/* Minimal design-system tokens + site utilities
 * Source: edison-portfolio redesign, Minimal package
 */

:root {
  --bg: #ffffff;
  --surface: #fafafa;
  --surface-warm: #f5f5f5;
  --fg: #111111;
  --fg-2: #3a3a3a;
  --muted: #777777;
  --meta: #111111;
  --border: #e2e2e2;
  --border-soft: #eeeeee;
  --accent: #111111;
  --accent-on: #ffffff;
  --accent-hover: color-mix(in oklab, var(--accent), black 8%);
  --accent-active: color-mix(in oklab, var(--accent), black 14%);
  --success: #168a46;
  --warn: #b7791f;
  --danger: #c53030;

  --font-display: Inter, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: Inter, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: "SF Mono", ui-monospace, Menlo, monospace;

  --text-xs: 12px;
  --text-sm: 14px;
  --text-base: 16px;
  --text-lg: 18px;
  --text-xl: 22px;
  --text-2xl: 32px;
  --text-3xl: 48px;
  --text-4xl: 64px;

  --leading-body: 1.55;
  --leading-tight: 1.08;
  --tracking-display: -0.02em;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;

  --section-y-desktop: 112px;
  --section-y-tablet: 80px;
  --section-y-phone: 56px;

  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-lg: 8px;
  --radius-pill: 9999px;

  --elev-flat: none;
  --elev-ring: 0 0 0 1px var(--border);
  --elev-raised: 0 12px 30px rgba(0, 0, 0, 0.08);
  --focus-ring: 0 0 0 3px rgba(17, 17, 17, 0.18);

  --motion-fast: 140ms;
  --motion-base: 220ms;
  --ease-standard: cubic-bezier(0.2, 0, 0, 1);

  --container-max: 1120px;
  --container-gutter-desktop: 36px;
  --container-gutter-tablet: 24px;
  --container-gutter-phone: 16px;
}

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

button, a.btn {
  font: inherit;
  cursor: pointer;
}

p { text-wrap: pretty; }

h1, h2, h3, h4 { text-wrap: balance; }

/* layout primitives */

.container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-gutter-desktop);
}

@media (max-width: 920px) {
  .container { padding-inline: var(--container-gutter-tablet); }
}

@media (max-width: 640px) {
  .container { padding-inline: var(--container-gutter-phone); }
}

.section {
  padding-block: var(--section-y-desktop);
}

@media (max-width: 920px) {
  .section { padding-block: var(--section-y-tablet); }
}

@media (max-width: 640px) {
  .section { padding-block: var(--section-y-phone); }
}

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

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

.row-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-8);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

@media (max-width: 920px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
}

/* typography */

.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 var(--space-4);
}

h1, .h1 {
  font-family: var(--font-display);
  font-size: clamp(40px, 8vw, var(--text-4xl));
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-display);
  margin: 0;
}

h2, .h2 {
  font-family: var(--font-display);
  font-size: clamp(28px, 5vw, var(--text-3xl));
  line-height: 1.1;
  letter-spacing: -0.015em;
  margin: 0;
}

h3, .h3 {
  font-family: var(--font-body);
  font-size: var(--text-xl);
  font-weight: 600;
  line-height: 1.25;
  margin: 0;
}

.lead {
  font-size: var(--text-lg);
  line-height: 1.5;
  color: var(--fg-2);
  max-width: 60ch;
  margin: 0;
}

.meta {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--muted);
}

.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* chrome */

.topnav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in oklab, var(--bg) 92%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.topnav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-4);
  gap: var(--space-4);
  flex-wrap: wrap;
}

@media (max-width: 920px) {
  .btn[data-od-id="topnav-cv"] { display: none !important; }
}

.logo {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  letter-spacing: -0.01em;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  flex-wrap: wrap;
}

.nav a {
  font-size: var(--text-sm);
  color: var(--muted);
  transition: color var(--motion-fast) ease;
}

.nav a:hover,
.nav a[aria-current="page"] {
  color: var(--fg);
}

.pagefoot {
  padding-block: var(--space-8);
  border-top: 1px solid var(--border);
}

.pagefoot .row-between {
  color: var(--muted);
  font-size: var(--text-xs);
}

.pagefoot .nav {
  gap: var(--space-5);
}

/* buttons */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 10px 18px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  font-size: var(--text-sm);
  font-weight: 500;
  transition: background var(--motion-fast) ease, border-color var(--motion-fast) ease, transform 0.05s ease;
}

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

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

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

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

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

/* links */

a.link {
  color: var(--fg);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--border);
  transition: text-decoration-color var(--motion-fast) ease;
}

a.link:hover {
  text-decoration-color: var(--fg);
}

/* cards */

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.card-flat {
  background: transparent;
  border: 0;
  padding: 0;
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  font-size: var(--text-xs);
  color: var(--muted);
}

/* case studies */

.case-card {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.case-img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-4);
}

.case-img.ph {
  background: var(--surface);
  display: grid;
  place-items: center;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-align: center;
  padding-inline: var(--space-4);
}

.case-card h3 { margin-bottom: var(--space-2); }

.case-card p {
  margin: 0 0 var(--space-3);
  color: var(--muted);
  font-size: var(--text-sm);
  line-height: 1.5;
}

.case-card .row { margin-top: auto; }

/* log rows */

.log-row {
  display: grid;
  grid-template-columns: 120px 1fr auto;
  gap: var(--space-6);
  padding: var(--space-5) 0;
  border-top: 1px solid var(--border);
  align-items: baseline;
}

.log-row h3 {
  font-size: var(--text-base);
  font-weight: 500;
}

.log-row p {
  margin: var(--space-1) 0 0;
  color: var(--muted);
  font-size: var(--text-sm);
}

@media (max-width: 920px) {
  .log-row {
    grid-template-columns: 1fr;
    gap: var(--space-1);
  }
  .log-row .meta.pull { text-align: left; }
}

/* hero */

.hero-home {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--space-12);
  align-items: center;
}

.hero-home h1 {
  font-size: clamp(28px, 4vw, var(--text-2xl));
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-3);
}

.hero-home .lead { margin-bottom: var(--space-4); }

.page-hero h1 {
  font-size: clamp(26px, 4vw, var(--text-2xl));
  font-weight: 600;
  letter-spacing: -0.01em;
}

.hero-center {
  text-align: center;
  max-width: 54ch;
  margin-inline: auto;
}

.hero-center h1 { margin-bottom: var(--space-4); }

.hero-center .lead {
  margin-inline: auto;
  margin-bottom: var(--space-6);
}

@media (max-width: 920px) {
  .hero-home { grid-template-columns: 1fr; }
}

/* stats */

.stat-num {
  font-family: var(--font-display);
  font-size: clamp(48px, 6vw, 72px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--fg);
  margin: 0;
}

.stat-label {
  color: var(--muted);
  font-size: var(--text-sm);
  margin-top: var(--space-2);
  max-width: 26ch;
}

/* forms */

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

.field label {
  font-size: var(--text-sm);
  color: var(--muted);
}

.input, .textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg);
  color: var(--fg);
  font: inherit;
  font-size: var(--text-base);
}

.input:focus, .textarea:focus {
  outline: 2px solid var(--border-soft);
  border-color: var(--accent);
}

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

/* portrait */

.portrait {
  width: 100%;
  max-width: 360px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
}

.portrait-round {
  width: 100%;
  max-width: 280px;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 50%;
  border: 2px solid var(--border);
}

/* topnav cta */

.topnav .btn { padding: 8px 14px; font-size: var(--text-xs); }

/* scroll reveal */

[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--ease-standard), transform 0.6s var(--ease-standard);
}

[data-reveal].reveal-visible {
  opacity: 1;
  transform: translateY(0);
}

/* stagger children inside a reveal container */

[data-reveal-stagger] > * {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s var(--ease-standard), transform 0.5s var(--ease-standard);
}

[data-reveal-stagger].reveal-visible > *:nth-child(1) { transition-delay: 0ms; }
[data-reveal-stagger].reveal-visible > *:nth-child(2) { transition-delay: 80ms; }
[data-reveal-stagger].reveal-visible > *:nth-child(3) { transition-delay: 160ms; }
[data-reveal-stagger].reveal-visible > *:nth-child(4) { transition-delay: 240ms; }
[data-reveal-stagger].reveal-visible > *:nth-child(5) { transition-delay: 320ms; }
[data-reveal-stagger].reveal-visible > *:nth-child(6) { transition-delay: 400ms; }
[data-reveal-stagger].reveal-visible > *:nth-child(7) { transition-delay: 480ms; }
[data-reveal-stagger].reveal-visible > *:nth-child(8) { transition-delay: 560ms; }

[data-reveal-stagger].reveal-visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* carousel */

.carousel-wrap {
  position: relative;
}

.carousel-scroll {
  display: flex;
  gap: var(--space-4);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  padding-bottom: var(--space-2);
  -webkit-overflow-scrolling: touch;
}

.carousel-scroll::-webkit-scrollbar { display: none; }

.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--fg);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  line-height: 1;
  transition: opacity var(--motion-fast) ease, box-shadow var(--motion-fast) ease;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.carousel-btn:hover {
  box-shadow: 0 4px 14px rgba(0,0,0,0.10);
}

.carousel-btn:active { transform: translateY(-50%) scale(0.95); }

.carousel-btn--left  { left: -8px; }
.carousel-btn--right { right: -8px; }

.carousel-btn:disabled {
  opacity: 0.25;
  pointer-events: none;
}

@media (max-width: 640px) {
  .carousel-btn { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  [data-reveal],
  [data-reveal-stagger] > * {
    transition: none;
    opacity: 1;
    transform: none;
  }
}

/* utility */

.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;
}