/*
 * gantt400.com landing — shared styles.
 *
 * Self-contained, dependency-free, no build step. Palette mirrors the live
 * app theme tokens (frontend/src/styles/global.css, dark family): sky accent,
 * slate chrome, indigo/emerald/cyan parent slabs, amber milestones, fuchsia
 * critical path, rose today-line. Dark-only ("midnight-professional") — a
 * marketing surface, not the themeable app shell.
 */

:root {
  /* Chrome */
  --canvas: #0f172a; /* slate-900 */
  --surface: #1e293b; /* slate-800 */
  --elevated: #334155; /* slate-700 */
  --border: #334155;
  --border-soft: rgba(148, 163, 184, 0.16);

  /* Text */
  --text: #f1f5f9; /* slate-100 */
  --text-secondary: #cbd5e1; /* slate-300 */
  --text-muted: #94a3b8; /* slate-400 */
  --text-dim: #64748b; /* slate-500 */

  /* Brand — sky accent (app accent token) */
  --accent: #38bdf8; /* sky-400 */
  --accent-strong: #0ea5e9; /* sky-500 */
  --on-accent: #0f172a;

  /* Gantt semantic palette (from --tl-* tokens) */
  --leaf: #38bdf8;
  --parent-d0: #6366f1; /* indigo */
  --parent-d1: #10b981; /* emerald */
  --parent-d2: #06b6d4; /* cyan */
  --milestone: #f59e0b; /* amber */
  --critical: #d946ef; /* fuchsia */
  --today: #f43f5e; /* rose */

  --maxw: 1120px;
  --radius: 14px;
  --radius-sm: 9px;
  --font: ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, 'SFMono-Regular', 'Menlo', monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  background: var(--canvas);
  color: var(--text);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover {
  color: var(--accent-strong);
  text-decoration: underline;
}

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---- Header / nav ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(15, 23, 42, 0.82);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--border-soft);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 19px;
  letter-spacing: -0.01em;
  color: var(--text);
}
.brand:hover {
  text-decoration: none;
  color: var(--text);
}
.brand svg {
  display: block;
}
.brand b {
  color: var(--accent);
  font-weight: 700;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
}
.nav-links a {
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
}
.nav-links a:hover {
  color: var(--text);
  text-decoration: none;
}
.nav-links .btn {
  font-size: 15px;
}
@media (max-width: 720px) {
  .nav-links a:not(.btn) {
    display: none;
  }
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 16px;
  line-height: 1;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.12s ease, background 0.15s ease, border-color 0.15s ease;
}
.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}
.btn-primary {
  background: var(--accent);
  color: var(--on-accent);
}
.btn-primary:hover {
  background: var(--accent-strong);
  color: var(--on-accent);
}
.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}
.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--text);
}

/* ---- Hero ---- */
.hero {
  padding: 88px 0 64px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  /* subtle accent glow, on dark canvas */
  content: '';
  position: absolute;
  top: -160px;
  left: 50%;
  width: 760px;
  height: 420px;
  transform: translateX(-50%);
  background: radial-gradient(closest-side, rgba(56, 189, 248, 0.16), transparent);
  pointer-events: none;
  z-index: 0;
}
.hero .wrap {
  position: relative;
  z-index: 1;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.28);
  color: var(--accent);
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: 0.01em;
}
.eyebrow .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--parent-d1);
}
h1 {
  margin: 22px 0 0;
  font-size: clamp(34px, 5.4vw, 56px);
  line-height: 1.07;
  letter-spacing: -0.025em;
  font-weight: 800;
  max-width: 18ch;
}
h1 .grad {
  background: linear-gradient(95deg, var(--accent), var(--parent-d0));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.lede {
  margin: 22px 0 0;
  font-size: clamp(17px, 2.1vw, 20px);
  color: var(--text-secondary);
  max-width: 56ch;
}
.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}
.trust {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin-top: 28px;
  color: var(--text-muted);
  font-size: 14.5px;
}
.trust span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.trust svg {
  flex: none;
  color: var(--parent-d1);
}

/* ---- Showcase (SVG gantt mock) ---- */
.showcase {
  margin-top: 56px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: linear-gradient(180deg, #0b1220, #0f172a);
  box-shadow: 0 30px 80px -40px rgba(0, 0, 0, 0.8);
  overflow: hidden;
}
.showcase .chrome {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: #0b1220;
}
.showcase .chrome i {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--elevated);
}
.showcase .chrome .label {
  margin-left: 10px;
  font-size: 13px;
  color: var(--text-dim);
  font-family: var(--mono);
}
.showcase svg {
  display: block;
  width: 100%;
  height: auto;
}

/* ---- Sections ---- */
section.block {
  padding: 76px 0;
  border-top: 1px solid var(--border-soft);
}
.section-head {
  max-width: 60ch;
}
.kicker {
  color: var(--accent);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
h2 {
  margin: 12px 0 0;
  font-size: clamp(26px, 3.4vw, 36px);
  letter-spacing: -0.02em;
  font-weight: 800;
  line-height: 1.12;
}
.section-head p {
  margin: 14px 0 0;
  color: var(--text-secondary);
  font-size: 18px;
}

/* ---- Feature grid ---- */
.features {
  margin-top: 44px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
@media (max-width: 900px) {
  .features {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 600px) {
  .features {
    grid-template-columns: 1fr;
  }
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.card:hover {
  border-color: rgba(56, 189, 248, 0.4);
  transform: translateY(-2px);
}
.card .ico {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  margin-bottom: 16px;
  background: rgba(56, 189, 248, 0.12);
  color: var(--accent);
}
.card h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 15.5px;
  line-height: 1.6;
}

/* ---- Final CTA ---- */
.cta-band {
  margin: 0 auto;
  text-align: center;
}
.cta-band .inner {
  border: 1px solid rgba(56, 189, 248, 0.28);
  background: radial-gradient(120% 140% at 50% 0%, rgba(56, 189, 248, 0.12), transparent 60%), var(--surface);
  border-radius: 18px;
  padding: 56px 28px;
}
.cta-band h2 {
  max-width: 22ch;
  margin: 0 auto;
}
.cta-band p {
  margin: 14px auto 0;
  color: var(--text-secondary);
  max-width: 52ch;
  font-size: 18px;
}
.cta-band .cta-row {
  justify-content: center;
}

/* ---- Footer ---- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 44px 0 56px;
  color: var(--text-muted);
  font-size: 14.5px;
}
.footer-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 28px 48px;
  justify-content: space-between;
}
.footer-grid .col h4 {
  margin: 0 0 12px;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  font-weight: 700;
}
.footer-grid .col ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}
.footer-grid .col a {
  color: var(--text-secondary);
}
.footer-grid .col a:hover {
  color: var(--text);
}
.footer-bottom {
  margin-top: 36px;
  padding-top: 22px;
  border-top: 1px solid var(--border-soft);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: space-between;
  align-items: center;
  color: var(--text-dim);
  font-size: 13.5px;
}

/* ---- Legal / content pages ---- */
.legal {
  padding: 56px 0 72px;
}
.legal .wrap {
  max-width: 820px;
}
.legal .back {
  font-size: 14.5px;
  color: var(--text-muted);
}
.legal h1 {
  font-size: clamp(28px, 4vw, 40px);
  max-width: none;
  margin-top: 18px;
}
.legal .stand {
  color: var(--text-dim);
  font-size: 14.5px;
  margin-top: 6px;
}
.legal h2 {
  font-size: 22px;
  margin-top: 40px;
}
.legal h3 {
  font-size: 18px;
  margin-top: 28px;
  font-weight: 700;
}
.legal p,
.legal li {
  color: var(--text-secondary);
  font-size: 16px;
}
.legal ul,
.legal ol {
  padding-left: 22px;
}
.legal li {
  margin: 6px 0;
}
.legal address {
  font-style: normal;
  color: var(--text-secondary);
  line-height: 1.7;
}
.legal table {
  width: 100%;
  border-collapse: collapse;
  margin: 18px 0;
  font-size: 14.5px;
  display: block;
  overflow-x: auto;
}
.legal th,
.legal td {
  border: 1px solid var(--border);
  padding: 9px 12px;
  text-align: left;
  vertical-align: top;
  color: var(--text-secondary);
}
.legal th {
  background: var(--surface);
  color: var(--text);
  font-weight: 600;
}
.legal hr {
  border: none;
  border-top: 1px solid var(--border-soft);
  margin: 36px 0;
}
/* Inline code — shared across cards (N/L shortcuts) and legal pages. */
code {
  font-family: var(--mono);
  font-size: 0.9em;
  background: var(--elevated);
  padding: 1px 6px;
  border-radius: 5px;
  color: var(--text);
}

.skip-link {
  position: absolute;
  left: -9999px;
}
.skip-link:focus {
  left: 16px;
  top: 12px;
  z-index: 100;
  background: var(--surface);
  color: var(--text);
  padding: 8px 14px;
  border-radius: 8px;
  border: 1px solid var(--accent);
}