/* ========================================
   Salon Yukisora — Common Styles
   Mobile-first, white & black theme
   ======================================== */

:root {
  --color-bg: #ffffff;
  --color-text: #1a1a1a;
  --color-text-muted: #666666;
  --color-border: #e0e0e0;
  --color-accent: #1a1a1a;
  --color-accent-hover: #444444;
  --color-surface: #f8f8f8;
  --font-base: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic", "Meiryo", sans-serif;
  --font-heading: "Hiragino Mincho ProN", "Yu Mincho", "Georgia", serif;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  --max-width: 1100px;
  --header-height: 64px;
  --transition: 0.3s ease;
  --radius: 4px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

/* ---- Typography ---- */

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 500;
  line-height: 1.4;
}

h1 { font-size: 1.75rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.125rem; }

.section-title {
  text-align: center;
  margin-bottom: var(--space-lg);
}

.section-title h2 {
  font-size: 1.5rem;
  letter-spacing: 0.15em;
  margin-bottom: var(--space-xs);
}

.section-title p {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  letter-spacing: 0.1em;
}

/* ---- Layout ---- */

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

.section {
  padding: var(--space-xl) 0;
}

/* ---- Header ---- */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.header__logo {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  letter-spacing: 0.2em;
  font-weight: 500;
}

.header__logo span {
  display: block;
  font-size: 0.625rem;
  letter-spacing: 0.3em;
  color: var(--color-text-muted);
  font-family: var(--font-base);
  margin-top: 2px;
}

/* Hamburger */
.hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 1001;
}

.hamburger span {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--color-text);
  transition: var(--transition);
  transform-origin: center;
}

.hamburger.is-active span:nth-child(1) {
  transform: translateY(7.5px) rotate(45deg);
}

.hamburger.is-active span:nth-child(2) {
  opacity: 0;
}

.hamburger.is-active span:nth-child(3) {
  transform: translateY(-7.5px) rotate(-45deg);
}

/* Nav */
.nav {
  position: fixed;
  top: 0;
  right: -100%;
  width: 80%;
  max-width: 320px;
  height: 100vh;
  background: var(--color-bg);
  border-left: 1px solid var(--color-border);
  padding: calc(var(--header-height) + var(--space-lg)) var(--space-lg) var(--space-lg);
  transition: right var(--transition);
  z-index: 999;
}

.nav.is-open {
  right: 0;
}

.nav__overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 998;
}

.nav__overlay.is-visible {
  opacity: 1;
  visibility: visible;
}

.nav__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.nav__link {
  font-size: 0.9375rem;
  letter-spacing: 0.15em;
  padding: var(--space-xs) 0;
  border-bottom: 1px solid var(--color-border);
  transition: color var(--transition);
}

.nav__link:hover,
.nav__link.is-current {
  color: var(--color-text-muted);
}

.nav__cta {
  margin-top: var(--space-lg);
}

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

.btn {
  display: inline-block;
  padding: 0.875rem 2rem;
  font-size: 0.875rem;
  letter-spacing: 0.15em;
  text-align: center;
  border: 1px solid var(--color-accent);
  background: var(--color-accent);
  color: var(--color-bg);
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
  border-radius: var(--radius);
}

.btn:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
}

.btn--outline {
  background: transparent;
  color: var(--color-accent);
}

.btn--outline:hover {
  background: var(--color-accent);
  color: var(--color-bg);
}

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

.btn-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  align-items: center;
}

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

.hero {
  position: relative;
  height: 100vh;
  min-height: 560px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  margin-top: var(--header-height);
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

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

.hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(to bottom, rgba(0, 0, 0, 0.45) 0%, rgba(0, 0, 0, 0.2) 30%, rgba(0, 0, 0, 0.55) 100%),
    radial-gradient(ellipse at center, rgba(0, 0, 0, 0.35) 0%, rgba(0, 0, 0, 0.6) 100%);
}

.hero__content {
  position: relative;
  z-index: 1;
  text-align: center;
  color: #ffffff;
  padding: var(--space-md);
  opacity: 0;
  transform: translateY(20px);
  animation: heroFadeIn 1.2s ease forwards 0.3s;
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.4);
}

@keyframes heroFadeIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero__catch {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  letter-spacing: 0.1em;
  line-height: 1.6;
  margin-bottom: var(--space-md);
}

.hero__sub {
  font-size: 0.875rem;
  letter-spacing: 0.2em;
  margin-bottom: var(--space-lg);
  opacity: 0.9;
}

.hero .btn-group {
  width: fit-content;
  margin: 0 auto;
  align-items: stretch;
}

.hero .btn-group .btn {
  width: 100%;
  min-width: 15rem;
  white-space: nowrap;
  text-align: center;
  border-color: #ffffff;
  color: #ffffff;
  background: transparent;
  text-shadow: none;
}

.hero .btn-group .btn:hover {
  background: #ffffff;
  color: var(--color-text);
  border-color: #ffffff;
}

/* ---- Features ---- */

.features {
  background: var(--color-surface);
}

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

.feature-card {
  background: var(--color-bg);
  padding: var(--space-lg) var(--space-md);
  text-align: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.feature-card__number {
  font-family: var(--font-heading);
  font-size: 2rem;
  color: var(--color-border);
  margin-bottom: var(--space-sm);
}

.feature-card h3 {
  margin-bottom: var(--space-sm);
  letter-spacing: 0.1em;
}

.feature-card p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* ---- Cards (Menu) ---- */

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

.menu-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--color-bg);
}

.menu-card__image {
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.menu-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.menu-card:hover .menu-card__image img {
  transform: scale(1.03);
}

.menu-card__body {
  padding: var(--space-md);
}

.menu-card__body h3 {
  letter-spacing: 0.1em;
  margin-bottom: var(--space-xs);
}

.menu-card__desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}

.price-list {
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-sm);
}

.price-item {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: var(--space-xs) 0;
  font-size: 0.875rem;
}

.price-item__name {
  flex: 1;
}

.price-item__price {
  font-weight: 500;
  white-space: nowrap;
  margin-left: var(--space-sm);
}

/* ---- Testimonials ---- */

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

.testimonial-card {
  padding: var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
}

.testimonial-card__stars {
  color: var(--color-text);
  letter-spacing: 0.2em;
  font-size: 0.75rem;
  margin-bottom: var(--space-sm);
}

.testimonial-card__text {
  font-size: 0.875rem;
  margin-bottom: var(--space-sm);
  line-height: 1.9;
}

.testimonial-card__author {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-align: right;
}

/* ---- CTA Banner ---- */

.cta-banner {
  background: var(--color-accent);
  color: var(--color-bg);
  text-align: center;
  padding: var(--space-xl) var(--space-md);
}

.cta-banner h2 {
  font-size: 1.25rem;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-sm);
}

.cta-banner p {
  font-size: 0.875rem;
  opacity: 0.8;
  margin-bottom: var(--space-lg);
}

.cta-banner .btn {
  border-color: #ffffff;
  background: #ffffff;
  color: var(--color-text);
}

.cta-banner .btn:hover {
  background: transparent;
  color: #ffffff;
}

/* ---- About ---- */

.about-intro {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
  align-items: center;
}

.about-intro__image {
  aspect-ratio: 3 / 4;
  overflow: hidden;
  border-radius: var(--radius);
}

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

.about-intro__text h3 {
  margin-bottom: var(--space-sm);
  letter-spacing: 0.1em;
}

.about-intro__text p {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.gallery {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-sm);
}

.gallery__item {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: var(--radius);
}

.gallery__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.gallery__item:hover img {
  transform: scale(1.03);
}

/* ---- Access ---- */

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

.info-table {
  width: 100%;
}

.info-table tr {
  border-bottom: 1px solid var(--color-border);
}

.info-table th,
.info-table td {
  padding: var(--space-sm) 0;
  font-size: 0.875rem;
  text-align: left;
  vertical-align: top;
}

.info-table th {
  width: 30%;
  color: var(--color-text-muted);
  font-weight: normal;
  white-space: nowrap;
  padding-right: var(--space-sm);
}

.map-container {
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.map-container iframe {
  width: 100%;
  height: 100%;
  border: 0;
}

/* ---- Contact ---- */

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

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.form-group label {
  display: block;
  font-size: 0.8125rem;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-xs);
  color: var(--color-text-muted);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 0.9375rem;
  font-family: var(--font-base);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
  color: var(--color-text);
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
}

.form-group textarea {
  resize: vertical;
  min-height: 160px;
}

.contact-info {
  background: var(--color-surface);
  padding: var(--space-lg) var(--space-md);
  border-radius: var(--radius);
}

.contact-info h3 {
  margin-bottom: var(--space-md);
  letter-spacing: 0.1em;
}

.contact-info p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.contact-info a {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.contact-success {
  text-align: center;
  padding: var(--space-xl) var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
}

.contact-success__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  margin-bottom: var(--space-md);
  border: 1px solid var(--color-accent);
  border-radius: 50%;
  font-size: 1.5rem;
}

.contact-success__title {
  font-size: 1.25rem;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-md);
}

.contact-success__message {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 2;
  margin-bottom: var(--space-lg);
}

/* ---- Page Header ---- */

.page-header {
  margin-top: var(--header-height);
  padding: var(--space-xl) 0 var(--space-lg);
  text-align: center;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.page-header h1 {
  font-size: 1.5rem;
  letter-spacing: 0.2em;
  margin-bottom: var(--space-xs);
}

.page-header p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  letter-spacing: 0.1em;
}

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

.footer {
  background: var(--color-accent);
  color: #ffffff;
  padding: var(--space-xl) 0 var(--space-md);
}

.footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

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

.footer__logo {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  letter-spacing: 0.2em;
  margin-bottom: var(--space-sm);
}

.footer__desc {
  font-size: 0.8125rem;
  opacity: 0.7;
  line-height: 1.8;
}

.footer__nav-title {
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  opacity: 0.5;
  margin-bottom: var(--space-sm);
}

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

.footer__nav-list a {
  font-size: 0.8125rem;
  opacity: 0.8;
  transition: opacity var(--transition);
}

.footer__nav-list a:hover {
  opacity: 1;
}

.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding-top: var(--space-md);
  text-align: center;
  font-size: 0.75rem;
  opacity: 0.5;
}

/* ---- Scroll Animation ---- */

.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---- Utility ---- */

.text-center { text-align: center; }
.mt-lg { margin-top: var(--space-lg); }
.mb-lg { margin-bottom: var(--space-lg); }

/* ---- Responsive: Tablet ---- */

@media (min-width: 640px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.75rem; }

  .hero__catch {
    font-size: 2rem;
  }

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

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

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

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

  .btn-group {
    flex-direction: row;
    justify-content: center;
  }

  .about-intro {
    grid-template-columns: 1fr 1.2fr;
  }
}

/* ---- Responsive: Desktop ---- */

@media (min-width: 1024px) {
  .hamburger {
    display: none;
  }

  .nav {
    position: static;
    width: auto;
    max-width: none;
    height: auto;
    background: transparent;
    border: none;
    padding: 0;
    display: flex;
    align-items: center;
    gap: var(--space-lg);
  }

  .nav__overlay {
    display: none;
  }

  .nav__list {
    flex-direction: row;
    gap: var(--space-lg);
  }

  .nav__link {
    border-bottom: none;
    font-size: 0.8125rem;
  }

  .nav__cta {
    margin-top: 0;
  }

  .nav__cta .btn {
    padding: 0.625rem 1.5rem;
    font-size: 0.75rem;
  }

  .hero__catch {
    font-size: 2.5rem;
  }

  .section-title h2 {
    font-size: 1.75rem;
  }

  .footer__grid {
    grid-template-columns: 2fr 1fr 1fr;
  }

  .contact-layout {
    grid-template-columns: 1.5fr 1fr;
  }

  .access-info {
    grid-template-columns: 1fr 1fr;
  }
}