/* =============================================================================
   1. DESIGN TOKENS
   ============================================================================= */
:root {
  /* color - near-white paper, warm-tinted neutrals, single warm accent */
  --paper:        #FAFAF7;
  --paper-2:      #F2F0EA;
  --surface:      #FFFFFF;
  --surface-2:    #F6F4EE;

  --ink:          #0F0E0C;
  --ink-2:        #2A2823;
  --ink-3:        #4A4640;
  --mute:         #7E7A72;
  --mute-2:       #ADA89E;

  --rule:         #E5E1D8;
  --rule-2:       #D4CFC2;

  --warm:         #B14A1A;       /* used sparingly: co-first asterisk + small accents */

  /* typography - one family for everything */
  --sans: 'Geist', system-ui, -apple-system, 'Segoe UI', sans-serif;

  /* layout */
  --max-w:       1200px;
  --content-w:   720px;
  --gutter:      clamp(1.25rem, 3vw, 3rem);
  --topbar-h:    64px;
  --section-y:   clamp(4.5rem, 9vw, 8rem);

  /* motion */
  --ease:       cubic-bezier(0.22, 1, 0.36, 1);
  --ease-snap:  cubic-bezier(0.4, 0, 0.2, 1);
  --t-fast:     200ms;
  --t-med:      420ms;
  --t-slow:     720ms;

  /* shadow - very soft, neutral */
  --shadow-sm:  0 1px 2px rgba(20, 18, 12, 0.04), 0 4px 12px -4px rgba(20, 18, 12, 0.06);
  --shadow-md:  0 2px 6px rgba(20, 18, 12, 0.05), 0 16px 32px -12px rgba(20, 18, 12, 0.10);
  --shadow-lg:  0 4px 12px rgba(20, 18, 12, 0.06), 0 32px 56px -20px rgba(20, 18, 12, 0.14);
}

/* =============================================================================
   2. RESET & BASE
   ============================================================================= */
*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16.5px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: 'ss01', 'ss03', 'cv11';
}

img, svg { max-width: 100%; height: auto; display: block; }
button     { font: inherit; cursor: pointer; border: 0; background: transparent; color: inherit; padding: 0; }
ul, ol     { list-style: none; padding: 0; margin: 0; }
a          { color: inherit; text-decoration: none; }

::selection { background: var(--ink); color: var(--paper); }

@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;
  }
}

/* =============================================================================
   3. ACCESSIBILITY
   ============================================================================= */
.skip-link {
  position: fixed;
  top: 12px; left: 12px;
  background: var(--ink);
  color: var(--paper);
  padding: 0.6rem 1rem;
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  border-radius: 4px;
  transform: translateY(-200%);
  transition: transform var(--t-fast) var(--ease-snap);
  z-index: 400;
}
.skip-link:focus { transform: translateY(0); }

#top { display: block; height: 0; }

#main:focus-visible { outline: none; }

.noscript {
  position: fixed; inset: 0;
  background: var(--paper);
  display: grid; place-items: center;
  padding: 2rem;
  font-size: 1.0625rem;
  text-align: center;
  z-index: 500;
}

/* =============================================================================
   4. LAYOUT
   ============================================================================= */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding-inline: var(--gutter);
}

#main { display: block; }

.section {
  position: relative;
  padding-block: calc(var(--section-y) * 0.55) calc(var(--section-y) * 0.65);
}

.section--hero {
  padding-block: clamp(2.5rem, 6vw, 5rem) calc(var(--section-y) * 0.4);
}

.section--footer {
  padding-block: calc(var(--section-y) * 0.55) calc(var(--section-y) * 0.35);
}

/* =============================================================================
   5. TOPBAR
   ============================================================================= */
.topbar {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--topbar-h);
  z-index: 100;
  background: rgba(250, 250, 247, 0.78);
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  border-bottom: 1px solid transparent;
  transform: translateY(-110%);
  transition:
    transform var(--t-med) var(--ease),
    border-color var(--t-med) var(--ease),
    background var(--t-med) var(--ease);
}

.topbar[data-state="visible"] {
  transform: translateY(0);
  border-bottom-color: var(--rule);
  background: rgba(250, 250, 247, 0.86);
}

.topbar__progress {
  position: absolute;
  inset: auto 0 0 0;
  height: 1px;
  background: var(--ink);
  transform-origin: left center;
  transform: scaleX(0);
  opacity: 0.85;
  transition: transform 80ms linear;
}

.topbar__inner {
  height: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding-inline: var(--gutter);
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: clamp(1rem, 3vw, 2rem);
}

.topbar__identity {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
}

.topbar__photo {
  width: 28px; height: 28px;
  border-radius: 50%;
  overflow: hidden;
  background: var(--surface-2);
  box-shadow: inset 0 0 0 1px var(--rule);
  flex: none;
}
.topbar__photo img { width: 100%; height: 100%; object-fit: cover; }

.topbar__name {
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: -0.005em;
  color: var(--ink);
}

.topbar__nav {
  display: flex;
  gap: clamp(0.75rem, 2vw, 1.75rem);
  justify-self: center;
}

.topbar__nav a {
  font-size: 0.875rem;
  font-weight: 450;
  color: var(--ink-3);
  letter-spacing: 0.005em;
  padding: 0.4rem 0.1rem;
  position: relative;
  transition: color var(--t-fast) var(--ease);
}

.topbar__nav a::after {
  content: '';
  position: absolute;
  inset: auto 0 -2px 0;
  height: 1px;
  background: var(--ink);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--t-med) var(--ease);
}

.topbar__nav a:hover { color: var(--ink); }
.topbar__nav a:hover::after,
.topbar__nav a.is-active::after { transform: scaleX(1); }

.topbar__actions { justify-self: end; }

@media (max-width: 760px) {
  .topbar__nav { display: none; }
  .topbar__inner { grid-template-columns: auto 1fr auto; }
}

/* =============================================================================
   6. BUTTONS / LINKS
   ============================================================================= */
.btn {
  --bg: var(--ink);
  --fg: var(--paper);
  --bd: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.15rem 0.75rem 1.3rem;
  background: var(--bg);
  color: var(--fg);
  border: 1px solid var(--bd);
  border-radius: 999px;
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: -0.005em;
  line-height: 1;
  text-decoration: none;
  transition:
    background var(--t-fast) var(--ease-snap),
    color      var(--t-fast) var(--ease-snap),
    border-color var(--t-fast) var(--ease-snap),
    transform  var(--t-fast) var(--ease-snap);
}

.btn--ghost   { --bg: transparent;  --fg: var(--ink);   --bd: var(--rule-2); }
.btn--primary { --bg: var(--ink);   --fg: var(--paper); --bd: var(--ink);   }

.btn--small {
  padding: 0.5rem 0.85rem 0.5rem 0.95rem;
  font-size: 0.8125rem;
}

.btn:hover                  { transform: translateY(-1px); }
.btn--primary:hover         { background: var(--ink-2); }
.btn--ghost:hover           { background: var(--surface); --bd: var(--ink-3); }

.btn__arrow {
  display: inline-block;
  transition: transform var(--t-fast) var(--ease-snap);
}
.btn:hover .btn__arrow { transform: translateX(2px); }

/* small inline link button (.link-btn) is defined in views.css */

/* =============================================================================
   7. SECTION HEADERS
   ============================================================================= */
.section__head {
  margin-bottom: clamp(2rem, 4vw, 3rem);
  max-width: 64ch;
}

.section__title {
  font-weight: 500;
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  line-height: 1.06;
  letter-spacing: -0.025em;
  color: var(--ink);
  margin: 0;
}

.section__lede {
  font-size: 1.0625rem;
  font-weight: 400;
  color: var(--ink-3);
  max-width: 56ch;
  margin: 1rem 0 0;
  line-height: 1.55;
  letter-spacing: -0.005em;
}

/* =============================================================================
   8. REVEAL ANIMATIONS - single fade as content scrolls into view, no stagger
   ============================================================================= */
[data-reveal] {
  opacity: 0;
  transform: translateY(8px);
  transition:
    opacity var(--t-med) var(--ease),
    transform var(--t-med) var(--ease);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; transform: none; }
}