/* =====================================================================
   BOOKING PAGE — NHÀ HÀNG PHÌ LŨ
   Scoped to the public /dat-tiec Razor Page. All classes are prefixed
   with `booking-page` or `booking-form` so they never collide with
   `site.css` / `home.css` / `halls.css`.

   Phase 08 layout:
     - Editorial split: form on the left, trust panel on the right
     - Grouped fieldsets with legend + helper hint
     - Per-field helper text under each input
     - Hall preselection card above the form
     - Polished success state with primary + secondary actions
     - Mobile: trust panel stacks below the form
   ===================================================================== */

/* ---------- Page shell ---------- */
.booking-page {
    padding-top: var(--space-10);
    padding-bottom: var(--space-12);
    background-color: var(--color-paper);
}

.booking-page__head {
    max-width: 760px;
    margin: 0 auto var(--space-9);
    text-align: center;
}

.booking-page__head .eyebrow {
    justify-content: center;
}

.booking-page__title {
    font-size: var(--fs-h1);
    font-weight: 500;
    line-height: 1.1;
    letter-spacing: -0.015em;
    color: var(--color-ink);
}

.booking-page__title span {
    display: block;
}

.booking-page__title span:nth-child(even) {
    font-style: italic;
    color: var(--color-brown);
    font-weight: 600;
}

.booking-page__lede {
    margin-top: var(--space-5);
    font-size: var(--fs-body-lg);
    color: var(--color-muted-brown);
    line-height: 1.75;
    max-width: 60ch;
    margin-left: auto;
    margin-right: auto;
}

/* Two-column shell (form + trust) — collapses on mobile */
.booking-page__shell {
    width: 100%;
}

.booking-page__layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-9);
    align-items: start;
}

.booking-page__main {
    min-width: 0;
}

/* ---------- Form frame ---------- */
.booking-form {
    max-width: 760px;
    margin: 0 auto;
    padding: clamp(2rem, 4vw, 3.5rem) clamp(1.5rem, 4vw, 3rem);
    background-color: var(--color-ivory);
    border: 1px solid var(--color-border);
    position: relative;
}

.booking-form::before {
    content: "";
    position: absolute;
    inset: 10px;
    border: 1px solid var(--color-line);
    pointer-events: none;
}

.booking-form > * {
    position: relative;
    z-index: 1;
}

.booking-form__intro {
    margin-bottom: var(--space-6);
    font-family: var(--font-sans);
    font-size: var(--fs-body-sm);
    color: var(--color-muted-brown);
    letter-spacing: 0.04em;
}

.booking-form__notice {
    margin-bottom: var(--space-6);
    padding: var(--space-4) var(--space-5);
    background-color: var(--color-paper);
    border-left: 2px solid var(--color-brown);
    color: var(--color-brown);
    font-size: var(--fs-body-sm);
    line-height: 1.7;
}

.booking-form__summary {
    margin-bottom: var(--space-5);
    padding: var(--space-4) var(--space-5);
    background-color: var(--color-paper);
    border-left: 2px solid var(--color-brown);
    color: var(--color-brown);
    font-size: var(--fs-body-sm);
    line-height: 1.6;
}

.booking-form__summary:empty {
    display: none;
}

.booking-form__summary ul {
    list-style: disc;
    padding-left: var(--space-5);
}

/* ---------- Field groups (fieldsets) ---------- */
.booking-form__groups {
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
}

.booking-form__group {
    margin: 0;
    padding: 0;
    border: 0;
    min-width: 0;
}

.booking-form__legend {
    display: block;
    width: 100%;
    margin-bottom: var(--space-2);
    padding-bottom: var(--space-3);
    border-bottom: 1px solid var(--color-line);
    font-family: var(--font-serif);
    font-size: 1.375rem;
    font-weight: 600;
    color: var(--color-ink);
    letter-spacing: -0.005em;
    line-height: 1.3;
}

.booking-form__legend-hint {
    margin: 0 0 var(--space-5);
    font-family: var(--font-sans);
    font-size: var(--fs-body-sm);
    color: var(--color-muted-brown);
    line-height: 1.6;
}

/* ---------- Grid ---------- */
.booking-form__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-5) var(--space-6);
}

/* ---------- Fields ---------- */
.booking-form__field {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.booking-form__field--full {
    grid-column: 1 / -1;
}

.booking-form__field label {
    font-family: var(--font-sans);
    font-size: var(--fs-eyebrow);
    font-weight: 500;
    letter-spacing: 0.24em;
    text-transform: uppercase;
    color: var(--color-muted-brown);
}

.booking-form__field input,
.booking-form__field select,
.booking-form__field textarea {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-family: var(--font-sans);
    font-size: var(--fs-body);
    color: var(--color-brown);
    background-color: var(--color-paper);
    border: 1px solid var(--color-border);
    border-radius: 0;
    transition: border-color var(--dur-fast) var(--ease-soft),
                background-color var(--dur-fast) var(--ease-soft),
                box-shadow var(--dur-fast) var(--ease-soft);
}

.booking-form__field textarea {
    resize: vertical;
    min-height: 7.5rem;
    line-height: 1.7;
}

.booking-form__field input:focus,
.booking-form__field select:focus,
.booking-form__field textarea:focus {
    outline: none;
    border-color: var(--color-brown);
    background-color: var(--color-paper);
    box-shadow: 0 0 0 3px rgba(74, 58, 46, 0.10);
}

.booking-form__field input::placeholder,
.booking-form__field textarea::placeholder {
    color: var(--color-muted-brown);
    font-style: italic;
    opacity: 0.7;
}

.booking-form__hint {
    font-family: var(--font-sans);
    font-size: 0.8125rem;
    color: var(--color-muted-brown);
    line-height: 1.55;
    margin-top: var(--space-1);
}

/* invalid state — added by jQuery unobtrusive validation */
.booking-form__field input.input-validation-error,
.booking-form__field select.input-validation-error,
.booking-form__field textarea.input-validation-error {
    border-color: #B45252;
    background-color: #FBF6F4;
    box-shadow: 0 0 0 3px rgba(180, 82, 82, 0.10);
}

.booking-form__error {
    display: block;
    min-height: 1em;
    font-family: var(--font-sans);
    font-size: var(--fs-body-sm);
    color: #B45252;
    letter-spacing: 0.01em;
    /* Prevent long error messages from overflowing the field on small screens */
    overflow-wrap: anywhere;
    word-break: break-word;
}

.booking-form__error:empty {
    display: none;
}

/* ---------- Selected hall card ---------- */
.booking-form__selected {
    margin-bottom: var(--space-7);
    padding: var(--space-5) var(--space-6);
    background-color: var(--color-paper);
    border: 1px solid var(--color-border);
    border-left: 2px solid var(--color-champagne);
    position: relative;
}

.booking-form__selected-label {
    font-family: var(--font-sans);
    font-size: var(--fs-eyebrow);
    font-weight: 500;
    letter-spacing: 0.28em;
    text-transform: uppercase;
    color: var(--color-muted-brown);
    margin-bottom: var(--space-2);
}

.booking-form__selected-name {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-ink);
    line-height: 1.25;
    margin-bottom: var(--space-2);
}

.booking-form__selected-desc {
    font-size: var(--fs-body-sm);
    color: var(--color-brown);
    line-height: 1.6;
    margin-bottom: var(--space-3);
}

.booking-form__selected-note {
    font-size: 0.8125rem;
    color: var(--color-muted-brown);
    line-height: 1.6;
}

/* ---------- Actions ---------- */
.booking-form__actions {
    margin-top: var(--space-8);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-5);
}

.booking-form__actions .btn {
    flex: 0 0 auto;
}

.booking-form__actions .link-arrow {
    margin-top: 0;
}

.booking-form__footnote {
    margin-top: var(--space-6);
    font-size: var(--fs-body-sm);
    color: var(--color-muted-brown);
    line-height: 1.6;
}

.booking-form--error {
    text-align: center;
}

.booking-form--error .booking-form__intro {
    text-align: left;
    margin-bottom: var(--space-6);
}

.booking-form--error .booking-form__notice {
    text-align: left;
    margin-bottom: var(--space-7);
}

.booking-form--error .booking-form__notice code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.85em;
    color: var(--color-ink);
    word-break: break-all;
}

/* ---------- Success state ---------- */
.booking-page__success {
    max-width: 720px;
    margin: 0 auto;
    padding: clamp(2.5rem, 4vw, 4rem) clamp(1.5rem, 4vw, 3rem);
    text-align: center;
    background-color: var(--color-ivory);
    border: 1px solid var(--color-border);
    position: relative;
}

.booking-page__success::before {
    content: "";
    position: absolute;
    inset: 12px;
    border: 1px solid var(--color-line);
    pointer-events: none;
}

.booking-page__success > * {
    position: relative;
    z-index: 1;
}

.booking-page__success .eyebrow {
    justify-content: center;
}

.booking-page__success-title {
    font-family: var(--font-serif);
    font-size: clamp(1.75rem, 1.2rem + 1.5vw, 2.25rem);
    font-weight: 600;
    color: var(--color-ink);
    margin-bottom: var(--space-5);
    line-height: 1.25;
}

.booking-page__success-title span {
    display: block;
}

.booking-page__success-body {
    font-size: var(--fs-body-lg);
    color: var(--color-brown);
    line-height: 1.75;
    margin-bottom: var(--space-3);
}

.booking-page__success-note {
    color: var(--color-muted-brown);
    font-size: var(--fs-body-sm);
    margin-bottom: var(--space-7);
    line-height: 1.7;
}

.booking-page__success-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: var(--space-5);
}

.booking-page__success-actions .btn {
    flex: 0 0 auto;
}

.booking-page__success-actions .link-arrow {
    margin-top: 0;
}

/* ---------- Trust panel ---------- */
.booking-page__trust {
    min-width: 0;
}

.booking-trust {
    padding: clamp(2rem, 4vw, 3rem) clamp(1.5rem, 4vw, 2.5rem);
    background-color: var(--color-paper);
    border: 1px solid var(--color-border);
    position: relative;
}

.booking-trust::before {
    content: "";
    position: absolute;
    top: 0;
    left: var(--space-7);
    right: var(--space-7);
    height: 1px;
    background-color: var(--color-champagne);
}

.booking-trust .eyebrow {
    justify-content: flex-start;
}

.booking-trust__title {
    font-family: var(--font-serif);
    font-size: clamp(1.5rem, 1.1rem + 1vw, 1.875rem);
    font-weight: 600;
    color: var(--color-ink);
    line-height: 1.2;
    margin-bottom: var(--space-6);
}

.booking-trust__title span {
    display: block;
}

.booking-trust__title span:nth-child(even) {
    font-style: italic;
    color: var(--color-brown);
    font-weight: 600;
}

.booking-trust__list {
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
    margin-bottom: var(--space-6);
}

.booking-trust__step {
    display: grid;
    grid-template-columns: 56px 1fr;
    gap: var(--space-4);
    align-items: start;
}

.booking-trust__num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    font-family: var(--font-serif);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-brown);
    background-color: var(--color-ivory);
    border: 1px solid var(--color-border);
    border-radius: 50%;
}

.booking-trust__step-title {
    font-family: var(--font-sans);
    font-size: var(--fs-body);
    font-weight: 600;
    color: var(--color-ink);
    line-height: 1.45;
    margin-bottom: var(--space-2);
}

.booking-trust__step-body {
    font-size: var(--fs-body-sm);
    color: var(--color-muted-brown);
    line-height: 1.65;
}

.booking-trust__note {
    padding-top: var(--space-4);
    border-top: 1px solid var(--color-line);
    font-size: var(--fs-body-sm);
    color: var(--color-muted-brown);
    line-height: 1.7;
}

/* ---------- Visually-hidden helper ---------- */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ---------- Responsive ---------- */
@media (min-width: 720px) {
    .booking-form__grid {
        grid-template-columns: 1fr 1fr;
    }

    .booking-form__field--full {
        grid-column: 1 / -1;
    }
}

@media (min-width: 1024px) {
    .booking-page__layout {
        grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
        gap: var(--space-10);
    }

    /* Make the form span the wider left column edge-to-edge */
    .booking-form {
        max-width: none;
    }
}

@media (max-width: 599.98px) {
    .booking-form__legend {
        font-size: 1.25rem;
    }

    .booking-trust__step {
        grid-template-columns: 40px 1fr;
        gap: var(--space-3);
    }

    .booking-trust__num {
        width: 36px;
        height: 36px;
        font-size: 1rem;
    }

    .booking-page__success-actions {
        flex-direction: column;
    }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
    .booking-form__field input,
    .booking-form__field select,
    .booking-form__field textarea {
        transition: none;
    }
}