    background-color: var(--lighter);
}

.card-body {
    padding: 1.5rem;
}

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

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 0;
}

/* ===== FORMS ===== */
.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--dark);
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="date"],
input[type="time"],
select,
textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
input[type="number"]:focus,
input[type="date"]:focus,
input[type="time"]:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

textarea {
    resize: vertical;
    min-height: 100px;
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    text-align: center;
    white-space: nowrap;
}

.btn-primary {
    background-color: var(--primary);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: var(--secondary);
    color: white;
}

.btn-secondary:hover {
    background-color: #475569;
}

.btn-success {
    background-color: var(--success);
    color: white;
}

.btn-success:hover {
    background-color: #059669;
}

.btn-danger {
    background-color: var(--danger);
    color: white;
}

.btn-danger:hover {
    background-color: #dc2626;
}

.btn-warning {
    background-color: var(--warning);
    color: white;
}

.btn-warning:hover {
    background-color: #d97706;
}

.btn-info {
    background-color: var(--info);
    color: white;
}

.btn-info:hover {
    background-color: #0284c7;
}

.btn-outline {
    background-color: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}

.btn-outline:hover {
    background-color: var(--primary);
    color: white;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-block {
    display: block;
    width: 100%;
}

/* ===== TABLES ===== */
.table {
    width: 100%;
    border-collapse: collapse;
    background: white;
}

.table thead {
    background-color: var(--lighter);
    border-bottom: 2px solid var(--border);
}

.table th {
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--dark);
}

.table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border);
}

.table tbody tr:hover {
    background-color: var(--lighter);
}

.table-striped tbody tr:nth-child(odd) {
    background-color: var(--lighter);
}

.table-sm th,
.table-sm td {
    padding: 0.75rem;
}

/* ===== ALERTS ===== */
.alert {
    padding: 1rem 1.5rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
    border-left: 4px solid;
}

.alert-success {
    background-color: #ecfdf5;
    border-left-color: var(--success);
    color: #065f46;
}

.alert-danger {
    background-color: #fef2f2;
    border-left-color: var(--danger);
    color: #7f1d1d;
}

.alert-warning {
    background-color: #fffbeb;
    border-left-color: var(--warning);
    color: #78350f;
}

.alert-info {
    background-color: #f0f9ff;
    border-left-color: var(--info);
    color: #0c2d6b;
}

/* ===== BADGES ===== */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 600;
}

.badge-success {
    background-color: #d1fae5;
    color: #065f46;
}

.badge-danger {
    background-color: #fee2e2;
    color: #7f1d1d;
}

.badge-warning {
    background-color: #fef3c7;
    color: #78350f;
}

.badge-info {
    background-color: #cffafe;
    color: #0c2d6b;
}

/* ===== SCHEDULE TABLE ===== */
.schedule-table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    box-shadow: var(--shadow-md);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.schedule-table thead {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
}

.schedule-table th {
    padding: 1rem;
    text-align: center;
    font-weight: 600;
    border-right: 1px solid rgba(255, 255, 255, 0.2);
}

.schedule-table th:last-child {
    border-right: none;
}

.schedule-table td {
    padding: 1rem;
    text-align: center;
    border-right: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.schedule-table td:last-child {
    border-right: none;
}

.schedule-table tbody tr:hover {
    background-color: var(--lighter);
}

.schedule-cell {
    min-height: 60px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.schedule-cell-empty {
    color: var(--text-light);
    font-style: italic;
}

.schedule-cell-teacher {
    font-weight: 600;
    color: var(--primary);
}

.schedule-cell-subject {
    font-size: 0.875rem;
    color: var(--text-light);
}

.schedule-time {
    font-weight: 600;
    color: var(--dark);
    min-width: 100px;
}

/* ===== UTILITIES ===== */
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.p-1 { padding: 0.5rem; }
.p-2 { padding: 1rem; }
.p-3 { padding: 1.5rem; }
.p-4 { padding: 2rem; }

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }

.text-muted { color: var(--text-light); }
.text-dark { color: var(--dark); }
.text-primary { color: var(--primary); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }

.d-flex { display: flex; }
.d-grid { display: grid; }
.d-none { display: none; }

.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.gap-3 { gap: 1.5rem; }

.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.align-center { align-items: center; }

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .navbar-menu {
        gap: 1rem;
    }
    
    .page-title {
        font-size: 1.5rem;
    }
    
    .schedule-table {
        font-size: 0.875rem;
    }
    
    .schedule-table th,
    .schedule-table td {
        padding: 0.75rem 0.5rem;
    }
    
    .schedule-cell {
        min-height: 50px;
    }
}

@media (max-width: 480px) {
    .navbar-menu {
        gap: 0.5rem;
    }
    
    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }
    
    .schedule-table {
        font-size: 0.75rem;
    }
    
    .schedule-table th,
    .schedule-table td {
        padding: 0.5rem 0.25rem;
    }
}

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

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

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.spinner {
    animation: spin 1s linear infinite;
}

/* ===== LOADING ===== */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* ===== MODAL ===== */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background-color: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    max-width: 500px;
    width: 90%;
    animation: fadeIn 0.3s ease-in-out;
}

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

.modal-body {
    padding: 1.5rem;
}

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

.close-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-light);
}

.close-btn:hover {
    color: var(--dark);
}