/* ============================================
   PORTFOLIO — Juan Tomás Martínez
   Linear / Vercel-inspired aesthetic
   ============================================ */

/* ---- Design tokens ---- */
:root {
  /* Dark theme (default) */
  --bg: #0a0a0a;
  --bg-elevated: #111111;
  --bg-subtle: #161616;
  --border: #1f1f1f;
  --border-strong: #2a2a2a;
  --text: #ededed;
  --text-secondary: #a1a1a1;
  --text-tertiary: #6b6b6b;
  --accent: #ffffff;
  --accent-muted: #f5f5f5;
  /* Brand accent (emerald, derived from CV) */
  --accent-brand: #34d399;
  --accent-brand-strong: #10b981;
  --accent-brand-soft: color-mix(in srgb, var(--accent-brand) 14%, transparent);
  --success: #34d399;
  --error: #f87171;

  /* Type scale (fluid) */
  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-lg: 1.125rem;
  --fs-xl: clamp(1.25rem, 1.1rem + 0.5vw, 1.5rem);
  --fs-2xl: clamp(1.5rem, 1.3rem + 1vw, 2rem);
  --fs-3xl: clamp(2rem, 1.6rem + 2vw, 3rem);
  --fs-4xl: clamp(2.5rem, 1.8rem + 3.5vw, 4.5rem);
  /* Hero title only. At the previous slope (2rem + 5vw) the longest Spanish line
     rendered flush against the viewport edge on a 390px phone — ~1px of headroom,
     and it clipped outright before the webfont swapped in. This slope keeps ~30px
     of margin at 360-390px and still caps at 6rem on desktop. */
  --fs-5xl: clamp(2.75rem, 1.8rem + 4.4vw, 6rem);

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Radius */
  --r-sm: 4px;
  --r-md: 6px;
  --r-lg: 10px;

  /* Motion */
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-snap: cubic-bezier(0.4, 0, 0.2, 1);
  --dur-fast: 150ms;
  --dur: 280ms;
  --dur-slow: 600ms;

  /* Layout */
  --container: 1100px;
  --header-h: 64px;

  /* Fonts */
  --font-sans: "Geist", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "Geist Mono", ui-monospace, "SF Mono", Menlo, monospace;
}

[data-theme="light"] {
  --bg: #fafafa;
  --bg-elevated: #ffffff;
  --bg-subtle: #f4f4f4;
  --border: #e8e8e8;
  --border-strong: #d4d4d4;
  --text: #0a0a0a;
  --text-secondary: #525252;
  --text-tertiary: #8a8a8a;
  --accent: #0a0a0a;
  --accent-muted: #1a1a1a;
  --accent-brand: #059669;
  --accent-brand-strong: #047857;
  --accent-brand-soft: color-mix(in srgb, var(--accent-brand) 12%, transparent);
  --success: #059669;
}

/* ---- Reset ---- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  font-feature-settings: "ss01", "ss02", "cv01", "cv11";
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
  overflow-x: hidden;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

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

button {
  font-family: inherit;
  cursor: pointer;
  background: none;
  border: none;
  color: inherit;
}

input,
textarea,
select {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

::selection {
  background: var(--text);
  color: var(--bg);
}

/* ---- Skip link ---- */
.skip-link {
  position: absolute;
  top: -40px;
  left: 8px;
  padding: 8px 12px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-sm);
  font-size: var(--fs-sm);
  z-index: 1000;
  transition: top var(--dur-fast) var(--ease);
}
.skip-link:focus {
  top: 8px;
}

/* ---- Grain overlay ---- */
.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.025;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
}

/* ---- Layout ---- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--space-8);
  }
}

/* ============================================
   HEADER
   ============================================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  z-index: 100;
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.site-header.scrolled {
  border-bottom-color: var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: var(--space-6);
}

.logo {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  font-weight: 500;
  letter-spacing: -0.02em;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: 1px solid var(--border-strong);
  border-radius: var(--r-sm);
  background: var(--bg-elevated);
  transition: border-color var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
}

.logo:hover .logo-mark {
  border-color: var(--accent-brand);
  color: var(--accent-brand);
  transform: rotate(-3deg);
}

.nav {
  display: none;
}

@media (min-width: 768px) {
  .nav {
    display: block;
  }
}

.nav ul {
  display: flex;
  gap: var(--space-1);
}

.nav a {
  display: inline-block;
  padding: var(--space-2) var(--space-4);
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  border-radius: var(--r-sm);
  transition: color var(--dur-fast) var(--ease), background-color var(--dur-fast) var(--ease);
}

.nav a:hover {
  color: var(--text);
  background: var(--bg-subtle);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.lang-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: 500;
  color: var(--text-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  transition: border-color var(--dur-fast) var(--ease);
}

.lang-toggle:hover {
  border-color: var(--border-strong);
}

.lang-option {
  transition: color var(--dur-fast) var(--ease);
}

.lang-option.active {
  color: var(--text);
}

.lang-sep {
  opacity: 0.4;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  transition: border-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}

.theme-toggle:hover {
  border-color: var(--border-strong);
  color: var(--text);
}

[data-theme="dark"] .icon-sun {
  display: block;
}
[data-theme="dark"] .icon-moon {
  display: none;
}
[data-theme="light"] .icon-sun {
  display: none;
}
[data-theme="light"] .icon-moon {
  display: block;
}

/* Mobile menu button */
.menu-btn {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  padding: 6px;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
}

.menu-btn span {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--text);
  transition: transform var(--dur-fast) var(--ease), opacity var(--dur-fast) var(--ease);
}

.menu-btn[aria-expanded="true"] span:first-child {
  transform: translateY(3.5px) rotate(45deg);
}
.menu-btn[aria-expanded="true"] span:last-child {
  transform: translateY(-3.5px) rotate(-45deg);
}

@media (min-width: 768px) {
  .menu-btn {
    display: none;
  }
}

/* Mobile nav drawer */
@media (max-width: 767px) {
  .nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: var(--space-4) var(--space-6);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
  }
  .nav.open {
    display: block;
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav ul {
    flex-direction: column;
    gap: var(--space-1);
  }
  .nav a {
    display: block;
    padding: var(--space-3) var(--space-4);
    font-size: var(--fs-base);
  }
}

/* ============================================
   HERO
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--header-h) + var(--space-16)) 0 var(--space-16);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  width: 100%;
  height: 100%;
  transform: translateX(-50%);
  background:
    radial-gradient(ellipse 60% 50% at 50% 0%, color-mix(in srgb, var(--text) 4%, transparent), transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.hero > .container {
  position: relative;
  z-index: 2;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
  align-items: center;
}

@media (min-width: 860px) {
  .hero-inner {
    grid-template-columns: 1.6fr 0.9fr;
    gap: var(--space-12);
  }
}

.hero-photo {
  order: -1;
  justify-self: start;
  width: clamp(120px, 38vw, 150px);
  margin: 0;
  animation: fadeInUp 0.7s var(--ease) 0.15s backwards;
}

@media (min-width: 860px) {
  .hero-photo {
    order: 0;
    justify-self: end;
    width: 100%;
    max-width: 320px;
  }
}

.hero-photo img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border-radius: var(--r-lg);
  border: 1px solid var(--border-strong);
  background: var(--bg-elevated);
  filter: grayscale(0.15);
  transition: filter var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.hero-photo:hover img {
  filter: grayscale(0);
  border-color: var(--accent-brand);
  transform: translateY(-3px);
}

/* Hidden when no profile image is available (set by JS on load error) */
.hero-photo[hidden] {
  display: none;
}

.hero-status {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  margin-bottom: var(--space-8);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--text-secondary);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 100px;
  animation: fadeInUp 0.6s var(--ease) backwards;
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 8px color-mix(in srgb, var(--success) 60%, transparent);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.hero-title {
  font-size: var(--fs-5xl);
  font-weight: 600;
  line-height: 1.02;
  letter-spacing: -0.04em;
  margin-bottom: var(--space-6);
  animation: fadeInUp 0.7s var(--ease) 0.1s backwards;
}

.hero-accent {
  color: var(--accent-brand);
  font-weight: 400;
}

.hero-sub {
  font-size: var(--fs-lg);
  color: var(--text-secondary);
  max-width: 60ch;
  margin-bottom: var(--space-10);
  animation: fadeInUp 0.7s var(--ease) 0.2s backwards;
}

.hero-cta {
  display: flex;
  gap: var(--space-3);
  margin-bottom: var(--space-16);
  flex-wrap: wrap;
  animation: fadeInUp 0.7s var(--ease) 0.3s backwards;
}

.hero-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--space-6);
  padding-top: var(--space-8);
  border-top: 1px solid var(--border);
  animation: fadeInUp 0.7s var(--ease) 0.4s backwards;
}

.hero-meta li {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.hero-meta-label {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.hero-meta-value {
  font-size: var(--fs-sm);
  color: var(--text);
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  font-size: var(--fs-sm);
  font-weight: 500;
  line-height: 1;
  border-radius: var(--r-md);
  border: 1px solid transparent;
  transition: background-color var(--dur-fast) var(--ease),
              border-color var(--dur-fast) var(--ease),
              color var(--dur-fast) var(--ease),
              transform var(--dur-fast) var(--ease);
  white-space: nowrap;
}

.btn:active {
  transform: scale(0.98);
}

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

.btn-primary svg {
  transition: transform var(--dur-fast) var(--ease);
}
.btn-primary:hover svg {
  transform: translateX(2px);
}

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

/* ============================================
   SECTIONS
   ============================================ */
.section {
  padding: var(--space-24) 0;
  position: relative;
  z-index: 2;
}

@media (min-width: 768px) {
  .section {
    padding: var(--space-32) 0;
  }
}

.section-head {
  display: flex;
  align-items: baseline;
  gap: var(--space-4);
  margin-bottom: var(--space-12);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--border);
}

.section-num {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--accent-brand);
  letter-spacing: 0.05em;
}

.section-title {
  font-size: var(--fs-2xl);
  font-weight: 600;
  letter-spacing: -0.02em;
}

/* ============================================
   ABOUT
   ============================================ */
.about-grid {
  display: grid;
  gap: var(--space-12);
  grid-template-columns: 1fr;
}

@media (min-width: 900px) {
  .about-grid {
    grid-template-columns: 1.6fr 1fr;
    gap: var(--space-16);
  }
}

.about-body .lead {
  font-size: var(--fs-xl);
  color: var(--text);
  margin-bottom: var(--space-5);
  letter-spacing: -0.01em;
  line-height: 1.5;
}

.about-body p {
  color: var(--text-secondary);
  font-size: var(--fs-lg);
  line-height: 1.65;
}

.about-side {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.about-card {
  padding: var(--space-5);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  transition: border-color var(--dur-fast) var(--ease);
}

.about-card:hover {
  border-color: var(--border-strong);
}

.about-card-label {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-2);
}

.about-card-text {
  color: var(--text);
  font-size: var(--fs-sm);
}

/* ============================================
   WORK
   ============================================ */
.work-list {
  display: flex;
  flex-direction: column;
}

.work-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  padding: var(--space-8) 0;
  border-top: 1px solid var(--border);
  transition: padding var(--dur) var(--ease);
}

.work-item:last-child {
  border-bottom: 1px solid var(--border);
}

@media (min-width: 768px) {
  .work-item {
    grid-template-columns: 180px 1fr;
    gap: var(--space-8);
    padding: var(--space-10) 0;
  }
}

.work-meta {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.work-year {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--text);
}

.work-type {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.work-title {
  font-size: var(--fs-2xl);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-3);
}

.work-desc {
  color: var(--text-secondary);
  font-size: var(--fs-base);
  margin-bottom: var(--space-5);
  max-width: 65ch;
}

.work-stack {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
}

.work-stack li {
  padding: var(--space-1) var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--text-secondary);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 100px;
}

.work-highlight {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  line-height: 1.4;
  color: var(--accent-brand);
  background: var(--accent-brand-soft);
  border: 1px solid color-mix(in srgb, var(--accent-brand) 25%, transparent);
  border-radius: var(--r-sm);
}

.work-highlight svg {
  flex-shrink: 0;
}

.work-links {
  display: flex;
  gap: var(--space-4);
  align-items: center;
}

.work-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-sm);
  color: var(--text);
  padding-bottom: 2px;
  border-bottom: 1px solid var(--border-strong);
  transition: border-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}

.work-link svg {
  transition: transform var(--dur-fast) var(--ease);
}

.work-link:hover {
  border-color: var(--accent-brand);
  color: var(--accent-brand);
}

.work-link:hover svg {
  transform: translate(2px, -2px);
}

/* Primary "live demo" link — stands out from the muted code link */
.work-link--demo {
  color: var(--accent-brand);
  border-bottom-color: var(--accent-brand);
}

.work-link--demo:hover {
  color: var(--accent-brand-strong);
  border-bottom-color: var(--accent-brand-strong);
}

/* Small attribution / credit line under a project's links */
.work-note {
  margin-top: var(--space-3);
  font-size: var(--fs-xs);
  color: var(--text-tertiary);
}

.work-all {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-10);
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  transition: color var(--dur-fast) var(--ease);
}

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

.work-all svg {
  transition: transform var(--dur-fast) var(--ease);
}

.work-all:hover svg {
  transform: translateX(2px);
}

/* ============================================
   EXPERIENCE / TIMELINE
   ============================================ */
.timeline {
  display: flex;
  flex-direction: column;
  gap: var(--space-10);
}

.timeline-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

@media (min-width: 768px) {
  .timeline-item {
    grid-template-columns: 200px 1fr;
    gap: var(--space-8);
  }
}

.timeline-aside {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.timeline-company {
  font-size: var(--fs-lg);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
}

.timeline-period {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--accent-brand);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.timeline-place {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--text-tertiary);
}

/* Roles: vertical line with nodes */
.timeline-body {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  padding-left: var(--space-6);
}

.timeline-body::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: var(--border-strong);
}

.timeline-role {
  position: relative;
}

.timeline-role::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--space-6));
  top: 7px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-brand);
  box-shadow: 0 0 0 3px var(--accent-brand-soft);
}

.timeline-role-title {
  font-size: var(--fs-lg);
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-2);
}

.timeline-role-desc {
  color: var(--text-secondary);
  font-size: var(--fs-base);
  max-width: 60ch;
}

.timeline-stack {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-1);
}

.timeline-stack li {
  padding: var(--space-1) var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--text-secondary);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 100px;
}

/* ============================================
   STACK
   ============================================ */
.stack-grid {
  display: grid;
  gap: var(--space-8);
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.stack-group {
  padding-top: var(--space-4);
  border-top: 1px solid var(--border);
}

.stack-group-title {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-tertiary);
  margin-bottom: var(--space-4);
}

.stack-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.stack-list li {
  font-size: var(--fs-base);
  color: var(--text);
  padding: var(--space-1) 0;
  transition: color var(--dur-fast) var(--ease);
  position: relative;
  padding-left: var(--space-4);
}

.stack-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 6px;
  height: 1px;
  background: var(--text-tertiary);
  transition: width var(--dur-fast) var(--ease), background-color var(--dur-fast) var(--ease);
}

.stack-list li:hover::before {
  width: 10px;
  background: var(--accent-brand);
}

/* ============================================
   CONTACT
   ============================================ */
.contact-grid {
  display: grid;
  gap: var(--space-12);
  grid-template-columns: 1fr;
}

@media (min-width: 900px) {
  .contact-grid {
    grid-template-columns: 1fr 1.2fr;
    gap: var(--space-16);
  }
}

.contact-lead {
  font-size: var(--fs-xl);
  color: var(--text);
  margin-bottom: var(--space-8);
  letter-spacing: -0.01em;
}

.contact-direct {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.contact-direct li {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--border);
}

.contact-direct li:last-child {
  border-bottom: none;
}

.contact-label {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.contact-direct a {
  color: var(--text);
  font-size: var(--fs-base);
  transition: color var(--dur-fast) var(--ease);
}

.contact-direct a:hover {
  color: var(--text-secondary);
}

/* Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.field label {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.field input,
.field textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--bg-elevated);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  font-size: var(--fs-base);
  line-height: 1.5;
  transition: border-color var(--dur-fast) var(--ease), background-color var(--dur-fast) var(--ease);
}

.field input:hover,
.field textarea:hover {
  border-color: var(--border-strong);
}

.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--text);
  background: var(--bg-subtle);
}

.field textarea {
  resize: vertical;
  min-height: 120px;
}

.field input[aria-invalid="true"],
.field textarea[aria-invalid="true"] {
  border-color: var(--error);
}

.field-error {
  display: none;
  font-size: var(--fs-xs);
  color: var(--error);
  margin-top: var(--space-1);
}

.field-error.visible {
  display: block;
}

/* Honeypot — hidden from real users */
.honeypot {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

#submit-btn {
  align-self: flex-start;
  min-width: 160px;
  position: relative;
}

#submit-btn .btn-loading {
  display: none;
}

#submit-btn[data-state="loading"] .btn-text {
  opacity: 0;
}

#submit-btn[data-state="loading"] .btn-loading {
  display: inline-flex;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: translate(-50%, -50%) rotate(360deg); }
}

.form-feedback {
  font-size: var(--fs-sm);
  min-height: 1.5em;
}

.form-feedback.success {
  color: var(--success);
}

.form-feedback.error {
  color: var(--error);
}

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
  padding: var(--space-10) 0;
  border-top: 1px solid var(--border);
  position: relative;
  z-index: 2;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  align-items: flex-start;
}

@media (min-width: 600px) {
  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.footer-copy {
  font-size: var(--fs-sm);
  color: var(--text-tertiary);
}

.footer-social {
  display: flex;
  gap: var(--space-2);
}

.footer-social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}

.footer-social a:hover {
  color: var(--text);
  border-color: var(--text-tertiary);
}

/* ============================================
   FOCUS STATES
   ============================================ */
:focus-visible {
  outline: 2px solid var(--accent-brand);
  outline-offset: 2px;
  border-radius: var(--r-sm);
}

button:focus-visible,
a:focus-visible {
  outline-offset: 4px;
}

/* ============================================
   SCROLL-REVEAL
   ============================================ */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}