/*
 * Admin Panel Stylesheet
 * School CMS
 */

:root {
    --admin-bg: #0f172a;
    --admin-sidebar: #1e293b;
    --admin-topbar: #1e293b;
    --admin-accent: #3b82f6;
    --admin-accent-hover: #2563eb;
    --admin-text: #e2e8f0;
    --admin-text-muted: #94a3b8;
    --admin-border: #334155;
    --admin-card: #ffffff;
    --admin-content-bg: #f1f5f9;
}

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

body {
    font-family: 'Noto Sans Thai', 'Segoe UI', sans-serif;
    background: var(--admin-content-bg);
    color: #334155;
    min-height: 100vh;
}

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

/* Sidebar */
.admin-sidebar {
    width: 260px;
    background: var(--admin-sidebar);
    color: var(--admin-text);
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    overflow-y: auto;
    z-index: 1000;
    transition: transform 0.3s ease;
}

.sidebar-brand {
    padding: 20px;
    font-size: 1.2rem;
    font-weight: 700;
    color: #fff;
    display: flex;
    align-items: center;
    gap: 10px;
    border-bottom: 1px solid var(--admin-border);
}

.sidebar-brand i {
    color: var(--admin-accent);
    font-size: 1.5rem;
}

.sidebar-nav {
    padding: 10px 0;
}

.sidebar-label {
    padding: 15px 20px 5px;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--admin-text-muted);
    font-weight: 600;
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 20px;
    color: var(--admin-text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: all 0.2s ease;
    border-left: 3px solid transparent;
}

.sidebar-link:hover {
    background: rgba(255,255,255,0.05);
    color: #fff;
    border-left-color: var(--admin-accent);
}

.sidebar-link.active {
    background: rgba(59, 130, 246, 0.1);
    color: var(--admin-accent);
    border-left-color: var(--admin-accent);
    font-weight: 500;
}

.sidebar-link i {
    width: 20px;
    text-align: center;
    font-size: 0.95rem;
}

/* Main Content */
.admin-main {
    flex: 1;
    margin-left: 260px;
    min-height: 100vh;
}

/* Top Bar */
.admin-topbar {
    background: var(--admin-topbar);
    color: var(--admin-text);
    padding: 0 20px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 999;
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

.sidebar-toggle {
    background: none;
    border: none;
    color: var(--admin-text);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 5px;
    display: none;
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: 10px;
}

.topbar-user {
    background: none;
    border: 1px solid var(--admin-border);
    color: var(--admin-text);
    padding: 5px 12px;
    border-radius: 6px;
    font-size: 0.88rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
}

/* Content */
.admin-content {
    padding: 25px;
}

/* Cards */
.admin-card {
    background: var(--admin-card);
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
    border: 1px solid #e2e8f0;
    overflow: hidden;
}

.admin-card-header {
    padding: 16px 20px;
    border-bottom: 1px solid #e2e8f0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #f8fafc;
}

.admin-card-header h5 {
    margin: 0;
    font-size: 1rem;
    font-weight: 600;
    color: #1e293b;
    display: flex;
    align-items: center;
    gap: 8px;
}

.admin-card-body {
    padding: 20px;
}

/* Stats */
.stat-card {
    background: var(--admin-card);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
    border: 1px solid #e2e8f0;
    display: flex;
    align-items: center;
    gap: 15px;
    transition: transform 0.2s;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.stat-icon {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    color: #fff;
}

.stat-icon.blue { background: linear-gradient(135deg, #3b82f6, #2563eb); }
.stat-icon.green { background: linear-gradient(135deg, #22c55e, #16a34a); }
.stat-icon.orange { background: linear-gradient(135deg, #f97316, #ea580c); }
.stat-icon.purple { background: linear-gradient(135deg, #8b5cf6, #7c3aed); }

.stat-info h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: #1e293b;
    margin: 0;
}

.stat-info p {
    font-size: 0.82rem;
    color: #64748b;
    margin: 0;
}

/* Table */
.admin-table {
    width: 100%;
    border-collapse: collapse;
}

.admin-table th {
    background: #f8fafc;
    padding: 12px 15px;
    font-size: 0.82rem;
    font-weight: 600;
    color: #64748b;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 2px solid #e2e8f0;
    text-align: left;
}

.admin-table td {
    padding: 12px 15px;
    border-bottom: 1px solid #f1f5f9;
    font-size: 0.9rem;
    vertical-align: middle;
}

.admin-table tr:hover td {
    background: #f8fafc;
}

.admin-table .thumb {
    width: 60px;
    height: 40px;
    object-fit: cover;
    border-radius: 6px;
}

/* Buttons */
.btn-admin {
    padding: 6px 14px;
    border-radius: 6px;
    font-size: 0.82rem;
    font-weight: 500;
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: all 0.2s;
}

.btn-edit { background: #dbeafe; color: #2563eb; }
.btn-edit:hover { background: #2563eb; color: #fff; }
.btn-delete { background: #fee2e2; color: #dc2626; }
.btn-delete:hover { background: #dc2626; color: #fff; }
.btn-add { background: var(--admin-accent); color: #fff; padding: 8px 18px; }
.btn-add:hover { background: var(--admin-accent-hover); color: #fff; }

/* Form */
.form-label {
    font-weight: 500;
    font-size: 0.9rem;
    color: #475569;
    margin-bottom: 5px;
}

.form-control, .form-select {
    border-radius: 8px;
    border: 1px solid #cbd5e1;
    padding: 8px 12px;
    font-size: 0.9rem;
}

.form-control:focus, .form-select:focus {
    border-color: var(--admin-accent);
    box-shadow: 0 0 0 3px rgba(59,130,246,0.1);
}

.img-preview {
    width: 120px;
    height: 80px;
    object-fit: cover;
    border-radius: 8px;
    border: 2px solid #e2e8f0;
    margin-top: 8px;
}

/* Page Header */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.page-header h4 {
    font-size: 1.3rem;
    font-weight: 700;
    color: #1e293b;
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 0;
}

/* Login Page */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0f172a, #1e293b);
}

.login-card {
    background: #fff;
    border-radius: 16px;
    padding: 40px;
    width: 100%;
    max-width: 420px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

.login-card h2 {
    text-align: center;
    margin-bottom: 5px;
    font-weight: 700;
    color: #1e293b;
}

.login-card p {
    text-align: center;
    color: #64748b;
    margin-bottom: 25px;
    font-size: 0.9rem;
}

.login-card .login-icon {
    text-align: center;
    font-size: 3rem;
    color: var(--admin-accent);
    margin-bottom: 15px;
}

/* Responsive */
@media (max-width: 991px) {
    .admin-sidebar {
        transform: translateX(-100%);
    }
    .admin-sidebar.active {
        transform: translateX(0);
    }
    .admin-main {
        margin-left: 0;
    }
    .sidebar-toggle {
        display: block;
    }
}

@media (max-width: 767px) {
    .admin-content { padding: 15px; }
    .page-header { flex-direction: column; gap: 10px; align-items: flex-start; }
}