:root {
    --primary-color: #0b5fb6;
    --primary-hover: #0a4f9a;
    --bg-color: #f8fafc;
    --text-color: #334155;
    --card-bg: #ffffff;
    --border-color: #e2e8f0;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--bg-color);
    color: var(--text-color);
}

/* Header Styling */
.admin-header {
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    height: 70px;
}

.main-nav {
    display: flex;
    gap: 30px;
    height: 100%;
}

.main-nav a {
    text-decoration: none;
    color: #64748b;
    font-weight: 500;
    font-size: 18px;
    display: flex;
    align-items: center;
    position: relative;
    height: 100%;
    transition: color 0.2s ease;
}

.main-nav a:hover {
    color: var(--primary-color);
}

.main-nav a.active {
    color: var(--primary-color);
    font-weight: 600;
}

.main-nav a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background-color: var(--primary-color);
    border-top-left-radius: 3px;
    border-top-right-radius: 3px;
}

.btn-outline {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    font-size: 16px;
    padding: 10px 20px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    transition: all 0.2s;
}

.btn-outline:hover {
    background-color: #f1f5f9;
}

/* Main Content */
.main-content {
    max-width: 1200px;
    margin: 40px auto;
    padding: 0 20px;
}

h1 {
    font-size: 36px;
    font-weight: 700;
    color: #0f172a;
    margin-bottom: 24px;
    margin-top: 0;
}

h1 span {
    font-weight: 400;
    color: #64748b;
}

.actions {
    margin-bottom: 24px;
}

.actions a {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
    padding: 10px 20px;
    border-radius: 6px;
    font-weight: 500;
    font-size: 14px;
    transition: background-color 0.2s;
    box-shadow: 0 4px 6px -1px rgba(11, 95, 182, 0.2);
}

.actions a:hover {
    background-color: var(--primary-hover);
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card-bg);
    border-radius: 8px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    overflow: hidden;
}

table th {
    background-color: #f8fafc;
    color: #475569;
    font-weight: 600;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

table td {
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
    font-size: 14px;
    vertical-align: middle;
}

table tr:last-child td {
    border-bottom: none;
}

table tr:hover {
    background-color: #f8fafc;
}

.icon-btn {
    text-decoration: none;
    color: #ef4444;
    font-size: 16px;
    transition: transform 0.2s;
    display: inline-block;
    cursor: pointer;
}

.icon-btn:hover {
    transform: scale(1.2);
}

/* Forms */
form {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    max-width: 800px;
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    margin-bottom: 20px;
}

.form-group label {
    font-weight: 600;
    font-size: 14px;
    margin-bottom: 8px;
    color: #475569;
}

.form-group input[type="text"],
.form-group textarea {
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 15px;
    font-family: inherit;
    transition: border-color 0.2s, box-shadow 0.2s;
    background-color: #f8fafc;
    width: 100%;
    box-sizing: border-box;
}

.form-group input[type="text"]:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(11, 95, 182, 0.1);
    background-color: #fff;
}

.form-group textarea {
    height: 120px;
    resize: vertical;
}

.form-group input[type="file"] {
    font-size: 14px;
    color: #64748b;
    padding: 8px 0;
}

.submit-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 6px;
    font-weight: 600;
    font-size: 16px;
    cursor: pointer;
    width: 100%;
    max-width: 400px;
    transition: background-color 0.2s;
    margin-top: 10px;
}

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

/* Footer */
.footer {
    text-align: center;
    margin: 60px 0 30px;
    color: #94a3b8;
    font-size: 13px;
}

.footer a {
    color: var(--primary-color);
    text-decoration: none;
}