/* =========================================================
   就活AI — 共通スタイル
   設計トークンは CSS カスタムプロパティで管理（Front-End-Checklist:
   css-custom-properties / color-oklch / responsive-units /
   dark-mode-css / reduced-motion / focus-styles / touch-targets）
   ========================================================= */

/* ---------- modern reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body { -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
img, svg, picture { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: inherit; }

/* ---------- design tokens (light) ---------- */
:root {
  color-scheme: light dark;

  /* color — oklch で知覚均等なパレット（color-oklch） */
  --bg:        oklch(0.98 0.005 265);
  --surface:   oklch(1 0 0);
  --surface-2: oklch(0.97 0.006 265);
  --ink:       oklch(0.25 0.02 265);
  --ink-soft:  oklch(0.48 0.02 265);
  --ink-faint: oklch(0.62 0.015 265);
  --line:      oklch(0.91 0.01 265);
  --line-strong: oklch(0.84 0.015 265);

  --brand:      oklch(0.55 0.21 265);
  --brand-ink:  oklch(0.46 0.20 265);
  --brand-soft: oklch(0.96 0.03 265);
  --on-brand:   oklch(0.99 0 0);

  --accent:     oklch(0.70 0.17 45);
  --ok:         oklch(0.60 0.14 155);
  --warn:       oklch(0.70 0.15 75);

  --ring:       oklch(0.55 0.21 265);

  /* spacing scale */
  --sp-1: 0.25rem; --sp-2: 0.5rem; --sp-3: 0.75rem; --sp-4: 1rem;
  --sp-5: 1.5rem; --sp-6: 2rem; --sp-7: 3rem;

  --radius: 16px;
  --radius-sm: 10px;
  --radius-pill: 999px;

  --shadow-sm: 0 1px 2px oklch(0.25 0.02 265 / 0.06);
  --shadow:    0 8px 28px oklch(0.25 0.05 265 / 0.10);
  --shadow-lg: 0 18px 48px oklch(0.25 0.08 265 / 0.16);

  --font-jp: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic",
             "Meiryo", "Noto Sans JP", system-ui, -apple-system, sans-serif;

  --t-fast: 140ms; --t: 220ms;
  --ease: cubic-bezier(.2, .7, .2, 1);
}

/* ---------- base ---------- */
body {
  font-family: var(--font-jp);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.75;
  font-size: 1rem;            /* 16px 基準、ユーザー倍率に追従（font-size） */
}
a { text-decoration: none; color: var(--brand-ink); }
a:hover { text-decoration: underline; }
::selection { background: var(--brand-soft); color: var(--brand-ink); }

/* ---------- layout ---------- */
.wrap { max-width: 60rem; margin-inline: auto; padding-inline: 1.125rem; }

.nav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in oklab, var(--surface) 86%, transparent);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; gap: 0.875rem; min-height: 3.5rem; }
.brand { font-weight: 800; font-size: 1.125rem; letter-spacing: .01em; line-height: 1.1; }
.brand small { font-weight: 600; color: var(--ink-soft); font-size: 0.75rem; display: block; margin-top: 0.15rem; }
.nav-links { margin-left: auto; display: flex; gap: 0.25rem; flex-wrap: wrap; align-items: center; }
.nav-links a {
  font-size: 0.875rem; padding-inline: 0.625rem; border-radius: var(--radius-pill);
  color: var(--ink-soft); min-height: 2.75rem; display: inline-flex; align-items: center;   /* touch-targets ≥44px */
  transition: background var(--t) var(--ease), color var(--t) var(--ease);
}
.nav-links a:hover { background: var(--brand-soft); color: var(--brand-ink); text-decoration: none; }
.nav-links a.active { background: var(--brand); color: var(--on-brand); font-weight: 700; }

/* ---------- hero ---------- */
.hero {
  padding: 3rem 0 1.75rem; text-align: center;
  position: relative;
}
.hero::before {
  content: ""; position: absolute; inset: -2rem 0 auto 0; height: 14rem; z-index: -1;
  background: radial-gradient(60% 100% at 50% 0,
              color-mix(in oklab, var(--brand) 16%, transparent), transparent 70%);
}
.hero h1 { font-size: clamp(1.7rem, 5vw, 2.6rem); margin: 0 0 0.625rem; line-height: 1.25; letter-spacing: -0.01em; }
.hero .sub { color: var(--ink-soft); font-size: clamp(0.95rem, 2.4vw, 1.15rem); margin: 0 auto 1rem; max-width: 40rem; }
.badges { display: flex; gap: 0.5rem; justify-content: center; flex-wrap: wrap; margin-bottom: 1.125rem; }
.badge {
  font-size: 0.75rem; background: var(--brand-soft); color: var(--brand-ink);
  padding: 0.3rem 0.75rem; border-radius: var(--radius-pill); font-weight: 700;
}

/* ---------- cards / sections ---------- */
.card {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow-sm);
  padding: 1.25rem; margin: 1rem 0;
  transition: box-shadow var(--t) var(--ease), transform var(--t) var(--ease);
}
.card:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
.section { padding: 0.875rem 0; }
.section h2 { font-size: 1.375rem; margin: 0.5rem 0 0.75rem; letter-spacing: -0.01em; }
.section h3 { font-size: 1.0625rem; margin: 1.125rem 0 0.5rem; }
.muted { color: var(--ink-soft); }

/* ---------- form ---------- */
.field { margin: 0.75rem 0; }
.field label { display: block; font-weight: 700; font-size: 0.875rem; margin-bottom: 0.375rem; }
.field .hint { font-weight: 400; color: var(--ink-faint); font-size: 0.75rem; }
input[type=text], input[type=url], textarea, select {
  width: 100%; padding: 0.6875rem 0.75rem; border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm); background: var(--surface); color: var(--ink);
  transition: border-color var(--t) var(--ease), box-shadow var(--t) var(--ease);
}
textarea { min-height: 5.75rem; resize: vertical; }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }
@media (max-width: 35rem) { .row { grid-template-columns: 1fr; } }
.chips { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.chip {
  border: 1px solid var(--line-strong); background: var(--surface); border-radius: var(--radius-pill);
  padding: 0.5rem 0.875rem; cursor: pointer; font-size: 0.875rem;
  min-height: 2.75rem; display: inline-flex; align-items: center;   /* touch-targets */
  transition: background var(--t) var(--ease), border-color var(--t) var(--ease), color var(--t) var(--ease);
}
.chip:hover { border-color: var(--brand); }
.chip[aria-pressed=true] { background: var(--brand); color: var(--on-brand); border-color: var(--brand); font-weight: 700; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  border: 0; border-radius: var(--radius-sm); padding: 0.8125rem 1.25rem; font-weight: 800;
  cursor: pointer; background: var(--brand); color: var(--on-brand); box-shadow: var(--shadow-sm);
  min-height: 2.875rem;
  transition: background var(--t) var(--ease), transform var(--t) var(--ease), box-shadow var(--t) var(--ease), opacity var(--t) var(--ease);
}
.btn:hover { background: var(--brand-ink); transform: translateY(-1px); box-shadow: var(--shadow); }
.btn:active { transform: translateY(0); }
.btn:disabled { opacity: .55; cursor: progress; transform: none; }
.btn.block { width: 100%; }
.btn.ghost { background: var(--surface); color: var(--brand-ink); border: 1px solid var(--brand); box-shadow: none; }
.btn.ghost:hover { background: var(--brand-soft); }
.btn.mini { padding: 0.5rem 0.75rem; font-size: 0.8125rem; border-radius: var(--radius-sm); min-height: 2.5rem; }

/* ---------- result / editor ---------- */
.toolbar { display: flex; gap: 0.5rem; flex-wrap: wrap; margin: 0.625rem 0; }
.doc {
  border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--surface);
  padding: 1.375rem; min-height: 7.5rem; line-height: 1.9;
}
.doc:focus-visible { outline: 2px dashed var(--brand); outline-offset: 3px; }
.doc[contenteditable=true] { cursor: text; }
.doc.placeholder { color: var(--ink-faint); }
.placeholder-hint { color: var(--ink-faint); font-style: normal; }
.spinner {
  display: inline-block; width: 1rem; height: 1rem; border: 2px solid currentColor;
  border-top-color: transparent; border-radius: 50%; animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- resume / photo ---------- */
.resume-grid { display: grid; grid-template-columns: 1fr 7.5rem; gap: 1.125rem; align-items: start; }
@media (max-width: 35rem) { .resume-grid { grid-template-columns: 1fr; } }
.photo-slot {
  width: 7.5rem; height: 10rem; border: 2px dashed var(--line-strong); border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center; color: var(--ink-faint);
  font-size: 0.75rem; text-align: center; overflow: hidden; background: var(--surface-2);
}
.photo-slot img { width: 100%; height: 100%; object-fit: cover; }
.photo-drop { font-size: 0.75rem; }
.photo-drop input { display: none; }

/* ---------- guide / faq ---------- */
.guide-step { display: flex; gap: 0.75rem; margin: 0.625rem 0; }
.guide-step .n {
  flex: 0 0 1.75rem; height: 1.75rem; border-radius: 50%; background: var(--brand-soft);
  color: var(--brand-ink); font-weight: 800; display: flex; align-items: center; justify-content: center;
  font-size: 0.875rem;
}
.faq { border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); padding: 0.75rem 0; }
.faq summary { font-weight: 700; cursor: pointer; }
.faq p { margin: 0.5rem 0 0; color: var(--ink-soft); }

/* ---------- footer ---------- */
.footer { border-top: 1px solid var(--line); margin-top: 1.875rem; padding: 1.375rem 0; color: var(--ink-soft); font-size: 0.8125rem; }
.footer .wrap { display: flex; flex-wrap: wrap; gap: 0.875rem; justify-content: space-between; align-items: center; }
.footer nav { display: flex; gap: 0.875rem; flex-wrap: wrap; }

/* ---------- skip link (accessibility) ---------- */
.skip-link {
  position: absolute; left: 0.5rem; top: -3rem; z-index: 100;
  background: var(--brand); color: var(--on-brand); padding: 0.5rem 0.875rem;
  border-radius: var(--radius-sm); font-weight: 700; transition: top var(--t) var(--ease);
}
.skip-link:focus { top: 0.5rem; }

/* ---------- theme toggle ---------- */
.theme-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 2.75rem; height: 2.75rem; border-radius: var(--radius-pill);
  border: 1px solid var(--line-strong); background: var(--surface); color: var(--ink);
  cursor: pointer; margin-left: 0.25rem;
  transition: background var(--t) var(--ease), border-color var(--t) var(--ease);
}
.theme-toggle:hover { border-color: var(--brand); background: var(--brand-soft); }
.theme-toggle svg { width: 1.125rem; height: 1.125rem; }
:root, [data-theme="light"] { --ic-sun: none; --ic-moon: block; }
[data-theme="dark"] { --ic-sun: block; --ic-moon: none; }
.theme-toggle .ic-sun { display: var(--ic-sun); }
.theme-toggle .ic-moon { display: var(--ic-moon); }

/* ---------- focus-visible (WCAG 2.4.7 / 2.4.13) ---------- */
:focus-visible {
  outline: 3px solid var(--ring);
  outline-offset: 2px;
  border-radius: 4px;
}
.chip:focus-visible, .nav-links a:focus-visible, .btn:focus-visible, .theme-toggle:focus-visible {
  outline-offset: 3px;
}

/* ---------- dark mode ---------- */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg:        oklch(0.17 0.012 265);
    --surface:   oklch(0.21 0.014 265);
    --surface-2: oklch(0.25 0.014 265);
    --ink:       oklch(0.95 0.005 265);
    --ink-soft:  oklch(0.78 0.01 265);
    --ink-faint: oklch(0.66 0.01 265);
    --line:      oklch(0.32 0.012 265);
    --line-strong: oklch(0.42 0.014 265);
    --brand:      oklch(0.68 0.16 265);
    --brand-ink:  oklch(0.80 0.13 265);
    --brand-soft: oklch(0.30 0.06 265);
    --on-brand:   oklch(0.16 0.02 265);
    --ring:       oklch(0.75 0.15 265);
    --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.4);
    --shadow:    0 8px 28px oklch(0 0 0 / 0.5);
    --shadow-lg: 0 18px 48px oklch(0 0 0 / 0.6);
  }
}
[data-theme="dark"] {
  --bg:        oklch(0.17 0.012 265);
  --surface:   oklch(0.21 0.014 265);
  --surface-2: oklch(0.25 0.014 265);
  --ink:       oklch(0.95 0.005 265);
  --ink-soft:  oklch(0.78 0.01 265);
  --ink-faint: oklch(0.66 0.01 265);
  --line:      oklch(0.32 0.012 265);
  --line-strong: oklch(0.42 0.014 265);
  --brand:      oklch(0.68 0.16 265);
  --brand-ink:  oklch(0.80 0.13 265);
  --brand-soft: oklch(0.30 0.06 265);
  --on-brand:   oklch(0.16 0.02 265);
  --ring:       oklch(0.75 0.15 265);
  --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.4);
  --shadow:    0 8px 28px oklch(0 0 0 / 0.5);
  --shadow-lg: 0 18px 48px oklch(0 0 0 / 0.6);
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ============ PRINT / PDF ============ */
@media print {
  /* 印刷時は強制的にライトトークン（ダーク表示での白飛び防止） */
  :root, [data-theme="dark"] {
    --bg: #fff; --surface: #fff; --surface-2: #fff;
    --ink: #111; --ink-soft: #333; --ink-faint: #555;
    --line: #ccc; --line-strong: #aaa; --brand-soft: #eef2ff;
    --shadow-sm: none; --shadow: none; --shadow-lg: none;
  }
  @page { size: A4; margin: 14mm; }
  body { background: #fff; }
  .nav, .hero, .toolbar, .field, .badges, .footer, .no-print,
  .section.guide, .section.faq-sec, .skip-link, .theme-toggle { display: none !important; }
  .wrap { max-width: none; padding: 0; }
  .card { border: 0; box-shadow: none; padding: 0; margin: 0; }
  .doc, .resume-doc { border: 0; padding: 0; }
  .doc[contenteditable=true] { outline: none; }
  .card:hover { transform: none; box-shadow: none; }
}