/* ============================================================
   PLUMB LANDING PAGE — landing.css
   Layered on top of tokens.css
   ============================================================ */

html, body { margin: 0; padding: 0; }
body {
  background: var(--bg-primary);
  color: var(--fg-primary);
  font-family: var(--font-grotesk);
  overflow-x: hidden;
}

/* Fixed left/right corner labels — drafting-sheet metadata */
.sheet-margin {
  position: fixed;
  top: 0;
  bottom: 0;
  width: 48px;
  pointer-events: none;
  z-index: 5;
  display: none;
}
@media (min-width: 1100px) {
  .sheet-margin { display: block; }
}
.sheet-margin .tick {
  position: absolute;
  font-family: var(--font-mono);
  font-size: 9px;
  color: rgba(26,26,26,0.28);
  letter-spacing: 0.06em;
  white-space: nowrap;
}
.sheet-margin.left { left: 0; border-right: 1px solid rgba(26,26,26,0.06); }
.sheet-margin.right { right: 0; border-left: 1px solid rgba(26,26,26,0.06); }

.sheet-margin.left .tick {
  left: 14px;
  transform: rotate(-90deg);
  transform-origin: 0 0;
}
.sheet-margin.right .tick {
  right: 14px;
  transform: rotate(90deg) translateX(-100%);
  transform-origin: 100% 0;
}

/* Page container */
.page {
  position: relative;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
}
@media (min-width: 768px) {
  .page { padding: 0 48px; }
}
@media (min-width: 1280px) {
  .page { padding: 0 64px; }
}

/* Top global nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0 16px;
  background: rgba(232,226,213,0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-default);
}
.nav-mark {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-grotesk); font-weight: 500;
  font-size: 18px; letter-spacing: -0.01em;
  color: var(--fg-primary); text-decoration: none;
}
.nav-mark svg { display: block; }
.nav-links {
  display: flex; gap: 32px; align-items: center;
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: 0.04em;
  color: rgba(26,26,26,0.55);
}
.nav-links a {
  color: inherit; text-decoration: none;
  transition: color 120ms var(--ease-standard);
}
.nav-links a:hover { color: var(--fg-primary); }
@media (max-width: 640px) {
  .nav-links { display: none; }
}

/* Section structure */
.section {
  position: relative;
  padding: 96px 0;
}
.section.compact { padding: 64px 0; }
.section.tight { padding: 48px 0; }

/* Section label — corner of section, drafting-style */
.section-corner {
  display: none;
}

/* Mono label */
.mono-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: rgba(26,26,26,0.45);
  text-transform: lowercase;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.mono-label::before {
  content: "";
  display: inline-block;
  width: 16px; height: 1px;
  background: rgba(26,26,26,0.35);
}

/* Big display heading */
.display {
  font-family: var(--font-grotesk);
  font-weight: 400;
  font-size: clamp(40px, 6vw, 72px);
  line-height: 1.04;
  letter-spacing: -0.025em;
  color: var(--fg-primary);
  margin: 0;
}
.display em {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  letter-spacing: -0.02em;
}

/* Section heading */
.section-h {
  font-family: var(--font-grotesk);
  font-weight: 400;
  font-size: clamp(28px, 3.4vw, 44px);
  line-height: 1.1;
  letter-spacing: -0.022em;
  margin: 0;
}

/* Eyebrow — mono caps small */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: rgba(26,26,26,0.52);
  text-transform: lowercase;
  margin: 0 0 24px;
}

/* Body para — slightly larger, generous leading */
.lead {
  font-family: var(--font-grotesk);
  font-size: 18px;
  line-height: 1.55;
  color: rgba(26,26,26,0.78);
  max-width: 56ch;
  text-wrap: pretty;
}

/* Buttons */
.btn {
  --btn-bg: var(--color-graphite);
  --btn-fg: var(--color-vellum);
  --btn-bdr: var(--color-graphite);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 20px;
  font-family: var(--font-grotesk);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: -0.005em;
  color: var(--btn-fg);
  background: var(--btn-bg);
  border: 1px solid var(--btn-bdr);
  border-radius: 3px;
  cursor: default;
  text-decoration: none;
  transition:
    transform 120ms var(--ease-standard),
    background-color 160ms var(--ease-standard),
    box-shadow 160ms var(--ease-standard);
  user-select: none;
}
.btn:hover { background: #2a2a2a; box-shadow: 0 1px 3px rgba(26,26,26,0.18); }
.btn:active { transform: scale(0.98); box-shadow: inset 0 1px 2px rgba(0,0,0,0.25); }
.btn .arrow {
  display: inline-block;
  transition: transform 200ms var(--ease-standard);
}
.btn:hover .arrow { transform: translateX(3px); }

.btn.ghost {
  --btn-bg: transparent;
  --btn-fg: var(--color-graphite);
  --btn-bdr: rgba(26,26,26,0.24);
}
.btn.ghost:hover { background: rgba(26,26,26,0.04); box-shadow: none; }

.btn.brass {
  --btn-bg: var(--color-graphite);
  --btn-fg: var(--color-vellum);
  --btn-bdr: var(--color-graphite);
}

/* Number readouts (always mono) */
.readout {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}

/* Hairline divider */
.hairline {
  height: 1px;
  background: var(--border-default);
  width: 100%;
  border: 0;
  margin: 0;
}

/* Reveal-on-scroll */
.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition:
    opacity 600ms var(--ease-standard),
    transform 600ms var(--ease-standard);
}
.reveal.in {
  opacity: 1;
  transform: translateY(0);
}

/* Inline tag */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px 3px 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  color: rgba(26,26,26,0.62);
  background: rgba(26,26,26,0.05);
  border: 1px solid rgba(26,26,26,0.1);
  border-radius: 2px;
}
.tag.alert {
  color: var(--color-redline);
  background: rgba(184,58,45,0.06);
  border-color: rgba(184,58,45,0.25);
}
.tag.prussian {
  color: var(--color-prussian);
  background: rgba(27,58,92,0.06);
  border-color: rgba(27,58,92,0.2);
}
.tag.brass {
  color: var(--color-brass);
  background: rgba(201,169,97,0.1);
  border-color: rgba(201,169,97,0.3);
}

/* Card */
.card {
  background: var(--color-surface-raised);
  border: 1px solid var(--border-default);
  border-radius: 3px;
  padding: 28px;
  position: relative;
}
.card.dark {
  background: var(--color-surface-dark);
  color: var(--color-vellum);
  border-color: rgba(255,255,255,0.08);
}

/* Form input */
.input {
  width: 100%;
  padding: 12px 14px;
  font-family: var(--font-grotesk);
  font-size: 14px;
  color: var(--fg-primary);
  background: var(--color-surface-white);
  border: 1px solid rgba(26,26,26,0.18);
  border-radius: 3px;
  outline: none;
  transition: border-color 120ms var(--ease-standard);
}
.input:focus { border-color: var(--color-prussian); box-shadow: 0 0 0 3px rgba(27,58,92,0.12); }
.input::placeholder { color: rgba(26,26,26,0.32); }

/* Select */
.select {
  width: 100%;
  padding: 12px 14px;
  font-family: var(--font-grotesk);
  font-size: 14px;
  color: var(--fg-primary);
  background: var(--color-surface-white);
  border: 1px solid rgba(26,26,26,0.18);
  border-radius: 3px;
  appearance: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'><path fill='none' stroke='%231A1A1A' stroke-width='1.2' d='M1 1.5l5 5 5-5'/></svg>");
  background-repeat: no-repeat;
  background-position: right 14px center;
  outline: none;
}
.select:focus { border-color: var(--color-prussian); box-shadow: 0 0 0 3px rgba(27,58,92,0.12); }

/* Field label */
.field-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: rgba(26,26,26,0.52);
  margin-bottom: 6px;
  text-transform: lowercase;
}

/* Hide tweak panel chrome on prints */
@media print { .twk-panel, .tweaks-fab { display: none !important; } }