/* ==========================================================================
   Design tokens — "Graphite & Cloud Dancer" (see .claude/CLAUDE.md)
   ========================================================================== */
:root {
  --color-bg:          #111316;
  --color-surface:     #1A1D22;
  --color-border:      #2A2E35;
  --color-text:        #F0EEE9;
  --color-text-muted:  #A6A9B0;
  --color-primary:     #2EC4B6;
  --color-secondary:   #8FB3D9;
  --color-accent:      #FF6B5E;
  --color-accent-deep: #7A2E3B;

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

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2.5rem;
  --space-6: 4rem;
  --space-7: 6rem;

  --radius: 0.75rem;
  --container: 70rem;
  --header-h: 4rem;
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
}

/* ==========================================================================
   Base
   ========================================================================== */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  color-scheme: dark;
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

h1, h2, h3 {
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 var(--space-3);
  text-wrap: balance;
}

h2 { font-size: clamp(1.75rem, 1.2rem + 2vw, 2.5rem); }
h3 { font-size: 1.25rem; }

p { margin: 0 0 var(--space-3); }

a {
  color: var(--color-primary);
  text-underline-offset: 0.2em;
}

a:hover { color: var(--color-secondary); }

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

img { max-width: 100%; height: auto; display: block; }

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  top: var(--space-2);
  left: var(--space-2);
  z-index: 100;
  padding: var(--space-2) var(--space-3);
  background: var(--color-primary);
  color: var(--color-bg);
  border-radius: var(--radius);
  font-weight: 600;
  transform: translateY(-200%);
}

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

.container {
  width: min(100% - 2rem, var(--container));
  margin-inline: auto;
}

/* ==========================================================================
   Buttons, tags, badge
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  padding: 0.65rem 1.4rem;
  border: 2px solid transparent;
  border-radius: 999px;
  font: inherit;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.2s, border-color 0.2s, color 0.2s, transform 0.2s var(--ease);
}

.btn:hover { transform: translateY(-1px); }

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

.btn-primary:hover {
  background: var(--color-secondary);
  color: var(--color-bg);
}

.btn-secondary {
  border-color: var(--color-secondary);
  color: var(--color-secondary);
}

.btn-secondary:hover {
  background: var(--color-secondary);
  color: var(--color-bg);
}

.btn-sm {
  min-height: 2.5rem;
  padding: 0.4rem 1.1rem;
  font-size: 0.9375rem;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: 0 0 var(--space-3);
  padding: 0;
  list-style: none;
}

.tags li {
  padding: 0.15rem 0.7rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  color: var(--color-secondary);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.3rem 0.85rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-surface);
  color: var(--color-accent);
  font-size: 0.875rem;
  font-weight: 600;
}

.badge-dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 0 0.25rem color-mix(in srgb, var(--color-accent) 25%, transparent);
}

.eyebrow {
  margin-bottom: var(--space-2);
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ==========================================================================
   Header / nav
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--color-bg) 85%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  min-height: var(--header-h);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--color-text);
  text-decoration: none;
}

.logo:hover { color: var(--color-text); }

.logo-text {
  font-size: 0.9375rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.logo-text span { color: var(--color-primary); }

.site-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-4);
}

.site-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav ul a {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  text-decoration: none;
}

.site-nav ul a:hover,
.site-nav ul a[aria-current="true"] { color: var(--color-text); }

.nav-toggle { display: none; }

/* Mobile menu collapses only when JS is available to open it */
@media (max-width: 47.99rem) {
  .js .nav-toggle {
    display: inline-grid;
    place-items: center;
    width: 2.75rem;
    height: 2.75rem;
    padding: 0;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-surface);
    color: var(--color-text);
    cursor: pointer;
  }

  .nav-toggle-bar,
  .nav-toggle-bar::before,
  .nav-toggle-bar::after {
    display: block;
    width: 1.1rem;
    height: 2px;
    background: currentColor;
    border-radius: 2px;
    transition: transform 0.2s var(--ease);
  }

  .nav-toggle-bar { position: relative; }

  .nav-toggle-bar::before,
  .nav-toggle-bar::after {
    content: "";
    position: absolute;
    left: 0;
  }

  .nav-toggle-bar::before { top: -6px; }
  .nav-toggle-bar::after { top: 6px; }

  .nav-toggle[aria-expanded="true"] .nav-toggle-bar { background: transparent; }
  .nav-toggle[aria-expanded="true"] .nav-toggle-bar::before { transform: translateY(6px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] .nav-toggle-bar::after { transform: translateY(-6px) rotate(-45deg); }

  .js .site-nav {
    display: none;
    flex-basis: 100%;
    flex-direction: column;
    align-items: stretch;
    padding-bottom: var(--space-4);
  }

  .js .site-nav.is-open { display: flex; }

  .js .site-nav ul {
    flex-direction: column;
    gap: 0;
  }

  .js .site-nav ul a {
    display: block;
    padding: var(--space-3) 0;
    border-bottom: 1px solid var(--color-border);
    font-size: 1.0625rem;
  }
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
  position: relative;
  isolation: isolate;
  padding-block: var(--space-7) var(--space-6);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: -30% -10% auto auto;
  width: 40rem;
  height: 40rem;
  background: radial-gradient(closest-side, color-mix(in srgb, var(--color-accent-deep) 55%, transparent), transparent);
  pointer-events: none;
  z-index: -1;
}

.hero-inner {
  display: grid;
  gap: var(--space-5);
  align-items: center;
}

.hero-mark { display: none; }

@media (min-width: 56rem) {
  .hero-inner { grid-template-columns: 1.5fr 1fr; }

  .hero-mark {
    display: block;
    width: 100%;
    max-width: 24rem;
    justify-self: end;
  }
}

.hero h1 {
  max-width: 20ch;
  margin-top: var(--space-4);
  font-size: clamp(2.25rem, 1.4rem + 4vw, 4rem);
}

.hero-sub {
  max-width: 50ch;
  color: var(--color-text-muted);
  font-size: 1.125rem;
}

.hero-sub strong { color: var(--color-text); }

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-5);
}

/* ==========================================================================
   Sections
   ========================================================================== */
.section { padding-block: var(--space-7); }

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

.section-head { margin-bottom: var(--space-5); }

/* Case studies */
.case-list,
.service-list,
.quote-list {
  display: grid;
  gap: var(--space-4);
  margin: 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 48rem) {
  .case-list { grid-template-columns: repeat(auto-fit, minmax(18rem, 1fr)); }
  .service-list { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 64rem) {
  .service-list { grid-template-columns: repeat(4, 1fr); }
}

.case {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  transition: border-color 0.2s, transform 0.2s var(--ease);
}

.case:hover {
  border-color: color-mix(in srgb, var(--color-primary) 50%, var(--color-border));
  transform: translateY(-2px);
}

.case-outcome {
  margin-bottom: var(--space-2);
  color: var(--color-primary);
  font-weight: 600;
}

.case-meta {
  margin-top: calc(var(--space-2) * -1);
  color: var(--color-secondary);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}

.case-problem { color: var(--color-text-muted); }

.case-details {
  margin-bottom: var(--space-3);
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-3);
}

.case-details summary {
  cursor: pointer;
  color: var(--color-text);
  font-weight: 600;
}

.case-details dl { margin: var(--space-3) 0 0; }
.case-details dt { color: var(--color-secondary); font-size: 0.875rem; font-weight: 600; }
.case-details dd { margin: 0 0 var(--space-3); color: var(--color-text-muted); }

.case-links {
  display: flex;
  gap: var(--space-4);
  margin: auto 0 0;
  font-weight: 600;
}

/* Services */
.service {
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
}

.service p { margin: 0; color: var(--color-text-muted); }

.consulting-note {
  max-width: 65ch;
  margin: var(--space-5) 0 0;
  color: var(--color-text-muted);
}

.consulting-note strong { color: var(--color-text); }

/* Skills */
.skill-groups {
  display: grid;
  gap: var(--space-4);
}

@media (min-width: 40rem) {
  .skill-groups { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 64rem) {
  .skill-groups { grid-template-columns: repeat(4, 1fr); }
}

.skill-group h3 {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  font-weight: 600;
}

/* About */
.about {
  display: grid;
  gap: var(--space-5);
  align-items: center;
}

@media (min-width: 48rem) {
  .about { grid-template-columns: 15rem 1fr; }
}

.about-photo {
  width: 15rem;
  max-width: 100%;
  aspect-ratio: 1;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--color-border);
}

.about-text { max-width: 60ch; }
.about-text p:not(.eyebrow) { color: var(--color-text-muted); }

.credentials {
  display: grid;
  gap: var(--space-3);
  margin: var(--space-4) 0 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 40rem) {
  .credentials { grid-template-columns: repeat(3, 1fr); }
}

.credentials li {
  display: grid;
  gap: var(--space-1);
  padding: var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
}

.credentials strong { color: var(--color-primary); }

.credentials a {
  font-size: 0.875rem;
  font-weight: 600;
}

.credentials span:not(.visually-hidden) {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  line-height: 1.45;
}

/* Testimonials */
.quote {
  margin: 0;
  padding: var(--space-4);
  border-left: 3px solid var(--color-primary);
  background: var(--color-surface);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.quote blockquote { margin: 0 0 var(--space-3); font-size: 1.125rem; }
.quote figcaption { color: var(--color-text-muted); font-size: 0.9375rem; }

/* Contact */
.contact {
  display: grid;
  gap: var(--space-5);
}

@media (min-width: 56rem) {
  .contact {
    grid-template-columns: 1fr 1.25fr;
    align-items: center;
  }

  .contact-cards { grid-column: 1 / -1; }
}

.contact-intro > p:not(.eyebrow) {
  max-width: 40ch;
  margin-bottom: 0;
  color: var(--color-text-muted);
}

.contact-email {
  position: relative;
  padding: var(--space-5) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 100% 0%, color-mix(in srgb, var(--color-primary) 12%, transparent), transparent 60%),
    var(--color-bg);
  overflow: hidden;
}

.contact-label {
  margin-bottom: var(--space-2);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.email-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3) var(--space-4);
}

.email-link {
  color: var(--color-text);
  font-size: clamp(1.5rem, 1rem + 2.5vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  text-decoration: none;
  overflow-wrap: anywhere;
}

.email-link:hover {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-thickness: 2px;
}

.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 2.75rem;
  padding: 0.5rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-surface);
  color: var(--color-secondary);
  font: inherit;
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s;
}

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

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

.contact-cards {
  display: grid;
  gap: var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 40rem) {
  .contact-cards { grid-template-columns: repeat(3, 1fr); }
}

.contact-card {
  position: relative;
  display: grid;
  gap: var(--space-1);
  height: 100%;
  padding: var(--space-4);
  padding-right: var(--space-6);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
  text-decoration: none;
  transition: border-color 0.2s, transform 0.2s var(--ease);
}

.contact-card::after {
  content: "\2197"; /* ↗ */
  content: "\2197" / ""; /* decorative: empty alt text for screen readers */
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  color: var(--color-primary);
  font-size: 1.25rem;
  line-height: 1;
  transition: transform 0.2s var(--ease);
}

.contact-card[download]::after {
  content: "\2193"; /* ↓ */
  content: "\2193" / "";
}

.contact-card:hover {
  border-color: color-mix(in srgb, var(--color-primary) 50%, var(--color-border));
  transform: translateY(-2px);
}

.contact-card:hover::after { transform: translate(2px, -2px); }
.contact-card[download]:hover::after { transform: translateY(2px); }

.contact-card-title {
  color: var(--color-text);
  font-size: 1.125rem;
  font-weight: 700;
}

.contact-card-desc {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  line-height: 1.45;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  padding-block: var(--space-5);
  color: var(--color-text-muted);
  font-size: 0.9375rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.footer-inner p { margin: 0; }

.footer-logo img { width: 8rem; }

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin: 0;
  padding: 0;
  list-style: none;
}

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

/* ==========================================================================
   Motion — reveal is an enhancement; content is visible without JS
   ========================================================================== */
@media (prefers-reduced-motion: no-preference) {
  .reveal-ready .reveal {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
  }

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

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}