:root {
    --bg: #f5f7fb;
    --surface: #ffffff;
    --surface-alt: #f0f4f8;
    --text: #1f2a37;
    --muted: #6b7280;
    --primary: #1f4d5a;
    --primary-hover: #163a44;
    --accent: #d6e4ea;
    --border: #dbe3ea;
    --success: #2e7d5a;
    --danger: #b94a48;
    --shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
    --radius: 14px;
    --radius-sm: 10px;
    --max-width: 1200px;
    --transition: 0.2s ease;
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    font-family: "Segoe UI", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
}

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

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

.container {
    width: 90%;
    max-width: var(--max-width);
    margin: 0 auto;
}

.topbar {
    background: var(--surface);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 10;
}

.topbar-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 0;
}

.logo {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--primary);
}

.nav {
    display: flex;
    gap: 18px;
    flex-wrap: wrap;
}

.nav a {
    padding: 10px 14px;
    border-radius: 10px;
    color: var(--text);
    font-weight: 500;
}

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

.page {
    padding: 32px 0 56px;
}

.hero {
    background: linear-gradient(135deg, #1f4d5a, #2d6b7d);
    color: #fff;
    padding: 48px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 28px;
}

.hero h1 {
    margin-top: 0;
    font-size: 2rem;
}

.hero p {
    margin-bottom: 0;
    color: rgba(255,255,255,0.9);
}

.grid {
    display: grid;
    gap: 22px;
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.card {
    background: var(--surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 24px;
    border: 1px solid var(--border);
}

.card h2,
.card h3 {
    margin-top: 0;
}

.muted {
    color: var(--muted);
}

.btn {
    display: inline-block;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 10px;
    padding: 12px 18px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

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

.btn-secondary {
    background: var(--surface-alt);
    color: var(--text);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: #e5edf2;
    color: var(--text);
}

form {
    display: grid;
    gap: 16px;
}

label {
    font-weight: 600;
    margin-bottom: 6px;
    display: block;
}

input,
select,
textarea {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: #fff;
    font-size: 1rem;
}

textarea {
    min-height: 120px;
    resize: vertical;
}

.table-wrap {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--surface);
    border-radius: var(--radius);
    overflow: hidden;
}

th, td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--border);
    text-align: left;
}

th {
    background: var(--surface-alt);
    font-size: 0.95rem;
}

.badge {
    display: inline-block;
    padding: 6px 10px;
    border-radius: 999px;
    background: var(--accent);
    color: var(--primary);
    font-size: 0.85rem;
    font-weight: 600;
}

.list {
    display: grid;
    gap: 14px;
}

.list-item {
    padding: 16px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--surface);
}

.searchbar {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.searchbar input {
    flex: 1;
    min-width: 220px;
}

.footer {
    padding: 28px 0 40px;
    color: var(--muted);
    text-align: center;
}

.login-wrapper {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px;
}

.login-card {
    width: 100%;
    max-width: 430px;
    background: var(--surface);
    border-radius: 18px;
    box-shadow: var(--shadow);
    padding: 32px;
    border: 1px solid var(--border);
}

.login-card h1 {
    margin-top: 0;
    color: var(--primary);
}

.alert {
    padding: 12px 14px;
    border-radius: 10px;
    margin-bottom: 16px;
    font-weight: 500;
}

.alert-success {
    background: #e7f6ee;
    color: var(--success);
}

.alert-danger {
    background: #fdeceb;
    color: var(--danger);
}

.meta {
    font-size: 0.92rem;
    color: var(--muted);
}

.flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

@media (max-width: 768px) {
    .hero {
        padding: 28px;
    }

    .topbar-inner {
        flex-direction: column;
        align-items: flex-start;
        gap: 14px;
    }

    .nav {
        width: 100%;
    }
}