/* ==========================================================================
   Koto B&B — Shared Design System
   Warm boutique hospitality: burgundy + cream + gold, Lora display serif
   paired with a single clean sans. Mobile-first; every page links this file.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design tokens
   -------------------------------------------------------------------------- */
:root {
  /* Brand palette -------------------------------------------------------- */
  --color-primary: #6b0505;          /* deep burgundy / oxblood */
  --color-primary-dark: #4d0303;
  --color-primary-light: #8c1f1f;
  --color-secondary: #3f5344;        /* heritage garden green */
  --color-secondary-dark: #2c3a30;
  --color-accent: #b08d57;           /* brass / gold */
  --color-accent-light: #d4b98a;

  /* Warm supporting hues -------------------------------------------------- */
  --color-terracotta: #b5654a;
  --color-cream: #f7f2e8;            /* warm section background */
  --color-ivory: #efe9df;
  --color-sand: #e8e2d4;

  /* Neutrals -------------------------------------------------------------- */
  --color-bg: #ffffff;
  --color-bg-alt: var(--color-cream);
  --color-surface: #ffffff;
  --color-text: #373737;             /* body & heading text */
  --color-text-muted: #4a4a4a;
  --color-text-subtle: #776f68;
  --color-border: #e2dacb;
  --color-overlay: rgba(35, 22, 18, 0.55);

  /* Feedback -------------------------------------------------------------- */
  --color-success: #3f7a4a;
  --color-error: #a32a2a;

  /* Typography ------------------------------------------------------------ */
  --font-display: "Lora", "Iowan Old Style", Georgia, "Times New Roman", serif;
  --font-body: "Montserrat", "Inter", -apple-system, BlinkMacSystemFont,
    "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  --fw-regular: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fw-bold: 700;

  /* Type scale (mobile-first, fluid via clamp) ---------------------------- */
  --fs-h1: clamp(2.1rem, 1.35rem + 3.2vw, 3.75rem);
  --fs-h2: clamp(1.65rem, 1.15rem + 2.1vw, 2.75rem);
  --fs-h3: clamp(1.3rem, 1.05rem + 1.05vw, 1.85rem);
  --fs-h4: clamp(1.1rem, 1rem + 0.45vw, 1.35rem);
  --fs-body: 1.0625rem;              /* ~17px */
  --fs-small: 0.875rem;
  --fs-xs: 0.75rem;
  --fs-lead: clamp(1.125rem, 1.05rem + 0.45vw, 1.3rem);

  --lh-tight: 1.15;
  --lh-heading: 1.25;
  --lh-body: 1.7;

  --ls-wide: 0.14em;                 /* spaced uppercase eyebrow/heading */
  --ls-normal: 0.01em;

  /* Spacing scale --------------------------------------------------------- */
  --space-3xs: 0.25rem;
  --space-2xs: 0.5rem;
  --space-xs: 0.75rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.25rem;
  --space-xl: 3.5rem;
  --space-2xl: 5rem;
  --space-3xl: 7rem;

  /* Layout ---------------------------------------------------------------- */
  --container-max: 1180px;
  --container-narrow: 760px;
  --container-pad: 1.25rem;

  /* Radius ---------------------------------------------------------------- */
  --radius-xs: 2px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-pill: 999px;

  /* Shadows --------------------------------------------------------------- */
  --shadow-xs: 0 1px 2px rgba(35, 22, 18, 0.06);
  --shadow-sm: 0 2px 8px rgba(35, 22, 18, 0.07);
  --shadow-md: 0 8px 24px rgba(35, 22, 鼬18, 0.10);
  --shadow-lg: 0 18px 44px rgba(35, 22, 18, 0.14);

  /* Motion ---------------------------------------------------------------- */
  --transition-fast: 160ms ease;
  --transition-base: 260ms ease;

  --z-header: 100;
  --z-overlay: 200;
}

@media (min-width: 768px) {
  :root {
    --container-pad: 2rem;
  }
}

/* --------------------------------------------------------------------------
   2. Reset & base
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--fs-body);
  font-weight: var(--fw-regular);
  line-height: var(--lh-body);
  letter-spacing: var(--ls-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img,
picture,
svg,
video {
  max-width: 100%;
  height: auto;
  display: block;
}

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

a:hover,
a:focus-visible {
  color: var(--color-primary-light);
  text-decoration: underline;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  color: var(--color-primary);
  line-height: var(--lh-heading);
  margin: 0 0 var(--space-md);
  font-weight: var(--fw-semibold);
}

h1 {
  font-size: var(--fs-h1);
  line-height: var(--lh-tight);
  letter-spacing: var(--ls-normal);
}

h2 {
  font-size: var(--fs-h2);
}

h3 {
  font-size: var(--fs-h3);
}

h4 {
  font-size: var(--fs-h4);
}

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

p:last-child {
  margin-bottom: 0;
}

ul,
ol {
  margin: 0 0 var(--space-md);
  padding-left: 1.25rem;
}

small,
.text-small {
  font-size: var(--fs-small);
}

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

.text-center {
  text-align: center;
}

.lead {
  font-size: var(--fs-lead);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* Uppercase spaced eyebrow / section label */
.eyebrow {
  display: block;
  font-family: var(--font-body);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-xs);
}

::selection {
  background: var(--color-accent-light);
  color: var(--color-primary-dark);
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

/* --------------------------------------------------------------------------
   3. Layout helpers
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.container--narrow {
  max-width: var(--container-narrow);
}

.section {
  padding-block: var(--space-xl);
}

.section--alt {
  background-color: var(--color-bg-alt);
}

.section--dark {
  background-color: var(--color-secondary-dark);
  color: var(--color-ivory);
}

.section--dark h1,
.section--dark h2,
.section--dark h3,
.section--dark h4 {
  color: var(--color-ivory);
}

.section__head {
  text-align: center;
  max-width: var(--container-narrow);
  margin: 0 auto var(--space-lg);
}

@media (min-width: 768px) {
  .section {
    padding-block: var(--space-2xl);
  }
}

/* Flex helpers */
.stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.cluster {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-sm);
}

.split {
  display: grid;
  gap: var(--space-lg);
}

@media (min-width: 860px) {
  .split {
    grid-template-columns: repeat(2, 1fr);
    align-items: center;
    gap: var(--space-xl);
  }
}

/* Responsive grid */
.grid {
  display: grid;
  gap: var(--space-md);
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .grid--2 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .grid--3 {
    grid-template-columns: repeat(3, 1fr);
  }
  .grid--4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* --------------------------------------------------------------------------
   4. Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2xs);
  padding: 0.85em 1.75em;
  font-family: var(--font-body);
  font-size: var(--fs-small);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background-color var(--transition-base),
    color var(--transition-base), border-color var(--transition-base),
    transform var(--transition-fast), box-shadow var(--transition-base);
}

.btn:hover,
.btn:focus-visible {
  text-decoration: none;
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

.btn--primary {
  background-color: var(--color-primary);
  color: #fff;
  box-shadow: var(--shadow-sm);
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background-color: var(--color-primary-dark);
  color: #fff;
  box-shadow: var(--shadow-md);
}

.btn--secondary {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn--secondary:hover,
.btn--secondary:focus-visible {
  background-color: var(--color-primary);
  color: #fff;
}

.btn--accent {
  background-color: var(--color-accent);
  color: #fff;
}

.btn--accent:hover,
.btn--accent:focus-visible {
  background-color: var(--color-accent-light);
  color: var(--color-primary-dark);
}

.btn--ghost {
  background-color: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn--block {
  width: 100%;
}

.btn--lg {
  padding: 1em 2.25em;
  font-size: var(--fs-body);
}

/* --------------------------------------------------------------------------
   5. Cards & media
   -------------------------------------------------------------------------- */
.card {
  display: flex;
  flex-direction: column;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-xs);
  transition: box-shadow var(--transition-base),
    transform var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.card__media {
  aspect-ratio: 4 / 3;
  background-color: var(--color-sand);
  overflow: hidden;
}

.card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.card__body {
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-2xs);
  flex: 1;
}

.card__title {
  margin: 0;
  font-size: var(--fs-h4);
}

.card__text {
  margin: 0;
  color: var(--color-text-muted);
  font-size: var(--fs-small);
}

.card__footer {
  margin-top: auto;
  padding-top: var(--space-sm);
}

/* --------------------------------------------------------------------------
   6. Forms
   -------------------------------------------------------------------------- */
.form {
  display: grid;
  gap: var(--space-sm);
}

.form__field {
  display: flex;
  flex-direction: column;
  gap: var(--space-3xs);
}

.form__label {
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.form__input,
.form__textarea {
  width: 100%;
  padding: 0.8em 1em;
  font-family: inherit;
  font-size: var(--fs-body);
  color: var(--color-text);
  background-color: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.form__input:focus,
.form__textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(107, 5, 5, 0.12);
}

.form__input::placeholder {
  color: var(--color-text-subtle);
}

@media (min-width: 640px) {
  .form--inline {
    grid-auto-flow: column;
    align-items: end;
    gap: var(--space-sm);
  }
}

/* --------------------------------------------------------------------------
   7. Site chrome — header / nav / footer (reused verbatim on every page)
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background-color: rgba(255, 255, 255, 0.97);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(6px);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  min-height: 72px;
  padding-block: var(--space-2xs);
}

.brand {
  display: inline-flex;
  flex-direction: column;
  line-height: 1.05;
  text-decoration: none;
  color: var(--color-primary);
}

.brand:hover,
.brand:focus-visible {
  text-decoration: none;
  color: var(--color-primary-dark);
}

.brand__name {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: var(--fw-bold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.brand__tagline {
  font-size: var(--fs-xs);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--color-accent);
}

.site-nav {
  display: flex;
  align-items: center;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav__link {
  display: inline-block;
  padding: var(--space-3xs) 0;
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--color-text);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color var(--transition-fast),
    border-color var(--transition-fast);
}

.site-nav__link:hover,
.site-nav__link:focus-visible {
  color: var(--color-primary);
  border-bottom-color: var(--color-accent);
  text-decoration: none;
}

.site-nav__link[aria-current="page"] {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.site-nav__cta {
  margin-left: var(--space-2xs);
}

/* Mobile toggle + panel (CSS-only, checkbox driven) */
.nav-toggle {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.nav-toggle__button {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.nav-toggle__bar {
  display: block;
  height: 2px;
  width: 100%;
  background-color: var(--color-primary);
  border-radius: var(--radius-pill);
  transition: transform var(--transition-base), opacity var(--transition-fast);
}

@media (max-width: 899px) {
  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: block;
    background-color: #fff;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-2xs) var(--container-pad) var(--space-md);
  }

  .site-nav__link {
    display: block;
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--color-border);
  }

  .site-nav__cta {
    margin: var(--space-sm) 0 0;
  }

  .nav-toggle:checked ~ .site-nav {
    max-height: 32rem;
  }

  .nav-toggle:checked ~ .nav-toggle__button .nav-toggle__bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .nav-toggle:checked ~ .nav-toggle__button .nav-toggle__bar:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle:checked ~ .nav-toggle__button .nav-toggle__bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }
}

@media (min-width: 900px) {
  .nav-toggle__button {
    display: none;
  }
}

/* Footer ------------------------------------------------------------------ */
.site-footer {
  background-color: var(--color-secondary-dark);
  color: var(--color-ivory);
  padding-block: var(--space-xl) var(--space-md);
  margin-top: var(--space-2xl);
}

.site-footer a {
  color: var(--color-ivory);
  text-decoration: none;
}

.site-footer a:hover,
.site-footer a:focus-visible {
  color: var(--color-accent-light);
  text-decoration: underline;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

@media (min-width: 640px) {
  .site-footer__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .site-footer__grid {
    grid-template-columns: 1.4fr 1fr 1fr;
  }
}

.site-footer__brand {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: var(--fw-bold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #fff;
  margin-bottom: var(--space-2xs);
}

.site-footer__title {
  font-family: var(--font-body);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--color-accent-light);
  margin: 0 0 var(--space-sm);
}

.site-footer__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-2xs);
  font-size: var(--fs-small);
}

.site-footer__text {
  font-size: var(--fs-small);
  color: var(--color-ivory);
  margin: 0 0 var(--space-2xs);
}

.site-footer__tagline {
  font-family: var(--font-display);
  font-style: italic;
  color: var(--color-ivory);
  max-width: 34ch;
}

.site-footer__bottom {
  margin-top: var(--space-lg);
  padding-top: var(--space-md);
  border-top: 1px solid rgba(247, 242, 232, 0.18);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm) var(--space-md);
  align-items: center;
  justify-content: space-between;
  font-size: var(--fs-xs);
  color: rgba(247, 242, 232, 0.75);
}

.site-footer__social {
  display: flex;
  gap: var(--space-sm);
}

.site-footer__social a {
  font-size: var(--fs-xs);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
}

/* Badges ---------------------------------------------------------------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2xs);
  padding: var(--space-3xs) var(--space-sm);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--color-primary);
  background-color: var(--color-cream);
  border: 1px solid var(--color-accent-light);
  border-radius: var(--radius-pill);
}

/* Accessibility ---------------------------------------------------------- */
.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;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}