/* ============================================================
   Jake Self — Architectural Portfolio
   Aesthetic: warm cream paper, refined sans + serif, monospace tags
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Geist:wght@300;400;500;600&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  /* warm paper palette */
  --paper:        oklch(96% 0.012 75);
  --paper-deep:   oklch(92% 0.014 70);
  --paper-fold:   oklch(88% 0.016 68);
  --ink:          oklch(22% 0.012 60);
  --ink-soft:     oklch(38% 0.012 60);
  --ink-mute:     oklch(55% 0.012 60);
  --rule:         oklch(80% 0.014 70);
  --timber:       oklch(58% 0.10 55);
  --timber-deep:  oklch(42% 0.09 50);
  --sage:         oklch(48% 0.04 130);

  /* type — all sans */
  --sans:  'Geist', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --serif: 'Geist', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --mono:  'JetBrains Mono', 'IBM Plex Mono', ui-monospace, monospace;

  /* scale */
  --gutter: clamp(20px, 4vw, 56px);
  --col: minmax(0, 1fr);
}

* { box-sizing: border-box; }

html {
  /* Background extends past the 2000px body cap on ultrawide displays
     so the page never looks like a floating card on a void. */
  background: var(--paper);
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "ss01", "kern", "liga";
  overflow-x: hidden;
}

body {
  /* Cap the site to 2000px and center it on ultrawide monitors. */
  max-width: 2000px;
  margin-inline: auto;
  position: relative;
}

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

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

/* ============================================================
   TYPOGRAPHY UTILITIES
   ============================================================ */

.serif    { font-family: var(--sans); font-weight: 400; letter-spacing: -0.01em; }
.serif-it { font-family: var(--sans); font-style: normal; font-weight: 300; letter-spacing: -0.005em; }
.mono     { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.06em; text-transform: uppercase; }
.tag      { font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.10em; text-transform: uppercase; color: var(--ink-soft); }

h1, h2, h3, h4 { margin: 0; font-weight: 400; }

.display {
  font-family: var(--sans);
  font-weight: 300;
  font-size: clamp(48px, 8vw, 120px);
  line-height: 0.95;
  letter-spacing: -0.035em;
  text-wrap: balance;
}

.eyebrow {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--timber);
}

/* ============================================================
   LAYOUT
   ============================================================ */

.shell {
  width: 100%;
  padding: 0 var(--gutter);
}

.rule {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 0;
}

.rule-thick { border-top-width: 2px; border-top-color: var(--ink); }

/* ============================================================
   TOP BAR / SIDE NAV
   ============================================================ */

.topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  background: color-mix(in oklch, var(--paper) 88%, transparent);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--rule);
  transition: opacity 420ms ease, transform 420ms cubic-bezier(.2, .7, .2, 1);
}
/* On ultrawide screens, keep the topbar bar itself full-bleed but cap its
   inner content to 2000px so the gutters line up with the rest of the page. */
.topbar-inner {
  max-width: 2000px;
  margin-inline: auto;
}
.topbar.is-hidden {
  opacity: 0;
  transform: translateY(-100%);
  pointer-events: none;
}
.topbar.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.topbar-inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 14px var(--gutter);
  gap: 24px;
}
.topbar-mark {
  font-family: var(--sans);
  font-style: normal;
  font-weight: 300;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}
.topbar-center {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-mute);
  text-align: center;
}
.topbar-nav {
  display: flex;
  justify-content: flex-end;
  gap: 28px;
}
.topbar-nav a {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-soft);
  transition: color 160ms;
  position: relative;
}
.topbar-nav a:hover { color: var(--ink); }

.topbar-resume {
  border: 1px solid currentColor;
  padding: 4px 10px;
  border-radius: 1px;
  color: var(--ink-soft) !important;
  transition: color 180ms ease, background 180ms ease;
  margin-left: 4px;
}
.topbar-resume:hover {
  color: var(--ink) !important;
  background: rgba(0,0,0,0.04);
}
.topbar-nav a.active::after {
  content: '';
  position: absolute;
  left: 0; right: 0;
  bottom: -6px;
  height: 1px;
  background: var(--ink);
}

/* Topbar responsiveness — keep readable from 320px wide. */
@media (max-width: 860px) {
  .topbar-inner { grid-template-columns: 1fr auto; gap: 16px; padding: 12px var(--gutter); }
  .topbar-center { display: none; }
  .topbar-nav { gap: 18px; }
}
@media (max-width: 560px) {
  .topbar-nav { gap: 14px; }
  .topbar-nav a { font-size: 0.6rem; letter-spacing: 0.14em; }
  .topbar-resume { padding: 3px 8px; }
}
@media (max-width: 400px) {
  .topbar-resume { display: none; }
}

/* ============================================================
   FOOTER
   ============================================================ */

.foot {
  margin-top: 80px;
  padding: 24px var(--gutter);
  border-top: 1px solid var(--rule);
  display: flex;
  align-items: center;
  gap: 40px;
}
.foot-mark {
  font-family: var(--sans);
  font-style: normal;
  font-weight: 300;
  font-size: 1rem;
  white-space: nowrap;
}
.foot-links {
  display: flex;
  align-items: center;
  gap: 20px;
  flex: 1;
}
.foot-links a {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--ink-mute);
  transition: color 160ms;
}
.foot-links a:hover { color: var(--ink); }
.foot-divider {
  color: var(--ink-mute);
  font-family: var(--mono);
  font-size: 0.66rem;
  opacity: 0.4;
}
.foot-copy {
  color: var(--ink-mute);
  white-space: nowrap;
  margin-left: auto;
}

@media (max-width: 720px) {
  .foot { flex-wrap: wrap; gap: 16px; }
  .foot-copy { margin-left: 0; }
}

/* ============================================================
   PARALLAX HELPER
   ============================================================ */

.parallax-wrap { overflow: hidden; }
.parallax {
  will-change: transform;
  transform: translate3d(0, var(--py, 0), 0);
}

/* ============================================================
   IMAGE PLACEHOLDERS
   ============================================================ */

.placeholder {
  background:
    repeating-linear-gradient(45deg,
      var(--paper-fold) 0px, var(--paper-fold) 6px,
      var(--paper-deep) 6px, var(--paper-deep) 12px);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-mute);
}