/* 在タイ東京都民会 — site styles */

:root {
  /* Tokyo Metropolitan Government (metro.tokyo.lg.jp) palette
     — clean white bg, vivid Tokyo green, deep navy for depth */
  --green-900: #00793f;   /* deepest */
  --green-800: #00913f;   /* Tokyo-go (東京緑) — metro.tokyo.lg.jp primary */
  --green-700: #0ba33f;   /* vivid */
  --green-600: #2fbd57;   /* hover */
  --green-500: #6fd48e;
  --green-400: #a9e3bb;
  --green-50:  #e6f5ec;

  /* Metro.tokyo.lg.jp deep navy used in headers / dark sections */
  --navy-900: #0b1c3f;
  --navy-800: #13285a;

  --ink: #0c1a14;
  --ink-2: #1a2922;
  --ink-soft: #3a4a42;
  --muted: #6b7a72;
  --line: rgba(12, 26, 20, 0.12);
  --line-strong: rgba(12, 26, 20, 0.28);

  --paper: #fafaf7;
  --paper-warm: #f3efe6;
  --white: #ffffff;

  --accent: #e63946;   /* Tokyo red for accents (hinomaru-feel) */
  --accent-ink: #7a1118;
  --crimson: #e63946;

  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 18px;

  --shadow-sm: 0 1px 2px rgba(12,26,20,.06), 0 2px 6px rgba(12,26,20,.04);
  --shadow: 0 8px 24px rgba(12,26,20,.08), 0 2px 6px rgba(12,26,20,.05);
  --shadow-lg: 0 24px 60px rgba(12,26,20,.14), 0 6px 18px rgba(12,26,20,.08);

  --font-jp: "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --font-jp-sans: "Noto Sans JP", "Hiragino Sans", "Yu Gothic", system-ui, sans-serif;
  --font-th: "Noto Sans Thai", system-ui, sans-serif;
  --font-en: "Playfair Display", "Noto Serif JP", serif;
  --font-en-sans: "Inter", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-jp-sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-size: 16px;
  line-height: 1.65;
  overflow-x: hidden;
}
body[data-lang="th"] { font-family: var(--font-th), var(--font-jp-sans); }
body[data-lang="en"] { font-family: var(--font-en-sans); }

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

.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
}
@media (max-width: 720px) { .container { padding: 0 20px; } }

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-en-sans);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--green-700);
}
.kicker::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--green-700);
}

h1, h2, h3 { font-family: var(--font-jp); font-weight: 600; letter-spacing: -0.01em; line-height: 1.2; margin: 0; }
body[data-lang="en"] h1, body[data-lang="en"] h2, body[data-lang="en"] h3 { font-family: var(--font-en); letter-spacing: -0.015em; }
body[data-lang="th"] h1, body[data-lang="th"] h2, body[data-lang="th"] h3 { font-family: var(--font-th); font-weight: 700; }

.section {
  padding: 120px 0;
  position: relative;
}
@media (max-width: 720px) { .section { padding: 80px 0; } }

.section-head {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 56px;
  max-width: 780px;
}
.section-head h2 { font-size: clamp(28px, 4.2vw, 46px); }
.section-head .lead { color: var(--ink-soft); font-size: 17px; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.02em;
  transition: all 0.18s ease;
  white-space: nowrap;
  border: 1px solid transparent;
}
.btn-primary { background: var(--green-800); color: #fff; }
.btn-primary:hover { background: var(--green-900); transform: translateY(-1px); box-shadow: var(--shadow); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line-strong); }
.btn-ghost:hover { background: var(--ink); color: #fff; border-color: var(--ink); }
.btn-accent { background: var(--accent); color: var(--accent-ink); }
.btn-accent:hover { background: #b99238; transform: translateY(-1px); }
.btn-ghost-dark { background: transparent; color: #fff; border-color: rgba(255,255,255,0.22); }
.btn-ghost-dark:hover { background: rgba(255,255,255,0.08); border-color: rgba(255,255,255,0.4); color: #fff; }
.btn-lg { padding: 16px 28px; font-size: 15px; }

.btn .arrow {
  display: inline-block;
  transition: transform .2s ease;
}
.btn:hover .arrow { transform: translateX(3px); }