/* ==========================================================================
   Base layout
   ========================================================================== */

body {
    font-family: system-ui, Arial, sans-serif;
    max-width: 760px;
    margin: 40px auto;
    padding: 0 20px;
    line-height: 1.5;
    color: #222;
    background: #fff;
}

main {
    margin-top: 24px;
}


/* ==========================================================================
   Header and navigation
   ========================================================================== */

header {
    margin-bottom: 30px;
}

header h1 {
    margin-bottom: 12px;
}

nav {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

nav a {
    text-decoration: none;
}


/* ==========================================================================
   Cards and content blocks
   ========================================================================== */

.card {
    border: 1px solid #ddd;
    border-radius: 8px;
    padding: 18px;
    margin: 20px 0;
}

.reservation-summary p {
    margin: 6px 0;
}


/* ==========================================================================
   Forms
   ========================================================================== */

.form-field {
    margin-bottom: 18px;
}

label {
    display: block;
    font-weight: 600;
    margin-bottom: 4px;
}

input,
select,
textarea,
button {
    font: inherit;
    padding: 8px;
    width: 100%;
    box-sizing: border-box;
}

textarea {
    resize: vertical;
}

button {
    cursor: pointer;
    margin-top: 12px;
}

.field-help {
    margin: 5px 0 0;
    font-size: 0.92rem;
    color: #555;
}


/* ==========================================================================
   Messages and validation
   ========================================================================== */

.messages,
.form-errors,
.field-errors {
    color: #b00020;
    font-weight: 600;
}

.form-errors--summary {
    border: 1px solid #e0a0a0;
    background: #fff6f6;
    border-radius: 8px;
    padding: 12px;
    margin-bottom: 18px;
}

.field-errors p,
.form-errors p {
    margin: 5px 0;
}

.form-field--error input,
.form-field--error select,
.form-field--error textarea,
.form-field--client-error input,
.form-field--client-error select,
.form-field--client-error textarea {
    border: 2px solid #b00020;
}

.field-errors:empty {
    display: none;
}


/* ==========================================================================
   Mobile layout
   ========================================================================== */

@media (max-width: 600px) {
    body {
        margin: 24px auto;
        padding: 0 16px;
    }

    nav {
        flex-direction: column;
        gap: 6px;
    }
}