/* ===========================================================
   Fang — 哲學及靈性研習  |  shared stylesheet
   =========================================================== */

:root {
  /* palette */
  --color-bg: #f7f5f0;
  --color-surface: #ffffff;
  --color-ink: #1d1b29;
  --color-ink-soft: #4a4760;
  --color-primary: #3a3a6e;       /* deep indigo */
  --color-primary-dark: #26264a;
  --color-accent: #c79a4b;        /* warm gold */
  --color-accent-soft: #e7d4a8;
  --color-line: #e4e0d6;

  /* type */
  --font-serif: "Noto Serif TC", "Songti TC", Georgia, serif;
  --font-sans: "Noto Sans TC", "PingFang TC", "Helvetica Neue", Arial, sans-serif;

  /* layout */
  --maxw: 1140px;
  --gutter: clamp(1.2rem, 4vw, 3rem);
  --radius: 14px;
  --shadow: 0 14px 40px rgba(38, 38, 74, 0.10);
  --transition: 0.25s ease;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-ink);
  background: var(--color-bg);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  line-height: 1.3;
  color: var(--color-primary-dark);
  font-weight: 600;
  margin: 0 0 .6em;
}

h1 { font-size: clamp(2rem, 5vw, 3.2rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); }
h3 { font-size: clamp(1.2rem, 2.2vw, 1.5rem); }

p { margin: 0 0 1.1em; color: var(--color-ink-soft); }

a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-accent); }

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

/* ---------- layout helpers ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(3.5rem, 8vw, 6rem); }
.section--tint { background: var(--color-surface); }

.section-head { max-width: 720px; margin: 0 auto clamp(2rem, 5vw, 3rem); text-align: center; }
.eyebrow {
  display: inline-block;
  font-size: .8rem;
  letter-spacing: .28em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: .8rem;
  font-weight: 600;
}
.section-head p { font-size: 1.05rem; }

/* ---------- buttons ---------- */
.btn {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  padding: .7em 1.6em;
  border-radius: 999px;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
}
.btn--primary { background: var(--color-primary); color: #fff; }
.btn--primary:hover { background: var(--color-accent); color: #fff; transform: translateY(-2px); }
.btn--ghost { border-color: var(--color-primary); color: var(--color-primary); }
.btn--ghost:hover { background: var(--color-primary); color: #fff; }
.btn-row { display: flex; flex-wrap: wrap; gap: 1rem; }

/* ---------- header / nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(247, 245, 240, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-line);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 70px;
}
.brand { display: flex; align-items: center; gap: .6rem; font-family: var(--font-serif); }
.brand__mark {
  width: 38px; height: 38px; border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, var(--color-accent), var(--color-primary));
  display: grid; place-items: center; color: #fff; font-weight: 700; font-size: 1.1rem;
}
.brand__name { font-size: 1.4rem; font-weight: 600; color: var(--color-primary-dark); }
.brand__name small { display: block; font-size: .62rem; letter-spacing: .25em; color: var(--color-accent); font-family: var(--font-sans); }

.nav-links { display: flex; align-items: center; gap: clamp(1rem, 2.5vw, 2rem); list-style: none; margin: 0; padding: 0; }
.nav-links a { font-weight: 500; color: var(--color-ink); }
.nav-links a:hover, .nav-links a.active { color: var(--color-accent); }

.nav-toggle {
  display: none; background: none; border: 0; cursor: pointer;
  width: 44px; height: 44px; flex-direction: column; justify-content: center; gap: 5px;
}
.nav-toggle span { display: block; height: 2px; background: var(--color-primary-dark); transition: var(--transition); }

@media (max-width: 820px) {
  .nav-toggle { display: flex; }
  .nav-links {
    position: absolute; inset: 70px 0 auto 0;
    flex-direction: column; align-items: flex-start;
    gap: 0; background: var(--color-surface);
    border-bottom: 1px solid var(--color-line);
    padding: .5rem var(--gutter) 1.2rem;
    box-shadow: var(--shadow);
    transform: translateY(-120%); opacity: 0; pointer-events: none; transition: var(--transition);
  }
  .nav-links.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-links li { width: 100%; border-bottom: 1px solid var(--color-line); }
  .nav-links a { display: block; padding: .9rem 0; }
}

/* ---------- hero ---------- */
.hero {
  position: relative;
  color: #fff;
  background: linear-gradient(rgba(26,26,46,.62), rgba(26,26,46,.72)), var(--hero-img, none) center/cover no-repeat;
  background-color: var(--color-primary-dark);
}
.hero__inner { padding-block: clamp(5rem, 14vw, 9rem); max-width: 760px; }
.hero h1 { color: #fff; }
.hero p { color: rgba(255,255,255,.9); font-size: 1.15rem; max-width: 60ch; }
.hero .eyebrow { color: var(--color-accent-soft); }
.hero--page .hero__inner { padding-block: clamp(3.5rem, 9vw, 5.5rem); }

/* ---------- cards / grids ---------- */
.grid { display: grid; gap: clamp(1.2rem, 3vw, 2rem); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 2rem;
  transition: transform var(--transition), box-shadow var(--transition);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.card__icon {
  width: 52px; height: 52px; border-radius: 12px; margin-bottom: 1.1rem;
  display: grid; place-items: center; font-size: 1.5rem;
  background: var(--color-accent-soft); color: var(--color-primary-dark);
}
.card h3 { margin-bottom: .4em; }
.card p { margin-bottom: 0; }

/* media + text split */
.split { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: clamp(1.5rem, 5vw, 3.5rem); align-items: center; }
.split__media img { border-radius: var(--radius); box-shadow: var(--shadow); width: 100%; height: 100%; object-fit: cover; }

/* course list */
.course { display: flex; flex-wrap: wrap; gap: 1rem 1.5rem; align-items: baseline; justify-content: space-between;
  background: var(--color-surface); border: 1px solid var(--color-line); border-left: 4px solid var(--color-accent);
  border-radius: var(--radius); padding: 1.6rem 1.8rem; }
.course h3 { margin: 0 0 .2em; }
.course .meta { font-size: .9rem; color: var(--color-accent); font-weight: 600; }
.course p { margin: 0; flex-basis: 100%; }

/* quote (supports <div class="quote"><blockquote> and <blockquote class="quote">) */
.quote { text-align: center; max-width: 760px; margin-inline: auto; }
.quote blockquote,
blockquote.quote {
  font-family: var(--font-serif);
  font-size: clamp(1.3rem, 3vw, 1.8rem);
  color: var(--color-primary-dark);
  margin: 0 0 1rem; line-height: 1.6;
}
.quote cite,
.quote footer,
blockquote.quote footer { color: var(--color-accent); font-style: normal; font-weight: 600; font-size: 1rem; font-family: var(--font-sans); }
.quote-intro { max-width: 640px; margin-inline: auto; font-size: 1.02rem; }

/* card subtitle (teacher specialties etc.) */
.card__subtitle { color: var(--color-accent); font-weight: 600; font-size: .9rem; margin-bottom: .6em; }

/* steps */
.steps { counter-reset: step; }
.step { position: relative; padding-left: 3.4rem; }
.step::before {
  counter-increment: step; content: counter(step);
  position: absolute; left: 0; top: 0;
  width: 2.4rem; height: 2.4rem; border-radius: 50%;
  background: var(--color-primary); color: #fff; font-weight: 700;
  display: grid; place-items: center; font-family: var(--font-serif);
}

/* ---------- contact / form ---------- */
.form { display: grid; gap: 1.1rem; max-width: 560px; }
.form label { font-weight: 600; color: var(--color-ink); font-size: .92rem; display: grid; gap: .4rem; }
.form input, .form textarea, .form select {
  font: inherit; padding: .75em .9em; border: 1.5px solid var(--color-line);
  border-radius: 10px; background: var(--color-surface); color: var(--color-ink); width: 100%;
}
.form input:focus, .form textarea:focus, .form select:focus { outline: none; border-color: var(--color-primary); }
.info-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 1.2rem; }
.info-list strong { display: block; color: var(--color-primary-dark); font-family: var(--font-serif); }

/* ---------- CTA band ---------- */
.cta-band { background: var(--color-primary-dark); color: #fff; text-align: center; }
.cta-band h2 { color: #fff; }
.cta-band p { color: rgba(255,255,255,.85); max-width: 56ch; margin-inline: auto; }

/* ---------- footer ---------- */
.site-footer { background: var(--color-primary-dark); color: rgba(255,255,255,.75); padding-block: 3rem 1.5rem; }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 2rem; margin-bottom: 2rem; }
.site-footer h4 { color: #fff; font-size: 1.05rem; }
.site-footer .brand__name { color: #fff; }
.site-footer a { color: rgba(255,255,255,.75); }
.site-footer a:hover { color: var(--color-accent-soft); }
.footer-links { list-style: none; padding: 0; margin: 0; display: grid; gap: .5rem; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.15); padding-top: 1.5rem; text-align: center; font-size: .85rem; }

/* ---------- utilities ---------- */
.text-center { text-align: center; }
.mt-2 { margin-top: 1.5rem; }
.lead { font-size: 1.15rem; }