/* ============================================================
   Vantis Project Intelligence — vantispi.com
   Design tokens & shared styles
   ============================================================ */

:root {
  /* Colour */
  --paper: #f4f6fa;
  --paper-raised: #ffffff;
  --ink: #0b1524;
  --ink-soft: #44536a;
  --ink-faint: #5b6b82;
  --line: #dbe2ee;
  --dark: #0b1524;
  --dark-panel: #122036;
  --dark-line: #24334e;
  --dark-text: #eaf0f8;
  --dark-text-soft: #9fb2cc;
  --blue: #1e63d6;
  --blue-bright: #6db2ff;
  --crit: #d6453d;
  --amber: #f6b33d;

  /* Theme-scoped graphic tokens */
  --sweep-a: #123a7a;
  --sweep-b: #2b7cf0;
  --grid-line: rgba(11, 21, 36, 0.035);
  --fig-grid: #e3e9f2;
  --fig-bar: #cbd5e3;
  --fig-label: #8a97ab;
  --fig-text: #44536a;

  /* Type */
  --font-display: "Poppins", "Helvetica Neue", Arial, sans-serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;

  --size-hero: clamp(2.4rem, 5.4vw, 4.2rem);
  --size-h2: clamp(1.7rem, 3.2vw, 2.5rem);
  --size-h3: clamp(1.2rem, 2vw, 1.5rem);

  --wrap: 1120px;
  --pad: clamp(1.25rem, 4vw, 2.5rem);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }

a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
  border-radius: 2px;
}

.wrap { max-width: var(--wrap); margin: 0 auto; padding-inline: var(--pad); }

/* ---------- Typography ---------- */

h1, h2, h3 { font-family: var(--font-display); line-height: 1.12; letter-spacing: -0.015em; }
h1 { font-size: var(--size-hero); font-weight: 700; }
h2 { font-size: var(--size-h2); font-weight: 700; }
h3 { font-size: var(--size-h3); font-weight: 600; }

.lede { font-size: clamp(1.1rem, 1.8vw, 1.3rem); color: var(--ink-soft); max-width: 46ch; }

/* Activity-ID eyebrow — sections are labelled like schedule activities */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--blue);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1.1rem;
}
.eyebrow::after { content: ""; height: 1px; width: 3.5rem; background: currentColor; opacity: 0.45; }
.on-dark .eyebrow { color: var(--blue-bright); }

/* Milestone diamond marker */
.diamond {
  display: inline-block;
  width: 9px; height: 9px;
  background: var(--blue);
  transform: rotate(45deg);
  flex: none;
}
.diamond--amber { background: var(--amber); }

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 64px;
}

.logo {
  display: flex;
  align-items: baseline;
  gap: 0.55rem;
  color: var(--ink);
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.18rem;
  letter-spacing: -0.01em;
}
.logo { --arm1: #123a7a; --arm2: #2b7cf0; }
.site-footer .logo, .on-dark .logo { --arm1: #3e78c6; --arm2: #6db2ff; }
.logo:hover { text-decoration: none; }
.logo-mark { width: 27px; height: 27px; align-self: center; flex: none; }
.logo small {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.6rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.site-nav { display: flex; align-items: center; gap: 1.6rem; }
.site-nav a {
  color: var(--ink-soft);
  font-size: 0.95rem;
  font-weight: 500;
}
.site-nav a:hover { color: var(--ink); text-decoration: none; }
.site-nav a[aria-current="page"] { color: var(--ink); }
.site-nav a[aria-current="page"]:not(.btn) { box-shadow: 0 2px 0 var(--blue); }

.site-nav a.btn--primary,
.site-nav a.btn--primary:hover,
.site-nav a.btn--primary[aria-current="page"] {
  color: var(--paper-raised);
  box-shadow: none;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.45rem 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--ink);
  cursor: pointer;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.98rem;
  padding: 0.7rem 1.35rem;
  border-radius: 8px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 120ms ease, box-shadow 120ms ease, background 120ms ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }

.btn--primary { background: var(--ink); color: var(--paper-raised); }
.btn--primary:hover { box-shadow: 0 6px 18px rgba(11, 21, 36, 0.25); }
.btn--ghost { border-color: var(--line); color: var(--ink); background: transparent; }
.btn--ghost:hover { border-color: var(--ink-faint); }

.on-dark .btn--primary { background: var(--blue-bright); color: var(--dark); }
.on-dark .btn--primary:hover { box-shadow: 0 6px 22px rgba(109, 178, 255, 0.3); }
.on-dark .btn--ghost { border-color: var(--dark-line); color: var(--dark-text); }
.on-dark .btn--ghost:hover { border-color: var(--dark-text-soft); }

/* ---------- Sections ---------- */

.section { padding-block: clamp(3.5rem, 8vw, 6.5rem); }
.section--tight { padding-block: clamp(2.25rem, 5vw, 3.5rem); }

.on-dark {
  background: var(--dark);
  color: var(--dark-text);
}
.on-dark h1, .on-dark h2, .on-dark h3 { color: #ffffff; }
.on-dark .lede { color: var(--dark-text-soft); }
.on-dark a { color: var(--blue-bright); }

.section-head { max-width: 62ch; margin-bottom: clamp(2rem, 4vw, 3.25rem); }
.section-head p { color: var(--ink-soft); margin-top: 0.9rem; }
.on-dark .section-head p { color: var(--dark-text-soft); }

/* ---------- Hero ---------- */

.hero { padding-block: clamp(3.5rem, 8vw, 6rem) clamp(3rem, 7vw, 5.5rem); overflow: hidden; }
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
}
.hero .lede { margin-top: 1.3rem; }
.hero-ctas { display: flex; flex-wrap: wrap; gap: 0.85rem; margin-top: 2.1rem; }
.hero-note {
  margin-top: 1.4rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--ink-faint);
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

/* Gantt hero figure */
.gantt-fig {
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1.1rem 1.2rem 1.3rem;
  box-shadow: 0 18px 50px rgba(11, 21, 36, 0.09);
}
.gantt-fig figcaption {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.85rem;
}

/* Bar draw-in animation (hooked by .is-in) */
.gantt-fig .bar { transform: scaleX(0); transform-origin: left center; }
.gantt-fig.is-in .bar { animation: bar-in 700ms cubic-bezier(0.22, 1, 0.36, 1) forwards; }
.gantt-fig.is-in .crit-line { stroke-dasharray: 620; stroke-dashoffset: 620; animation: dash-in 1100ms 650ms ease-out forwards; }
.gantt-fig.is-in .crit-ms { opacity: 0; animation: pop-in 350ms 1600ms ease-out forwards; }

@keyframes bar-in { to { transform: scaleX(1); } }
@keyframes dash-in { to { stroke-dashoffset: 0; } }
@keyframes pop-in { to { opacity: 1; } }

/* ---------- Hero modern animation ---------- */

.hero { position: relative; }
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 90% 80% at 60% 20%, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 90% 80% at 60% 20%, black 30%, transparent 75%);
  pointer-events: none;
}
.hero::after {
  content: "";
  position: absolute;
  top: -12rem; right: -10rem;
  width: 34rem; height: 34rem;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(109, 178, 255, 0.18), transparent 65%);
  filter: blur(20px);
  animation: orb-drift 14s ease-in-out infinite alternate;
  pointer-events: none;
}
.hero .wrap { position: relative; }

@keyframes orb-drift {
  from { transform: translate(0, 0) scale(1); }
  to { transform: translate(-4rem, 3rem) scale(1.12); }
}

/* Masked line reveal for the headline */
.line-mask { display: block; overflow: hidden; }
.line-mask > span {
  display: block;
  transform: translateY(110%);
  animation: line-rise 850ms cubic-bezier(0.22, 1, 0.36, 1) forwards;
}
.line-mask:nth-child(1) > span { animation-delay: 80ms; }
.line-mask:nth-child(2) > span { animation-delay: 200ms; }
.line-mask:nth-child(3) > span { animation-delay: 320ms; }

@keyframes line-rise { to { transform: translateY(0); } }

.accent-sweep {
  background: linear-gradient(100deg, var(--sweep-a) 0%, var(--sweep-b) 45%, var(--sweep-a) 90%);
  background-size: 200% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  animation: sweep 5s ease-in-out 1.4s infinite;
}
@keyframes sweep {
  0%, 100% { background-position: 0% 0; }
  50% { background-position: 100% 0; }
}

.rise { opacity: 0; transform: translateY(16px); animation: rise-in 700ms cubic-bezier(0.22, 1, 0.36, 1) forwards; }
.rise-1 { animation-delay: 480ms; }
.rise-2 { animation-delay: 640ms; }
.rise-3 { animation-delay: 800ms; }
@keyframes rise-in { to { opacity: 1; transform: none; } }

.hero .gantt-fig { animation: fig-in 900ms 350ms cubic-bezier(0.22, 1, 0.36, 1) both; }
@keyframes fig-in {
  from { opacity: 0; transform: translateY(26px) scale(0.97); }
  to { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: reduce) {
  .hero::after { animation: none; }
  .line-mask > span { transform: none; animation: none; }
  .accent-sweep { animation: none; }
  .rise { opacity: 1; transform: none; animation: none; }
  .hero .gantt-fig { animation: none; }
}

/* ---------- Cards & grids ---------- */

.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.25rem; }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.25rem; }

.card {
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1.6rem 1.5rem;
  transition: transform 140ms ease, box-shadow 140ms ease;
}
.card:hover { transform: translateY(-3px); box-shadow: 0 12px 30px rgba(11, 21, 36, 0.08); }
.card h3 { margin-bottom: 0.6rem; display: flex; align-items: center; gap: 0.6rem; }
.card p { color: var(--ink-soft); font-size: 0.98rem; }

.on-dark .card { background: var(--dark-panel); border-color: var(--dark-line); }
.on-dark .card p { color: var(--dark-text-soft); }
.on-dark .card:hover { box-shadow: 0 12px 30px rgba(0, 0, 0, 0.45); }

/* Sector strip */
.sector-strip {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--paper-raised);
}
.sector-strip .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem 2rem;
  padding-block: 1.1rem;
}
.sector-strip span {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
  display: flex;
  align-items: center;
  gap: 0.7rem;
}
.sector-strip .diamond { width: 7px; height: 7px; }

/* ---------- Product panels ---------- */

.product-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
  padding-block: clamp(2.5rem, 5vw, 4rem);
}
.product-panel + .product-panel { border-top: 1px solid var(--dark-line); }
.product-panel.flip .product-media { order: -1; }

.product-kicker {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--blue-bright);
  margin-bottom: 0.8rem;
}
.product-panel h3, .product-panel h2 { font-size: clamp(1.6rem, 2.8vw, 2.1rem); }
.product-panel .desc { color: var(--dark-text-soft); margin-top: 0.85rem; max-width: 50ch; }

.feature-list { list-style: none; margin-top: 1.35rem; display: grid; gap: 0.55rem; }
.feature-list li {
  display: flex;
  gap: 0.7rem;
  align-items: baseline;
  font-size: 0.95rem;
  color: var(--dark-text);
}
.feature-list .diamond { width: 7px; height: 7px; background: var(--blue-bright); transform: rotate(45deg) translateY(-1px); }
.feature-list li span:last-child { color: var(--dark-text-soft); }
.feature-list li strong { color: var(--dark-text); font-weight: 600; }

.product-ctas { display: flex; flex-wrap: wrap; gap: 0.8rem; margin-top: 1.7rem; }

.product-media {
  background: var(--dark-panel);
  border: 1px solid var(--dark-line);
  border-radius: 12px;
  padding: 1.1rem;
}
.product-media figcaption {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dark-text-soft);
  margin-bottom: 0.8rem;
  display: flex;
  justify-content: space-between;
}

/* Light-page variant (products.html) */
.product-panel--light .product-kicker { color: var(--blue); }
.product-panel--light .desc { color: var(--ink-soft); }
.product-panel--light .feature-list li { color: var(--ink); }
.product-panel--light .feature-list li span:last-child { color: var(--ink-soft); }
.product-panel--light .feature-list .diamond { background: var(--blue); }
.product-panel--light .feature-list li strong { color: var(--ink); }
.product-panel--light + .product-panel--light { border-top: 1px solid var(--line); }
.product-panel--light .product-media { background: var(--dark); border-color: var(--dark-line); }

/* ---------- CTA band ---------- */

.cta-band { text-align: center; }
.cta-band h2 { max-width: 22ch; margin-inline: auto; }
.cta-band p { color: var(--dark-text-soft); margin-top: 1rem; max-width: 52ch; margin-inline: auto; }
.cta-band .hero-ctas { justify-content: center; }

/* ---------- Prose / detail lists ---------- */

.prose { max-width: 68ch; }
.prose p + p { margin-top: 1.1rem; }
.prose h3 { margin-top: 2.2rem; margin-bottom: 0.7rem; }

.def-list { display: grid; gap: 1.1rem; margin-top: 1.5rem; }
.def-list > div {
  border-left: 2px solid var(--blue);
  padding-left: 1.1rem;
}
.def-list strong { font-family: var(--font-display); font-weight: 600; display: block; margin-bottom: 0.2rem; }
.def-list p { color: var(--ink-soft); font-size: 0.97rem; }

/* ---------- Forms ---------- */

.form-grid { display: grid; gap: 1.1rem; max-width: 560px; }
.form-grid label {
  display: grid;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.form-grid input, .form-grid select, .form-grid textarea {
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--ink);
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.75rem 0.9rem;
}
.form-grid input:focus, .form-grid select:focus, .form-grid textarea:focus {
  outline: 2px solid var(--blue);
  outline-offset: 1px;
  border-color: var(--blue);
}
.form-grid textarea { min-height: 150px; resize: vertical; }

/* ---------- Footer ---------- */

.site-footer {
  background: var(--dark);
  color: var(--dark-text-soft);
  padding-block: clamp(2.5rem, 5vw, 4rem) 1.75rem;
  font-size: 0.92rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2rem;
  padding-bottom: 2.25rem;
  border-bottom: 1px solid var(--dark-line);
}
.site-footer .logo { color: #fff; margin-bottom: 0.8rem; }
.site-footer .logo small { color: var(--dark-text-soft); }
.site-footer h4 {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--dark-text-soft);
  margin-bottom: 0.85rem;
}
.site-footer ul { list-style: none; display: grid; gap: 0.5rem; }
.site-footer a { color: var(--dark-text); font-weight: 400; }
.site-footer a:hover { color: var(--blue-bright); text-decoration: none; }
.footer-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem 2rem;
  padding-top: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
}

/* ---------- Scroll reveal ---------- */

.reveal { opacity: 0; transform: translateY(18px); transition: opacity 600ms ease, transform 600ms ease; }
.reveal.is-in { opacity: 1; transform: none; }

/* ---------- Utility ---------- */

.mono-note {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--ink-faint);
}
.on-dark .mono-note { color: var(--dark-text-soft); }

.center { text-align: center; }

/* ---------- Responsive ---------- */

@media (max-width: 880px) {
  .hero-grid, .product-panel, .grid-3, .grid-2, .footer-grid { grid-template-columns: 1fr; }
  .product-panel.flip .product-media { order: 0; }

  .nav-toggle { display: inline-flex; }
  .site-nav {
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--paper-raised);
    border-bottom: 1px solid var(--line);
    display: none;
    padding: 0.5rem 0 1rem;
  }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 0.8rem var(--pad); }
  .site-nav a[aria-current="page"]:not(.btn) { box-shadow: none; color: var(--blue); }
  .site-nav .btn { margin: 0.6rem var(--pad) 0; justify-content: center; }
}

/* ---------- Reduced motion ---------- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .gantt-fig .bar { transform: none; animation: none !important; }
  .gantt-fig.is-in .crit-line { stroke-dasharray: none; stroke-dashoffset: 0; animation: none; }
  .gantt-fig.is-in .crit-ms { opacity: 1; animation: none; }
  .btn, .card { transition: none; }
}

/* ---------- Theme toggle ---------- */

.theme-toggle {
  background: none;
  border: 1px solid var(--line);
  border-radius: 8px;
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  line-height: 1;
  color: var(--ink);
  cursor: pointer;
  flex: none;
}
.theme-toggle:hover { border-color: var(--ink-faint); }
.site-nav { margin-left: auto; }

@media (max-width: 880px) {
  .nav-toggle { margin-left: auto; }
  .site-nav { margin-left: 0; }
}

/* ---------- Dark theme ---------- */

[data-theme="dark"] {
  --paper: #0b1524;
  --paper-raised: #122036;
  --ink: #eaf0f8;
  --ink-soft: #b6c4d8;
  --ink-faint: #8a9cb5;
  --line: #24334e;
  --blue: #6db2ff;
  --sweep-a: #6db2ff;
  --sweep-b: #bcdaff;
  --grid-line: rgba(234, 240, 248, 0.045);
  --fig-grid: #24334e;
  --fig-bar: #3a4a63;
  --fig-label: #8a9cb5;
  --fig-text: #9fb2cc;
}
[data-theme="dark"] .logo { --arm1: #3e78c6; --arm2: #6db2ff; }
[data-theme="dark"] .on-dark { background: #081020; }
[data-theme="dark"] .site-footer { background: #081020; }
[data-theme="dark"] .gantt-fig { box-shadow: 0 18px 50px rgba(0, 0, 0, 0.4); }
[data-theme="dark"] .card:hover { box-shadow: 0 12px 30px rgba(0, 0, 0, 0.45); }
[data-theme="dark"] .hero::after { background: radial-gradient(circle, rgba(109, 178, 255, 0.13), transparent 65%); }
[data-theme="dark"] .btn--primary { background: var(--blue-bright); color: #0b1524; }
[data-theme="dark"] .btn--primary:hover { box-shadow: 0 6px 22px rgba(109, 178, 255, 0.3); }
[data-theme="dark"] .site-nav a.btn--primary { color: #0b1524; }