/* ==========================================================================
   TOSOVIC.AI — styles
   1. Design tokens   2. Base & reset   3. Utilities   4. Header & nav
   5. Hero            6. Sections & cards              7. Approach steps
   8. About           9. Fit            10. Contact    11. Footer
   12. Motion & reveal
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design tokens
   -------------------------------------------------------------------------- */
:root {
  /* light theme (default) */
  --bg: #f7f8fa;
  --bg-alt: #eff1f5;
  --surface: #ffffff;
  --text: #171b22;
  --muted: #4c5563;
  --border: #e2e5eb;
  --border-strong: #cdd2db;
  --accent: #1d4ed8;
  --accent-soft: rgba(29, 78, 216, 0.10);
  --on-accent: #ffffff;

  --diagram-dot: #d3d8e2;
  --diagram-line: #c4cbd8;
  --diagram-node: #aab3c4;
  --diagram-node-fill: #ffffff;
  --diagram-strong: #7a8598;

  --font-sans: "Inter", "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "Cascadia Code", "Cascadia Mono", Consolas, "SF Mono", Menlo, monospace;

  --radius: 14px;
  --radius-sm: 10px;
  --container: 1120px;
  --header-h: 4rem;
  --shadow-card: 0 1px 2px rgba(15, 20, 30, 0.04), 0 6px 24px -18px rgba(15, 20, 30, 0.25);

  color-scheme: light;
}

[data-theme="dark"] {
  --bg: #0b0e14;
  --bg-alt: #0e121b;
  --surface: #121722;
  --text: #e7ecf3;
  --muted: #9ba5b4;
  --border: #212a3a;
  --border-strong: #32405c;
  --accent: #7aa2f7;
  --accent-soft: rgba(122, 162, 247, 0.12);
  --on-accent: #0b0e14;

  --diagram-dot: #1d2432;
  --diagram-line: #2f3a54;
  --diagram-node: #46547a;
  --diagram-node-fill: #131a28;
  --diagram-strong: #55627a;

  --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 28px -20px rgba(0, 0, 0, 0.6);

  color-scheme: dark;
}

/* No-JS visitors: follow the system preference (data-theme is never set). */
@media (prefers-color-scheme: dark) {
  html:not([data-theme="light"]):not([data-theme="dark"]) {
    --bg: #0b0e14;
    --bg-alt: #0e121b;
    --surface: #121722;
    --text: #e7ecf3;
    --muted: #9ba5b4;
    --border: #212a3a;
    --border-strong: #32405c;
    --accent: #7aa2f7;
    --accent-soft: rgba(122, 162, 247, 0.12);
    --on-accent: #0b0e14;

    --diagram-dot: #1d2432;
    --diagram-line: #2f3a54;
    --diagram-node: #46547a;
    --diagram-node-fill: #131a28;
    --diagram-strong: #55627a;

    --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 28px -20px rgba(0, 0, 0, 0.6);

    color-scheme: dark;
  }
}

/* --------------------------------------------------------------------------
   2. Base & reset
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

* {
  margin: 0;
}

html {
  scroll-padding-top: calc(var(--header-h) + 1.25rem);
  -webkit-text-size-adjust: 100%;
}

/* Smooth in-page scrolling is enabled from js/main.js (motion-permitting)
   so that initial #fragment navigation stays a reliable instant jump. */

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

[hidden] {
  display: none !important;
}

h1,
h2,
h3 {
  line-height: 1.15;
  letter-spacing: -0.015em;
  font-weight: 700;
  text-wrap: balance;
}

h1 {
  font-size: clamp(2.1rem, 4.2vw + 0.9rem, 3.4rem);
}

h2 {
  font-size: clamp(1.55rem, 2.3vw + 0.75rem, 2.3rem);
}

h3 {
  font-size: 1.15rem;
  line-height: 1.35;
}

p {
  max-width: 65ch;
}

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

a:hover {
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

::selection {
  background: var(--accent);
  color: var(--on-accent);
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

button {
  font: inherit;
  color: inherit;
}

/* --------------------------------------------------------------------------
   3. Utilities
   -------------------------------------------------------------------------- */
.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 5vw, 2rem);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 100;
  padding: 0.6em 1em;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  font-weight: 600;
  transform: translateY(-300%);
}

.skip-link:focus {
  transform: none;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding: 0.72em 1.35em;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-weight: 600;
  font-size: 0.98rem;
  line-height: 1.2;
  cursor: pointer;
  transition: background-color 0.18s ease, border-color 0.18s ease, color 0.18s ease, transform 0.18s ease;
}

.btn:hover {
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: var(--on-accent);
}

.btn-primary:hover {
  background: color-mix(in srgb, var(--accent) 88%, var(--text));
}

.btn-ghost {
  border-color: var(--border-strong);
  color: var(--text);
  background: transparent;
}

.btn-ghost:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.btn-sm {
  padding: 0.55em 1em;
  font-size: 0.9rem;
}

.btn-block {
  width: 100%;
}

.link-cta {
  display: inline-block;
  margin-top: auto;
  font-weight: 600;
  font-size: 0.95rem;
}

.link-cta span {
  display: inline-block;
  transition: transform 0.18s ease;
}

.link-cta:hover span {
  transform: translateX(3px);
}

/* --------------------------------------------------------------------------
   4. Header & nav
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background-color 0.25s ease, border-color 0.25s ease;
}

.site-header.scrolled {
  background: var(--bg);
  background: color-mix(in srgb, var(--bg) 84%, transparent);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom-color: var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  min-height: var(--header-h);
}

.brand {
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.04em;
  color: var(--text);
}

.brand:hover {
  text-decoration: none;
}

.brand-ai {
  color: var(--accent);
}

.site-nav {
  margin-left: auto;
}

.site-nav ul {
  list-style: none;
  display: flex;
  align-items: center;
  gap: clamp(1rem, 1.8vw, 1.6rem);
  margin: 0;
  padding: 0;
}

.site-nav a:not(.btn) {
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 500;
}

.site-nav a:not(.btn):hover {
  color: var(--text);
  text-decoration: none;
}

.site-nav a[aria-current] {
  color: var(--accent);
}

.nav-cta {
  display: none;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.theme-toggle,
.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.4rem;
  height: 2.4rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: transparent;
  cursor: pointer;
  transition: border-color 0.18s ease, background-color 0.18s ease;
}

.theme-toggle:hover,
.nav-toggle:hover {
  border-color: var(--border-strong);
  background: var(--accent-soft);
}

/* show the icon of the theme you would switch to */
.icon-moon { display: block; }
.icon-sun { display: none; }
[data-theme="dark"] .icon-moon { display: none; }
[data-theme="dark"] .icon-sun { display: block; }

.nav-toggle {
  position: relative;
}

.burger,
.burger::before,
.burger::after {
  display: block;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: var(--text);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.burger::before,
.burger::after {
  content: "";
  position: absolute;
  left: 50%;
  margin-left: -8px;
}

.burger::before { transform: translateY(-7px); }
.burger::after { transform: translateY(5px); }

.nav-toggle[aria-expanded="true"] .burger {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] .burger::before {
  transform: translateY(-1px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .burger::after {
  transform: translateY(-1px) rotate(-45deg);
}

/* Mobile: collapsible panel (JS) */
@media (max-width: 979.98px) {
  .header-cta {
    display: none;
  }

  .js .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-card);
    padding: 0.75rem 0 1.25rem;
  }

  .js.nav-open .site-nav {
    display: block;
  }

  .site-nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding-inline: clamp(1.25rem, 5vw, 2rem);
  }

  .site-nav li a:not(.btn) {
    display: block;
    padding: 0.7rem 0;
    font-size: 1.05rem;
  }

  .nav-cta {
    display: block;
    padding-top: 0.9rem;
  }

  .nav-cta .btn {
    width: 100%;
  }

  /* No-JS mobile fallback: nav stays visible as a compact wrapping row */
  .no-js .site-nav ul {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.25rem 1rem;
    padding-inline: 0;
    padding-bottom: 0.6rem;
  }

  .no-js .header-inner {
    flex-wrap: wrap;
    padding-top: 0.6rem;
  }

  .no-js .nav-cta {
    display: none;
  }
}

@media (min-width: 980px) {
  .nav-toggle {
    display: none;
  }
}

.no-js .nav-toggle,
.no-js .theme-toggle {
  display: none;
}

/* --------------------------------------------------------------------------
   5. Hero
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  padding-block: clamp(3.5rem, 9vw, 7rem) clamp(4rem, 9vw, 7.5rem);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(620px 420px at 78% 12%, var(--accent-soft), transparent 70%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

.hero-lead {
  margin-top: 1.25rem;
  font-size: clamp(1.05rem, 0.6vw + 0.95rem, 1.2rem);
  color: var(--muted);
}

.hero-subline {
  margin-top: 1.1rem;
  font-weight: 600;
  font-size: 1.02rem;
  border-left: 2px solid var(--accent);
  padding-left: 0.75rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

.hero-trust {
  margin-top: 1.75rem;
  font-size: 0.9rem;
  color: var(--muted);
  border-top: 1px solid var(--border);
  padding-top: 1.25rem;
  max-width: 46ch;
}

.hero-visual {
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) + 4px);
  background:
    linear-gradient(180deg, var(--surface), transparent 78%);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.hero-diagram {
  width: 100%;
  height: auto;
}

/* diagram parts */
.dg { fill: var(--diagram-dot); }

.edges path {
  stroke: var(--diagram-line);
  stroke-width: 1.4;
  fill: none;
}

.edge-d {
  stroke-dasharray: 3 6;
}

.nodes rect,
.nodes circle {
  fill: var(--diagram-node-fill);
  stroke: var(--diagram-node);
  stroke-width: 1.4;
}

.hub rect {
  fill: var(--diagram-node-fill);
  stroke: var(--diagram-strong);
  stroke-width: 1.6;
}

.hub line {
  stroke: var(--diagram-strong);
  stroke-width: 2;
  stroke-linecap: round;
  opacity: 0.75;
}

.sig {
  stroke: var(--accent);
  stroke-width: 2;
  stroke-linecap: round;
  fill: none;
  stroke-dasharray: 9 13;
}

.out .dot {
  fill: var(--accent);
}

.out .ring {
  fill: none;
  stroke: var(--accent);
  stroke-width: 1.6;
  opacity: 0.35;
  transform-box: fill-box;
  transform-origin: center;
}

@media (max-width: 959.98px) {
  .hero-inner {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    max-width: 480px;
  }
}

@media (max-width: 639.98px) {
  .d2 {
    display: none; /* simplify the diagram on small screens */
  }
}

/* --------------------------------------------------------------------------
   6. Sections & cards
   -------------------------------------------------------------------------- */
.section {
  padding-block: clamp(4rem, 8.5vw, 7rem);
}

.section-alt {
  background: var(--bg-alt);
  border-block: 1px solid var(--border);
}

.section-head {
  max-width: 46rem;
  margin-bottom: clamp(2.25rem, 5vw, 3.5rem);
}

.section-lead {
  margin-top: 1rem;
  color: var(--muted);
  font-size: 1.05rem;
}

.cards-3,
.cards-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 700px) {
  .cards-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 700px) and (max-width: 999.98px) {
  .cards-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1000px) {
  .cards-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

.card {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.6rem 1.5rem;
  box-shadow: var(--shadow-card);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.card:hover {
  border-color: color-mix(in srgb, var(--accent) 38%, var(--border));
  transform: translateY(-2px);
}

.card-num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  margin-bottom: 0.9rem;
}

.card h3 {
  margin-bottom: 0.6rem;
}

.card > p:not(.card-num):not(.list-label) {
  color: var(--muted);
  font-size: 0.97rem;
}

.list-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-top: 1.4rem;
  margin-bottom: 0.5rem;
}

.card-service ul {
  list-style: none;
  padding: 0;
  margin: 0 0 1.4rem;
}

.card-service li {
  position: relative;
  padding-left: 1.1rem;
  font-size: 0.94rem;
  color: var(--muted);
  padding-block: 0.18rem;
}

.card-service li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.75em;
  width: 5px;
  height: 5px;
  border-radius: 1px;
  background: var(--accent);
  opacity: 0.65;
}

/* Expertise chips */
.card-expertise h3 {
  margin-bottom: 1rem;
}

.chips {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0;
  margin: 0;
}

.chips li {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--muted);
  border: 1px solid var(--border);
  background: var(--bg);
  border-radius: 999px;
  padding: 0.32em 0.75em;
  white-space: nowrap;
}

@media (max-width: 480px) {
  .chips li {
    white-space: normal;
  }
}

/* Statements */
.statement {
  margin: clamp(2.5rem, 6vw, 4rem) auto 0;
  max-width: 44rem;
  text-align: center;
  font-size: clamp(1.2rem, 1.4vw + 0.9rem, 1.55rem);
  line-height: 1.45;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--muted);
  text-wrap: balance;
}

.statement strong {
  color: var(--text);
  font-weight: 700;
}

/* --------------------------------------------------------------------------
   7. Approach steps
   -------------------------------------------------------------------------- */
.steps {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  position: relative;
  counter-reset: step;
}

.steps::before {
  content: "";
  position: absolute;
  left: 1.25rem;
  top: 1.5rem;
  bottom: 1.5rem;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--border-strong) 12%, var(--border-strong) 88%, transparent);
}

.step {
  position: relative;
  padding-left: 3.6rem;
}

.step-num {
  position: absolute;
  left: 0;
  top: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
}

.step h3 {
  margin-bottom: 0.4rem;
}

.step p {
  color: var(--muted);
  font-size: 0.97rem;
}

@media (min-width: 880px) {
  .steps {
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
  }

  .steps::before {
    left: 1.25rem;
    right: 1.25rem;
    top: 1.25rem;
    bottom: auto;
    width: auto;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-strong) 6%, var(--border-strong) 94%, transparent);
  }

  .step {
    padding-left: 0;
    padding-top: 3.6rem;
  }
}

/* --------------------------------------------------------------------------
   8. About
   -------------------------------------------------------------------------- */
.about-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}

@media (min-width: 880px) {
  .about-inner {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }
}

.about-copy h2 {
  margin-bottom: 1.25rem;
}

.about-copy p + p {
  margin-top: 0.9rem;
}

.about-copy p {
  color: var(--muted);
}

.about-points {
  list-style: none;
  padding: 0;
  margin: 1.75rem 0 0;
  border-top: 1px solid var(--border);
}

.about-points li {
  position: relative;
  padding: 0.65rem 0 0.65rem 1.6rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.97rem;
}

.about-points li::before {
  content: "";
  position: absolute;
  left: 0.15rem;
  top: 1.15em;
  width: 0.55rem;
  height: 1px;
  background: var(--accent);
}

.about-portrait {
  max-width: 340px;
  width: 100%;
  justify-self: center;
}

@media (min-width: 880px) {
  .about-portrait {
    justify-self: end;
  }
}

.portrait {
  aspect-ratio: 4 / 5;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--surface), var(--bg-alt));
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.portrait img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.portrait-caption {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  margin-top: 0.9rem;
  text-align: center;
}

.portrait-name {
  font-weight: 600;
}

.portrait-role {
  font-size: 0.82rem;
  color: var(--muted);
}

/* --------------------------------------------------------------------------
   9. Fit
   -------------------------------------------------------------------------- */
.fit-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-top: 1rem;
}

@media (min-width: 880px) {
  .fit-grid {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: start;
  }
}

.fit-panel {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 1.75rem 1.6rem;
  box-shadow: var(--shadow-card);
}

.fit-panel h2,
.fit-panel h3 {
  margin-bottom: 1rem;
}

.fit-panel h3 {
  font-size: 1.3rem;
}

.fit-panel ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.fit-panel li {
  position: relative;
  padding: 0.45rem 0 0.45rem 1.9rem;
  color: var(--muted);
  font-size: 0.98rem;
}

.fit-panel li::before {
  position: absolute;
  left: 0;
  top: 0.42rem;
  font-family: var(--font-mono);
  font-size: 0.95rem;
}

.fit-yes li::before {
  content: "\2713"; /* ✓ */
  color: var(--accent);
}

.fit-no {
  background: transparent;
  box-shadow: none;
}

.fit-no li::before {
  content: "\2013"; /* – */
  color: var(--muted);
  opacity: 0.7;
}

/* --------------------------------------------------------------------------
   9b. Shared context section
   -------------------------------------------------------------------------- */
.context-frame {
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) + 6px);
  padding: clamp(1.5rem, 4.5vw, 3rem);
  box-shadow: var(--shadow-card);
  background-image:
    radial-gradient(640px 340px at 85% 0%, var(--accent-soft), transparent 72%),
    radial-gradient(var(--diagram-dot) 1px, transparent 1.5px);
  background-size: auto, 24px 24px;
}

.context-frame .section-head {
  margin-bottom: 2rem;
}

.ctx-diagram {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 44px minmax(0, 1.15fr) 44px minmax(0, 1fr);
  align-items: center;
  gap: 0.9rem;
  margin: 2.5rem auto;
  max-width: 62rem;
}

.ctx-col {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.ctx-chip {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 8px;
  padding: 0.45em 0.7em;
  text-align: center;
}

.ctx-chip-agent {
  border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
  color: var(--accent);
}

.ctx-core {
  border: 1.5px solid var(--accent);
  background: var(--accent-soft);
  border-radius: 14px;
  padding: 1.4rem 1rem;
  text-align: center;
}

.ctx-core-title {
  display: block;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.ctx-core-sub {
  display: block;
  margin-top: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--accent);
}

.ctx-flow {
  position: relative;
  height: 2px;
  border-radius: 1px;
  background: linear-gradient(90deg, var(--border-strong), var(--accent));
}

.ctx-flow::after {
  content: "";
  position: absolute;
  right: -1px;
  top: 50%;
  transform: translateY(-50%);
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
  border-left: 7px solid var(--accent);
  border-right: 0;
}

@media (max-width: 819.98px) {
  .ctx-diagram {
    grid-template-columns: 1fr;
    gap: 0.9rem;
  }

  .ctx-col {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.45rem;
  }

  .ctx-core {
    max-width: 22rem;
    margin-inline: auto;
    width: 100%;
  }

  .ctx-flow {
    width: 2px;
    height: 30px;
    margin-inline: auto;
    background: linear-gradient(180deg, var(--border-strong), var(--accent));
  }

  .ctx-flow::after {
    right: auto;
    top: auto;
    bottom: -1px;
    left: 50%;
    transform: translateX(-50%);
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 7px solid var(--accent);
    border-bottom: 0;
  }
}

.ctx-benefits {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-top: 2.25rem;
}

@media (min-width: 700px) {
  .ctx-benefits {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.ctx-benefit {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem;
}

.ctx-benefit h3 {
  font-size: 1.02rem;
  margin-bottom: 0.4rem;
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

.ctx-benefit h3::before {
  content: "";
  flex: none;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--accent);
  opacity: 0.8;
}

.ctx-benefit p {
  color: var(--muted);
  font-size: 0.94rem;
}

.context-frame .statement {
  margin-top: 2.75rem;
}

/* --------------------------------------------------------------------------
   10. Contact
   -------------------------------------------------------------------------- */
.section-contact {
  position: relative;
  overflow: hidden;
}

.section-contact::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(720px 380px at 22% 0%, var(--accent-soft), transparent 72%);
  pointer-events: none;
}

.contact-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2.5rem, 5vw, 4rem);
  align-items: start;
}

@media (min-width: 920px) {
  .contact-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 420px);
  }
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

.contact-direct {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
  margin-top: 2rem;
  font-size: 0.95rem;
}

.contact-direct-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.contact-email {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 500;
}

.copy-btn {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.3em 0.8em;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: border-color 0.18s ease, color 0.18s ease;
}

.copy-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.copy-btn.copied {
  border-color: var(--accent);
  color: var(--accent);
}

.contact-form-wrap {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  padding: 1.75rem 1.6rem;
}

.field {
  margin-bottom: 1.1rem;
}

.field label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.field .optional {
  font-weight: 400;
  color: var(--muted);
}

.field input,
.field textarea {
  width: 100%;
  font: inherit;
  font-size: 1rem;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 0.6em 0.8em;
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.field textarea {
  resize: vertical;
  min-height: 7rem;
}

.field input::placeholder,
.field textarea::placeholder {
  color: var(--muted);
  opacity: 0.7;
}

.field input:focus-visible,
.field textarea:focus-visible {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.form-hint {
  margin-top: 0.9rem;
  font-size: 0.82rem;
  color: var(--muted);
}

.form-note {
  margin-top: 0.9rem;
  font-size: 0.88rem;
  padding: 0.7em 0.9em;
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 6px;
  background: var(--bg);
}

/* --------------------------------------------------------------------------
   11. Footer
   -------------------------------------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding-block: 2.75rem 2rem;
  font-size: 0.92rem;
}

.footer-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 2rem;
}

.footer-descriptor {
  color: var(--muted);
  margin-top: 0.35rem;
}

.footer-statement {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  margin-top: 0.9rem;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  text-align: right;
}

.footer-links a {
  color: var(--muted);
}

.footer-links a:hover {
  color: var(--accent);
}

.footer-copy {
  margin-top: 2.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.85rem;
}

@media (max-width: 560px) {
  .footer-links {
    text-align: left;
  }
}

/* --------------------------------------------------------------------------
   12. Motion & reveal
   -------------------------------------------------------------------------- */
/* Reveal state is only applied when JS confirms motion is allowed. */
.reveal-ready .reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal-ready .reveal.in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: no-preference) {
  .sig {
    animation: dash-drift 7s linear infinite;
  }

  .out .ring {
    animation: ring-pulse 3.4s ease-in-out infinite;
  }
}

@keyframes dash-drift {
  to {
    stroke-dashoffset: -88;
  }
}

@keyframes ring-pulse {
  0%, 100% {
    opacity: 0.3;
    transform: scale(1);
  }
  50% {
    opacity: 0.55;
    transform: scale(1.18);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}