:root {
    --color-bg: #ffffff;
    --color-bg-alt: #f6f8fb;
    --color-text: #1a2233;
    --color-text-muted: #5b6474;
    --color-primary: #1d4ed8;
    --color-primary-dark: #1e3a8a;
    --color-border: #e2e6ee;
    --color-success-bg: #e8f8ee;
    --color-success-text: #157347;
    --color-error: #c0392b;
    --max-width: 1100px;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
}

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

a:hover {
    text-decoration: underline;
}

/* Header */

.site-header {
    border-bottom: 1px solid var(--color-border);
}

.site-header-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand {
    font-weight: 700;
    font-size: 1.15rem;
    color: var(--color-text);
    text-decoration: none;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.main-nav a {
    color: var(--color-text-muted);
    font-weight: 500;
    text-decoration: none;
}

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

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

.main-nav a.nav-cta {
    color: #fff;
    background: var(--color-primary);
    padding: 0.5rem 1rem;
    border-radius: 6px;
}

.main-nav a.nav-cta:hover {
    background: var(--color-primary-dark);
    text-decoration: none;
}

.main-nav a.nav-cta.active {
    background: var(--color-primary-dark);
    color: #fff;
}

/* Layout containers */

.page-section {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 3rem 1.5rem;
}

.page-section--narrow {
    max-width: 720px;
}

/* Hero */

.hero {
    background: var(--color-bg-alt);
    border-bottom: 1px solid var(--color-border);
}

.hero-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 4.5rem 1.5rem;
    text-align: center;
}

.hero h1 {
    font-size: 2.5rem;
    margin: 0 0 1rem;
}

.hero p {
    font-size: 1.15rem;
    color: var(--color-text-muted);
    max-width: 640px;
    margin: 0 auto 2rem;
}

.button {
    display: inline-block;
    background: var(--color-primary);
    color: #fff;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    font-weight: 600;
}

.button:hover {
    background: var(--color-primary-dark);
    text-decoration: none;
}

.button-secondary {
    background: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
    margin-left: 0.75rem;
}

.button-secondary:hover {
    background: var(--color-bg-alt);
}

/* Feature grid */

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.75rem;
    margin-top: 2.5rem;
}

.feature-card {
    border: 1px solid var(--color-border);
    border-radius: 10px;
    padding: 1.5rem;
}

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

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

/* Headings */

h2 {
    font-size: 1.75rem;
}

/* Forms */

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.4rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.65rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font-size: 1rem;
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 1px;
}

.field-error {
    color: var(--color-error);
    font-size: 0.875rem;
    margin-top: 0.35rem;
}

.form-alert {
    padding: 0.9rem 1.1rem;
    border-radius: 6px;
    margin-bottom: 1.5rem;
}

.form-alert--success {
    background: var(--color-success-bg);
    color: var(--color-success-text);
}

.form-alert--error {
    background: #fdecec;
    color: var(--color-error);
}

/* Footer */

.site-footer {
    border-top: 1px solid var(--color-border);
    margin-top: 4rem;
}

.site-footer-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: var(--color-text-muted);
    font-size: 0.9rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-nav a {
    color: var(--color-text-muted);
    margin-left: 1rem;
}

.footer-nav a:first-child {
    margin-left: 0;
}

/* Admin */

.admin-warning {
    color: var(--color-error);
    font-weight: 600;
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1.5rem;
}

.admin-table th,
.admin-table td {
    text-align: left;
    padding: 0.6rem 0.75rem;
    border-bottom: 1px solid var(--color-border);
    vertical-align: top;
}

.admin-table th {
    color: var(--color-text-muted);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.02em;
}