/* ==========================================================================
   Kimchi & Rice — Core stylesheet
   --------------------------------------------------------------------------
   ARCHITECTURE
   1. Design tokens (:root)      — every colour, font, spacing and radius
   2. Reset & base
   3. Layout primitives
   4. Components                 — header, cards, buttons, forms, footer
   5. Page-specific blocks
   6. Responsive (mobile-first — min-width queries only)

   RULE: component styles must reference var(--token) only.
         No hardcoded hex values below the :root block.
   ========================================================================== */

/* ==========================================================================
   1. DESIGN TOKENS — "Spicy Korean" palette
   ========================================================================== */

:root {
  /* --- Backgrounds --- */
  --color-bg-primary: #1c1b1a;      /* charcoal */
  --color-bg-secondary: #272524;    /* raised surfaces: cards, header */
  --color-bg-tertiary: #333030;     /* inputs, subtle fills */

  /* --- Text --- */
  --color-text-main: #f7f4ef;       /* rice white */
  --color-text-muted: #b0a9a1;
  --color-text-inverse: #1c1b1a;    /* text on brand-coloured fills */

  /* --- Brand --- */
  --color-brand-primary: #d7263d;   /* spicy red (gochujang) */
  --color-brand-primary-hover: #b21e31;
  --color-brand-secondary: #5aa469;  /* fresh green (spring onion) */
  --color-accent: #e8b923;           /* toasted sesame gold */

  /* --- Status --- */
  --color-error: #ff6b6b;
  --color-success: #4caf7d;

  /* --- Lines & surfaces --- */
  --color-border: #423e3c;
  --color-overlay: rgba(0, 0, 0, 0.55);

  /* --- Typography --- */
  --font-main: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-heading: Georgia, "Times New Roman", serif;
  --font-size-base: 1rem;
  --font-size-sm: 0.875rem;
  --font-size-lg: 1.125rem;
  --line-height-base: 1.6;
  --letter-spacing-wide: 0.08em;

  /* --- Spacing (all spacing derives from one unit) --- */
  --spacing-unit: 8px;
  --spacing-xs: calc(var(--spacing-unit) * 0.5);   /*  4px */
  --spacing-sm: var(--spacing-unit);               /*  8px */
  --spacing-md: calc(var(--spacing-unit) * 2);     /* 16px */
  --spacing-lg: calc(var(--spacing-unit) * 4);     /* 32px */
  --spacing-xl: calc(var(--spacing-unit) * 8);     /* 64px */

  /* --- Shape & depth --- */
  --border-radius-std: 8px;
  --border-radius-lg: 16px;
  --border-radius-pill: 999px;
  --border-width-std: 1px;
  --shadow-std: 0 2px 8px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.45);

  /* --- Motion --- */
  --transition-std: 0.2s ease-in-out;

  /* --- Layout --- */
  --content-max-width: 1140px;
  --dialog-max-width: 640px;
  --header-height: 64px;

  /* Logo. Change --logo-height to resize the mark in the header; the width
     follows the image's aspect ratio automatically. --logo-max-width is a
     safety stop so a very wide logo cannot push the navigation off the row. */
  --logo-height: 40px;
  --logo-max-width: 160px;
}

/* ==========================================================================
   2. RESET & BASE
   ========================================================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  background-color: var(--color-bg-primary);
  color: var(--color-text-main);
  font-family: var(--font-main);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-heading);
  line-height: 1.25;
  margin: 0 0 var(--spacing-md) 0;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }

p {
  margin: 0 0 var(--spacing-md) 0;
}

a {
  color: var(--color-brand-primary);
  text-decoration: none;
}

a:hover,
a:focus {
  text-decoration: underline;
}

img {
  max-width: 100%;
  display: block;
}

ul {
  padding-left: var(--spacing-lg);
}

/* Visible focus ring for keyboard users — required for the a11y exercises */
:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

/* Screen-reader-only 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;
}

/* Skip link — first tab stop on every page */
.skip-link {
  position: absolute;
  left: var(--spacing-sm);
  top: calc(var(--spacing-sm) * -10);
  z-index: 100;
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--color-accent);
  color: var(--color-text-inverse);
  border-radius: var(--border-radius-std);
  transition: top var(--transition-std);
}

.skip-link:focus {
  top: var(--spacing-sm);
}

/* ==========================================================================
   3. LAYOUT PRIMITIVES
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.section {
  padding: var(--spacing-lg) 0;
}

.section-header {
  margin-bottom: var(--spacing-lg);
}

.section-header p {
  color: var(--color-text-muted);
  margin: 0;
}

.grid {
  display: grid;
  gap: var(--spacing-md);
  grid-template-columns: 1fr;
}

.grid-week {
  grid-template-columns: repeat(5, 1fr);
}

/* Call-to-action sitting below a section's content */
.section-cta {
  margin-top: var(--spacing-lg);
}

/* ==========================================================================
   4. COMPONENTS
   ========================================================================== */

/* --- 4.1 Header & navigation ------------------------------------------- */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  background-color: var(--color-bg-secondary);
  border-bottom: var(--border-width-std) solid var(--color-border);
  box-shadow: var(--shadow-std);
}

.site-header .container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--spacing-sm);
  min-height: var(--header-height);
  padding-top: var(--spacing-sm);
  padding-bottom: var(--spacing-sm);
}

.site-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--color-text-main);
  text-decoration: none;
  margin-right: auto;
}

.site-brand:hover,
.site-brand:focus {
  text-decoration: none;
}

/* Logo sizing.
   --logo-height is the single knob: the width follows from the image's own
   aspect ratio, so swapping in a logo of a different shape needs no CSS
   change here. object-fit: contain guarantees the whole mark stays visible
   (cover would crop a wide logo's left and right edges). */
.site-brand img {
  height: var(--logo-height);
  width: auto;
  max-width: var(--logo-max-width);
  object-fit: contain;
}

.site-brand span {
  font-family: var(--font-heading);
  font-size: var(--font-size-lg);
  letter-spacing: var(--letter-spacing-wide);
}

.main-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs) var(--spacing-md);
  list-style: none;
  margin: 0;
  padding: 0;
}

.main-nav a {
  display: block;
  padding: var(--spacing-xs) 0;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color var(--transition-std), border-color var(--transition-std);
}

.main-nav a[aria-current="page"] {
  color: var(--color-text-main);
  border-bottom-color: var(--color-brand-primary);
}

.main-nav a:focus {
  color: var(--color-text-main);
  text-decoration: none;
}

/* --- 4.2 Buttons --------------------------------------------------------- */

.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  border: var(--border-width-std) solid transparent;
  border-radius: var(--border-radius-pill);
  font-family: var(--font-main);
  font-size: var(--font-size-base);
  font-weight: 600;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--transition-std), color var(--transition-std),
    border-color var(--transition-std);
}

.btn:hover,
.btn:focus {
  text-decoration: none;
}

.btn-primary {
  background-color: var(--color-brand-primary);
  color: var(--color-text-main);
}

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

.btn-secondary {
  background-color: transparent;
  color: var(--color-text-main);
  border-color: var(--color-brand-secondary);
}

.btn-secondary:hover,
.btn-secondary:focus {
  background-color: var(--color-brand-secondary);
  color: var(--color-text-inverse);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-text-main);
  border-color: var(--color-brand-secondary);
}

/* --- 4.3 Cards ----------------------------------------------------------- */

.card {
  display: flex;
  flex-direction: column;
  background-color: var(--color-bg-secondary);
  border: var(--border-width-std) solid var(--color-border);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-std);
  overflow: hidden;
}

.card-media img {
  width: 100%;
  height: 160px;
  object-fit: cover;
}

.card-body {
  padding: var(--spacing-md);
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.card-body h3,
.card-title {
  font-size: 1.25rem;
  margin: 0 0 var(--spacing-xs) 0;
}

.card-day {
  display: block;
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
  color: var(--color-brand-secondary);
}

.card-date {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-sm);
}

.card-desc {
  color: var(--color-text-muted);
  flex-grow: 1;
}

.card-price {
  font-weight: 700;
  color: var(--color-accent);
  margin: 0 0 var(--spacing-xs) 0;
}

.card-allergens {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin: 0;
}

/* "Today" highlight — applied by js/main.js */
.card.is-today {
  border-color: var(--color-brand-primary);
  box-shadow: var(--shadow-lg);
}

/* A working day whose dish has not been published yet. Muted, so it reads
   as "nothing here yet" rather than as a dish called "Still to be announced". */
.card.is-unannounced {
  border-style: dashed;
}

.card.is-unannounced .card-media img {
  opacity: 0.35;
  filter: grayscale(100%);
}

.card.is-unannounced .card-title {
  color: var(--color-text-muted);
  font-style: italic;
}

.badge-today {
  display: inline-block;
  align-self: flex-start;
  margin-bottom: var(--spacing-sm);
  padding: var(--spacing-xs) var(--spacing-sm);
  background-color: var(--color-brand-primary);
  color: var(--color-text-main);
  border-radius: var(--border-radius-pill);
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
}

/* --- 4.4 Forms ----------------------------------------------------------- */

.form {
  max-width: 640px;
}

.form-row {
  margin-bottom: var(--spacing-md);
}

.form-row label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 600;
}

.form-hint {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  font-weight: 400;
}

/* Required-field marker. aria-hidden in the markup: the inputs carry the
   `required` attribute, which screen readers announce themselves. */
.required {
  color: var(--color-brand-primary);
}

.form-note {
  margin-top: 0;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.form-row input,
.form-row select,
.form-row textarea {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--color-bg-tertiary);
  color: var(--color-text-main);
  border: var(--border-width-std) solid var(--color-border);
  border-radius: var(--border-radius-std);
  font-family: var(--font-main);
  font-size: var(--font-size-base);
  transition: border-color var(--transition-std);
}

.form-row input[type="email"]:focus-visible {
  outline-color: #8ecae6;
}

.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus {
  border-color: var(--color-brand-secondary);
}

.form-row textarea {
  min-height: 120px;
  resize: vertical;
}

.form-row.has-error input,
.form-row.has-error select,
.form-row.has-error textarea {
  border-color: var(--color-error);
}

.field-error {
  display: block;
  min-height: 1.2em;
  margin-top: var(--spacing-xs);
  color: var(--color-error);
  font-size: var(--font-size-sm);
}

/* Native validation bubbles are suppressed via novalidate in the markup;
   these messages are rendered by main.js instead. */

.alert {
  padding: var(--spacing-md);
  border-radius: var(--border-radius-std);
  border: var(--border-width-std) solid transparent;
  margin-bottom: var(--spacing-md);
}

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

/* Reservation details listed inside the success message */
.reservation-summary {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: var(--spacing-xs) var(--spacing-md);
  margin: 0;
}

.reservation-summary dt {
  font-weight: 600;
}

.reservation-summary dd {
  margin: 0;
  color: var(--color-text-main);
  white-space: pre-line;      /* keep line breaks from Special requests */
  overflow-wrap: anywhere;    /* long emails must not overflow on phones */
}

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

.is-hidden {
  display: none;
}

/* --- 4.5 Footer ---------------------------------------------------------- */

.site-footer {
  margin-top: var(--spacing-xl);
  padding: var(--spacing-lg) 0 var(--spacing-md) 0;
  background-color: var(--color-bg-secondary);
  border-top: var(--border-width-std) solid var(--color-border);
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

.footer-grid {
  display: grid;
  gap: var(--spacing-lg);
  grid-template-columns: 1fr;
}

.site-footer address {
  font-style: normal;
}

.site-footer h2 {
  font-size: var(--font-size-base);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
  color: var(--color-text-main);
  margin-bottom: var(--spacing-sm);
}

.site-footer ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-footer li {
  margin-bottom: var(--spacing-xs);
}

.site-footer a {
  color: var(--color-text-muted);
}

.site-footer a:hover,
.site-footer a:focus {
  color: var(--color-brand-primary);
}

.footer-bottom {
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-md);
  border-top: var(--border-width-std) solid var(--color-border);
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm) var(--spacing-md);
  justify-content: space-between;
}

.footer-bottom p {
  margin: 0;
}

/* ==========================================================================
   5. PAGE-SPECIFIC BLOCKS
   ========================================================================== */

/* Page body offset — the header is fixed */
.page-main {
  padding-top: calc(var(--header-height) + var(--spacing-lg));
  min-height: 60vh;
}

/* --- 5.1 Hero ----------------------------------------------------------- */

.hero {
  padding: var(--spacing-xl) 0;
  background-color: var(--color-bg-secondary);
  border-bottom: var(--border-width-std) solid var(--color-border);
  text-align: center;
}

.hero h1 {
  margin-bottom: var(--spacing-sm);
}

.hero-tagline {
  max-width: 52ch;
  margin: 0 auto var(--spacing-lg) auto;
  color: var(--color-text-muted);
  font-size: var(--font-size-lg);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  justify-content: center;
}

/* --- 5.2 Quick links ---------------------------------------------------- */

.quick-link {
  display: block;
  padding: var(--spacing-lg);
  background-color: var(--color-bg-secondary);
  border: var(--border-width-std) solid var(--color-border);
  border-left: 4px solid var(--color-brand-secondary);
  border-radius: var(--border-radius-std);
  color: var(--color-text-main);
  text-decoration: none;
  transition: border-color var(--transition-std), background-color var(--transition-std);
}

.quick-link:hover,
.quick-link:focus {
  border-left-color: var(--color-brand-primary);
  text-decoration: none;
}

.quick-link h3 {
  margin-bottom: var(--spacing-xs);
}

.quick-link p {
  margin: 0;
  color: var(--color-text-muted);
}

/* --- 5.3 Menu list (menu.html) ------------------------------------------ */

.menu-section {
  margin-bottom: var(--spacing-xl);
}

.menu-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--spacing-md);
  grid-template-columns: 1fr;
}

.menu-item {
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background-color: var(--color-bg-secondary);
  border: var(--border-width-std) solid var(--color-border);
  border-radius: var(--border-radius-std);
}

.menu-item img {
  width: 88px;
  height: 88px;
  flex-shrink: 0;
  object-fit: cover;
  border-radius: var(--border-radius-std);
}

.menu-item-text {
  flex-grow: 1;
}

.menu-item-head {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  align-items: baseline;
  justify-content: space-between;
}

.menu-item h3 {
  margin: 0;
  font-size: var(--font-size-base);
}

.menu-item-price {
  font-weight: 700;
  color: var(--color-accent);
  white-space: nowrap;
}

.menu-item-desc {
  margin: var(--spacing-xs) 0 0 0;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

.menu-item-korean {
  font-style: italic;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

/* Clickable card: the dish-name button's click area covers the whole card */
.menu-item {
  position: relative;
  cursor: pointer;
  transition: border-color var(--transition-std);
}

.menu-item:hover,
.menu-item:focus-within {
  border-color: var(--color-brand-primary);
}

.menu-item-open {
  padding: 0;
  border: 0;
  background: none;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.menu-item-open::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
}

/* Detail overlay */
.menu-dialog {
  width: min(90vw, var(--dialog-max-width));
  max-height: 90vh;
  padding: 0;
  border: var(--border-width-std) solid var(--color-border);
  border-radius: var(--border-radius-lg);
  background-color: var(--color-bg-secondary);
  color: var(--color-text-main);
  box-shadow: var(--shadow-lg);
  overflow-y: auto;
}

/* Written out rather than a token: ::backdrop does not inherit custom
   properties in every browser this site supports. */
.menu-dialog::backdrop {
  background-color: rgba(0, 0, 0, 0.75);
}

.menu-dialog-image {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  max-height: 60vh;
  object-fit: cover;
}

.menu-dialog-body {
  padding: var(--spacing-lg);
}

.menu-dialog-body h2 {
  margin: 0;
}

.menu-dialog-body .menu-item-price {
  display: block;
  font-size: var(--font-size-lg);
}

.menu-dialog-desc {
  color: var(--color-text-main);
}

.menu-dialog-close {
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-sm);
  width: 2.5rem;
  height: 2.5rem;
  border: 0;
  border-radius: var(--border-radius-pill);
  background-color: var(--color-bg-primary);
  color: var(--color-text-main);
  font-size: var(--font-size-lg);
  line-height: 1;
  cursor: pointer;
  transition: background-color var(--transition-std);
}

.menu-dialog-close:hover,
.menu-dialog-close:focus-visible {
  background-color: var(--color-brand-primary);
}

/* Dietary/heat labels ("Spicy", "Vegetarian") */
.tag {
  display: inline-block;
  margin-right: var(--spacing-xs);
  padding: 0 var(--spacing-sm);
  border-radius: var(--border-radius-pill);
  font-size: var(--font-size-sm);
  border: var(--border-width-std) solid var(--color-border);
  color: var(--color-text-muted);
}

.tag-spicy {
  border-color: var(--color-brand-primary);
  color: var(--color-brand-primary);
}

.tag-veg {
  border-color: var(--color-brand-secondary);
  color: var(--color-brand-secondary);
}

/* --- 5.4 About & legal prose -------------------------------------------- */

.prose {
  max-width: 70ch;
}

.prose h2 {
  margin-top: var(--spacing-lg);
}

.prose dl {
  margin: 0 0 var(--spacing-md) 0;
}

.prose dt {
  font-weight: 700;
  margin-top: var(--spacing-sm);
}

.prose dd {
  margin: 0 0 var(--spacing-xs) 0;
  color: var(--color-text-muted);
}

.info-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--spacing-lg);
}

.info-table th,
.info-table td {
  text-align: left;
  padding: var(--spacing-sm);
  border-bottom: var(--border-width-std) solid var(--color-border);
}

.info-table th {
  color: var(--color-text-main);
  font-weight: 600;
}

.info-table td {
  color: var(--color-text-muted);
}

/* ==========================================================================
   6. RESPONSIVE — mobile-first, min-width only
   ========================================================================== */

/* Tablet and up */
@media (min-width: 600px) {
  h1 { font-size: 2.5rem; }
  h2 { font-size: 1.875rem; }

  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }

  .menu-list { grid-template-columns: repeat(2, 1fr); }

  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

/* Desktop and up */
@media (min-width: 900px) {
  .grid-5 { grid-template-columns: repeat(5, 1fr); }

  .footer-grid { grid-template-columns: repeat(4, 1fr); }

  /* Nav hover state */
  .main-nav a:hover {
    color: var(--color-text-main);
    border-bottom-color: var(--color-brand-secondary);
  }
}

/* ==========================================================================
   7. PRINT
   ========================================================================== */

@media print {
  .site-header,
  .site-footer,
  .hero-actions {
    display: none;
  }

  body {
    background: #fff;
    color: #000;
  }
}