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

:root {
  /* Apple HIG Dark Mode */
  --bg:              #000000;
  --surface:         #1c1c1e;
  --surface-2:       #2c2c2e;
  --surface-3:       #3a3a3c;
  --separator:       rgba(84, 84, 88, 0.65);
  --border:          rgba(84, 84, 88, 0.36);
  --text-primary:    #f5f5f7;
  --text-secondary:  rgba(235, 235, 245, 0.60);
  --text-tertiary:   rgba(235, 235, 245, 0.30);
  --accent:          #0a84ff;
  --label-green:     #30d158;
  --label-orange:    #ff9f0a;
  --label-bg-green:  rgba(48, 209, 88, 0.10);
  --label-bg-orange: rgba(255, 159, 10, 0.10);
  --shadow-card:     0 2px 20px rgba(0, 0, 0, 0.30), 0 1px 4px rgba(0, 0, 0, 0.20);
  --shadow-card-hover: 0 8px 40px rgba(0, 0, 0, 0.40), 0 2px 8px rgba(0, 0, 0, 0.30);
  --font:      -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Cascadia Code", monospace;
  --radius-card: 16px;
  --radius-sm:   8px;
  --radius-tag:  6px;
}

html, body {
  min-height: 100vh;
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
}

/* ── NAV ── */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(0, 0, 0, 0.82);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 0.5px solid var(--separator);
  padding: 0 32px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-title {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  text-decoration: none;
}

.nav-right {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 400;
}

.nav-back {
  font-size: 13px;
  color: var(--accent);
  font-weight: 400;
  text-decoration: none;
  transition: opacity 0.15s;
}
.nav-back:hover { opacity: 0.7; }

/* ── HERO ── */
.hero {
  padding: 56px 32px 12px;
  max-width: 960px;
  margin: 0 auto;
}

.hero-eyebrow {
  font-size: 13px;
  font-weight: 500;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 8px;
}

.hero-title {
  font-size: 34px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  line-height: 1.12;
  margin-bottom: 10px;
}

.hero-sub {
  font-size: 17px;
  font-weight: 400;
  color: var(--text-secondary);
  line-height: 1.5;
  letter-spacing: -0.01em;
}

/* ── SECTION LABEL ── */
.section-label {
  max-width: 960px;
  margin: 40px auto 12px;
  padding: 0 32px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ── FOOTER ── */
footer {
  border-top: 0.5px solid var(--separator);
  padding: 20px 32px;
  text-align: center;
  font-size: 12px;
  color: var(--text-tertiary);
  font-weight: 400;
  letter-spacing: 0.01em;
}

@media (max-width: 600px) {
  nav            { padding: 0 16px; }
  .hero          { padding: 36px 16px 8px; }
  .hero-title    { font-size: 26px; }
  .hero-sub      { font-size: 15px; }
  .section-label { padding: 0 16px; }
  footer         { padding: 20px 16px; }
}