/* =========================================================
   畔蒜ジョージの資産運用入門講座 — Design System
   White base / vivid accents / modern gothic
   ========================================================= */

:root {
  /* Core palette */
  --ink: #1c1714;          /* warm near-black text */
  --ink-soft: #5c5048;     /* muted body */
  --paper: #fffdf8;        /* warm white base */
  --paper-2: #fff7ea;      /* soft cream panel */
  --line: #ece3d6;         /* hairline */

  /* Vivid accents */
  --tangerine: #ff5630;    /* primary energy / CTA "今すぐ始めろ" */
  --tangerine-ink: #d83a1a;
  --green: #00b574;        /* growth / money up */
  --green-ink: #00935f;
  --gold: #f5b300;         /* gold / amber */
  --blue: #2f7df0;         /* trust / info */
  --blue-ink: #1f63cb;
  --grape: #7a5cff;        /* secondary pop */

  /* Tints */
  --tan-tint: #fff0eb;
  --green-tint: #e6f8f1;
  --gold-tint: #fff5d9;
  --blue-tint: #eaf2fe;
  --grape-tint: #f0ecff;

  --shadow-sm: 0 2px 8px rgba(28,23,20,.06);
  --shadow-md: 0 12px 32px rgba(28,23,20,.10);
  --shadow-lg: 0 30px 70px rgba(28,23,20,.16);

  --r-sm: 12px;
  --r-md: 20px;
  --r-lg: 32px;
  --r-pill: 999px;

  --maxw: 1120px;

  --font-jp: "Zen Kaku Gothic New", system-ui, sans-serif;
  --font-num: "Outfit", "Zen Kaku Gothic New", sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-jp);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.8;
  font-weight: 500;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a { color: inherit; }

h1, h2, h3, h4 { line-height: 1.3; margin: 0; font-weight: 900; letter-spacing: .01em; }

.num { font-family: var(--font-num); font-feature-settings: "tnum" 1; }

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 700; letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--tangerine-ink);
  font-family: var(--font-num);
}
.eyebrow::before {
  content: ""; width: 22px; height: 3px; border-radius: 2px;
  background: var(--tangerine);
}

/* =================== NAV =================== */
.nav {
  position: sticky; top: 0; z-index: 60;
  background: rgba(255,253,248,.82);
  backdrop-filter: saturate(140%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 14px 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.brand { display: flex; align-items: center; gap: 11px; text-decoration: none; color: var(--ink); }
.brand-mark {
  width: 40px; height: 40px; border-radius: 11px; flex: none;
  background: var(--ink); color: var(--paper);
  display: grid; place-items: center;
  font-family: var(--font-num); font-weight: 800; font-size: 20px;
  transform: rotate(-4deg);
  box-shadow: var(--shadow-sm);
}
.brand-mark span { transform: rotate(4deg); }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text b { font-size: 15px; font-weight: 900; letter-spacing: .02em; }
.brand-text small { font-size: 11px; color: var(--ink-soft); font-weight: 600; letter-spacing: .04em; }

.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
  text-decoration: none; font-size: 14px; font-weight: 700; color: var(--ink-soft);
  padding: 9px 14px; border-radius: var(--r-pill); transition: .18s;
}
.nav-links a:hover { color: var(--ink); background: var(--paper-2); }
.nav-links a.active { color: var(--ink); background: var(--paper-2); }
.nav-cta {
  background: var(--tangerine) !important; color: #fff !important;
  box-shadow: 0 6px 16px rgba(255,86,48,.32);
}
.nav-cta:hover { background: var(--tangerine-ink) !important; }

.nav-toggle { display: none; }

/* =================== BUTTONS =================== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  font-family: var(--font-jp); font-weight: 800; font-size: 16px;
  padding: 16px 28px; border-radius: var(--r-pill);
  text-decoration: none; cursor: pointer; border: none;
  transition: transform .15s, box-shadow .15s, background .18s;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--tangerine); color: #fff; box-shadow: 0 10px 24px rgba(255,86,48,.34); }
.btn-primary:hover { background: var(--tangerine-ink); transform: translateY(-2px); box-shadow: 0 16px 34px rgba(255,86,48,.40); }
.btn-ink { background: var(--ink); color: var(--paper); }
.btn-ink:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn-ghost { background: #fff; color: var(--ink); box-shadow: inset 0 0 0 2px var(--line); }
.btn-ghost:hover { box-shadow: inset 0 0 0 2px var(--ink); transform: translateY(-2px); }
.btn-lg { font-size: 18px; padding: 19px 38px; }

/* =================== SECTION HELPERS =================== */
section { position: relative; }
.section-pad { padding: 88px 0; }
.section-head { max-width: 720px; }
.section-head h2 {
  font-size: clamp(28px, 4.4vw, 46px); margin: 14px 0 0;
  letter-spacing: .005em;
}
.section-head p { color: var(--ink-soft); font-size: 17px; margin: 18px 0 0; }

.kicker-num {
  font-family: var(--font-num); font-weight: 800; font-size: 14px;
  color: var(--tangerine-ink); letter-spacing: .1em;
}

/* =================== CARDS =================== */
.card {
  background: #fff; border-radius: var(--r-lg); padding: 32px;
  box-shadow: var(--shadow-sm); border: 1px solid var(--line);
}

/* highlight marker */
.mark { background: linear-gradient(transparent 58%, var(--gold) 58% 92%, transparent 92%); padding: 0 2px; }
.mark-green { background: linear-gradient(transparent 58%, #aef0d6 58% 92%, transparent 92%); padding: 0 2px; }
.mark-tan { background: linear-gradient(transparent 58%, #ffd0c2 58% 92%, transparent 92%); padding: 0 2px; }

.tagpill {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 13px; font-weight: 800; padding: 7px 14px; border-radius: var(--r-pill);
}

/* =================== FOOTER =================== */
.footer {
  background: var(--ink); color: #d8cfc6; padding: 64px 0 40px; margin-top: 40px;
}
.footer .wrap { display: grid; gap: 36px; }
.footer-top { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 32px; align-items: flex-start; }
.footer-brand { max-width: 360px; }
.footer-brand .brand-text b { color: #fff; }
.footer-brand p { color: #a89c91; font-size: 14px; margin: 16px 0 0; }
.footer-nav { display: flex; gap: 56px; flex-wrap: wrap; }
.footer-col h5 { color: #fff; font-size: 13px; letter-spacing: .1em; margin: 0 0 14px; font-family: var(--font-num); text-transform: uppercase; }
.footer-col a { display: block; text-decoration: none; color: #a89c91; font-size: 14px; padding: 5px 0; font-weight: 600; }
.footer-col a:hover { color: #fff; }
.footer-fine { border-top: 1px solid rgba(255,255,255,.1); padding-top: 24px; font-size: 12px; color: #877b70; line-height: 1.7; }

/* disclaimer ribbon */
.disclaimer {
  background: var(--paper-2); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
  font-size: 13px; color: var(--ink-soft); padding: 14px 0;
}
.disclaimer .wrap { display: flex; gap: 12px; align-items: flex-start; }
.disclaimer b { color: var(--ink); }

/* reveal on scroll */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s cubic-bezier(.2,.7,.2,1), transform .7s cubic-bezier(.2,.7,.2,1); }
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* =================== RESPONSIVE =================== */
@media (max-width: 820px) {
  .section-pad { padding: 60px 0; }
  .nav-links { gap: 2px; }
  .nav-links a:not(.nav-cta) { display: none; }
  .card { padding: 24px; }
}