/* ============================================
   KM Korean – Design System & Styles
   Korean restaurant website
   ============================================ */

:root {
  /* Brand colors – Korean inspired */
  --color-primary: #C41E3A;       /* Korean red */
  --color-primary-dark: #9B1830;
  --color-primary-light: #E84A5F;
  --color-secondary: #1A1A1A;     /* Deep black */
  --color-accent: #D4A574;        /* Warm gold/beige */
  --color-bg: #FAF7F2;            /* Warm off-white */
  --color-bg-alt: #FFFFFF;
  --color-text: #1A1A1A;
  --color-text-muted: #5C5C5C;
  --color-border: #E8E0D5;
  --color-success: #2D6A4F;

  /* Typography */
  --font-display: "Playfair Display", Georgia, serif;
  --font-body: "Noto Sans KR", system-ui, sans-serif;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;

  /* Layout */
  --container: 1100px;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
  --header-h: 72px;
  --transition: 0.25s ease;
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button, input, select, textarea {
  font-family: inherit;
  font-size: 1rem;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-sm);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.6rem;
  border-radius: 50px;
  font-weight: 500;
  border: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}
.btn--primary {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}
.btn--primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  transform: translateY(-1px);
}
.btn--outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.7);
}
.btn--outline:hover {
  background: #fff;
  color: var(--color-primary);
  border-color: #fff;
}
.btn--whatsapp {
  background: #25D366;
  color: #fff;
  border-color: #25D366;
  width: 100%;
  margin-top: var(--space-sm);
}
.btn--whatsapp:hover { background: #1da851; }
.btn--full { width: 100%; }

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  background: rgba(250, 247, 242, 0.92);
  backdrop-filter: blur(12px);
  z-index: 100;
  border-bottom: 1px solid transparent;
  transition: var(--transition);
}
.header.scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow);
}
.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
}
.logo__kr {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 50%;
  font-size: 1.2rem;
  font-family: var(--font-body);
}
.logo__text {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--color-secondary);
}
.nav {
  display: flex;
  gap: 1.75rem;
}
.nav__link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: var(--transition);
  position: relative;
}
.nav__link:hover,
.nav__link.active { color: var(--color-primary); }
.header__cta { display: none; }
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-secondary);
  transition: var(--transition);
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, #1A1A1A 0%, #3D1A1A 50%, #C41E3A 100%);
  color: #fff;
  padding-top: var(--header-h);
}
.hero__overlay {
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.5;
}
.hero__content {
  position: relative;
  z-index: 1;
  padding: var(--space-2xl) 0;
  max-width: 700px;
}
.hero__eyebrow {
  font-size: 0.9rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}
.hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 6vw, 3.8rem);
  line-height: 1.15;
  margin-bottom: var(--space-md);
}
.hero__subtitle {
  font-size: 1.15rem;
  color: rgba(255,255,255,0.85);
  margin-bottom: var(--space-lg);
  max-width: 480px;
}
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

/* Highlights */
.highlights {
  padding: var(--space-lg) 0;
  margin-top: -40px;
  position: relative;
  z-index: 2;
}
.highlights__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-sm);
}
.highlight-card {
  background: var(--color-bg-alt);
  border-radius: var(--radius);
  padding: var(--space-md);
  text-align: center;
  box-shadow: var(--shadow);
  transition: var(--transition);
}
.highlight-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.highlight-card__icon { font-size: 1.8rem; margin-bottom: 0.5rem; }
.highlight-card h3 { font-size: 1rem; margin-bottom: 0.25rem; }
.highlight-card p { font-size: 0.85rem; color: var(--color-text-muted); }

/* Sections */
.section {
  padding: var(--space-2xl) 0;
}
.section__header {
  text-align: center;
  margin-bottom: var(--space-xl);
}
.section__eyebrow {
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  font-weight: 500;
  margin-bottom: 0.5rem;
}
.section__title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  margin-bottom: 0.5rem;
}
.section__desc {
  color: var(--color-text-muted);
  max-width: 480px;
  margin: 0 auto;
}

/* Menu */
.menu__tabs {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: var(--space-lg);
}
.menu__tab {
  padding: 0.55rem 1.25rem;
  border-radius: 50px;
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text-muted);
  cursor: pointer;
  font-weight: 500;
  transition: var(--transition);
}
.menu__tab:hover,
.menu__tab.active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}
.menu__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-md);
}
.menu-card {
  background: var(--color-bg-alt);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.menu-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.menu-card__img {
  height: 160px;
  background: linear-gradient(135deg, #3D1A1A, #C41E3A);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
}
.menu-card__body {
  padding: var(--space-md);
  flex: 1;
  display: flex;
  flex-direction: column;
}
.menu-card__cat {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  margin-bottom: 0.25rem;
}
.menu-card__name {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
}
.menu-card__desc {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  flex: 1;
  margin-bottom: var(--space-sm);
}
.menu-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.menu-card__price {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-primary);
}
.menu-card__add {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: none;
  background: var(--color-primary);
  color: #fff;
  font-size: 1.2rem;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}
.menu-card__add:hover { background: var(--color-primary-dark); transform: scale(1.08); }

/* About */
.about { background: var(--color-bg-alt); }
.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
}
.about__image-placeholder {
  aspect-ratio: 4/3;
  background: linear-gradient(135deg, #1A1A1A, #C41E3A);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: #fff;
}
.about__image-placeholder span {
  font-size: 4rem;
  font-weight: 700;
  opacity: 0.9;
}
.about__image-placeholder p {
  margin-top: 0.5rem;
  opacity: 0.7;
  letter-spacing: 0.1em;
}
.about__content .section__title { text-align: left; }
.about__content p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}
.about__list {
  margin-top: var(--space-md);
}
.about__list li {
  padding: 0.4rem 0;
  padding-left: 1.5rem;
  position: relative;
  color: var(--color-text);
}
.about__list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 700;
}

/* Order form */
.order { background: var(--color-bg); }
.order__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: var(--space-xl);
  align-items: start;
}
.order-form {
  background: var(--color-bg-alt);
  padding: var(--space-lg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm);
}
.form__group {
  margin-bottom: var(--space-sm);
}
.form__group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 0.35rem;
  color: var(--color-text);
}
.form__group input,
.form__group select,
.form__group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  transition: var(--transition);
  color: var(--color-text);
}
.form__group input:focus,
.form__group select:focus,
.form__group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(196, 30, 58, 0.12);
}
.form__hint {
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: var(--space-sm);
}
.order__info {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}
.info-card {
  background: var(--color-bg-alt);
  padding: var(--space-md);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.info-card h3 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
  color: var(--color-primary);
}
.info-card p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 0.25rem;
}

/* Contact */
.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-xl);
}
.contact__item {
  margin-bottom: var(--space-md);
}
.contact__item strong {
  display: block;
  margin-bottom: 0.25rem;
  color: var(--color-primary);
}
.contact__item p { color: var(--color-text-muted); }
.contact__socials {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: var(--space-md);
}
.social-link {
  padding: 0.5rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 500;
  transition: var(--transition);
}
.social-link:hover {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}
.map-placeholder {
  aspect-ratio: 16/10;
  background: var(--color-border);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
}
.map-placeholder p { font-weight: 600; margin-bottom: 0.25rem; }
.map-placeholder span { font-size: 0.85rem; }

/* Footer */
.footer {
  background: var(--color-secondary);
  color: rgba(255,255,255,0.8);
  padding: var(--space-xl) 0 var(--space-md);
}
.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-md);
}
.footer__brand .logo__kr { margin: 0 auto 0.5rem; }
.footer__brand .logo__text { color: #fff; display: block; margin-bottom: 0.35rem; }
.footer__brand p { font-size: 0.9rem; opacity: 0.7; }
.footer__links {
  display: flex;
  gap: 1.5rem;
}
.footer__links a:hover { color: var(--color-primary-light); }
.footer__copy {
  font-size: 0.8rem;
  opacity: 0.5;
  margin-top: var(--space-sm);
}

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--color-success);
  color: #fff;
  padding: 1rem 1.5rem;
  border-radius: 50px;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transition: 0.35s ease;
  z-index: 200;
  max-width: 90%;
  text-align: center;
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
.toast.error { background: var(--color-primary); }

/* Responsive */
@media (max-width: 900px) {
  .highlights__grid { grid-template-columns: repeat(2, 1fr); }
  .about__grid,
  .order__grid,
  .contact__grid { grid-template-columns: 1fr; }
  .about__image { order: -1; }
  .form__row { grid-template-columns: 1fr; }
  .header__cta { display: none; }
  .nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--color-bg);
    flex-direction: column;
    padding: var(--space-md);
    gap: 0;
    border-bottom: 1px solid var(--color-border);
    transform: translateY(-120%);
    opacity: 0;
    transition: var(--transition);
    pointer-events: none;
  }
  .nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav__link {
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--color-border);
  }
  .nav-toggle { display: flex; }
}

@media (max-width: 600px) {
  .highlights__grid { grid-template-columns: 1fr 1fr; }
  .hero__actions { flex-direction: column; }
  .hero__actions .btn { width: 100%; }
}