:root {
    --color-bg: #0f1420;
    --color-surface: #1a2233;
    --color-surface-2: #222c42;
    --color-border: #2e3a54;
    --color-text: #e7ecf5;
    --color-text-dim: #9aa7c2;
    --color-accent: #5b8def;
    --color-accent-hover: #4472d6;
    --color-error: #ef5b5b;
    --color-success: #4caf7d;
    --radius: 10px;
    --max-width: 760px;
}

* { 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: 1.55;
}

a { color: var(--color-accent); }

.site-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--color-border);
}

.brand {
    display: flex;
    flex-direction: column;
    text-decoration: none;
}

.brand-logo {
    height: 28px;
    width: auto;
    display: block;
}

.brand-tagline {
    font-size: 0.8rem;
    color: var(--color-text-dim);
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.site-nav a { text-decoration: none; }
.site-nav a:hover { text-decoration: underline; }

.current-user {
    font-size: 0.85rem;
    color: var(--color-text-dim);
}

.lang-switch a {
    margin-left: 0.35rem;
    padding: 0.2rem 0.5rem;
    border-radius: 6px;
    font-size: 0.85rem;
}

.lang-switch a.active {
    background: var(--color-surface-2);
    color: var(--color-text);
}

.site-main {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 2rem 1.5rem 4rem;
}

.site-footer {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 2rem 1.5rem;
    color: var(--color-text-dim);
    font-size: 0.85rem;
}

.site-footer a { color: var(--color-text-dim); }
.site-footer .sep { margin: 0 0.5rem; }

.landing h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.landing .lead {
    color: var(--color-text-dim);
    font-size: 1.1rem;
}

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

.example-box h2 {
    margin-top: 0;
    font-size: 1.05rem;
}

.access-box, .message-form, .dashboard, .admin, .legal {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-top: 2rem;
}

.legal { max-width: none; }
.legal h2 { font-size: 1.1rem; margin-top: 1.5rem; }

form { display: flex; flex-direction: column; gap: 0.4rem; margin-top: 1rem; }

label {
    font-size: 0.9rem;
    color: var(--color-text-dim);
    margin-top: 0.6rem;
}

.hint {
    font-size: 0.8rem;
    color: var(--color-text-dim);
    margin: 0.2rem 0 0.6rem;
}

label.checkbox {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-text);
    flex-direction: row;
}

input[type="text"],
input[type="email"],
input[type="datetime-local"],
input[type="file"],
textarea {
    background: var(--color-surface-2);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    padding: 0.6rem 0.7rem;
    color: var(--color-text);
    font-size: 1rem;
    font-family: inherit;
}

textarea { resize: vertical; }

button, .button {
    align-self: flex-start;
    background: var(--color-accent);
    color: #fff;
    border: none;
    border-radius: 6px;
    padding: 0.65rem 1.2rem;
    font-size: 1rem;
    cursor: pointer;
    text-decoration: none;
    margin-top: 1rem;
    display: inline-block;
}

button:hover, .button:hover { background: var(--color-accent-hover); }

.link-button {
    background: none;
    border: none;
    color: var(--color-accent);
    padding: 0;
    margin: 0;
    font-size: 0.9rem;
    text-decoration: underline;
    cursor: pointer;
}

.inline-form { display: inline; margin: 0; }

.error {
    background: rgba(239, 91, 91, 0.12);
    border: 1px solid var(--color-error);
    color: var(--color-error);
    padding: 0.6rem 0.9rem;
    border-radius: 6px;
    font-size: 0.9rem;
}

.notice {
    background: rgba(91, 141, 239, 0.12);
    border: 1px solid var(--color-accent);
    padding: 0.6rem 0.9rem;
    border-radius: 6px;
    font-size: 0.9rem;
}

.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.messages-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1.5rem;
    font-size: 0.9rem;
}

.messages-table th, .messages-table td {
    text-align: left;
    padding: 0.6rem 0.5rem;
    border-bottom: 1px solid var(--color-border);
}

.status {
    padding: 0.15rem 0.55rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
}

.status-pending { background: rgba(91, 141, 239, 0.18); color: var(--color-accent); }
.status-sent { background: rgba(76, 175, 125, 0.18); color: var(--color-success); }
.status-canceled { background: rgba(154, 167, 194, 0.18); color: var(--color-text-dim); }
.status-failed { background: rgba(239, 91, 91, 0.18); color: var(--color-error); }

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
}

.stat {
    background: var(--color-surface-2);
    border-radius: var(--radius);
    padding: 1rem;
    text-align: center;
}

.stat-value { display: block; font-size: 1.6rem; font-weight: 700; }
.stat-label { display: block; font-size: 0.8rem; color: var(--color-text-dim); margin-top: 0.2rem; }

@media (prefers-color-scheme: light) {
    :root {
        --color-bg: #f5f7fb;
        --color-surface: #ffffff;
        --color-surface-2: #eef1f8;
        --color-border: #dde3ef;
        --color-text: #1b2434;
        --color-text-dim: #5b6478;
    }
}