/* ==========================================================================
   Franklin Clodfelter — security portfolio
   Palette derives from oxidized bronze: metal, patina, ember.
   Depth is literal: page ground darkens as you descend the architecture.
   ========================================================================== */

:root {
  /* ground */
  --abyss:      #0B0F14;
  --surface-00: #151C24;
  --surface-01: #111820;
  --surface-02: #0D141B;
  --surface-03: #080C11;
  --raised:     #1A222C;
  --raised-hi:  #212B36;

  /* accents */
  --bronze:     #C08A4E;
  --bronze-dim: #8A6236;
  --bronze-lo:  rgba(192, 138, 78, 0.14);
  --patina:     #4E8C7C;
  --patina-lo:  rgba(78, 140, 124, 0.14);
  --ember:      #E0603A;
  --ember-lo:   rgba(224, 96, 58, 0.14);

  /* type */
  --parchment:  #E8E3D9;
  --muted:      #93A0AC;
  --faint:      #64717E;
  --rule:       rgba(232, 227, 217, 0.10);
  --rule-hi:    rgba(232, 227, 217, 0.20);

  --display: "Bricolage Grotesque", "Arial Narrow", sans-serif;
  --body:    "IBM Plex Sans", system-ui, -apple-system, sans-serif;
  --mono:    "JetBrains Mono", ui-monospace, "SF Mono", Consolas, monospace;

  --measure: 1080px;
  --gutter:  clamp(20px, 5vw, 56px);
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--abyss);
  color: var(--parchment);
  font-family: var(--body);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a { color: var(--bronze); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--parchment); }

:focus-visible {
  outline: 2px solid var(--bronze);
  outline-offset: 3px;
  border-radius: 2px;
}

.wrap {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.skip {
  position: absolute; left: -9999px;
  background: var(--bronze); color: var(--abyss);
  padding: 10px 16px; font-family: var(--mono); font-size: 13px; z-index: 100;
}
.skip:focus { left: 12px; top: 12px; }

/* --------------------------------------------------------------- type ---- */

h1, h2, h3, h4 {
  font-family: var(--display);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0;
}

.eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--bronze);
  margin: 0 0 20px;
}
.eyebrow--muted { color: var(--faint); }

.lead {
  font-size: clamp(18px, 2.1vw, 21px);
  line-height: 1.62;
  color: var(--muted);
  max-width: 62ch;
}

.mono { font-family: var(--mono); }

/* ---------------------------------------------------------------- nav ---- */

.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(11, 15, 20, 0.86);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--rule);
}
.nav__inner {
  max-width: var(--measure); margin: 0 auto;
  padding: 14px var(--gutter);
  display: flex; align-items: center; gap: 28px;
}
.nav__mark {
  font-family: var(--display);
  font-weight: 800; font-size: 17px; letter-spacing: -0.03em;
  color: var(--parchment); text-decoration: none;
  margin-right: auto;
}
.nav__mark span { color: var(--bronze); }
.nav__link {
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--muted); text-decoration: none;
  padding: 4px 0; border-bottom: 1px solid transparent;
  transition: color .18s ease, border-color .18s ease;
}
.nav__link:hover, .nav__link[aria-current="page"] {
  color: var(--parchment); border-bottom-color: var(--bronze);
}

/* -------------------------------------------------------------- hero ----- */

.hero {
  padding: clamp(64px, 11vw, 128px) 0 clamp(56px, 9vw, 104px);
  border-bottom: 1px solid var(--rule);
  background:
    radial-gradient(120% 90% at 15% -10%, rgba(192,138,78,0.09) 0%, transparent 55%),
    var(--abyss);
}
.hero__grid {
  display: grid; grid-template-columns: 1.15fr 0.85fr;
  gap: clamp(32px, 6vw, 72px); align-items: center;
}
.hero h1 {
  font-size: clamp(34px, 5.4vw, 62px);
  letter-spacing: -0.035em;
  margin-bottom: 26px;
  text-wrap: balance;
}
.hero h1 em {
  font-style: normal;
  color: var(--bronze);
}
.hero .lead { margin-bottom: 34px; }

.cta-row { display: flex; flex-wrap: wrap; gap: 12px; }

.btn {
  display: inline-flex; align-items: center; gap: 9px;
  font-family: var(--mono); font-size: 12.5px; letter-spacing: 0.07em;
  text-transform: uppercase; text-decoration: none;
  padding: 13px 22px; border: 1px solid var(--bronze-dim);
  color: var(--bronze); background: transparent;
  transition: background .18s ease, color .18s ease, border-color .18s ease;
}
.btn:hover { background: var(--bronze); border-color: var(--bronze); color: var(--abyss); }
.btn--ghost { border-color: var(--rule-hi); color: var(--muted); }
.btn--ghost:hover { background: transparent; border-color: var(--parchment); color: var(--parchment); }

/* stat strip */
.stats {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 1px; background: var(--rule);
  border: 1px solid var(--rule);
  margin-top: clamp(44px, 7vw, 72px);
}
.stat { background: var(--abyss); padding: 22px 20px; }
.stat__n {
  font-family: var(--display); font-weight: 700;
  font-size: clamp(24px, 3.2vw, 34px); letter-spacing: -0.03em;
  color: var(--parchment); display: block; line-height: 1.1;
}
.stat__l {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--faint); margin-top: 8px; display: block;
}

/* ------------------------------------------------- hero schematic (svg) -- */

.schematic { width: 100%; height: auto; }
.sc-band       { fill: var(--raised); stroke: var(--rule-hi); stroke-width: 1; }
.sc-band--gate { fill: var(--bronze-lo); stroke: var(--bronze-dim); }
.sc-band--pit  { fill: rgba(224,96,58,0.07); stroke: rgba(224,96,58,0.35); }
.sc-label      { font-family: var(--mono); font-size: 11px; fill: var(--parchment); letter-spacing: 0.06em; }
.sc-sub        { font-family: var(--mono); font-size: 9.5px; fill: var(--faint); letter-spacing: 0.1em; }
.sc-link       { stroke: var(--rule-hi); stroke-width: 1.5; fill: none; }
.sc-link--cut  { stroke: rgba(224,96,58,0.5); stroke-width: 1.5; stroke-dasharray: 4 5; fill: none; }
.sc-x          { stroke: var(--ember); stroke-width: 1.6; }
.sc-chip       { fill: rgba(232,227,217,0.06); stroke: var(--rule); }
.sc-chip-t     { font-family: var(--mono); font-size: 8.5px; fill: var(--muted); letter-spacing: 0.05em; }

/* ------------------------------------------------------- depth rail ------ */

.rail {
  position: fixed; left: 28px; top: 50%; transform: translateY(-50%);
  z-index: 40; display: none;
}
@media (min-width: 1240px) { .rail { display: block; } }

.rail__line {
  position: absolute; left: 5px; top: 6px; bottom: 6px;
  width: 1px; background: var(--rule-hi);
}
.rail__list { list-style: none; margin: 0; padding: 0; display: grid; gap: 26px; }
.rail__item { position: relative; display: flex; align-items: center; gap: 12px; }
.rail__dot {
  width: 11px; height: 11px; border: 1px solid var(--rule-hi);
  background: var(--abyss); flex: none;
  transition: background .3s ease, border-color .3s ease, transform .3s ease;
}
.rail__txt {
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--faint); white-space: nowrap;
  opacity: 0; transform: translateX(-6px);
  transition: opacity .3s ease, transform .3s ease, color .3s ease;
}
.rail__item.is-active .rail__dot {
  background: var(--bronze); border-color: var(--bronze); transform: scale(1.25);
}
.rail__item.is-active .rail__txt { opacity: 1; transform: none; color: var(--parchment); }

/* ------------------------------------------------------------ layers ----- */

.layer { padding: clamp(64px, 10vw, 112px) 0; border-bottom: 1px solid var(--rule); }
.layer--00 { background: var(--surface-00); }
.layer--01 { background: var(--surface-01); }
.layer--02 { background: var(--surface-02); }
.layer--03 { background: var(--surface-03); }

.layer__head {
  display: flex; align-items: baseline; gap: 16px;
  padding-bottom: 14px; margin-bottom: 34px;
  border-bottom: 1px solid var(--rule-hi);
  flex-wrap: wrap;
}
.layer__no {
  font-family: var(--mono); font-size: 12px; font-weight: 700;
  color: var(--bronze); letter-spacing: 0.1em;
}
.layer__name {
  font-family: var(--display); font-size: clamp(21px, 2.8vw, 28px);
  font-weight: 700; letter-spacing: -0.02em;
}
.layer__net {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.1em;
  color: var(--faint); margin-left: auto;
}
.layer__intro { max-width: 66ch; color: var(--muted); margin: 0 0 40px; }
.layer__intro strong { color: var(--parchment); font-weight: 500; }

/* ------------------------------------------------------------- cards ----- */

.cards { display: grid; gap: 20px; }
.cards--2 { grid-template-columns: repeat(2, 1fr); }

.card {
  display: block; position: relative;
  background: var(--raised); border: 1px solid var(--rule);
  padding: 30px 30px 26px; text-decoration: none; color: inherit;
  transition: border-color .22s ease, background .22s ease, transform .22s ease;
}
.card:hover {
  border-color: var(--bronze-dim); background: var(--raised-hi);
  transform: translateY(-2px); color: inherit;
}
.card::after {
  content: ""; position: absolute; left: 0; bottom: -1px; height: 1px;
  width: 0; background: var(--bronze); transition: width .3s ease;
}
.card:hover::after { width: 100%; }

.card--feature { padding: 38px 38px 34px; }
.card--feature .card__name { font-size: clamp(26px, 3.4vw, 38px); }

.card__top {
  display: flex; align-items: center; gap: 12px; margin-bottom: 16px;
  flex-wrap: wrap;
}
.card__kind {
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--faint);
}
.card__name {
  font-family: var(--display); font-size: clamp(21px, 2.6vw, 26px);
  font-weight: 700; letter-spacing: -0.025em; margin: 0 0 12px;
}
.card__desc { color: var(--muted); font-size: 15.5px; margin: 0 0 20px; max-width: 60ch; }
.card__tags { display: flex; flex-wrap: wrap; gap: 7px; }
.tag {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.06em;
  color: var(--muted); border: 1px solid var(--rule);
  padding: 4px 9px; white-space: nowrap;
}
.card__more {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--bronze); margin-top: 22px;
  display: inline-flex; align-items: center; gap: 8px;
}

/* status chips */
.chip {
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.12em;
  text-transform: uppercase; padding: 3px 9px; border: 1px solid;
  white-space: nowrap;
}
.chip--live    { color: var(--patina); border-color: rgba(78,140,124,0.45); background: var(--patina-lo); }
.chip--wip     { color: var(--bronze); border-color: var(--bronze-dim); background: var(--bronze-lo); }
.chip--sealed  { color: var(--ember);  border-color: rgba(224,96,58,0.45);  background: var(--ember-lo); }

/* -------------------------------------------------------- terminal ------- */

.term {
  background: #06090D; border: 1px solid var(--rule-hi);
  font-family: var(--mono); font-size: 12.5px; line-height: 1.85;
  padding: 22px 24px; overflow-x: auto; color: var(--muted);
  margin: 0;
}
.term__bar {
  display: flex; align-items: center; gap: 8px;
  border-bottom: 1px solid var(--rule); padding-bottom: 12px; margin-bottom: 14px;
  font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--faint);
}
.term b { color: var(--patina); font-weight: 500; }
.term i { color: var(--faint); font-style: normal; }
.term u { color: var(--ember); text-decoration: none; }
.term .p { color: var(--bronze); }

.mt-lg { margin-top: 32px; }

.figcap {
  font-family: var(--mono); font-size: 11px; line-height: 1.7;
  color: var(--faint); margin-top: 12px; letter-spacing: 0.02em;
}

/* --------------------------------------------------------- evidence ------ */

.section { padding: clamp(64px, 10vw, 112px) 0; border-bottom: 1px solid var(--rule); }
.section__head { margin-bottom: 44px; }
.section__head h2 {
  font-size: clamp(26px, 3.6vw, 40px); letter-spacing: -0.03em; margin-bottom: 16px;
}

.evidence { border-top: 1px solid var(--rule-hi); }
.ev {
  display: grid; grid-template-columns: 220px 1fr;
  gap: 28px; padding: 22px 0; border-bottom: 1px solid var(--rule);
}
.ev__k {
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--bronze); padding-top: 2px;
}
.ev__v { color: var(--muted); font-size: 15.5px; margin: 0; }
.ev__v strong { color: var(--parchment); font-weight: 500; }

/* ---------------------------------------------------------- case page ---- */

.case-hero {
  padding: clamp(56px, 9vw, 96px) 0 clamp(36px, 6vw, 56px);
  border-bottom: 1px solid var(--rule);
  background:
    radial-gradient(110% 80% at 10% -20%, rgba(192,138,78,0.10) 0%, transparent 60%),
    var(--abyss);
}
.case-hero h1 {
  font-size: clamp(36px, 6vw, 66px); letter-spacing: -0.04em; margin-bottom: 22px;
}
.case-hero .lead { max-width: 68ch; }

.meta {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 1px; background: var(--rule); border: 1px solid var(--rule);
  margin-top: 44px;
}
.meta__cell { background: var(--abyss); padding: 18px 20px; }
.meta__k {
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--faint); display: block; margin-bottom: 7px;
}
.meta__v { font-size: 14.5px; color: var(--parchment); display: block; line-height: 1.45; }

.cta-row--case { margin-top: 30px; }

.case { padding: clamp(48px, 8vw, 84px) 0; }
.case__body { max-width: 74ch; }
.case__body h2 {
  font-size: clamp(23px, 3vw, 31px); letter-spacing: -0.025em;
  margin: 56px 0 18px; padding-top: 26px; border-top: 1px solid var(--rule-hi);
}
.case__body h2:first-child { margin-top: 0; padding-top: 0; border-top: 0; }
.case__body h3 {
  font-size: 18px; letter-spacing: -0.01em; margin: 34px 0 12px; color: var(--parchment);
}
.case__body p { color: var(--muted); margin: 0 0 18px; }
.case__body strong { color: var(--parchment); font-weight: 500; }
.case__body ul { color: var(--muted); padding-left: 20px; margin: 0 0 20px; }
.case__body li { margin-bottom: 10px; }
.case__body li::marker { color: var(--bronze); }
.case__body figure { margin: 28px 0; }

.callout {
  border-left: 2px solid var(--bronze);
  background: var(--bronze-lo);
  padding: 20px 24px; margin: 28px 0;
}
.callout p { margin: 0; color: var(--parchment); font-size: 15.5px; }
.callout__k {
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--bronze); display: block; margin-bottom: 9px;
}
.callout--lesson { border-left-color: var(--patina); background: var(--patina-lo); }
.callout--lesson .callout__k { color: var(--patina); }

.backlink {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--muted); text-decoration: none;
  display: inline-flex; gap: 9px; margin-bottom: 30px;
}
.backlink:hover { color: var(--bronze); }

/* ------------------------------------------------------------ footer ----- */

.foot {
  padding: clamp(64px, 10vw, 104px) 0 48px;
  background: var(--surface-03);
}
.foot h2 { font-size: clamp(28px, 4.4vw, 48px); letter-spacing: -0.035em; margin-bottom: 20px; }
.foot .lead { margin-bottom: 34px; }
.foot__links { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 56px; }
.foot__creds {
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.06em;
  color: var(--bronze); margin: 0 0 30px;
  padding-left: 14px; border-left: 2px solid var(--bronze-dim);
  line-height: 1.9;
}
.foot__base {
  border-top: 1px solid var(--rule); padding-top: 24px;
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em; color: var(--faint);
}

/* ------------------------------------------------------------ reveal ----- */

/* Content is visible by default. Only once the script has confirmed it can
   drive the animation does anything get hidden — so no-JS, an old browser, or a
   failed observer degrades to a plain visible page instead of a blank one. */
.reveal { opacity: 1; transform: none; }

.has-reveal .reveal { opacity: 0; transform: translateY(14px); }
.has-reveal .reveal.is-in {
  opacity: 1; transform: none;
  transition: opacity .6s cubic-bezier(.2,.7,.3,1), transform .6s cubic-bezier(.2,.7,.3,1);
}

/* ---------------------------------------------------------- responsive --- */

@media (max-width: 900px) {
  .hero__grid { grid-template-columns: 1fr; }
  .hero__art { order: -1; }
  .cards--2 { grid-template-columns: 1fr; }
  .stats, .meta { grid-template-columns: repeat(2, 1fr); }
  .ev { grid-template-columns: 1fr; gap: 8px; }
}

@media (max-width: 540px) {
  body { font-size: 16px; }
  .stats, .meta { grid-template-columns: 1fr; }
  .nav__inner { gap: 18px; }
  .nav__link { font-size: 11px; }
  .card, .card--feature { padding: 24px 22px; }
  .layer__net { margin-left: 0; width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    transition-duration: .001ms !important;
  }
  .has-reveal .reveal { opacity: 1; transform: none; }
}