:root {
    --dark-blue: #163f74;
    --blue: #2765a8;
    --light-blue: #c8ddff;
    --bg: #f4f7fc;
    --card: #ffffff;
    --text: #1d2939;
    --muted: #5e6f86;
    --accent: #fbbc04;
    --border: #dde3ed;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--bg);
    color: var(--text);
}

.page-wrapper {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 32px;
    background: #ffffff;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 10;
}

.navbar a {
    color: var(--dark-blue);
    text-decoration: none;
    font-weight: 600;
}

.nav-menu a {
    margin-left: 24px;
}

.landing-container {
    padding: 0 32px 48px;
}

.hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    align-items: center;
    margin-top: 32px;
}

.hero-content {
    max-width: 560px;
}

.badge {
    display: inline-block;
    background: var(--accent);
    color: #1d2939;
    font-weight: 700;
    padding: 10px 16px;
    border-radius: 999px;
    margin-bottom: 20px;
}

.hero h1 {
    margin: 0;
    font-size: clamp(2.5rem, 4vw, 3.6rem);
    line-height: 1.05;
}

.hero p {
    margin: 24px 0;
    color: var(--muted);
    font-size: 1.06rem;
    line-height: 1.8;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 13px 26px;
    border-radius: 999px;
    text-decoration: none;
    font-weight: 700;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: var(--dark-blue);
    color: #ffffff;
}

.hero-visual {
    display: grid;
    gap: 20px;
}

.hero-card {
    border: 1px solid var(--border);
    background: var(--card);
    border-radius: 20px;
    padding: 28px;
    box-shadow: 0 18px 50px rgba(15, 41, 71, 0.08);
}

.hero-card h2 {
    margin: 0 0 12px;
    font-size: 1rem;
    color: var(--muted);
}

.hero-card p {
    margin: 0;
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark-blue);
}

.features-section {
    margin-top: 56px;
}

.features-section h2 {
    margin-bottom: 24px;
    font-size: 1.9rem;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
}

.feature-card {
    border-radius: 20px;
    background: var(--card);
    padding: 24px;
    box-shadow: 0 12px 30px rgba(15, 41, 71, 0.06);
    border: 1px solid var(--border);
}

.feature-card h3 {
    margin-top: 0;
    margin-bottom: 12px;
}

.feature-card p {
    margin: 0;
    color: var(--muted);
}

.landing-footer {
    margin-top: 64px;
    text-align: center;
    padding: 28px 0;
    color: var(--muted);
}

.footer {
    background: #ffffff;
    padding: 22px 32px;
    text-align: center;
    border-top: 1px solid var(--border);
}

.admin-layout {
    display: flex;
    min-height: calc(100vh - 72px);
}

.sidebar {
    width: 260px;
    padding: 28px 24px;
    background: #ffffff;
    border-right: 1px solid var(--border);
}

.sidebar-header a {
    display: inline-block;
    margin-bottom: 28px;
    color: var(--dark-blue);
    font-size: 1.15rem;
    font-weight: 700;
    text-decoration: none;
}

.sidebar-menu {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.sidebar-menu a {
    color: var(--text);
    text-decoration: none;
    padding: 12px 16px;
    border-radius: 12px;
    transition: background 0.2s ease;
}

.sidebar-menu a:hover {
    background: var(--light-blue);
}

.admin-content {
    flex: 1;
    padding: 32px;
}

.page-header {
    margin-top: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}

.card-grid {
    display: grid;
    gap: 20px;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-top: 28px;
}

.stat-card {
    background: var(--card);
    border-radius: 20px;
    padding: 24px;
    border: 1px solid var(--border);
}

.stat-card h3 {
    margin-top: 0;
    margin-bottom: 12px;
    font-size: 1rem;
    color: var(--muted);
}

.stat-card p {
    margin: 0;
    font-size: 2rem;
    font-weight: 700;
}

.table-card,
.form-card,
.report-card {
    background: var(--card);
    border-radius: 20px;
    padding: 24px;
    border: 1px solid var(--border);
    margin-top: 24px;
}

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

table {
    width: 100%;
    border-collapse: collapse;
    min-width: 720px;
}

thead {
    background: #f0f4fc;
}

thead th,
tbody td {
    padding: 14px 16px;
    text-align: left;
    border-bottom: 1px solid #eef2f6;
}

tbody tr:hover {
    background: #f9fbff;
}

.btn-action,
.btn-primary,
.btn-secondary,
.btn-danger,
.btn-outline {
    border: none;
    padding: 10px 18px;
    border-radius: 12px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    font-weight: 600;
}

.btn-action {
    background: var(--blue);
    color: #fff;
}

.btn-secondary {
    background: var(--light-blue);
    color: var(--dark-blue);
}

.btn-danger {
    background: #ff6b6b;
    color: #fff;
}

.btn-outline {
    background: transparent;
    color: var(--dark-blue);
    border: 1px solid var(--border);
}

form {
    display: grid;
    gap: 18px;
}

.alert {
    background: #fff4d0;
    border: 1px solid #ffe08a;
    color: #7b5f00;
    padding: 16px;
    border-radius: 16px;
    margin-bottom: 18px;
}

.form-group {
    display: grid;
    gap: 8px;
}

label {
    font-weight: 600;
    color: var(--dark-blue);
}

input[type="text"],
input[type="date"],
input[type="email"],
select,
textarea {
    width: 100%;
    padding: 14px 16px;
    border-radius: 14px;
    border: 1px solid var(--border);
    background: #f9fbff;
    color: var(--text);
}

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

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

@media (max-width: 1024px) {
    .hero {
        grid-template-columns: 1fr;
    }

    .feature-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .admin-layout {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--border);
    }
}

@media (max-width: 720px) {
    .feature-grid {
        grid-template-columns: 1fr;
    }

    .card-grid {
        grid-template-columns: 1fr 1fr;
    }

    table {
        min-width: 540px;
    }
}

@media (max-width: 560px) {
    .card-grid {
        grid-template-columns: 1fr;
    }

    .navbar {
        flex-direction: column;
        align-items: flex-start;
    }

    .nav-menu {
        margin-top: 14px;
        display: flex;
        flex-wrap: wrap;
        gap: 14px;
    }
}