/* ═══════════════════════════════════════════════════════
   DigitalVerse — main.css
   Structure: Tokens → Reset → Layout → Nav → Hero →
              Sections → Cards → Lessons → Comparison →
              Critical Thinking → Glossary → Footer → Utils
═══════════════════════════════════════════════════════ */

/* ─────────────────────────────────────────────
   TOKENS & CUSTOM PROPERTIES
───────────────────────────────────────────── */
:root {
  /* Backgrounds */
  --bg:        #040d1a;
  --bg-2:      #071120;
  --surface:   #0b1829;
  --surface-2: #0f2035;

  /* Borders */
  --border:      rgba(0, 229, 255, 0.12);
  --border-glow: rgba(0, 229, 255, 0.35);

  /* Brand accents */
  --cyan:   #00e5ff;
  --cyan-d: #00b8d9;
  --amber:  #ff9f43;
  --green:  #00e676;
  --red:    #ff4757;
  --purple: #a29bfe;

  /* Protocol colors */
  --btc: #f7931a;
  --eth: #8a92b2;
  --xrp: #25aae1;
  --flr: #e11b71;
  --sgb: #c847f0;

  /* Text */
  --text:   #ddeeff;
  --text-2: #8ab0c8;
  --text-3: #4a7a8a;

  /* Typography */
  --font-display: 'Chakra Petch', sans-serif;
  --font-body:    'Source Serif 4', serif;
  --font-mono:    'JetBrains Mono', monospace;

  /* Radii & shadows */
  --r:    8px;
  --r-lg: 16px;
  --shadow-glow: 0 0 30px rgba(0, 229, 255, 0.08), 0 4px 20px rgba(0, 0, 0, 0.5);
}

/* ─────────────────────────────────────────────
   RESET
───────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  overflow-x: hidden;
}

/* ─────────────────────────────────────────────
   BACKGROUND GRID & RADIAL GLOWS
───────────────────────────────────────────── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(ellipse 80% 50% at 10% 20%, rgba(0, 229, 255, 0.04) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 90% 80%, rgba(225, 27, 113, 0.04) 0%, transparent 60%),
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 39px,
      rgba(0, 229, 255, 0.02) 39px,
      rgba(0, 229, 255, 0.02) 40px
    ),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 39px,
      rgba(0, 229, 255, 0.02) 39px,
      rgba(0, 229, 255, 0.02) 40px
    );
  pointer-events: none;
}

/* ─────────────────────────────────────────────
   SCROLLBAR
───────────────────────────────────────────── */
::-webkit-scrollbar       { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--cyan-d); border-radius: 2px; }

/* ─────────────────────────────────────────────
   LAYOUT
───────────────────────────────────────────── */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

.section    { padding: 96px 0; }
.section--sm { padding: 64px 0; }

/* ─────────────────────────────────────────────
   READING PROGRESS BAR
───────────────────────────────────────────── */
.progress-bar {
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  height: 2px;
  background: transparent;
  z-index: 99;
}

.progress-bar__fill {
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--amber));
  width: 0;
  transition: width 0.1s linear;
}

/* ─────────────────────────────────────────────
   NAV
───────────────────────────────────────────── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(4, 13, 26, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav__inner {
  display: flex;
  align-items: center;
  gap: 32px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
}

.nav__logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--cyan);
  text-decoration: none;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav__logo span {
  color: var(--text-2);
  font-weight: 300;
  font-size: 0.85rem;
}

.nav__links {
  display: flex;
  gap: 24px;
  margin-left: auto;
  list-style: none;
}

.nav__links a {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-2);
  text-decoration: none;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: color 0.2s;
}

.nav__links a:hover { color: var(--cyan); }

.nav__cta {
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--bg);
  background: var(--cyan);
  border: none;
  border-radius: var(--r);
  padding: 9px 20px;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s, box-shadow 0.2s;
}

.nav__cta:hover {
  background: #fff;
  box-shadow: 0 0 20px rgba(0, 229, 255, 0.5);
}

@media (max-width: 768px) {
  .nav__links { display: none; }
}

/* ─────────────────────────────────────────────
   HERO
───────────────────────────────────────────── */
.hero {
  min-height: 88vh;
  display: flex;
  align-items: center;
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}

.hero__scanner {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  animation: scan 4s ease-in-out infinite;
}

@keyframes scan {
  0%   { top: 0; opacity: 0.8; }
  100% { top: 100%; opacity: 0; }
}

.hero__kicker {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
  background: rgba(0, 229, 255, 0.06);
  border: 1px solid var(--border-glow);
  border-radius: 4px;
  padding: 5px 12px;
  display: inline-block;
  margin-bottom: 28px;
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(3rem, 8vw, 6.5rem);
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.hero__title em {
  font-style: normal;
  color: transparent;
  background: linear-gradient(135deg, var(--cyan), var(--amber));
  -webkit-background-clip: text;
  background-clip: text;
}

.hero__sub {
  font-size: 1.15rem;
  color: var(--text-2);
  max-width: 580px;
  margin-bottom: 44px;
  font-weight: 300;
}

.hero__actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 64px;
}

.hero__protocols {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

/* Hero decorative data block */
.hero__deco {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: min(480px, 40vw);
  opacity: 0.18;
  pointer-events: none;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--cyan);
  line-height: 2;
  white-space: pre;
  animation: flicker 6s ease-in-out infinite;
}

@keyframes flicker {
  0%, 95%, 100% { opacity: 0.18; }
  96%           { opacity: 0.08; }
  97%           { opacity: 0.22; }
}

/* ─────────────────────────────────────────────
   BUTTONS
───────────────────────────────────────────── */
.btn {
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 13px 28px;
  border-radius: var(--r);
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all 0.25s;
  display: inline-block;
}

.btn--primary {
  background: var(--cyan);
  color: var(--bg);
}

.btn--primary:hover {
  background: #fff;
  box-shadow: 0 0 30px rgba(0, 229, 255, 0.5);
  transform: translateY(-1px);
}

.btn--ghost {
  background: transparent;
  color: var(--cyan);
  border: 1px solid var(--border-glow);
}

.btn--ghost:hover {
  background: rgba(0, 229, 255, 0.06);
  transform: translateY(-1px);
}

/* ─────────────────────────────────────────────
   PROTOCOL PILLS (hero)
───────────────────────────────────────────── */
.protocol-pill {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  padding: 5px 12px;
  border-radius: 99px;
  border: 1px solid;
}

.protocol-pill.btc  { color: var(--btc); border-color: rgba(247,147,26,0.3);  background: rgba(247,147,26,0.05); }
.protocol-pill.eth  { color: var(--eth); border-color: rgba(138,146,178,0.3); background: rgba(138,146,178,0.05); }
.protocol-pill.xrp  { color: var(--xrp); border-color: rgba(37,170,225,0.3);  background: rgba(37,170,225,0.05); }
.protocol-pill.flr  { color: var(--flr); border-color: rgba(225,27,113,0.3);  background: rgba(225,27,113,0.05); }
.protocol-pill.sgb  { color: var(--sgb); border-color: rgba(200,71,240,0.3);  background: rgba(200,71,240,0.05); }
.protocol-pill.web3 { color: var(--green); border-color: rgba(0,230,118,0.3); background: rgba(0,230,118,0.05); }

/* ─────────────────────────────────────────────
   SECTION HEADERS
───────────────────────────────────────────── */
.section-header { margin-bottom: 56px; }

.section-header__tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 12px;
  display: block;
}

.section-header__title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.01em;
}

.section-header__desc {
  font-size: 1rem;
  color: var(--text-2);
  max-width: 560px;
  margin-top: 12px;
  font-weight: 300;
}

/* ─────────────────────────────────────────────
   CARDS (base)
───────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: border-color 0.3s, box-shadow 0.3s, transform 0.25s;
}

.card:hover {
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
}

.card__header { padding: 28px 28px 0; }
.card__body   { padding: 20px 28px 28px; }

.card__footer {
  padding: 20px 28px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 12px;
}

/* ─────────────────────────────────────────────
   PROTOCOL CARDS
───────────────────────────────────────────── */
.proto-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.proto-card { position: relative; }

.proto-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  border-radius: var(--r-lg) var(--r-lg) 0 0;
}

.proto-card.btc::before  { background: var(--btc); }
.proto-card.eth::before  { background: var(--eth); }
.proto-card.xrp::before  { background: var(--xrp); }
.proto-card.flr::before  { background: var(--flr); }
.proto-card.sgb::before  { background: var(--sgb); }
.proto-card.web3::before { background: var(--green); }

.proto-card__icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 16px;
  font-family: var(--font-display);
  font-weight: 700;
}

.proto-card.btc  .proto-card__icon { background: rgba(247,147,26,0.1);  color: var(--btc); }
.proto-card.eth  .proto-card__icon { background: rgba(138,146,178,0.1); color: var(--eth); }
.proto-card.xrp  .proto-card__icon { background: rgba(37,170,225,0.1);  color: var(--xrp); }
.proto-card.flr  .proto-card__icon { background: rgba(225,27,113,0.1);  color: var(--flr); }
.proto-card.sgb  .proto-card__icon { background: rgba(200,71,240,0.1);  color: var(--sgb); }
.proto-card.web3 .proto-card__icon { background: rgba(0,230,118,0.1);   color: var(--green); }

.proto-card__name {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.proto-card__tagline {
  font-size: 0.85rem;
  color: var(--text-2);
  font-style: italic;
  margin-bottom: 16px;
}

.proto-card__desc {
  font-size: 0.95rem;
  color: var(--text-2);
  line-height: 1.65;
}

/* ─── Chips ─── */
.chip-row {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 16px;
}

.chip {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  padding: 3px 10px;
  border-radius: 4px;
  border: 1px solid;
}

.chip.btc   { background: rgba(247,147,26,0.1);  color: var(--btc);   border-color: rgba(247,147,26,0.2); }
.chip.eth   { background: rgba(138,146,178,0.1); color: var(--eth);   border-color: rgba(138,146,178,0.2); }
.chip.xrp   { background: rgba(37,170,225,0.1);  color: var(--xrp);   border-color: rgba(37,170,225,0.2); }
.chip.flr   { background: rgba(225,27,113,0.1);  color: var(--flr);   border-color: rgba(225,27,113,0.2); }
.chip.sgb   { background: rgba(200,71,240,0.1);  color: var(--sgb);   border-color: rgba(200,71,240,0.2); }
.chip.green { background: rgba(0,230,118,0.1);   color: var(--green); border-color: rgba(0,230,118,0.2); }
.chip.gray  { background: rgba(138,176,200,0.08); color: var(--text-2); border-color: rgba(138,176,200,0.15); }

.lessons-btn {
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--cyan);
  padding: 0;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.2s;
}

.lessons-btn:hover { gap: 10px; }

.lessons-count {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-3);
}

/* ─────────────────────────────────────────────
   LESSON MODULES
───────────────────────────────────────────── */
.lesson-section {
  border-top: 1px solid var(--border);
}

.lesson-module {
  margin-bottom: 72px;
}

.lesson-module__header {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 32px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.lesson-module__icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.lesson-module__title {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
}

.lesson-module__subtitle {
  font-size: 0.9rem;
  color: var(--text-2);
}

.lessons-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* ─── Lesson item ─── */
.lesson-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.lesson-item__trigger {
  width: 100%;
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 22px 28px;
  text-align: left;
  transition: background 0.2s;
}

.lesson-item__trigger:hover {
  background: rgba(0, 229, 255, 0.03);
}

.lesson-item__num {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-3);
  background: var(--surface-2);
  padding: 4px 8px;
  border-radius: 4px;
  flex-shrink: 0;
  letter-spacing: 0.1em;
}

.lesson-item__label {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  flex: 1;
}

.lesson-item__meta {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-3);
  flex-shrink: 0;
}

.lesson-item__chevron {
  color: var(--text-3);
  flex-shrink: 0;
  transition: transform 0.3s;
  font-size: 0.8rem;
}

.lesson-item.open .lesson-item__chevron {
  transform: rotate(180deg);
}

.lesson-item.open {
  border-color: var(--border-glow);
}

/* ─── Lesson body ─── */
.lesson-item__body {
  display: none;
  padding: 0 28px 32px;
  border-top: 1px solid var(--border);
  animation: fadeIn 0.2s ease;
}

.lesson-item.open .lesson-item__body {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ─── Lesson content typography ─── */
.lesson-content {
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--text-2);
  line-height: 1.8;
  padding-top: 24px;
}

.lesson-content p { margin-bottom: 16px; }

.lesson-content h4 {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0.05em;
  margin: 24px 0 10px;
}

.lesson-content ul {
  padding-left: 20px;
  margin-bottom: 16px;
}

.lesson-content li { margin-bottom: 8px; }

.lesson-content strong { color: var(--text); font-weight: 600; }

.lesson-content em {
  color: var(--cyan);
  font-style: normal;
  font-family: var(--font-mono);
  font-size: 0.9em;
}

/* ─── Callouts ─── */
.lesson-content .callout {
  background: rgba(0, 229, 255, 0.04);
  border-left: 3px solid var(--cyan);
  border-radius: 0 var(--r) var(--r) 0;
  padding: 14px 18px;
  margin: 20px 0;
  font-size: 0.95rem;
}

.lesson-content .callout.warning {
  background: rgba(255, 159, 67, 0.04);
  border-color: var(--amber);
}

.lesson-content .callout.danger {
  background: rgba(255, 71, 87, 0.04);
  border-color: var(--red);
}

.lesson-content .callout.success {
  background: rgba(0, 230, 118, 0.04);
  border-color: var(--green);
}

/* ─── Fact blocks ─── */
.fact-block {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
  margin: 20px 0;
}

.fact-item {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 14px 16px;
}

.fact-item__val {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--cyan);
  margin-bottom: 4px;
}

.fact-item__key {
  font-family: var(--font-display);
  font-size: 0.68rem;
  color: var(--text-3);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ─────────────────────────────────────────────
   COMPARISON TABLE
───────────────────────────────────────────── */
.comparison-wrap { overflow-x: auto; }

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.comparison-table th,
.comparison-table td {
  padding: 14px 20px;
  border: 1px solid var(--border);
  text-align: left;
}

.comparison-table thead th {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: var(--surface);
  color: var(--text-2);
}

.comparison-table tbody tr:nth-child(even) td {
  background: rgba(255, 255, 255, 0.015);
}

.comparison-table .label-col {
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-2);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  white-space: nowrap;
}

.comparison-table .mono {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--cyan);
}

/* ─────────────────────────────────────────────
   CRITICAL THINKING CARDS
───────────────────────────────────────────── */
.ct-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.ct-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 28px;
}

.ct-card.danger  { border-color: rgba(255, 71, 87, 0.2); }
.ct-card.warning { border-color: rgba(255, 159, 67, 0.2); }
.ct-card.success { border-color: rgba(0, 230, 118, 0.2); }

.ct-card__icon  { font-size: 2rem; margin-bottom: 14px; }

.ct-card__title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.ct-card__body {
  font-size: 0.92rem;
  color: var(--text-2);
  line-height: 1.7;
}

.ct-card__list {
  list-style: none;
  margin-top: 12px;
}

.ct-card__list li {
  font-size: 0.88rem;
  color: var(--text-2);
  padding: 6px 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.ct-card__list li:last-child { border-bottom: none; }

.ct-card__list li::before {
  content: '›';
  color: var(--cyan);
  flex-shrink: 0;
}

/* ─────────────────────────────────────────────
   VERIFICATION SKILL TRACK
───────────────────────────────────────────── */
.skill-track {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  position: relative;
}

.skill-track::before {
  content: '';
  position: absolute;
  top: 28px;
  left: 50px;
  right: 50px;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--amber));
  z-index: 0;
}

.skill-level {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 28px 20px;
  position: relative;
  z-index: 1;
  transition: border-color 0.3s;
}

.skill-level:first-child { border-radius: var(--r-lg) 0 0 var(--r-lg); }
.skill-level:last-child  { border-radius: 0 var(--r-lg) var(--r-lg) 0; }
.skill-level:hover       { border-color: var(--border-glow); }

.skill-level__dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--cyan);
  margin-bottom: 16px;
  box-shadow: 0 0 12px var(--cyan);
}

.skill-level:nth-child(2) .skill-level__dot { background: #63e0f0; }
.skill-level:nth-child(3) .skill-level__dot { background: var(--amber); box-shadow: 0 0 12px var(--amber); }

.skill-level__label {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 14px;
}

.skill-level__items { list-style: none; }

.skill-level__items li {
  font-size: 0.88rem;
  color: var(--text-2);
  padding: 5px 0;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.skill-level__items li::before {
  content: '—';
  color: var(--cyan);
  font-size: 0.7rem;
  margin-top: 3px;
}

@media (max-width: 640px) {
  .skill-track { grid-template-columns: 1fr; }
  .skill-track::before { display: none; }
  .skill-level { border-radius: 0 !important; }
  .skill-level:first-child { border-radius: var(--r-lg) var(--r-lg) 0 0 !important; }
  .skill-level:last-child  { border-radius: 0 0 var(--r-lg) var(--r-lg) !important; }
}

/* ─────────────────────────────────────────────
   GLOSSARY
───────────────────────────────────────────── */
.glossary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}

.glossary-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 18px 20px;
}

.glossary-item__term {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--cyan);
  margin-bottom: 6px;
}

.glossary-item__def {
  font-size: 0.88rem;
  color: var(--text-2);
  line-height: 1.6;
}

/* ─────────────────────────────────────────────
   CTA BANNER
───────────────────────────────────────────── */
.callout-banner {
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.06), rgba(225, 27, 113, 0.04));
  border: 1px solid var(--border-glow);
  border-radius: var(--r-lg);
  padding: 48px;
  display: flex;
  align-items: center;
  gap: 40px;
  flex-wrap: wrap;
}

.callout-banner__text { flex: 1; min-width: 240px; }

.callout-banner__title {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.callout-banner__desc {
  font-size: 1rem;
  color: var(--text-2);
}

/* ─────────────────────────────────────────────
   FOOTER
───────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border);
  padding: 56px 0 32px;
}

.footer__inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

@media (max-width: 768px) { .footer__inner { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .footer__inner { grid-template-columns: 1fr; } }

.footer__logo {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--cyan);
  text-decoration: none;
  display: block;
  margin-bottom: 12px;
}

.footer__desc {
  font-size: 0.88rem;
  color: var(--text-3);
  line-height: 1.7;
}

.footer__col h4 {
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-2);
  margin-bottom: 14px;
}

.footer__col ul       { list-style: none; }
.footer__col ul li    { margin-bottom: 8px; }

.footer__col ul li a {
  font-size: 0.88rem;
  color: var(--text-3);
  text-decoration: none;
  transition: color 0.2s;
}

.footer__col ul li a:hover { color: var(--cyan); }

.footer__bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer__copy { font-size: 0.8rem; color: var(--text-3); }

.footer__legal { display: flex; gap: 20px; }

.footer__legal a {
  font-size: 0.78rem;
  color: var(--text-3);
  text-decoration: none;
}

.footer__legal a:hover { color: var(--cyan); }

/* ─────────────────────────────────────────────
   UTILITY
───────────────────────────────────────────── */
.read-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  color: var(--text-3);
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.text-cyan  { color: var(--cyan); }
.text-amber { color: var(--amber); }
.text-green { color: var(--green); }
.text-muted { color: var(--text-2); }

.mt-8  { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mb-8  { margin-bottom: 8px; }