/* ================================================================
   firasridene.tech · design tokens
   Whitewash & Sidi Bou Said blue; agent graphs drawn like door studs.
   ================================================================ */

@font-face {
  font-family: "Bricolage Grotesque";
  src: url("../assets/fonts/bricolage-vf.woff2") format("woff2-variations");
  font-weight: 200 800;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Sans";
  src: url("../assets/fonts/plex-sans-400.woff2") format("woff2");
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Sans";
  src: url("../assets/fonts/plex-sans-500.woff2") format("woff2");
  font-weight: 500;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Sans";
  src: url("../assets/fonts/plex-sans-600.woff2") format("woff2");
  font-weight: 600;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("../assets/fonts/plex-mono-400.woff2") format("woff2");
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("../assets/fonts/plex-mono-500.woff2") format("woff2");
  font-weight: 500;
  font-display: swap;
}

:root {
  --whitewash: #f5f4ef;
  --paper: #fdfcf9;
  --ink: #111b2b;
  --ink-soft: #46536a;
  --blue: #2553c4;
  --blue-deep: #1c3e95;
  --haze: #e7ebf4;
  --line: rgba(17, 27, 43, 0.14);
  --brass: #b7802f;

  --display: "Bricolage Grotesque", "Arial Black", sans-serif;
  --body: "IBM Plex Sans", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;

  --rail-w: 264px;
  --measure: 68ch;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  font-family: var(--body);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--ink);
  background: var(--whitewash);
  -webkit-font-smoothing: antialiased;
}

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

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

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

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: var(--paper);
  padding: 0.6rem 1rem;
  z-index: 99;
}
.skip:focus { left: 0; }

/* ---- mono labels ---- */
.eyebrow,
.sec-label {
  font-family: var(--mono);
  font-size: 0.76rem;
  font-weight: 500;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--blue);
}

/* ================================================================
   Left rail · nod to the resume dashboard
   ================================================================ */
.rail {
  position: fixed;
  inset: 0 auto 0 0;
  width: var(--rail-w);
  display: flex;
  flex-direction: column;
  gap: 2rem;
  padding: 2.2rem 1.6rem;
  border-right: 1px solid var(--line);
  background: var(--whitewash);
  z-index: 10;
}

.brand {
  font-family: var(--display);
  font-weight: 640;
  font-size: 1.22rem;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.01em;
}
.brand-sub {
  display: block;
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--ink-soft);
  margin-top: 0.25rem;
}

.rail-nav { display: flex; flex-direction: column; gap: 0.15rem; }
.rail-nav a {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--ink-soft);
  text-decoration: none;
  padding: 0.42rem 0.6rem;
  border-radius: 6px;
  border-left: 2px solid transparent;
}
.rail-nav a:hover { color: var(--ink); background: var(--haze); }
.rail-nav a[aria-current="true"] {
  color: var(--blue-deep);
  border-left-color: var(--blue);
  background: var(--haze);
}

.rail-status {
  margin-top: auto;
  font-family: var(--mono);
  font-size: 0.74rem;
  line-height: 1.9;
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
  padding-top: 1.2rem;
}
.rail-status .live {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--brass);
  margin-right: 0.45rem;
  vertical-align: 1px;
}
@media (prefers-reduced-motion: no-preference) {
  .rail-status .live { animation: pulse 2.4s ease-in-out infinite; }
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(183, 128, 47, 0.45); }
  50% { box-shadow: 0 0 0 5px rgba(183, 128, 47, 0); }
}

.rail-links { display: flex; flex-wrap: wrap; gap: 0.5rem 0.9rem; }
.rail-links a {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--ink-soft);
  text-decoration: none;
}
.rail-links a:hover { color: var(--blue); }

/* mobile top bar */
.mob-bar {
  display: none;
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--whitewash) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
  padding: 0.75rem 1.2rem;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
}
.mob-bar .brand { font-size: 1rem; white-space: nowrap; }
.mob-bar nav { display: flex; gap: 0.65rem; }
.mob-bar nav a {
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--ink-soft);
  text-decoration: none;
}

/* ================================================================
   Main column
   ================================================================ */
main {
  margin-left: var(--rail-w);
  padding: 0 clamp(1.2rem, 4vw, 4rem);
  max-width: 1080px;
}

section { padding: clamp(3.4rem, 7vw, 5.5rem) 0; border-top: 1px solid var(--line); }
section:first-of-type { border-top: none; }

h2 {
  font-family: var(--display);
  font-size: clamp(1.7rem, 3vw, 2.2rem);
  font-weight: 620;
  letter-spacing: -0.015em;
  line-height: 1.15;
  margin: 0.4rem 0 2.2rem;
}
h2 .sec-label { display: block; margin-bottom: 0.55rem; }

/* ---- hero ---- */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: center;
  min-height: min(88vh, 780px);
}

.hero h1 {
  font-family: var(--display);
  font-size: clamp(2.5rem, 5.2vw, 4.1rem);
  font-weight: 660;
  line-height: 1.04;
  letter-spacing: -0.022em;
  text-wrap: balance;
  margin: 1rem 0 1.3rem;
}
.hero h1 em {
  font-style: normal;
  color: var(--blue);
}

.hero-sub {
  color: var(--ink-soft);
  max-width: 46ch;
  text-wrap: pretty;
}

.hero-cta { display: flex; gap: 0.8rem; margin-top: 2rem; flex-wrap: wrap; }

.btn {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.85rem;
  font-weight: 500;
  text-decoration: none;
  padding: 0.7rem 1.3rem;
  border-radius: 8px;
  background: var(--blue);
  color: var(--paper);
  border: 1px solid var(--blue);
  transition: background 0.15s ease, color 0.15s ease;
}
.btn:hover { background: var(--blue-deep); border-color: var(--blue-deep); color: var(--paper); }
.btn.ghost { background: transparent; color: var(--blue); }
.btn.ghost:hover { background: var(--haze); color: var(--blue-deep); }

.hero-graph { text-align: center; }
.hero-graph svg { width: 100%; max-width: 470px; height: auto; }
.hero-graph figcaption {
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--ink-soft);
  margin-top: 0.4rem;
}

/* graph internals */
.g-stud { fill: var(--ink); opacity: 0.22; }
.g-edge {
  stroke: var(--blue);
  stroke-width: 1.6;
  fill: none;
  opacity: 0.55;
}
.g-node circle {
  fill: var(--paper);
  stroke: var(--blue);
  stroke-width: 1.5;
  transition: stroke-width 0.15s ease;
}
.g-node:hover circle { stroke-width: 3; }
.g-node text {
  font-family: var(--mono);
  font-size: 12.5px;
  fill: var(--ink-soft);
  text-anchor: middle;
}
.g-node.hub circle { fill: var(--blue); stroke: var(--blue-deep); }
.g-node.hub .stud { fill: var(--paper); stroke: none; }
.g-pulse { fill: var(--brass); }

@media (prefers-reduced-motion: no-preference) {
  .g-node { animation: nodeIn 0.55s cubic-bezier(0.2, 0.7, 0.3, 1.1) both; }
  .g-edge { stroke-dasharray: 400; stroke-dashoffset: 400; animation: edgeDraw 0.9s ease-out both; }
  @keyframes nodeIn { from { opacity: 0; transform: scale(0.6); } to { opacity: 1; transform: scale(1); } }
  @keyframes edgeDraw { to { stroke-dashoffset: 0; } }
}

/* ---- filters ---- */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.6rem;
}
.fchip {
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--ink-soft);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.34rem 0.95rem;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.fchip:hover { border-color: var(--blue); color: var(--blue); }
.fchip.on {
  background: var(--blue);
  border-color: var(--blue);
  color: var(--paper);
}

/* ---- project cards ---- */
.work-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(360px, 100%), 1fr));
  gap: 1.2rem;
  align-items: start;
}
.case {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: clamp(1.3rem, 2.4vw, 1.8rem);
}
.case.hide { display: none; }
.case h3 {
  font-family: var(--display);
  font-size: 1.35rem;
  font-weight: 620;
  letter-spacing: -0.015em;
  margin: 0.45rem 0 0.35rem;
}
.case p.desc { color: var(--ink-soft); font-size: 0.94rem; text-wrap: pretty; }
.case .points {
  margin: 0.7rem 0 0.4rem 1.05rem;
  font-size: 0.9rem;
}
.case .points li { margin-bottom: 0.3rem; text-wrap: pretty; }

.case .links { margin-top: 0.9rem; display: flex; gap: 1.2rem; }
.case .links a { font-family: var(--mono); font-size: 0.8rem; }

/* ---- tech chips with icons ---- */
.stack-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.9rem;
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.38rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--ink-soft);
  background: var(--haze);
  border-radius: 6px;
  padding: 0.26rem 0.6rem;
  white-space: nowrap;
}
.tico {
  width: 13px;
  height: 13px;
  flex: none;
  background: var(--ink-soft);
  -webkit-mask: var(--i) no-repeat center / contain;
  mask: var(--i) no-repeat center / contain;
}

/* ---- experience ---- */
.xp {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 1.6rem;
  padding: 1.6rem 0;
  border-top: 1px solid var(--line);
}
.xp:first-of-type { border-top: none; padding-top: 0; }
.xp .when {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--ink-soft);
  padding-top: 0.25rem;
}
.xp h3 { font-size: 1.08rem; font-weight: 600; }
.xp .org { color: var(--ink-soft); font-size: 0.92rem; margin-bottom: 0.6rem; }
.xp ul { margin: 0.4rem 0 0.7rem 1.1rem; max-width: var(--measure); }
.xp li { margin-bottom: 0.3rem; text-wrap: pretty; }
.xp .stack-chips { margin-top: 0.7rem; }

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  margin-top: 2.4rem;
}
.skill-cell {
  background: var(--haze);
  border-radius: 10px;
  padding: 1rem 1.2rem;
}
.skill-cell b {
  display: block;
  font-family: var(--mono);
  font-size: 0.74rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--blue-deep);
  margin-bottom: 0.4rem;
}
.skill-cell span { font-size: 0.9rem; color: var(--ink-soft); }

/* ---- about ---- */
.about-grid {
  display: grid;
  grid-template-columns: 168px 1fr;
  gap: 2.4rem;
  align-items: start;
}
.about-photo {
  width: 168px;
  border-radius: 12px;
  border: 1px solid var(--line);
  display: block;
}
.about-text p { max-width: var(--measure); margin-bottom: 1rem; text-wrap: pretty; }
.about-facts {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--ink-soft);
  line-height: 2;
  margin-top: 1.2rem;
}
.about-facts .k { color: var(--blue); }

.certs { margin-top: 2.6rem; max-width: var(--measure); }
.certs summary {
  cursor: pointer;
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--blue);
}
.certs ul { margin: 0.9rem 0 0 1.1rem; columns: 2; column-gap: 2.4rem; }
.certs li { font-size: 0.88rem; color: var(--ink-soft); margin-bottom: 0.35rem; break-inside: avoid; }
.certs li b { color: var(--ink); font-weight: 500; }

/* ---- contact ---- */
.contact h2 { margin-bottom: 1rem; }
.contact .big {
  font-family: var(--display);
  font-size: clamp(1.9rem, 4vw, 3rem);
  font-weight: 640;
  letter-spacing: -0.02em;
  line-height: 1.1;
  max-width: 22ch;
  text-wrap: balance;
  margin-bottom: 1.6rem;
}
.contact .big a { color: var(--blue); text-decoration-thickness: 2px; }

footer {
  margin-left: var(--rail-w);
  padding: 1.6rem clamp(1.2rem, 4vw, 4rem);
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--ink-soft);
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 2rem;
}

/* ================================================================
   Responsive
   ================================================================ */
@media (max-width: 960px) {
  .rail { display: none; }
  .mob-bar { display: flex; }
  main, footer { margin-left: 0; }

  .hero { grid-template-columns: 1fr; min-height: 0; padding-top: 3rem; }
  .hero-graph { order: 2; }
  .hero-graph svg { max-width: 400px; }

  .xp { grid-template-columns: 1fr; gap: 0.3rem; }

  .about-grid { grid-template-columns: 1fr; }
  .certs ul { columns: 1; }
}