/* =============================================================
   ZEN TRANQUILITY — Design System
   Sushi Joe | Inspired by the Japanese concept of Ma
   ============================================================= */

@import url('https://fonts.googleapis.com/css2?family=Noto+Serif:ital,wght@0,400;0,600;0,700;1,400&family=Manrope:wght@400;500;600;700&display=swap');

/* === CSS Custom Properties (Design Tokens) === */
:root {
  /* Color Palette */
  --color-surface:                   #fbf9f4;
  --color-surface-dim:               #dbdad5;
  --color-surface-bright:            #fbf9f4;
  --color-surface-container-lowest:  #ffffff;
  --color-surface-container-low:     #f5f3ee;
  --color-surface-container:         #f0eee9;
  --color-surface-container-high:    #eae8e3;
  --color-surface-container-highest: #e4e2dd;
  --color-on-surface:                #1b1c19;
  --color-on-surface-variant:        #55423f;
  --color-inverse-surface:           #30312e;
  --color-inverse-on-surface:        #f2f1ec;
  --color-outline:                   #89726e;
  --color-outline-variant:           #dcc0bc;
  --color-surface-tint:              #9c4235;
  --color-primary:                   #000000;
  --color-on-primary:                #ffffff;
  --color-primary-container:         #410000;
  --color-on-primary-container:      #cb6657;
  --color-inverse-primary:           #ffb4a8;
  --color-secondary:                 #5e5e5e;
  --color-on-secondary:              #ffffff;
  --color-secondary-container:       #e2e2e2;
  --color-on-secondary-container:    #646464;
  --color-error:                     #ba1a1a;
  --color-on-error:                  #ffffff;
  --color-error-container:           #ffdad6;
  --color-on-error-container:        #93000a;
  --color-background:                #fbf9f4;
  --color-on-background:             #1b1c19;

  /* Brand Specific */
  --color-cinnabar:   #400000;
  --color-vermillion: #ff0000;
  --color-washi:      #f9f7f2;
  --color-ink:        #000000;
  --color-gold:       #b8860b;

  /* Typography Scale */
  --font-serif: 'Noto Serif', Georgia, 'Times New Roman', serif;
  --font-sans:  'Manrope', system-ui, -apple-system, sans-serif;

  --text-headline-xl: 48px;
  --text-headline-lg: 32px;
  --text-headline-md: 24px;
  --text-body-lg:     18px;
  --text-body-md:     16px;
  --text-label-caps:  12px;

  --leading-headline-xl: 1.2;
  --leading-headline-lg: 1.3;
  --leading-headline-md: 1.4;
  --leading-body:        1.6;
  --leading-label:       1.0;

  --tracking-headline-xl: -0.02em;
  --tracking-headline-lg: -0.01em;
  --tracking-caps:         0.15em;
  --tracking-wide:         0.1em;
  --tracking-widest:       0.3em;

  /* Spacing (Ma System — multiples of 8px) */
  --space-unit:   8px;
  --space-sm:     24px;
  --space-md:     48px;
  --space-lg:     80px;
  --space-gutter: 32px;
  --space-margin: 64px;

  /* Elevation (tonal, no shadows except micro-depth) */
  --shadow-none:     none;
  --shadow-floating: 0 32px 80px -16px rgba(64, 0, 0, 0.12);

  /* Transitions */
  --transition-fast:   150ms ease;
  --transition-base:   300ms ease;
  --transition-slow:   500ms ease;
  --transition-photo:  700ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* === Reset & Base === */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--color-surface);
  color: var(--color-on-surface);
  font-family: var(--font-sans);
  font-size: var(--text-body-md);
  line-height: var(--leading-body);
  min-height: 100vh;
}

/* Washi paper texture overlay */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='400' height='400'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='400' height='400' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 0;
}

img { display: block; max-width: 100%; }
a  { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }

/* === Typography Utilities === */
.type-headline-xl {
  font-family: var(--font-serif);
  font-size: clamp(32px, 5vw, var(--text-headline-xl));
  font-weight: 700;
  line-height: var(--leading-headline-xl);
  letter-spacing: var(--tracking-headline-xl);
}
.type-headline-lg {
  font-family: var(--font-serif);
  font-size: clamp(24px, 3.5vw, var(--text-headline-lg));
  font-weight: 600;
  line-height: var(--leading-headline-lg);
  letter-spacing: var(--tracking-headline-lg);
}
.type-headline-md {
  font-family: var(--font-serif);
  font-size: var(--text-headline-md);
  font-weight: 600;
  line-height: var(--leading-headline-md);
}
.type-body-lg {
  font-family: var(--font-sans);
  font-size: var(--text-body-lg);
  font-weight: 400;
  line-height: var(--leading-body);
}
.type-body-md {
  font-family: var(--font-sans);
  font-size: var(--text-body-md);
  font-weight: 400;
  line-height: var(--leading-body);
}
.type-label-caps {
  font-family: var(--font-sans);
  font-size: var(--text-label-caps);
  font-weight: 700;
  line-height: var(--leading-label);
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
}

/* === Color Utilities === */
.text-primary    { color: var(--color-primary); }
.text-cinnabar   { color: var(--color-cinnabar); }
.text-vermillion { color: var(--color-vermillion); }
.text-muted      { color: var(--color-on-surface-variant); }
.text-white      { color: #ffffff; }

.bg-surface      { background-color: var(--color-surface); }
.bg-container    { background-color: var(--color-surface-container); }
.bg-cinnabar     { background-color: var(--color-cinnabar); }
.bg-ink          { background-color: var(--color-ink); }
.bg-white        { background-color: #ffffff; }

/* === Layout Utilities === */
.container {
  width: 100%;
  max-width: 1440px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-margin);
  padding-right: var(--space-margin);
}
.container--narrow {
  max-width: 1200px;
}

@media (max-width: 1024px) {
  .container { padding-left: var(--space-md); padding-right: var(--space-md); }
}
@media (max-width: 640px) {
  .container { padding-left: var(--space-sm); padding-right: var(--space-sm); }
}

/* === Divider === */
.rule {
  width: 100%;
  height: 1px;
  background-color: var(--color-surface-container-high);
  border: none;
}
.rule--cinnabar {
  background-color: var(--color-cinnabar);
  opacity: 0.3;
}

/* === Hanko Mark (Japanese seal accent) === */
.hanko {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border: 2px solid var(--color-cinnabar);
  color: var(--color-cinnabar);
  flex-shrink: 0;
}
.hanko--circle {
  border-radius: 50%;
}
.hanko--sm {
  width: 32px;
  height: 32px;
  border-width: 1.5px;
}

/* === Primary Button === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  font-family: var(--font-sans);
  font-size: var(--text-label-caps);
  font-weight: 700;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  transition: background-color var(--transition-base), color var(--transition-base), border-color var(--transition-base);
}
.btn--primary {
  background-color: var(--color-cinnabar);
  color: #ffffff;
  border: 1px solid var(--color-cinnabar);
}
.btn--primary:hover {
  background-color: var(--color-ink);
  border-color: var(--color-ink);
}
.btn--outline {
  background-color: transparent;
  color: var(--color-on-surface);
  border: 1px solid currentColor;
}
.btn--outline:hover {
  background-color: var(--color-surface-container);
}
.btn--ghost {
  background-color: transparent;
  color: var(--color-cinnabar);
  border: 1px solid var(--color-cinnabar);
  padding: 10px 24px;
}
.btn--ghost:hover {
  background-color: var(--color-cinnabar);
  color: #ffffff;
}

/* === Chip / Tag / Badge === */
.chip {
  display: inline-block;
  padding: 4px 12px;
  font-family: var(--font-sans);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  background-color: var(--color-surface-container-high);
  color: var(--color-on-surface-variant);
}
.chip--active {
  background-color: var(--color-cinnabar);
  color: #ffffff;
}

.badge {
  display: inline-block;
  padding: 2px 8px;
  font-family: var(--font-sans);
  font-size: 9px;
  font-weight: 800;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  border-radius: 4px;
}
.badge--new {
  background-color: var(--color-cinnabar);
  color: #ffffff;
}

.menu-item__japanese {
  font-family: "Noto Serif JP", "Yu Mincho", "MS Mincho", serif;
  font-size: 14px;
  color: var(--color-cinnabar);
  opacity: 0.8;
  margin-top: 2px;
  margin-bottom: 4px;
  letter-spacing: 0.05em;
}

/* === Card === */
.card {
  background-color: var(--color-surface-container-low);
  border: 1px solid var(--color-surface-container-high);
  padding: var(--space-gutter);
}
.card--elevated {
  box-shadow: var(--shadow-floating);
}
.card--white {
  background-color: #ffffff;
}

/* === Form Inputs === */
.input-label {
  display: block;
  font-family: var(--font-sans);
  font-size: var(--text-label-caps);
  font-weight: 700;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--color-on-surface-variant);
  margin-bottom: 8px;
}
.input-field {
  width: 100%;
  padding: 12px 16px;
  font-family: var(--font-sans);
  font-size: var(--text-body-md);
  color: var(--color-on-surface);
  background-color: #ffffff;
  border: 1px solid var(--color-surface-container-high);
  outline: none;
  transition: border-color var(--transition-fast);
}
.input-field:focus {
  border-color: var(--color-cinnabar);
}
.input-field::placeholder {
  color: var(--color-surface-dim);
}

select.input-field {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2389726e' stroke-width='1.5' fill='none' stroke-linecap='square'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
  cursor: pointer;
}

/* === Navigation === */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background-color: rgba(251, 249, 244, 0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-surface-container-high);
  transition: box-shadow var(--transition-base);
}
.nav.scrolled {
  box-shadow: 0 4px 32px rgba(0,0,0,0.06);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 24px;
  padding-bottom: 24px;
}
.nav__brand {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: var(--tracking-widest);
  color: var(--color-cinnabar);
  text-transform: uppercase;
}
.nav__links {
  display: flex;
  align-items: center;
  gap: 40px;
}
.nav__link {
  font-family: var(--font-serif);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--color-on-surface-variant);
  transition: color var(--transition-fast);
  position: relative;
}
.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 1px;
  background-color: var(--color-cinnabar);
  transform: scaleX(0);
  transition: transform var(--transition-base);
  transform-origin: left;
}
.nav__link:hover { color: var(--color-cinnabar); }
.nav__link:hover::after { transform: scaleX(1); }
.nav__link--active {
  color: var(--color-cinnabar);
}
.nav__link--active::after { transform: scaleX(1); }

.nav__mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}
.nav__mobile-toggle span {
  display: block;
  width: 24px;
  height: 1.5px;
  background-color: var(--color-on-surface);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

@media (max-width: 768px) {
  .nav__links { display: none; }
  .nav__mobile-toggle { display: flex; }
  .nav__links.open {
    display: flex;
    flex-direction: column;
    gap: 0;
    position: fixed;
    top: 73px;
    left: 0;
    right: 0;
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-surface-container-high);
    padding: 16px 0;
    z-index: 99;
  }
  .nav__links.open .nav__link {
    padding: 14px var(--space-sm);
    border-bottom: 1px solid var(--color-surface-container);
  }
  .nav__links.open .btn { margin: 12px var(--space-sm) 0; width: calc(100% - 48px); justify-content: center; }
}

/* === Footer === */
.footer {
  background-color: var(--color-surface-container-low);
  border-top: 1px solid var(--color-surface-container-high);
  padding: var(--space-lg) 0 var(--space-md);
}
.footer__brand {
  font-family: var(--font-serif);
  font-size: 14px;
  letter-spacing: var(--tracking-widest);
  color: var(--color-cinnabar);
  text-transform: uppercase;
}
.footer__links {
  display: flex;
  gap: var(--space-gutter);
  flex-wrap: wrap;
}
.footer__link {
  font-family: var(--font-serif);
  font-size: 10px;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--color-on-surface-variant);
  transition: color var(--transition-fast);
}
.footer__link:hover { color: var(--color-cinnabar); }
.footer__copy {
  font-family: var(--font-serif);
  font-size: 10px;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--color-outline);
}

/* === Section Numbering === */
.section-number {
  font-family: var(--font-sans);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--color-cinnabar);
}

/* === Animations === */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes slideInLeft {
  from { opacity: 0; transform: translateX(-32px); }
  to   { opacity: 1; transform: translateX(0); }
}

.anim-fade-up { animation: fadeInUp 0.7s ease forwards; }
.anim-fade    { animation: fadeIn 0.5s ease forwards; }

/* Intersection Observer driven reveals */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* === Photo hover effect === */
.photo-hover {
  overflow: hidden;
}
.photo-hover img {
  transition: transform var(--transition-photo), filter var(--transition-slow);
}
.photo-hover:hover img {
  transform: scale(1.05);
}

/* === Grayscale reveal on hover === */
.grayscale-reveal img { filter: grayscale(100%); transition: filter var(--transition-slow); }
.grayscale-reveal:hover img { filter: grayscale(0%); }

/* === Status indicators === */
.status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-sans);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
}
.status__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}
.status--active { color: #15803d; }
.status--active .status__dot { background-color: #16a34a; }
.status--hidden { color: var(--color-on-surface-variant); }
.status--hidden .status__dot { background-color: var(--color-surface-dim); }

/* === Loading overlay === */
.loading-overlay {
  position: fixed;
  inset: 0;
  background-color: var(--color-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.5s ease;
}
.loading-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}
.loading-mark {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: var(--tracking-widest);
  color: var(--color-cinnabar);
  animation: pulse 1.5s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}

/* === Toast notifications === */
.toast-container {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 12px;
  pointer-events: none;
}
.toast {
  background-color: var(--color-inverse-surface);
  color: var(--color-inverse-on-surface);
  padding: 14px 20px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: 320px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.2);
  animation: toastIn 0.3s ease forwards;
  pointer-events: all;
}
.toast--success::before { content: '✓'; color: #4ade80; font-weight: 700; }
.toast--error::before   { content: '✕'; color: #f87171; font-weight: 700; }
@keyframes toastIn {
  from { opacity: 0; transform: translateX(32px); }
  to   { opacity: 1; transform: translateX(0); }
}