/* design-system.css — Ruan Ferreira | Educador Financeiro */

:root {
  /* Palette: Navy + Off-white + Forest + Gold */
  --ink-900: #0B1F3A;     /* deep navy — primary text on light */
  --ink-700: #1E3253;
  --ink-500: #4A5C7A;
  --ink-400: #6E7E97;
  --ink-300: #94A1B5;
  --ink-200: #C7CEDA;
  --ink-100: #E4E8EF;
  --ink-50:  #F0F2F6;

  --paper:    #F7F5F0;    /* off-white background */
  --paper-2:  #EFEBE2;    /* warmer card */
  --paper-3:  #E6E0D2;    /* divider */
  --white:    #FFFFFF;

  --green-700: #0A4A2E;
  --green-600: #0E5C3A;   /* primary CTA */
  --green-500: #157A4D;
  --green-100: #D7E7DD;

  --gold-700: #A37C30;
  --gold-600: #C5953F;
  --gold-500: #D4A24C;    /* accent */
  --gold-100: #F0E3C5;

  --red-600:  #B23A3A;
  --red-100:  #F2DEDE;

  /* Type */
  --font-display: "Instrument Serif", "Source Serif 4", Georgia, serif;
  --font-sans:    "Inter Tight", "Söhne", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono:    "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  /* Spacing scale */
  --s-1: 4px; --s-2: 8px; --s-3: 12px; --s-4: 16px; --s-5: 20px;
  --s-6: 24px; --s-8: 32px; --s-10: 40px; --s-12: 48px; --s-16: 64px;
  --s-20: 80px; --s-24: 96px; --s-32: 128px;

  /* Radii */
  --r-1: 4px; --r-2: 6px; --r-3: 10px; --r-4: 14px; --r-5: 20px;

  /* Container */
  --container: 1280px;
  --container-narrow: 980px;

  /* Surfaces by role */
  --bg: var(--paper);
  --surface: var(--white);
  --surface-2: var(--paper-2);
  --border: rgba(11, 31, 58, 0.10);
  --border-strong: rgba(11, 31, 58, 0.18);
  --text: var(--ink-900);
  --text-muted: var(--ink-500);
  --text-soft: var(--ink-400);
  --accent: var(--green-600);
  --accent-fg: #FFFFFF;
  --gold: var(--gold-500);

  /* "Fixed" tokens — these DO NOT flip in dark mode.
     Use for sections that should remain dark navy (or off-white) in both themes. */
  --ink-fixed:   #0B1F3A;
  --paper-fixed: #F7F5F0;
}

[data-theme="dark"] {
  --bg: #0A1424;
  --surface: #0F1D33;
  --surface-2: #142948;
  --paper-2: #142948;
  --paper-3: #1B3358;
  --border: rgba(255,255,255,0.08);
  --border-strong: rgba(255,255,255,0.16);
  --text: #ECEFF6;
  --text-muted: #A2AFC4;
  --text-soft: #7A8AA3;
  --ink-900: #ECEFF6;
  --ink-700: #C9D2E0;
  --ink-500: #A2AFC4;
  --ink-400: #7A8AA3;
  --ink-300: #5C6E8C;
  --ink-200: #2A3F60;
  --ink-100: #1B3358;
  --ink-50:  #142948;
  --accent: #2EBE7E;
  --gold: #E0B564;
}

/* Base */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.55;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: "ss01", "cv11";
}

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

/* Typography */
.eyebrow {
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.eyebrow .dot { color: var(--gold); margin-right: 8px; }

.h-display {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(48px, 6vw, 88px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--text);
  margin: 0;
  text-wrap: balance;
}
.h1 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(36px, 4.2vw, 60px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0;
  text-wrap: balance;
}
.h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(28px, 3vw, 42px);
  line-height: 1.1;
  letter-spacing: -0.018em;
  margin: 0;
  text-wrap: balance;
}
.h3 {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 20px;
  line-height: 1.25;
  letter-spacing: -0.005em;
  margin: 0;
}
.h4 {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 16px;
  line-height: 1.3;
  margin: 0;
}
.lede {
  font-family: var(--font-sans);
  font-size: 19px;
  line-height: 1.5;
  color: var(--text-muted);
  font-weight: 400;
  text-wrap: pretty;
}
.body { font-size: 15px; line-height: 1.6; color: var(--text-muted); }
.tiny { font-size: 12px; line-height: 1.4; color: var(--text-soft); }
.mono { font-family: var(--font-mono); font-feature-settings: "tnum"; }
.tabular { font-variant-numeric: tabular-nums; }

em.serif-i { font-family: var(--font-display); font-style: italic; font-weight: 400; }

/* Layout primitives */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
.container-narrow {
  width: 100%;
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 0 24px;
}
.section { padding: var(--s-20) 0; }
.section-tight { padding: var(--s-12) 0; }
.section-lg { padding: var(--s-24) 0; }

.divider { height: 1px; background: var(--border); width: 100%; }
.hairline { border-top: 1px solid var(--border); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 14.5px;
  letter-spacing: -0.005em;
  padding: 12px 18px;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: transform .15s ease, background .15s ease, color .15s ease, border-color .15s ease;
  white-space: nowrap;
  user-select: none;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--accent);
  color: var(--accent-fg);
  border-color: var(--accent);
}
.btn-primary:hover { background: var(--green-700); border-color: var(--green-700); }
[data-theme="dark"] .btn-primary:hover { background: #36D094; border-color: #36D094; }

.btn-dark {
  background: var(--ink-900);
  color: var(--paper);
  border-color: var(--ink-900);
}
[data-theme="dark"] .btn-dark { background: var(--paper); color: var(--ink-900); border-color: var(--paper); }

.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border-strong);
}
.btn-ghost:hover { background: var(--surface); }

.btn-gold {
  background: var(--gold);
  color: #2A1F08;
  border-color: var(--gold);
}
.btn-gold:hover { background: var(--gold-600); }

.btn-sm { padding: 8px 14px; font-size: 13px; }
.btn-lg { padding: 14px 22px; font-size: 15.5px; }
.btn-arrow::after {
  content: "→";
  font-family: var(--font-sans);
  transition: transform .2s ease;
}
.btn-arrow:hover::after { transform: translateX(3px); }

/* Cards */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-3);
  padding: 24px;
  transition: border-color .2s ease, transform .2s ease;
}
.card:hover { border-color: var(--border-strong); }
.card-flat { background: transparent; border: 1px solid var(--border); }

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.02em;
  background: var(--surface-2);
  color: var(--text-muted);
  border: 1px solid var(--border);
}
.badge-green { background: var(--green-100); color: var(--green-700); border-color: rgba(14,92,58,0.18); }
.badge-gold  { background: var(--gold-100); color: var(--gold-700); border-color: rgba(163,124,48,0.22); }
.badge-dark  { background: var(--ink-fixed); color: var(--paper-fixed); border-color: var(--ink-fixed); }
[data-theme="dark"] .badge-green { background: rgba(46,190,126,0.15); color: #5BD89A; border-color: rgba(46,190,126,0.3); }
[data-theme="dark"] .badge-gold  { background: rgba(224,181,100,0.15); color: var(--gold); border-color: rgba(224,181,100,0.3); }

/* Inputs */
.input, .textarea, .select {
  font-family: var(--font-sans);
  font-size: 14.5px;
  width: 100%;
  padding: 12px 14px;
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-2);
  outline: none;
  transition: border-color .15s ease, box-shadow .15s ease;
}
.input:focus, .textarea:focus, .select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(14,92,58,0.12);
}
.label { display: block; font-size: 12px; font-weight: 500; color: var(--text-muted); margin-bottom: 6px; letter-spacing: 0.01em; }

/* Utility */
.flex { display: flex; }
.col { display: flex; flex-direction: column; }
.between { justify-content: space-between; }
.center { align-items: center; }
.gap-1 { gap: 4px; } .gap-2 { gap: 8px; } .gap-3 { gap: 12px; }
.gap-4 { gap: 16px; } .gap-6 { gap: 24px; } .gap-8 { gap: 32px; }
.muted { color: var(--text-muted); }
.soft  { color: var(--text-soft); }
.up { text-transform: uppercase; letter-spacing: 0.08em; }
.no-wrap { white-space: nowrap; }

/* Tickers (market data) */
.ticker-up   { color: var(--green-500); }
.ticker-down { color: var(--red-600); }
[data-theme="dark"] .ticker-up { color: #4ED9A0; }
[data-theme="dark"] .ticker-down { color: #E26A6A; }

/* Sparkline default */
.spark { display: block; width: 100%; height: 36px; }

/* Scroll-in animations */
@keyframes riseIn {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}
.rise {
  opacity: 0;
  animation: riseIn .7s cubic-bezier(.2,.7,.2,1) forwards;
}
.rise.in { opacity: 1; }
.delay-1 { animation-delay: .08s; }
.delay-2 { animation-delay: .16s; }
.delay-3 { animation-delay: .24s; }
.delay-4 { animation-delay: .32s; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

/* Editorial figure */
.figure-strip {
  background:
    repeating-linear-gradient(135deg, var(--paper-2) 0 12px, var(--paper-3) 12px 13px);
  border: 1px solid var(--border);
  border-radius: var(--r-3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-soft);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
[data-theme="dark"] .figure-strip {
  background: repeating-linear-gradient(135deg, var(--surface) 0 12px, var(--surface-2) 12px 13px);
}

/* Small icon system (CSS-only glyphs from unicode/inline svg via mask) */
.ic { width: 18px; height: 18px; display: inline-block; vertical-align: -3px; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  border-bottom: 1px solid var(--border);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark {
  width: 30px; height: 30px;
  border-radius: 50%;
  background: var(--ink-900);
  color: var(--paper);
  display: grid; place-items: center;
  font-family: var(--font-display);
  font-size: 17px;
  letter-spacing: -0.02em;
}
[data-theme="dark"] .brand-mark { background: var(--paper); color: var(--ink-900); }
.brand-name { font-family: var(--font-sans); font-weight: 600; letter-spacing: -0.01em; font-size: 15.5px; }
.brand-name span { color: var(--text-muted); font-weight: 400; }

.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-link {
  font-size: 14px;
  padding: 8px 12px;
  border-radius: 999px;
  color: var(--text-muted);
  transition: color .15s ease, background .15s ease;
}
.nav-link:hover { color: var(--text); background: var(--surface-2); }
.nav-link.active { color: var(--text); }

/* Nav dropdown (Conteúdos) */
.nav-dd { position: relative; }
.nav-dd-trigger {
  display: inline-flex; align-items: center; gap: 5px;
  font: inherit; border: 0; background: transparent; cursor: pointer;
}
.nav-dd-caret { font-size: 9px; transition: transform .2s ease; }
.nav-dd-menu {
  position: absolute; top: calc(100% + 8px); left: 50%; transform: translateX(-50%);
  width: 290px; background: var(--surface);
  border: 1px solid var(--border); border-radius: 12px;
  box-shadow: 0 16px 40px rgba(11,31,58,0.16);
  padding: 8px; display: flex; flex-direction: column; gap: 2px;
  transition: opacity .18s ease, transform .18s ease, visibility .18s;
  z-index: 60;
}
.nav-dd:hover .nav-dd-menu { left: auto; right: 0; transform: translateY(0) !important; }
.nav-dd-item {
  display: flex; flex-direction: column; gap: 2px;
  padding: 10px 12px; border-radius: 8px; transition: background .14s ease;
}
.nav-dd-item:hover { background: var(--surface-2); }
.nav-dd-item.active { background: var(--surface-2); }
.nav-dd-item-t { font-size: 14px; font-weight: 600; color: var(--text); }
.nav-dd-item-d { font-size: 12px; color: var(--text-soft); }

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
  padding: 64px 0 40px;
  margin-top: 80px;
}

/* Grids */
.grid { display: grid; gap: 16px; }
.g-cols-2 { grid-template-columns: repeat(2, 1fr); }
.g-cols-3 { grid-template-columns: repeat(3, 1fr); }
.g-cols-4 { grid-template-columns: repeat(4, 1fr); }
.g-cols-6 { grid-template-columns: repeat(6, 1fr); }

@media (max-width: 900px) {
  .g-cols-3, .g-cols-4 { grid-template-columns: repeat(2, 1fr); }
  .g-cols-6 { grid-template-columns: repeat(3, 1fr); }
  .nav-links { display: none; }
}
@media (max-width: 600px) {
  .g-cols-2, .g-cols-3, .g-cols-4, .g-cols-6 { grid-template-columns: 1fr; }
}

/* Theme toggle button */
.theme-toggle {
  width: 36px; height: 36px;
  display: grid; place-items: center;
  border-radius: 999px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
}
.theme-toggle:hover { background: var(--surface-2); color: var(--text); }

/* ────────────────────────────────────────────────────────────
   ARTICLE PAGES — editorial reading layout
   ──────────────────────────────────────────────────────────── */

.article-body {
  max-width: 720px;
  margin: 0 auto;
  padding: 64px 24px 96px;
}

.article-head {
  margin-bottom: 48px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--border);
}
.article-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 32px;
  text-decoration: none;
  transition: color .15s ease;
}
.article-back:hover { color: var(--text); }
.article-cat {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold-700);
  margin-bottom: 18px;
}
[data-theme="dark"] .article-cat { color: var(--gold); }
.article-title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(36px, 5vw, 56px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--text);
  margin: 0 0 20px;
  text-wrap: balance;
}
.article-lede {
  font-family: var(--font-sans);
  font-size: 20px;
  line-height: 1.5;
  color: var(--text-muted);
  font-weight: 400;
  margin: 0 0 26px;
  text-wrap: pretty;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-soft);
  letter-spacing: 0.04em;
}
.article-meta .dot { color: var(--gold); }

/* Article prose — typography optimized for reading */
.article-prose {
  font-family: var(--font-sans);
  font-size: 18px;
  line-height: 1.75;
  color: var(--text);
}
.article-prose > p,
.article-prose > ul,
.article-prose > ol,
.article-prose > blockquote {
  margin: 0 0 24px;
}
.article-prose p { text-wrap: pretty; }
.article-prose .lead {
  font-size: 22px;
  line-height: 1.55;
  color: var(--text);
  font-weight: 400;
}
.article-prose h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(26px, 3vw, 34px);
  line-height: 1.18;
  letter-spacing: -0.018em;
  color: var(--text);
  margin: 56px 0 16px;
  text-wrap: balance;
}
.article-prose h3 {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 20px;
  line-height: 1.3;
  color: var(--text);
  margin: 40px 0 12px;
  letter-spacing: -0.005em;
}
.article-prose strong { color: var(--text); font-weight: 600; }
.article-prose em { font-family: var(--font-display); font-style: italic; }
.article-prose a {
  color: var(--green-500);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
.article-prose a:hover { color: var(--green-700); }
[data-theme="dark"] .article-prose a:hover { color: #4ED9A0; }

.article-prose blockquote {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 26px;
  line-height: 1.4;
  color: var(--text);
  border-left: 3px solid var(--gold);
  padding: 4px 0 4px 28px;
  margin: 40px 0;
  text-wrap: balance;
}
.article-prose ul,
.article-prose ol {
  padding-left: 24px;
}
.article-prose li {
  margin-bottom: 10px;
  padding-left: 6px;
}
.article-prose ul li::marker { color: var(--gold); }
.article-prose hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 48px auto;
  width: 80px;
}
.article-prose code {
  font-family: var(--font-mono);
  font-size: 0.92em;
  background: var(--surface-2);
  padding: 2px 6px;
  border-radius: 4px;
}

.article-foot {
  margin-top: 64px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}
.article-bio {
  display: flex;
  gap: 18px;
  align-items: start;
  padding: 24px;
  background: var(--surface-2);
  border-radius: 14px;
  margin-bottom: 32px;
}
.article-bio-avatar {
  width: 56px; height: 56px; border-radius: 50%;
  background: var(--ink-900); color: var(--paper);
  display: grid; place-items: center;
  font-family: var(--font-display);
  font-size: 24px;
  flex-shrink: 0;
}
[data-theme="dark"] .article-bio-avatar { background: var(--paper); color: var(--ink-fixed); }
.article-bio-text {
  font-size: 14px;
  line-height: 1.55;
  color: var(--text-muted);
}
.article-bio-text strong { color: var(--text); display: block; margin-bottom: 4px; }

.article-related {
  margin-top: 48px;
}
.article-related-title {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 18px;
}

@media (max-width: 640px) {
  .article-body { padding: 40px 20px 64px; }
  .article-prose { font-size: 17px; }
  .article-prose .lead { font-size: 19px; }
  .article-prose blockquote { font-size: 22px; padding-left: 20px; }
}

/* Article tables — editorial style */
.article-prose .table-wrap {
  margin: 32px 0;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
}

/* Article hero image */
.article-hero {
  margin: 0 0 36px;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--border);
  aspect-ratio: 3 / 2;
  background: var(--surface);
}
.article-hero img,
.article-hero svg {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
@media (max-width: 640px) {
  .article-hero { margin-bottom: 28px; border-radius: 10px; }
}
.article-prose table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.5;
}
.article-prose table thead tr {
  background: var(--surface-2);
}
.article-prose table th {
  text-align: left;
  font-family: var(--font-sans);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-strong);
  vertical-align: top;
}
.article-prose table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  vertical-align: top;
}
.article-prose table tr:last-child td {
  border-bottom: none;
}
.article-prose table tr:hover td {
  background: var(--surface-2);
}
/* When no thead present, treat first row as visual emphasis */
.article-prose table:not(:has(thead)) tr:first-child td {
  background: var(--surface-2);
  font-weight: 600;
  border-bottom: 1px solid var(--border-strong);
}
.article-prose table strong { color: var(--text); }
.article-prose table em { font-style: italic; }

@media (max-width: 640px) {
  .article-prose table { font-size: 13.5px; }
  .article-prose table th,
  .article-prose table td { padding: 10px 12px; }
}

/* Article callout boxes (highlighted note cards) */
.article-prose .callout-box {
  margin: 32px 0;
  padding: 22px 26px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-left: 4px solid var(--gold);
  border-radius: 12px;
}
.article-prose .callout-box .callout-title {
  display: block;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 16px;
  line-height: 1.3;
  color: var(--text);
  margin: 0 0 8px;
  letter-spacing: -0.005em;
}
.article-prose .callout-box p {
  margin: 0;
  font-size: 16px;
  line-height: 1.65;
  color: var(--text-muted);
}
.article-prose .callout-box p + p { margin-top: 12px; }

/* Season header (for the 4-seasons article) */
.article-prose .season-head {
  margin: 56px 0 18px;
  padding: 26px 28px;
  border-radius: 14px;
  background: var(--ink-fixed);
  color: var(--paper-fixed);
}
.article-prose .season-head .season-name {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(28px, 3.4vw, 38px);
  line-height: 1.1;
  letter-spacing: -0.018em;
  margin: 0;
  color: var(--paper-fixed);
}
.article-prose .season-head .season-tag {
  font-family: var(--font-sans);
  font-style: italic;
  font-size: 16px;
  line-height: 1.5;
  margin: 10px 0 0;
  color: rgba(247, 245, 240, 0.78);
}