/* =========================================================
   Epoch Industries — styles.css
   Aesthetic: research paper × observatory × refined dark
   ========================================================= */

:root {
  /* Color */
  --bg:           #0A0A0D;
  --bg-warm:      #0C0B09;
  --surface:      #131319;
  --text:         #E8E2D5;
  --text-muted:   #7A7670;
  --text-dim:     #56524C;
  --text-faint:   #34322E;
  --accent:       #C5A572;   /* aged brass */
  --accent-warm:  #D9B988;
  --rule:         rgba(232, 226, 213, 0.08);
  --rule-strong:  rgba(232, 226, 213, 0.14);

  /* Type */
  --serif:  'Fraunces', 'Iowan Old Style', Georgia, serif;
  --mono:   'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  /* Rhythm */
  --gutter: clamp(1.25rem, 3vw, 2.5rem);
  --section-y: clamp(5rem, 12vh, 9rem);
  --max-w: 1440px;

  /* Motion */
  --ease-out: cubic-bezier(0.16, 0.84, 0.32, 1);
}

* { box-sizing: border-box; }
*::selection { background: var(--accent); color: var(--bg); }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--serif);
  font-weight: 300;
  font-size: 17px;
  line-height: 1.55;
  font-optical-sizing: auto;
  font-variation-settings: "SOFT" 50;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  position: relative;
}

a { color: inherit; text-decoration: none; }
p { margin: 0; }
h1, h2, h3 { margin: 0; font-weight: 400; }

.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;
}

/* =========================================================
   Atmosphere — grid, vignette, grain
   ========================================================= */
.atmosphere {
  position: fixed; inset: 0;
  pointer-events: none;
  z-index: 0;
}

.grid-overlay {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, var(--rule) 1px, transparent 1px),
    linear-gradient(to bottom, var(--rule) 1px, transparent 1px);
  background-size: 96px 96px;
  background-position: center center;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 40%, #000 0%, transparent 85%);
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 40%, #000 0%, transparent 85%);
  opacity: 0.55;
}

.vignette {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 70% 50% at 50% 0%, rgba(197, 165, 114, 0.06), transparent 70%),
    radial-gradient(ellipse 90% 60% at 50% 100%, rgba(10, 10, 13, 0.7), transparent 70%);
}

.noise {
  position: absolute; inset: 0;
  opacity: 0.05;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 1  0 0 0 0 1  0 0 0 0 1  0 0 0 0.5 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* =========================================================
   Layout container
   ========================================================= */
main, .masthead, .colophon {
  position: relative;
  z-index: 1;
}

/* Page-grid: marginalia | content | marginalia */
.section, .hero {
  display: grid;
  grid-template-columns:
    minmax(var(--gutter), 1fr)
    minmax(0, 14rem)
    minmax(0, 56rem)
    minmax(0, 14rem)
    minmax(var(--gutter), 1fr);
  column-gap: clamp(1rem, 3vw, 3rem);
  width: 100%;
}

/* =========================================================
   Masthead
   ========================================================= */
.masthead {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.15rem clamp(1.25rem, 3vw, 2.5rem);
  background: linear-gradient(to bottom, rgba(10, 10, 13, 0.88) 0%, rgba(10, 10, 13, 0.6) 80%, transparent 100%);
  backdrop-filter: blur(8px) saturate(120%);
  -webkit-backdrop-filter: blur(8px) saturate(120%);
  border-bottom: 1px solid var(--rule);
}

.mark {
  display: inline-flex;
  align-items: baseline;
  gap: 0.7rem;
}

.mark-glyph {
  color: var(--accent);
  font-size: 0.8rem;
  transform: translateY(-1px);
  animation: gentle-pulse 4s ease-in-out infinite;
}

@keyframes gentle-pulse {
  0%, 100% { opacity: 0.6; }
  50%      { opacity: 1; }
}

.mark-name {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--text);
}

/* =========================================================
   Hero
   ========================================================= */
.hero {
  min-height: 100vh;
  padding-top: clamp(8rem, 18vh, 12rem);
  padding-bottom: calc(var(--section-y) + 3vh);
  align-content: center;
  row-gap: clamp(2.5rem, 6vh, 4rem);
  position: relative;
}

.marginalia {
  grid-column: 2;
  align-self: end;
  padding-bottom: 0.5rem;
  border-left: 1px solid var(--rule);
  padding-left: 1.1rem;
  max-width: 22ch;
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.5;
  font-style: normal;
  opacity: 0;
  transform: translateY(8px);
  animation: appear 1.2s 1.2s var(--ease-out) forwards;
}

.marginalia .ref {
  color: var(--accent);
  font-style: italic;
  font-family: var(--serif);
  margin-right: 0.3em;
  font-size: 1.05em;
}

.marginalia em {
  color: var(--text);
  font-style: italic;
  font-weight: 400;
}

.marginalia .ipa {
  color: var(--text-dim);
  font-style: italic;
  font-family: var(--serif);
}

.marginalia .pos {
  color: var(--text-dim);
  font-style: italic;
}

.marginalia .mono.small {
  font-size: 0.7em;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-right: 0.25em;
}

.display {
  grid-column: 3;
  font-family: var(--serif);
  font-size: clamp(2.15rem, 8vw, 7.25rem);
  line-height: 0.97;
  letter-spacing: -0.035em;
  font-weight: 300;
  font-variation-settings: "SOFT" 30, "opsz" 144;
  color: var(--text);
  max-width: 14ch;
}

.display .line {
  display: block;
  opacity: 0;
  transform: translateY(28px);
  filter: blur(6px);
  animation: line-in 1.1s var(--ease-out) forwards;
}

.display .line[data-line="1"] { animation-delay: 0.20s; }
.display .line[data-line="2"] { animation-delay: 0.35s; }
.display .line[data-line="3"] { animation-delay: 0.50s; }
.display .line[data-line="4"] { animation-delay: 0.65s; }
.display .line[data-line="5"] { animation-delay: 0.80s; }

.display em {
  font-style: italic;
  font-weight: 400;
  color: var(--accent);
  font-variation-settings: "SOFT" 100, "opsz" 144;
}

@keyframes line-in {
  to { opacity: 1; transform: translateY(0); filter: blur(0); }
}

@keyframes appear {
  to { opacity: 1; transform: translateY(0); }
}

.hero-meta {
  grid-column: 3;
  font-family: var(--mono);
  color: var(--text-dim);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-size: 0.68rem;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
  width: fit-content;
  opacity: 0;
  transform: translateY(8px);
  animation: appear 1.2s 1.4s var(--ease-out) forwards;
}

/* =========================================================
   Sections (Practice / Portfolio / Correspondence)
   ========================================================= */
.section {
  padding-top: var(--section-y);
  padding-bottom: var(--section-y);
  border-top: 1px solid var(--rule);
  position: relative;
}

.section-head {
  grid-column: 2;
  position: sticky;
  top: 6rem;
  align-self: start;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding-top: 0.35rem;
}

.section-body {
  grid-column: 3;
  max-width: 52rem;
}

/* Practice */
.practice .lede {
  font-family: var(--serif);
  font-size: clamp(1.5rem, 2.8vw, 2.15rem);
  line-height: 1.25;
  letter-spacing: -0.012em;
  font-weight: 300;
  font-style: italic;
  font-variation-settings: "SOFT" 80, "opsz" 96;
  color: var(--text);
  margin-bottom: 2.25rem;
  max-width: 28ch;
}

.practice .section-body p:not(.lede) {
  font-size: 1.12rem;
  line-height: 1.65;
  color: var(--text);
  max-width: 56ch;
  margin-bottom: 1.4rem;
}

.practice .section-body p em {
  font-style: italic;
  color: var(--accent-warm);
}

/* Portfolio */
.entries {
  display: grid;
  gap: clamp(3rem, 6vh, 5rem);
}

.entry {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.85rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
  position: relative;
}

.entry-meta {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  align-items: baseline;
}

.entry-meta .mono { font-size: 0.68rem; letter-spacing: 0.18em; text-transform: uppercase; }
.entry-meta .accent { color: var(--accent); }
.entry-meta .dim    { color: var(--text-dim); }

.entry-title {
  font-family: var(--serif);
  font-size: clamp(2.5rem, 5.5vw, 4.25rem);
  line-height: 1;
  letter-spacing: -0.025em;
  font-weight: 300;
  font-style: italic;
  font-variation-settings: "SOFT" 100, "opsz" 144;
  color: var(--text);
}

.entry-sub {
  font-family: var(--mono);
  font-style: normal;
  font-size: 0.32em;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  vertical-align: middle;
  margin-left: 0.55em;
  color: var(--accent);
  position: relative;
  top: -0.45em;
}

.entry-desc {
  font-size: 1.08rem;
  line-height: 1.6;
  color: var(--text-muted);
  max-width: 52ch;
  margin-top: 0.35rem;
}

.entry-link {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  width: fit-content;
  margin-top: 0.6rem;
  padding-bottom: 4px;
  border-bottom: 1px solid rgba(197, 165, 114, 0.4);
  transition: border-color .25s var(--ease-out), color .25s var(--ease-out), letter-spacing .35s var(--ease-out);
}

.entry-link:hover {
  color: var(--accent-warm);
  border-color: var(--accent-warm);
  letter-spacing: 0.22em;
}

.entry.placeholder .placeholder-title {
  color: var(--text-faint);
  font-style: normal;
  letter-spacing: 0.3em;
  font-size: clamp(2rem, 4vw, 3rem);
}

.entry .dim { color: var(--text-dim); }

/* Correspondence */
.correspondence .contact-intro {
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(1.25rem, 2.2vw, 1.6rem);
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  font-variation-settings: "SOFT" 80;
}

.email {
  display: inline-block;
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(1.8rem, 5.5vw, 3.75rem);
  line-height: 1.1;
  letter-spacing: -0.025em;
  font-weight: 300;
  font-variation-settings: "SOFT" 60, "opsz" 144;
  color: var(--accent);
  border-bottom: 1px solid var(--rule);
  padding-bottom: 0.18em;
  transition: border-color .4s var(--ease-out), color .3s var(--ease-out);
}

.email:hover {
  color: var(--accent-warm);
  border-bottom-color: var(--accent-warm);
}

.email .email-text { display: inline-block; }

/* =========================================================
   Colophon (footer)
   ========================================================= */
.colophon {
  padding: 3.5rem clamp(1.25rem, 3vw, 2.5rem) 2rem;
  border-top: 1px solid var(--rule);
  background: linear-gradient(to bottom, transparent, rgba(10, 10, 13, 0.6));
}

.colophon-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.colophon-row .dim   { color: var(--text-dim); }
.colophon-row .faint { color: var(--text-faint); }

.colophon-rule {
  height: 1px;
  background: var(--rule);
  margin: 1.5rem 0;
}

/* =========================================================
   Mono helpers
   ========================================================= */
.mono {
  font-family: var(--mono);
}

.mono.small {
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

/* =========================================================
   Alumni credentials — static row, leading label on the left
   ========================================================= */
.alumni {
  position: relative;
  padding: 2.25rem clamp(1.25rem, 3vw, 2.5rem) 2.4rem;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  background: linear-gradient(to bottom, transparent, rgba(255, 255, 255, 0.012), transparent);
}

.alumni-inner {
  display: flex;
  align-items: center;
  gap: clamp(2rem, 4vw, 3.5rem);
  max-width: 1280px;
  margin: 0 auto;
}

.alumni-label {
  margin: 0;
  flex-shrink: 0;
  font-family: var(--mono);
  font-size: 0.62rem;
  line-height: 1.55;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--text);
  padding-right: clamp(1rem, 2vw, 1.75rem);
  border-right: 1px solid var(--rule);
}

.alumni-logos {
  display: flex;
  align-items: center;
  justify-content: space-around;
  gap: clamp(1.35rem, 2.7vw, 2.7rem);
  flex: 1;
  flex-wrap: wrap;
}

/* Logo image wordmarks.
   Sources are pre-converted to white-on-transparent PNGs; no filter or
   blend mode is needed at render time. Uniform height across all five
   marks for an even baseline. */
img.wordmark {
  display: block;
  height: 29px;
  width: auto;
  max-width: none;
  opacity: 0.5;
  user-select: none;
  -webkit-user-drag: none;
  transition: opacity .35s var(--ease-out);
}

img.wordmark:hover { opacity: 0.95; }

/* Chicago's logo greyscales darker than the others — give it
   slightly more presence than the global -20% step. */
img.wm-chicago { opacity: 0.56; }

/* =========================================================
   Gradual blur — vanilla port of react-bits/GradualBlur
   Four absolutely-positioned layers, each masked to a horizontal
   slice with exponentially increasing backdrop-blur strength.
   ========================================================= */
.gradual-blur {
  position: fixed;
  left: 0; right: 0;
  bottom: 0;
  height: 6rem;
  z-index: 40;
  pointer-events: none;
  opacity: 1;
  transition: opacity .35s var(--ease-out);
}

.gb-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.gb-layer:nth-child(1) {
  backdrop-filter: blur(0.6px);
  -webkit-backdrop-filter: blur(0.6px);
  mask-image: linear-gradient(to bottom,
    rgba(0,0,0,1) 0%,
    rgba(0,0,0,1) 22%,
    rgba(0,0,0,0) 30%);
  -webkit-mask-image: linear-gradient(to bottom,
    rgba(0,0,0,1) 0%,
    rgba(0,0,0,1) 22%,
    rgba(0,0,0,0) 30%);
}

.gb-layer:nth-child(2) {
  backdrop-filter: blur(1.8px);
  -webkit-backdrop-filter: blur(1.8px);
  mask-image: linear-gradient(to bottom,
    rgba(0,0,0,0) 18%,
    rgba(0,0,0,1) 28%,
    rgba(0,0,0,1) 50%,
    rgba(0,0,0,0) 58%);
  -webkit-mask-image: linear-gradient(to bottom,
    rgba(0,0,0,0) 18%,
    rgba(0,0,0,1) 28%,
    rgba(0,0,0,1) 50%,
    rgba(0,0,0,0) 58%);
}

.gb-layer:nth-child(3) {
  backdrop-filter: blur(4.5px);
  -webkit-backdrop-filter: blur(4.5px);
  mask-image: linear-gradient(to bottom,
    rgba(0,0,0,0) 46%,
    rgba(0,0,0,1) 56%,
    rgba(0,0,0,1) 76%,
    rgba(0,0,0,0) 82%);
  -webkit-mask-image: linear-gradient(to bottom,
    rgba(0,0,0,0) 46%,
    rgba(0,0,0,1) 56%,
    rgba(0,0,0,1) 76%,
    rgba(0,0,0,0) 82%);
}

.gb-layer:nth-child(4) {
  backdrop-filter: blur(11px);
  -webkit-backdrop-filter: blur(11px);
  mask-image: linear-gradient(to bottom,
    rgba(0,0,0,0) 72%,
    rgba(0,0,0,1) 84%,
    rgba(0,0,0,1) 100%);
  -webkit-mask-image: linear-gradient(to bottom,
    rgba(0,0,0,0) 72%,
    rgba(0,0,0,1) 84%,
    rgba(0,0,0,1) 100%);
}

/* Fade out when colophon is near — keeps footer readable */
.gradual-blur.near-bottom { opacity: 0; }

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width: 900px) {
  .section, .hero {
    grid-template-columns: minmax(var(--gutter), 1fr) minmax(0, 56rem) minmax(var(--gutter), 1fr);
  }

  .marginalia,
  .display,
  .hero-meta,
  .section-head,
  .section-body {
    grid-column: 2;
  }

  .marginalia {
    order: 2;
    align-self: start;
    padding-bottom: 0;
    margin-top: 2rem;
    max-width: 36ch;
  }

  .display { order: 1; }
  .hero-meta { order: 3; }

  .section-head {
    position: static;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--rule);
  }

  .grid-overlay { background-size: 64px 64px; }
}

@media (max-width: 560px) {
  .masthead {
    padding: 0.9rem 1.1rem;
  }

  .mark-name { font-size: 0.65rem; letter-spacing: 0.2em; }

  .colophon-row { font-size: 0.6rem; }

  .alumni { padding: 1.75rem 1.1rem 1.9rem; }
  .alumni-inner { flex-direction: column; align-items: flex-start; gap: 1.25rem; }
  .alumni-label {
    font-size: 0.58rem;
    letter-spacing: 0.26em;
    padding-right: 0;
    border-right: 0;
  }
  .alumni-logos { gap: 1.35rem 1.8rem; }
  img.wordmark { height: 22px; }

  .gradual-blur { height: 4.5rem; }
}

/* =========================================================
   Scroll reveal
   ========================================================= */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 1.1s var(--ease-out), transform 1.1s var(--ease-out);
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}
.hero.reveal { opacity: 1; transform: none; } /* hero animates via line-in instead */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .display .line { opacity: 1; transform: none; filter: none; }
  .marginalia, .hero-meta { opacity: 1; transform: none; }
  .reveal { opacity: 1; transform: none; }
}