/* Butterfly Investments · Base & Component Styles
   Depends on tokens.css. Load tokens first, then this file. */

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  background: var(--ivory);
  color: var(--navy);
  font-family: var(--font-body);
  font-weight: 300;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── NAV ── */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--navy);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-xl);
  height: 56px;
}
.nav-brand {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 300;
  color: var(--gold-pale);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
}
.nav-links {
  display: flex;
  gap: var(--space-lg);
  list-style: none;
}
.nav-links a {
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--stone);
  text-decoration: none;
  transition: color 0.2s;
}
.nav-links a:hover,
.nav-links a.active { color: var(--gold-pale); }

/* ── SECTIONS ── */
section { padding: var(--space-2xl) var(--space-xl); }
section.on-white { background: var(--white); }
section.on-navy-deep { background: var(--navy-deep); }
section.on-obsidian { background: var(--obsidian); }

/* Last section before footer fills remaining viewport height so its
   background extends to the footer on short pages. */
body > section:last-of-type { flex: 1 0 auto; }
body > .hero:last-of-type { flex: 1 0 auto; }

.section-label {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: var(--space-md);
}
.section-title {
  font-family: var(--font-display);
  font-size: clamp(32px, 4vw, 52px);
  font-weight: 300;
  line-height: 1.15;
  color: var(--navy);
  margin-bottom: var(--space-lg);
}
.section-body {
  font-size: clamp(15px, 0.5vw + 9px, 19px);
  font-weight: 300;
  color: var(--ash);
  max-width: 620px;
  line-height: 1.8;
}

/* ── HERO (index page) ── */
.hero {
  background: var(--navy-deep);
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 0;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 80% at 70% 50%, rgba(150,122,58,0.08) 0%, transparent 70%),
    radial-gradient(ellipse 40% 60% at 20% 80%, rgba(27,43,60,0.6) 0%, transparent 60%);
}
.hero-left { padding: var(--space-2xl) var(--space-xl); position: relative; z-index: 2; }
.hero-kanji {
  font-family: var(--font-chinese);
  font-size: 120px;
  color: rgba(150,122,58,0.15);
  line-height: 1;
  margin-bottom: var(--space-lg);
  letter-spacing: -0.02em;
}
.hero-title {
  font-family: var(--font-display);
  font-size: clamp(42px, 5vw, 72px);
  font-weight: 300;
  color: var(--white);
  line-height: 1.1;
  margin-bottom: var(--space-md);
}
.hero-title em { font-style: italic; color: var(--gold-pale); }
.hero-sub {
  font-size: 13px;
  font-weight: 300;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--stone);
  margin-bottom: var(--space-xl);
}
.hero-divider { width: 48px; height: 1px; background: var(--gold); margin-bottom: var(--space-xl); }
.hero-desc { font-size: clamp(15px, 0.5vw + 9px, 19px); font-weight: 300; color: var(--stone); max-width: 480px; line-height: 1.8; }
.hero-right {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 2;
  padding: var(--space-2xl);
}
.hero-logo-wrap {
  width: 340px;
  height: 340px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.hero-logo-wrap::before {
  content: '';
  position: absolute;
  inset: -2px;
  border: 1px solid rgba(150,122,58,0.2);
  border-radius: 2px;
}
.hero-logo-wrap img { width: 280px; height: 280px; object-fit: contain; }

/* ── PHILOSOPHY ── */
.philosophy-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  margin-top: var(--space-xl);
}
.philosophy-card { border-top: 1px solid var(--ivory-warm); padding-top: var(--space-lg); }
.philosophy-card.dark { background: var(--navy); padding: var(--space-xl); border-top: none; }
.philo-kanji { font-family: var(--font-chinese); font-size: 64px; color: var(--gold); line-height: 1; margin-bottom: var(--space-md); }
.philo-pinyin { font-size: 11px; letter-spacing: 0.2em; text-transform: uppercase; color: var(--ash); margin-bottom: var(--space-sm); }
.philo-meaning {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 300;
  color: var(--navy);
  margin-bottom: var(--space-md);
}
.philosophy-card.dark .philo-meaning { color: var(--ivory); }
.philo-desc { font-size: 14px; color: var(--ash); line-height: 1.8; }
.philosophy-card.dark .philo-desc { color: var(--stone); }

/* ── COLORS ── */
.color-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: var(--space-md);
  margin-top: var(--space-xl);
}
.swatch { border-radius: 2px; overflow: hidden; box-shadow: 0 2px 12px rgba(0,0,0,0.06); }
.swatch-color { height: 100px; width: 100%; }
.swatch-info { padding: 12px var(--space-md); background: var(--white); border: 1px solid var(--ivory-warm); border-top: none; }
.swatch-name { font-size: 12px; font-weight: 500; color: var(--navy); margin-bottom: 2px; letter-spacing: 0.04em; }
.swatch-hex { font-size: 11px; color: var(--ash); font-family: 'Courier New', monospace; }
.swatch-role { font-size: 10px; color: var(--stone); margin-top: 4px; text-transform: uppercase; letter-spacing: 0.1em; }
.color-section-title {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ash);
  margin: var(--space-xl) 0 var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--ivory-warm);
}

/* ── TYPOGRAPHY ── */
.type-specimen { margin-top: var(--space-xl); display: flex; flex-direction: column; gap: var(--space-xl); }
.type-row {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: var(--space-xl);
  align-items: start;
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--ivory-warm);
}
.type-meta { padding-top: 6px; }
.type-meta-label { font-size: 10px; letter-spacing: 0.2em; text-transform: uppercase; color: var(--gold); margin-bottom: 6px; }
.type-meta-name { font-size: 13px; font-weight: 500; color: var(--navy); margin-bottom: 4px; }
.type-meta-detail { font-size: 12px; color: var(--ash); line-height: 1.7; }
.type-display-1 { font-family: var(--font-display); font-size: 64px; font-weight: 300; line-height: 1.1; color: var(--navy); }
.type-display-2 { font-family: var(--font-display); font-size: 48px; font-weight: 300; line-height: 1.15; color: var(--navy); }
.type-display-italic { font-family: var(--font-display); font-size: 48px; font-style: italic; font-weight: 300; color: var(--gold); }
.type-heading-1 { font-family: var(--font-body); font-size: 24px; font-weight: 500; letter-spacing: -0.01em; color: var(--navy); }
.type-heading-2 { font-family: var(--font-body); font-size: 18px; font-weight: 500; color: var(--navy); }
.type-body { font-family: var(--font-body); font-size: 15px; font-weight: 300; line-height: 1.8; color: var(--navy); }
.type-caption { font-family: var(--font-body); font-size: 12px; font-weight: 300; color: var(--ash); line-height: 1.6; }
.type-label { font-family: var(--font-body); font-size: 10px; font-weight: 500; letter-spacing: 0.2em; text-transform: uppercase; color: var(--ash); }
.type-chinese-lg { font-family: var(--font-chinese); font-size: 48px; color: var(--navy); }
.type-chinese-sm { font-family: var(--font-chinese); font-size: 24px; color: var(--gold); }

/* ── LOGOS ── */
.logo-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-lg); margin-top: var(--space-xl); }
.logo-card {
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 220px;
  position: relative;
  gap: var(--space-lg);
  border: 1px solid var(--ivory-warm);
}
.logo-card.dark { background: var(--navy); border-color: var(--navy-mid); }
.logo-card.gold-bg { background: var(--gold); border-color: var(--gold); }
.logo-card-label {
  position: absolute;
  bottom: 12px;
  left: 16px;
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ash);
}
.logo-card.dark .logo-card-label { color: var(--stone); }
.logo-card.gold-bg .logo-card-label { color: rgba(255,255,255,0.6); }
.logo-lockup { display: flex; align-items: center; gap: 16px; }
.logo-lockup img { width: 52px; height: 52px; object-fit: contain; }
.logo-text-stack { display: flex; flex-direction: column; gap: 2px; }
.logo-primary {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 300;
  letter-spacing: 0.06em;
  color: var(--navy);
  line-height: 1;
}
.logo-card.dark .logo-primary { color: var(--white); }
.logo-card.gold-bg .logo-primary { color: var(--white); }
.logo-secondary {
  font-family: var(--font-body);
  font-size: 9px;
  font-weight: 400;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--gold);
}
.logo-card.dark .logo-secondary { color: var(--gold-pale); }
.logo-card.gold-bg .logo-secondary { color: rgba(255,255,255,0.75); }

/* Sub-brand lockup */
.subbrand-lockup { display: flex; align-items: center; gap: 10px; }
.subbrand-monogram {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 300;
  font-style: italic;
  letter-spacing: 0.05em;
  color: var(--gold);
  border-right: 1px solid var(--gold);
  padding-right: 14px;
  line-height: 1;
  min-width: 52px;
  text-align: center;
}
.subbrand-kanji {
  font-family: var(--font-chinese);
  font-size: 38px;
  line-height: 1;
  color: var(--gold);
  border-right: 1px solid var(--gold);
  padding-right: 12px;
}
.logo-card.dark .subbrand-kanji { color: var(--gold-pale); border-color: var(--gold-pale); }
.logo-card.gold-bg .subbrand-kanji { color: var(--white); border-color: rgba(255,255,255,0.5); }
.subbrand-text { display: flex; flex-direction: column; gap: 2px; }
.subbrand-primary {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 300;
  letter-spacing: 0.08em;
  color: var(--navy);
  line-height: 1;
}
.logo-card.dark .subbrand-primary { color: var(--white); }
.logo-card.gold-bg .subbrand-primary { color: var(--white); }
.subbrand-secondary { font-size: 9px; font-weight: 500; letter-spacing: 0.26em; text-transform: uppercase; color: var(--ash); }
.logo-card.dark .subbrand-secondary { color: var(--stone); }
.logo-card.gold-bg .subbrand-secondary { color: rgba(255,255,255,0.65); }

/* ── SPACING ── */
.spacing-row { display: flex; align-items: center; gap: var(--space-lg); margin-top: var(--space-md); }
.spacing-block { background: var(--gold); opacity: 0.7; flex-shrink: 0; }
.spacing-meta { font-size: 12px; color: var(--ash); }
.spacing-meta strong { color: var(--navy); }

/* ── COMPONENTS ── */
.comp-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-lg); margin-top: var(--space-xl); }
.comp-section { display: flex; flex-direction: column; gap: var(--space-md); }
.comp-label {
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--ivory-warm);
}

/* Buttons */
.btn-primary {
  display: inline-flex; align-items: center; gap: 10px;
  background: var(--navy); color: var(--white);
  font-family: var(--font-body); font-size: 11px; font-weight: 500;
  letter-spacing: 0.18em; text-transform: uppercase;
  padding: 14px 28px; border: none; cursor: pointer; transition: background 0.2s;
}
.btn-primary:hover { background: var(--navy-mid); }
.btn-secondary {
  display: inline-flex; align-items: center; gap: 10px;
  background: transparent; color: var(--navy);
  font-family: var(--font-body); font-size: 11px; font-weight: 500;
  letter-spacing: 0.18em; text-transform: uppercase;
  padding: 13px 27px; border: 1px solid var(--navy); cursor: pointer; transition: all 0.2s;
}
.btn-secondary:hover { background: var(--navy); color: var(--white); }
.btn-gold {
  display: inline-flex; align-items: center; gap: 10px;
  background: var(--gold); color: var(--white);
  font-family: var(--font-body); font-size: 11px; font-weight: 500;
  letter-spacing: 0.18em; text-transform: uppercase;
  padding: 14px 28px; border: none; cursor: pointer; transition: background 0.2s;
}
.btn-ghost {
  display: inline-flex; align-items: center; gap: 10px;
  background: transparent; color: var(--gold);
  font-family: var(--font-body); font-size: 11px; font-weight: 500;
  letter-spacing: 0.18em; text-transform: uppercase;
  padding: 13px 27px; border: 1px solid var(--gold); cursor: pointer;
}

/* Cards */
.card-navy { background: var(--navy); padding: var(--space-xl); color: var(--white); }
.card-navy .card-tag { font-size: 10px; letter-spacing: 0.2em; text-transform: uppercase; color: var(--gold-pale); margin-bottom: var(--space-md); }
.card-navy .card-title { font-family: var(--font-display); font-size: 26px; font-weight: 300; color: var(--white); margin-bottom: var(--space-md); line-height: 1.2; }
.card-navy .card-body { font-size: 13px; font-weight: 300; color: var(--stone); line-height: 1.7; }

.card-ivory { background: var(--ivory); padding: var(--space-xl); border: 1px solid var(--ivory-warm); }
.card-ivory .card-tag { font-size: 10px; letter-spacing: 0.2em; text-transform: uppercase; color: var(--gold); margin-bottom: var(--space-md); }
.card-ivory .card-title { font-family: var(--font-display); font-size: 26px; font-weight: 300; color: var(--navy); margin-bottom: var(--space-md); line-height: 1.2; }
.card-ivory .card-body { font-size: 13px; font-weight: 300; color: var(--ash); line-height: 1.7; }

/* Stat */
.stat-row {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px;
  background: var(--ivory-warm); border: 1px solid var(--ivory-warm); margin-top: var(--space-md);
}
.stat-item { background: var(--white); padding: var(--space-lg); }
.stat-number {
  font-family: var(--font-display);
  font-size: 42px; font-weight: 300; color: var(--navy);
  line-height: 1; margin-bottom: 4px;
}
.stat-number em { font-style: italic; color: var(--gold); }
.stat-label { font-size: 11px; font-weight: 300; letter-spacing: 0.1em; color: var(--ash); text-transform: uppercase; }

/* ── LETTERHEAD ── */
.letterhead-preview {
  background: var(--white);
  max-width: 680px;
  margin: var(--space-xl) auto 0;
  box-shadow: 0 8px 40px rgba(0,0,0,0.1);
  position: relative;
  overflow: hidden;
}
.lh-header {
  background: var(--navy);
  padding: var(--space-lg) var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.lh-header-left { display: flex; align-items: center; gap: 14px; }
.lh-logo { width: 36px; height: 36px; object-fit: contain; }
.lh-brand-name {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 300;
  color: var(--white);
  letter-spacing: 0.06em;
}
.lh-brand-sub {
  font-size: 8px;
  font-weight: 500;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--gold-pale);
  margin-top: 2px;
}
.lh-gold-bar { height: 3px; background: linear-gradient(90deg, var(--gold), var(--gold-pale)); }
.lh-body { padding: var(--space-xl); }
.lh-date { font-size: 12px; color: var(--ash); margin-bottom: var(--space-xl); }
.lh-recipient { margin-bottom: var(--space-xl); }
.lh-recipient p { font-size: 14px; font-weight: 300; color: var(--navy); line-height: 1.7; }
.lh-salutation { font-size: 14px; margin-bottom: var(--space-md); }
.lh-content { font-size: 13px; font-weight: 300; color: var(--navy); line-height: 1.9; margin-bottom: var(--space-lg); }
.lh-sig { margin-top: var(--space-xl); }
.lh-sig-name { font-family: var(--font-display); font-size: 20px; font-style: italic; color: var(--navy); margin-bottom: 4px; }
.lh-sig-title { font-size: 11px; letter-spacing: 0.12em; color: var(--ash); text-transform: uppercase; }
.lh-footer {
  background: var(--ivory);
  padding: var(--space-md) var(--space-xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--ivory-warm);
}
.lh-footer-text { font-size: 10px; color: var(--ash); letter-spacing: 0.08em; }
.lh-footer-kanji { font-family: var(--font-chinese); font-size: 16px; color: var(--gold); opacity: 0.5; }

/* ── CHARACTER SYSTEM ── */
.chinese-system {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}
.char-card {
  padding: var(--space-xl);
  background: var(--white);
  border: 1px solid var(--ivory-warm);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
}
.char-big { font-family: var(--font-chinese); font-size: 80px; line-height: 1; color: var(--navy); }
.char-pinyin { font-size: 12px; letter-spacing: 0.2em; color: var(--ash); text-transform: uppercase; }
.char-meaning { font-family: var(--font-display); font-size: 18px; font-weight: 300; color: var(--gold); }
.char-desc { font-size: 12px; color: var(--ash); line-height: 1.7; }

/* ── RULE CARDS ── */
.rule-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-lg); margin-top: var(--space-xl); }
.rule-card { padding: var(--space-lg); border-left: 3px solid; }
.rule-card.do { border-color: var(--gold); background: rgba(150,122,58,0.04); }
.rule-card.dont { border-color: #C0392B; background: rgba(192,57,43,0.04); }
.rule-tag { font-size: 9px; font-weight: 600; letter-spacing: 0.22em; text-transform: uppercase; margin-bottom: var(--space-sm); }
.rule-card.do .rule-tag { color: var(--gold); }
.rule-card.dont .rule-tag { color: #C0392B; }
.rule-text { font-size: 13px; font-weight: 300; color: var(--navy); line-height: 1.7; }

/* ── VOICE ── */
.voice-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-lg); margin-top: var(--space-xl); }
.voice-card { border-top: 2px solid var(--gold); padding-top: var(--space-lg); }
.voice-title { font-family: var(--font-display); font-size: 22px; font-weight: 300; color: var(--navy); margin-bottom: var(--space-sm); }
.voice-sub { font-size: 11px; color: var(--ash); margin-bottom: var(--space-md); font-style: italic; }
.voice-example {
  font-size: 13px;
  color: var(--navy);
  line-height: 1.7;
  font-weight: 300;
  padding-left: var(--space-md);
  border-left: 1px solid var(--ivory-warm);
}

/* ── FOOTER ── */
footer {
  background: var(--obsidian);
  padding: var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  flex-shrink: 0;
}
.footer-brand {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 300;
  color: var(--stone);
  letter-spacing: 0.1em;
}
.footer-kanji { font-family: var(--font-chinese); font-size: 24px; color: var(--gold); opacity: 0.6; }
.footer-version { font-size: 10px; color: var(--ash); letter-spacing: 0.16em; }

/* ── RESPONSIVE ── */
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; }
  .hero-right { display: none; }
  .philosophy-grid, .logo-grid, .comp-grid, .rule-grid { grid-template-columns: 1fr; }
  .chinese-system, .voice-grid { grid-template-columns: 1fr; }
  section { padding: var(--space-xl) var(--space-lg); }
  nav { padding: 0 var(--space-lg); }
  .nav-links { display: none; }
  .type-row { grid-template-columns: 1fr; }
}