:root {
    --color-primary: #2f6f4f;
    --color-primary-dark: #234f38;
    --color-accent: #e08a2c;
    --color-bg: #faf8f3;
    --color-card: #ffffff;
    --color-text: #2b2b28;
    --color-muted: #6b6b63;
    --color-border: #e3ddd0;
    --color-danger: #b3402a;
    --radius: 10px;
    font-size: 16px;
}

* { box-sizing: border-box; }

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

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.site-header {
    background: var(--color-primary);
    color: #fff;
    padding: 14px 0;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px;
}

.brand {
    color: #fff;
    font-weight: 700;
    font-size: 1.3rem;
    text-decoration: none;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 16px;
}

.main-nav a {
    color: #f1f1e9;
    text-decoration: none;
    font-weight: 500;
}

.main-nav a:hover { text-decoration: underline; }

.lang-switch a { color: #f1f1e9; }
.lang-switch a.active { font-weight: 700; text-decoration: underline; }

/* Hero */
.hero {
    text-align: center;
    padding: 40px 0 20px;
}

.hero h1 {
    margin: 0 0 8px;
    color: var(--color-primary-dark);
    font-size: 2.2rem;
}

.tagline {
    color: var(--color-muted);
    font-size: 1.1rem;
}

/* Alerts */
.alert {
    padding: 14px 18px;
    border-radius: var(--radius);
    margin: 16px 0;
}

.alert p { margin: 4px 0 0; }

.alert-success { background: #e6f4ea; border: 1px solid #b7dfc4; color: #1f5c34; }
.alert-error { background: #fbeae6; border: 1px solid #edb9ab; color: var(--color-danger); }
.alert-info { background: #eef3fb; border: 1px solid #bcd2ef; color: #2b4d78; }

/* Schedule */
.schedule h2 { color: var(--color-primary-dark); }
.muted { color: var(--color-muted); margin-top: -8px; }
.empty-state { color: var(--color-muted); font-style: italic; padding: 30px 0; text-align: center; }

.session-list {
    display: grid;
    gap: 16px;
    margin: 20px 0 40px;
}

.session-card {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 18px 20px;
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    align-items: center;
    justify-content: space-between;
}

.session-card.is-full { opacity: 0.7; }

.session-info { display: flex; flex-wrap: wrap; gap: 6px 18px; align-items: baseline; flex: 1 1 260px; }

.session-date { font-weight: 600; color: var(--color-primary-dark); }
.session-time { font-weight: 600; }
.session-subject { color: var(--color-text); }

.session-spots {
    font-size: 0.9rem;
    color: var(--color-accent);
    font-weight: 600;
}

.session-spots.full { color: var(--color-danger); }

.booking-form {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.booking-form input {
    padding: 8px 10px;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font-size: 0.95rem;
}

/* Buttons */
button, .button-link {
    background: var(--color-primary);
    color: #fff;
    border: none;
    padding: 9px 18px;
    border-radius: 6px;
    font-size: 0.95rem;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
}

button:hover, .button-link:hover { background: var(--color-primary-dark); }

button.danger { background: var(--color-danger); }
button.danger:hover { background: #8f3320; }

.link-button {
    background: none;
    color: var(--color-danger);
    padding: 0;
    text-decoration: underline;
    font-size: 0.9rem;
}
.link-button:hover { background: none; color: #8f3320; }

/* Cancel page */
.cancel-box {
    max-width: 480px;
    margin: 40px auto;
    text-align: center;
}

/* Footer */
.site-footer {
    margin-top: 50px;
    padding: 20px 0;
    border-top: 1px solid var(--color-border);
    color: var(--color-muted);
    font-size: 0.85rem;
    text-align: center;
}

/* Admin */
.login-page {
    max-width: 360px;
    margin: 60px auto;
    text-align: center;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 16px;
}

.login-form input {
    padding: 10px;
    border: 1px solid var(--color-border);
    border-radius: 6px;
}

.session-form {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 20px;
    margin: 16px 0 36px;
}

.form-row { margin-bottom: 12px; }
.form-row-inline { display: flex; gap: 16px; flex-wrap: wrap; }
.form-row-inline label { flex: 1 1 140px; }

.session-form label {
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: 0.9rem;
    color: var(--color-muted);
}

.session-form input {
    padding: 8px 10px;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font-size: 1rem;
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-card);
    border-radius: var(--radius);
    overflow: hidden;
}

.admin-table th, .admin-table td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--color-border);
    text-align: left;
    font-size: 0.92rem;
}

.admin-table th { background: #f2efe6; color: var(--color-primary-dark); }

.admin-table .actions { display: flex; gap: 12px; align-items: center; white-space: nowrap; }

.bookings-row td { background: #fbfaf6; }

.bookings-table { width: 100%; border-collapse: collapse; margin-top: 8px; }
.bookings-table th, .bookings-table td { padding: 6px 10px; border-bottom: 1px solid var(--color-border); font-size: 0.88rem; }

@media (max-width: 600px) {
    .header-inner { flex-direction: column; align-items: flex-start; }
    .admin-table { display: block; overflow-x: auto; }
}