/* ============================================
   Hillside Auto — B Version
   NOT A HOTEL-inspired Minimal Design
   ============================================ */

/* --- Design Tokens --- */
:root {
  /* Colors — Pure Black & White */
  --black: #000000;
  --white: #ffffff;
  --gray-100: #f7f7f7;
  --gray-200: #ebebeb;
  --gray-300: #ccc;
  --gray-500: #888;
  --gray-700: #444;
  --gray-900: #111;

  /* Mapped tokens */
  --color-primary-dark: var(--black);
  --color-accent: var(--black);
  --color-accent-hover: var(--gray-900);
  --color-white: var(--white);
  --color-light-gray: var(--gray-100);
  --color-text-dark: var(--black);
  --color-text-light: var(--white);
  --color-border: var(--gray-200);
  --color-overlay: rgba(0, 0, 0, 0.5);

  /* Typography */
  --font-en: 'Inter', system-ui, -apple-system, sans-serif;
  --font-jp: 'Noto Sans JP', sans-serif;
  --font-serif-en: 'Cormorant Garamond', Georgia, serif;
  --font-serif-jp: 'Noto Serif JP', serif;
  --font-body: var(--font-en), var(--font-jp);

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 4rem;
  --space-3xl: 7rem;
  --space-4xl: 10rem;

  /* Layout */
  --max-width: 1200px;
  --header-height: 60px;

  /* No shadows, no radius */
  --shadow-sm: none;
  --shadow-md: none;
  --shadow-lg: none;
  --shadow-header: none;
  --border-radius: 0;
  --border-radius-lg: 0;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

body {
  font-family: var(--font-en);
  color: var(--black);
  background-color: var(--white);
  line-height: 1.8;
  font-size: 14px;
  font-weight: 400;
  overflow-x: hidden;
  letter-spacing: 0.02em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

ul, ol {
  list-style: none;
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
  border: none;
  outline: none;
  background: none;
}

button {
  cursor: pointer;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-en);
  line-height: 1.2;
  font-weight: 400;
  letter-spacing: 0.01em;
}

body.lang-ja h1,
body.lang-ja h2,
body.lang-ja h3 {
  font-family: var(--font-serif-jp);
  letter-spacing: 0.05em;
}

body.lang-en h1,
body.lang-en h2,
body.lang-en h3 {
  font-family: var(--font-serif-en);
  letter-spacing: -0.01em;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.6rem; }
h3 { font-size: 1.1rem; }
h4 { font-size: 1rem; }

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

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

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

.section {
  padding: var(--space-3xl) 0;
}

.section--dark {
  background-color: var(--black);
  color: var(--white);
}

.section__header {
  margin-bottom: var(--space-2xl);
}

.section__header h2 {
  margin-top: var(--space-sm);
}

.section__label {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gray-500);
}

.section__label--light {
  color: var(--gray-500);
}

.section__cta {
  margin-top: var(--space-2xl);
  text-align: center;
}

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

.grid--2 { grid-template-columns: 1fr; }
.grid--3 { grid-template-columns: 1fr; }
.grid--4 { grid-template-columns: 1fr 1fr; }

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

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

/* --- Bilingual Display --- */
[data-lang-ja],
[data-lang-en] {
  display: none !important;
}

body.lang-ja [data-lang-ja] { display: block !important; }
body.lang-en [data-lang-en] { display: block !important; }

body.lang-ja span[data-lang-ja],
body.lang-ja a[data-lang-ja],
body.lang-en span[data-lang-en],
body.lang-en a[data-lang-en] {
  display: inline !important;
}

body.lang-ja h1[data-lang-ja],
body.lang-ja h2[data-lang-ja],
body.lang-ja h3[data-lang-ja],
body.lang-ja h4[data-lang-ja],
body.lang-en h1[data-lang-en],
body.lang-en h2[data-lang-en],
body.lang-en h3[data-lang-en],
body.lang-en h4[data-lang-en] {
  display: block !important;
}

body.lang-ja p[data-lang-ja],
body.lang-en p[data-lang-en] {
  display: block !important;
}

body.lang-ja div[data-lang-ja].flex-center,
body.lang-en div[data-lang-en].flex-center {
  display: flex !important;
}

body.lang-ja li[data-lang-ja],
body.lang-en li[data-lang-en] {
  display: list-item !important;
}

body.lang-ja label[data-lang-ja],
body.lang-en label[data-lang-en] {
  display: block !important;
}

body.lang-ja option[data-lang-ja],
body.lang-en option[data-lang-en] {
  display: block !important;
}

body.lang-ja div[data-lang-ja],
body.lang-en div[data-lang-en] {
  display: block !important;
}

body.lang-ja .form-group:not(.has-error) .form-error[data-lang-ja],
body.lang-en .form-group:not(.has-error) .form-error[data-lang-en] {
  display: none !important;
}

.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;
}