:root {
    --color-bg: #f4f5f7;
    --color-surface: #ffffff;
    --color-border: #d7dbe0;
    --color-text: #23272e;
    --color-text-muted: #5b6270;
    --color-primary: #375a7f;
    --color-primary-hover: #2c4763;
    --color-success-bg: #e6f4ea;
    --color-success-text: #1e6b34;
    --color-success-border: #b7ddc0;
    --color-error-bg: #fdecea;
    --color-error-text: #a3231a;
    --color-error-border: #f3c2bd;
    --color-warning-bg: #fff8e6;
    --color-warning-text: #8a6512;
    --color-warning-border: #f0dfa8;
    --radius: 6px;
    --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.5;
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 2rem 1.25rem 4rem;
}

.container.narrow {
    max-width: 480px;
    padding-top: 4rem;
}

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

header.site-header .container {
    padding-top: 1.25rem;
    padding-bottom: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

.brand {
    font-weight: 600;
    font-size: 1.15rem;
    color: var(--color-text);
    text-decoration: none;
}

nav.main-nav a {
    color: var(--color-text-muted);
    text-decoration: none;
    margin-left: 1.25rem;
    font-size: 0.95rem;
}

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

h1 {
    font-size: 1.6rem;
    margin-bottom: 0.4rem;
}

h2 {
    font-size: 1.15rem;
    margin-top: 2rem;
}

p.lead {
    color: var(--color-text-muted);
    margin-top: 0;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
}

.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.25rem;
    text-decoration: none;
    color: inherit;
    display: block;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.card:hover {
    border-color: var(--color-primary);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
}

.card h3 {
    margin: 0 0 0.35rem;
    font-size: 1.05rem;
}

.card p {
    margin: 0;
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.panel {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-top: 1.25rem;
}

fieldset {
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    margin: 0 0 1.25rem;
    padding: 1rem 1.25rem 1.25rem;
}

legend {
    padding: 0 0.4rem;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 0.9rem 1.25rem;
}

.form-row {
    margin-bottom: 0.9rem;
    display: flex;
    flex-direction: column;
}

.form-row label {
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 0.3rem;
    color: var(--color-text-muted);
}

.form-row .hint {
    font-size: 0.78rem;
    color: var(--color-text-muted);
    margin-top: 0.25rem;
}

input[type="text"],
input[type="email"],
input[type="number"],
input[type="password"],
select,
textarea {
    font: inherit;
    padding: 0.5rem 0.6rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: #fff;
    color: var(--color-text);
    width: 100%;
}

textarea {
    resize: vertical;
    min-height: 140px;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(55, 90, 127, 0.15);
}

.password-wrapper {
    display: flex;
    gap: 0.4rem;
}

.password-wrapper input {
    flex: 1;
}

.checkbox-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.9rem;
}

.checkbox-row input {
    width: auto;
}

.checkbox-row label {
    margin: 0;
    font-weight: 500;
    color: var(--color-text);
}

.btn {
    display: inline-block;
    font: inherit;
    font-weight: 600;
    padding: 0.55rem 1.1rem;
    border-radius: var(--radius);
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
}

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

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

.btn-secondary {
    background: #fff;
    border-color: var(--color-border);
    color: var(--color-text);
}

.btn-secondary:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.btn-toggle {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 0.5rem 0.7rem;
    cursor: pointer;
}

.alert {
    border-radius: var(--radius);
    padding: 0.75rem 1rem;
    margin: 1rem 0;
    border: 1px solid transparent;
    font-size: 0.92rem;
}

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

.alert-error {
    background: var(--color-error-bg);
    color: var(--color-error-text);
    border-color: var(--color-error-border);
}

.alert-warning {
    background: var(--color-warning-bg);
    color: var(--color-warning-text);
    border-color: var(--color-warning-border);
}

pre.debug-log {
    background: #1e2127;
    color: #d6dbe1;
    padding: 1rem;
    border-radius: var(--radius);
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    max-height: 420px;
    overflow-y: auto;
}

.badge {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.15rem 0.5rem;
    border-radius: 999px;
    margin-left: 0.5rem;
}

.badge-error { background: var(--color-error-bg); color: var(--color-error-text); }
.badge-tls { background: var(--color-warning-bg); color: var(--color-warning-text); }

footer.site-footer {
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.8rem;
    padding: 2rem 0;
}

.actions {
    display: flex;
    gap: 0.75rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}