/* ---------------------------------------------------------------------------
   lukss — editorial design system.
   Forest-green sage on warm paper. Type-led, bold, restrained.
   --------------------------------------------------------------------------- */

:root {
  --paper:       #f0f2ec;
  --paper-soft:  #e4e8de;
  --paper-deep:  #d5dace;
  --surface:     #ffffff;

  --ink-950: #080f07;
  --ink-900: #0f1a0d;
  --ink-700: #2a3828;
  --ink-500: #5a6e56;
  --ink-300: #96a890;
  --ink-100: #c8d4c2;

  --accent-700: #2d5228;
  --accent-600: #3d6e36;
  --accent-500: #558f4c;
  --accent-100: #c8e2c2;

  --success: #3d6e36;

  --bg:           var(--paper);
  --bg-elevated:  var(--surface);
  --fg:           var(--ink-900);
  --fg-muted:     var(--ink-500);
  --fg-strong:    var(--ink-950);
  --border:       var(--ink-100);
  --border-soft:  var(--paper-deep);
  --primary:      var(--accent-600);
  --primary-hover: var(--accent-700);
  --primary-fg:   #f0f7ee;

  --font-display: "Instrument Serif", "Times New Roman", Georgia, serif;
  --font-body:    "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --font-mono:    "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, monospace;

  --radius-xs:   2px;
  --radius-sm:   4px;
  --radius-md:   8px;
  --radius-lg:   14px;
  --radius-xl:   22px;
  --radius-pill: 999px;

  --shadow-1: 0 1px 2px rgba(17, 16, 12, 0.04);
  --shadow-2: 0 4px 16px -6px rgba(17, 16, 12, 0.08);
  --shadow-3: 0 18px 48px -24px rgba(17, 16, 12, 0.18);

  --ring-focus: 0 0 0 3px rgba(61, 110, 54, 0.25);

  --ease:  cubic-bezier(0.2, 0, 0, 1);
  --dur-1: 120ms;
  --dur-2: 200ms;
  --dur-3: 360ms;
}

[data-theme="dark"] {
  --paper:       #0c110b;
  --paper-soft:  #121a10;
  --paper-deep:  #182016;
  --surface:     #121a10;

  --ink-950: #eef5eb;
  --ink-900: #ddebd8;
  --ink-700: #a8c4a2;
  --ink-500: #6e8e68;
  --ink-300: #3d5438;
  --ink-100: #213020;

  --accent-700: #7abf70;
  --accent-600: #62a858;
  --accent-500: #4d8e44;
  --accent-100: #1a3018;

  --border:      #1e2a1c;
  --border-soft: #182016;

  --shadow-2: 0 4px 16px -6px rgba(0, 0, 0, 0.55);
  --shadow-3: 0 18px 48px -24px rgba(0, 0, 0, 0.7);
}

html { color-scheme: light dark; }

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

html { scroll-behavior: smooth; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
}

/* Subtle paper-grain overlay */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='300' height='300' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 1000;
  opacity: 0.5;
}

h1, h2, h3, h4, h5 {
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: -0.025em;
  line-height: 1;
  color: var(--fg-strong);
  margin: 0 0 1rem;
  text-wrap: balance;
}

p {
  margin: 0 0 1rem;
  color: var(--ink-700);
  line-height: 1.7;
  text-wrap: pretty;
}

a { color: inherit; text-decoration: none; transition: color var(--dur-2) var(--ease); }
button { font: inherit; border: none; cursor: pointer; background: none; color: inherit; }
svg { display: block; max-width: 100%; }
em, i { font-style: italic; }

::selection { background: var(--accent-100); color: var(--fg-strong); }

.shell { width: min(960px, calc(100% - 3rem)); margin: 0 auto; }

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in oklab, var(--paper) 85%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav__inner {
  display: grid; grid-template-columns: auto 1fr auto;
  align-items: center; gap: 2rem;
  padding: 1.25rem 0;
}
.nav__brand {
  font-family: var(--font-display); font-size: 1.8rem;
  letter-spacing: -0.02em; color: var(--ink-950);
  display: inline-flex; align-items: baseline; gap: 6px;
}
.nav__brand .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent-500);
  display: inline-block; transform: translateY(-2px);
  transition: background var(--dur-2) var(--ease);
}
.nav__links { list-style: none; margin: 0; padding: 0; display: flex; gap: 2rem; justify-content: center; }
.nav__links a {
  font-size: 0.88rem; font-weight: 500; color: var(--ink-500);
  padding: 4px 0; border-bottom: 1.5px solid transparent;
  transition: all var(--dur-2) var(--ease);
}
.nav__links a:hover { color: var(--ink-950); border-color: var(--ink-300); }
.nav__trailing { display: flex; gap: 12px; align-items: center; }

.theme-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; padding: 0;
  color: var(--ink-500);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: color var(--dur-2) var(--ease),
              background var(--dur-2) var(--ease),
              border-color var(--dur-2) var(--ease);
}
.theme-toggle:hover {
  color: var(--ink-950);
  border-color: var(--ink-500);
  background: var(--paper-soft);
}
.theme-toggle:focus-visible { outline: none; box-shadow: var(--ring-focus); }
.theme-toggle__icon { display: none; }
[data-theme="light"] .theme-toggle__icon--moon { display: block; }
[data-theme="dark"]  .theme-toggle__icon--sun  { display: block; }

/* ---------- Hero ---------- */
.hero {
  padding: 5.5rem 0 5rem;
  border-bottom: 1px solid var(--border);
  position: relative;
}
.hero__inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4rem;
  align-items: end;
  position: relative;
  z-index: 1;
}
.hero__name {
  font-size: clamp(4rem, 9vw, 7.5rem);
  line-height: 0.92;
  letter-spacing: -0.04em;
  margin: 0 0 1.5rem;
}
.hero__name em {
  font-style: italic;
  color: var(--accent-500);
}
.hero__bio {
  font-size: 1.1rem;
  line-height: 1.7;
  color: var(--ink-700);
  max-width: 46ch;
  margin: 0 0 2rem;
}
.hero__links {
  display: flex; gap: 1.25rem; align-items: center;
}
.hero__links a {
  font-size: 0.9rem; font-weight: 500;
  color: var(--ink-500);
  border-bottom: 1px solid var(--border);
  padding-bottom: 2px;
  transition: color var(--dur-2) var(--ease), border-color var(--dur-2) var(--ease);
}
.hero__links a:hover { color: var(--accent-600); border-color: var(--accent-500); }
.hero__links .sep { color: var(--ink-100); font-size: 0.8rem; }

.hero__avatar-wrap {
  position: relative;
  flex-shrink: 0;
  width: 220px; height: 300px;
}
.hero__avatar {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  border-radius: var(--radius-lg);
  object-fit: cover; object-position: center 35%;
  display: block;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-2);
  transition: opacity 0.4s var(--ease), box-shadow var(--dur-3) var(--ease);
}
.hero__avatar:hover { box-shadow: var(--shadow-3); }
.hero__avatar--hidden { opacity: 0; pointer-events: none; }
.hero__avatar--visible { opacity: 1; }
.hero__avatar-wrap::before {
  content: "";
  position: absolute;
  inset: -8px;
  border: 1px solid var(--border-soft);
  border-radius: calc(var(--radius-lg) + 4px);
  pointer-events: none;
}

/* ---------- Section header ---------- */
.section-header {
  display: flex; align-items: baseline; gap: 1.5rem;
  margin-bottom: 2.5rem;
  padding-top: 4rem;
}
.section-header__label {
  font-family: var(--font-mono); font-size: 11px;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--ink-500);
}
.section-header__rule {
  flex: 1; height: 1px; background: var(--border);
}

/* ---------- Tool cards ---------- */
.tool-stack {
  display: flex; flex-direction: column; gap: 1px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 5rem;
}
.tool-card {
  display: grid; grid-template-columns: 1fr 260px; gap: 0;
  background: var(--surface); color: var(--ink-900);
  text-decoration: none;
  position: relative;
  transition: background var(--dur-2) var(--ease);
  border-bottom: 1px solid var(--border);
}
.tool-card:last-child { border-bottom: none; }
.tool-card::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 4px;
  background: var(--accent-500);
  transform: scaleY(0);
  transform-origin: bottom;
  transition: transform var(--dur-3) var(--ease);
}
.tool-card:hover::before { transform: scaleY(1); }
.tool-card:hover { background: var(--paper); }

.tool-card__body {
  padding: 2rem 2.25rem;
  display: flex; flex-direction: column;
  min-width: 0;
}
.tool-card__meta {
  display: flex; flex-wrap: wrap; gap: 6px;
  margin-bottom: 1rem;
}
.tool-card__meta-tag {
  font-family: var(--font-mono); font-size: 10px;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--accent-700);
  padding: 2px 8px;
  background: var(--accent-100);
  border: 1px solid color-mix(in oklab, var(--accent-500) 30%, transparent);
  border-radius: var(--radius-xs);
  font-weight: 500;
}
[data-theme="dark"] .tool-card__meta-tag {
  background: color-mix(in oklab, var(--accent-100) 40%, transparent);
}
.tool-card h3 {
  font-size: clamp(1.6rem, 2.5vw, 2rem);
  line-height: 1.05; letter-spacing: -0.02em;
  margin: 0 0 0.6rem;
  font-family: var(--font-display); font-weight: 400;
}
.tool-card__desc {
  font-size: 0.95rem; line-height: 1.65;
  color: var(--ink-500);
  max-width: 44ch;
  flex: 1;
  margin: 0;
}
.tool-card__footer {
  margin-top: 1.5rem;
  display: flex; align-items: center; gap: 1rem;
  flex-wrap: wrap;
}
.tool-card__cta {
  display: inline-flex; align-items: center; gap: 6px;
  font-weight: 500; font-size: 0.88rem;
  color: var(--ink-950);
  transition: gap var(--dur-2) var(--ease), color var(--dur-2) var(--ease);
}
.tool-card:hover .tool-card__cta {
  gap: 10px;
  color: var(--accent-600);
}
.tool-card__cta-arrow {
  font-size: 1rem;
  transition: transform var(--dur-2) var(--ease);
}
.tool-card:hover .tool-card__cta-arrow { transform: translateX(3px); }
.tool-card__status {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--font-mono); font-size: 10px;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--ink-500);
}
.status-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 0 2px color-mix(in oklab, var(--success) 25%, transparent);
}
.status-dot--invite { background: var(--accent-500); box-shadow: 0 0 0 2px color-mix(in oklab, var(--accent-500) 25%, transparent); }
.status-dot--personal { background: var(--ink-300); box-shadow: 0 0 0 2px color-mix(in oklab, var(--ink-300) 25%, transparent); }

.tool-card__year {
  font-family: var(--font-mono); font-size: 10px;
  color: var(--ink-300); letter-spacing: 0.06em;
  margin-left: auto;
}

.tool-card__preview {
  background-color: var(--paper-soft);
  background-image:
    linear-gradient(to right,  rgba(13,15,12,0.055) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(13,15,12,0.055) 1px, transparent 1px);
  background-size: 14px 14px;
  border-left: 1px solid var(--border);
  display: grid; place-items: center;
  padding: 2rem;
  overflow: hidden;
  position: relative;
  color: var(--ink-700);
  transition: background-color var(--dur-2) var(--ease);
}
[data-theme="dark"] .tool-card__preview {
  background-color: var(--paper-deep);
  background-image:
    linear-gradient(to right,  rgba(242,245,240,0.06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(242,245,240,0.06) 1px, transparent 1px);
}
.tool-card:hover .tool-card__preview { background-color: var(--paper-deep); }
[data-theme="dark"] .tool-card:hover .tool-card__preview { background-color: var(--paper-soft); }
.tool-card__preview svg {
  height: 100%; width: auto; max-width: 100%;
}

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 0 2.5rem;
}
.footer__inner {
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 1rem;
}
.footer__brand {
  font-family: var(--font-display); font-size: 1.1rem;
  color: var(--ink-500); display: flex; align-items: baseline; gap: 5px;
}
.footer__brand .dot {
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--accent-600); display: inline-block;
  transform: translateY(-1px);
}
.footer__meta {
  display: flex; gap: 2rem; align-items: center;
  font-family: var(--font-mono); font-size: 10px;
  color: var(--ink-300); letter-spacing: 0.1em; text-transform: uppercase;
}
.footer__meta a:hover { color: var(--ink-500); }

/* ---------- Scroll-in animations ---------- */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.55s var(--ease), transform 0.55s var(--ease);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.08s; }
.reveal-delay-2 { transition-delay: 0.16s; }
.reveal-delay-3 { transition-delay: 0.24s; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- Responsive ---------- */
@media (max-width: 720px) {
  .hero { padding: 3.5rem 0 3.5rem; }
  .hero__inner { grid-template-columns: 1fr; gap: 2.5rem; }
  .hero__avatar-wrap { display: none; }
  .hero__name { font-size: clamp(3rem, 12vw, 4.5rem); }
  .nav__links { display: none; }
  .tool-card { grid-template-columns: 1fr; }
  .tool-card__preview { display: none; }
  .tool-stack { border-radius: var(--radius-md); }
  .footer__meta { gap: 1rem; flex-wrap: wrap; }
}