/* 
 * Modern & Lightweight Styling for Digital Guestbook
 * Built with Vanilla CSS Variables for Super Fast Load Speeds
 */

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

:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #eff6ff;
    --success: #10b981;
    --success-light: #ecfdf5;
    --danger: #ef4444;
    --warning: #f59e0b;
    --dark: #0f172a;
    --gray-900: #1e293b;
    --gray-700: #334155;
    --gray-500: #64748b;
    --gray-300: #cbd5e1;
    --gray-100: #f8fafc;
    --white: #ffffff;
    --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 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: #f1f5f9;
    color: var(--gray-900);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    line-height: 1.5;
}

/* Background Decoration for Index */
.hero-bg {
    background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 280px;
    z-index: 1;
}

/* Layout Containers */
.main-wrapper {
    position: relative;
    z-index: 10;
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 30px 20px;
    flex: 1;
}

/* Header Component */
.header-box {
    text-align: center;
    color: var(--white);
    margin-bottom: 30px;
}

.header-box h1 {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}

.header-box p {
    font-size: 1.05rem;
    opacity: 0.9;
    font-weight: 300;
}

.header-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(255, 255, 255, 0.18);
    backdrop-filter: blur(8px);
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 0.85rem;
    margin-bottom: 12px;
    border: 1px solid rgba(255, 255, 255, 0.25);
}

/* Card Component */
.card {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--gray-100);
    overflow: hidden;
    margin-bottom: 24px;
}

.card-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--gray-100);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--white);
}

.card-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--dark);
    display: flex;
    align-items: center;
    gap: 10px;
}

.card-body {
    padding: 24px;
}

/* Form Styles */
.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

@media (max-width: 768px) {
    .form-grid {
        grid-template-columns: 1fr;
    }
    .header-box {
        flex-direction: column !important;
        text-align: center !important;
        gap: 12px !important;
    }
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--gray-700);
}

label span.req {
    color: var(--danger);
}

input[type="text"],
input[type="password"],
input[type="number"],
input[type="tel"],
input[type="datetime-local"],
input[type="date"],
input[type="month"],
select,
textarea {
    width: 100%;
    height: 44px;
    padding: 10px 14px;
    font-family: inherit;
    font-size: 0.925rem;
    border: 1.5px solid var(--gray-300);
    border-radius: var(--radius-md);
    background-color: var(--white);
    color: var(--dark);
    transition: var(--transition);
    outline: none;
}

input:focus, select:focus, textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px var(--primary-light);
}

textarea {
    height: auto;
    resize: vertical;
    min-height: 85px;
}

.help-text {
    font-size: 0.78rem;
    color: var(--gray-500);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn-primary {
    background-color: var(--primary);
    color: var(--white);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(37, 99, 235, 0.35);
}

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

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

.btn-outline {
    background-color: transparent;
    border: 1.5px solid var(--gray-300);
    color: var(--gray-700);
}

.btn-outline:hover {
    background-color: var(--gray-100);
    border-color: var(--gray-500);
}

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

.btn-sm {
    padding: 6px 12px;
    font-size: 0.825rem;
}

/* Alert Boxes */
.alert {
    padding: 14px 18px;
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    font-size: 0.925rem;
    display: flex;
    align-items: center;
    gap: 12px;
}

.alert-success {
    background-color: var(--success-light);
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.alert-danger {
    background-color: #fef2f2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

/* Data Table Component */
.table-responsive {
    width: 100%;
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.9rem;
}

.table th {
    background-color: var(--gray-100);
    padding: 12px 16px;
    font-weight: 600;
    color: var(--gray-700);
    border-bottom: 2px solid var(--gray-300);
    white-space: nowrap;
}

.table td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--gray-100);
    vertical-align: middle;
}

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

/* Badges */
.badge {
    display: inline-block;
    padding: 3px 8px;
    border-radius: 6px;
    font-size: 0.78rem;
    font-weight: 600;
}

.badge-info {
    background-color: #e0f2fe;
    color: #0369a1;
}

.badge-success {
    background-color: var(--success-light);
    color: #047857;
}

.badge-warning {
    background-color: #fef3c7;
    color: #b45309;
}

/* Filter Box */
.filter-box {
    background-color: var(--gray-100);
    padding: 18px;
    border-radius: var(--radius-md);
    margin-bottom: 20px;
}

.filter-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    align-items: end;
}

@media (max-width: 992px) {
    .filter-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .filter-grid {
        grid-template-columns: 1fr;
    }
    .filter-grid .form-group[style*="span 2"] {
        grid-column: span 1 !important;
    }
}

/* Stats Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--white);
    padding: 18px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-100);
    display: flex;
    align-items: center;
    gap: 16px;
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
}

.stat-info h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--dark);
}

.stat-info p {
    font-size: 0.825rem;
    color: var(--gray-500);
}

/* Admin Nav */
.admin-navbar {
    background: var(--dark);
    color: var(--white);
    padding: 14px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.admin-navbar .brand {
    font-size: 1.15rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Footer */
footer {
    text-align: center;
    padding: 20px;
    font-size: 0.85rem;
    color: var(--gray-500);
    margin-top: auto;
}