/* ============================================
   Hillside Auto Corporation - Main Styles
   ============================================ */

/* --- Design Tokens --- */
:root {
  /* Colors — Professional Green palette
     Inspired by John Deere, Land Rover, TD Bank
     Green = trust, safety, growth — ideal for automotive */
  --color-primary-dark: #1B5E20;
  --color-primary-darker: #0D3B12;
  --color-accent: #2E7D32;
  --color-accent-hover: #256B29;
  --color-accent-bright: #4CAF50;
  --color-accent-light: #E8F5E9;
  --color-warm: #F9A825;
  --color-warm-hover: #F28D00;
  --color-white: #FFFFFF;
  --color-light-gray: #F1F8F2;
  --color-text-dark: #1A2E1C;
  --color-text-light: #FFFFFF;
  --color-trust-green: #2E7D32;
  --color-border: #C8E6C9;
  --color-overlay: rgba(27, 94, 32, 0.7);

  /* Typography — Sharp, professional */
  --font-heading-jp: 'Noto Sans JP', sans-serif;
  --font-heading-en: 'Inter', sans-serif;
  --font-body: 'Inter', 'Noto Sans JP', sans-serif;

  /* Spacing — Generous Western-style whitespace */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3.5rem;
  --space-3xl: 5rem;
  --space-4xl: 8rem;

  /* Layout */
  --max-width: 1280px;
  --header-height: 72px;
  --border-radius: 8px;
  --border-radius-lg: 12px;

  /* Shadows — Softer, more diffused */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.1);
  --shadow-header: 0 1px 12px rgba(0, 0, 0, 0.08);

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
}

/* --- 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-body);
  color: var(--color-text-dark);
  background-color: var(--color-white);
  line-height: 1.7;
  font-size: 15px;
  font-weight: 400;
  overflow-x: hidden;
  letter-spacing: 0;
  -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 — Sharp, professional --- */
h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -0.025em;
}

[lang="ja"] h1,
[lang="ja"] h2,
[lang="ja"] h3,
.heading-jp {
  font-family: var(--font-heading-jp);
}

[lang="en"] h1,
[lang="en"] h2,
[lang="en"] h3,
.heading-en {
  font-family: var(--font-heading-en);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.4rem; }
h4 { font-size: 1.15rem; }

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

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

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

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

.section--gray {
  background-color: var(--color-light-gray);
}

.section--dark {
  background-color: var(--color-primary-dark);
  color: var(--color-text-light);
}

.section__title {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.section__title h2 {
  margin-bottom: var(--space-sm);
}

.section__title p {
  color: #475569;
  font-size: 1rem;
  font-weight: 400;
  letter-spacing: 0;
}

.section--dark .section__title p {
  color: #ccc;
}

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

/* --- 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;
}

/* Inline elements: span, a, strong, em */
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;
}

/* Headings */
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;
}

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

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

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

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

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

/* Divs (general) */
body.lang-ja div[data-lang-ja],
body.lang-en div[data-lang-en] {
  display: block !important;
}

/* Form error messages - keep as hidden until error */
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;
}

/* Hidden utility */
.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;
}