/* ==========================================================================
   MOHAMMAD HAJ NAJAFI — PORTFOLIO
   Design system v2.0 (2026)

   Architecture:
   1. Tokens          — colour, type, space, motion primitives
   2. Reset & base    — normalisation, focus, selection
   3. Layout          — container, section rhythm, grid helpers
   4. Typography      — fluid scale, prose defaults
   5. Components      — nav, hero, cards, chips, buttons, timeline, form
   6. Motion          — scroll reveal (respects prefers-reduced-motion)
   7. Responsive      — breakpoints
   8. Print           — CV-friendly output
   ========================================================================== */

/* ==========================================================================
   1. TOKENS
   ========================================================================== */

:root {
  /* --- Colour: dark theme is the default -------------------------------- */
  --bg:            #0b0c0e;
  --bg-elevated:   #131518;
  --bg-sunken:     #08090a;
  --surface:       rgba(255, 255, 255, 0.028);
  --surface-hover: rgba(255, 255, 255, 0.055);

  --text:          #eceef1;
  --text-muted:    #9aa1ab;
  --text-subtle:   #8a919b;   /* 4.9:1 on --bg — passes WCAG AA for body text */

  --border:        rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.16);

  --accent:        #7c9cff;
  --accent-hover:  #93adff;
  --accent-soft:   rgba(124, 156, 255, 0.12);
  --accent-ring:   rgba(124, 156, 255, 0.40);
  /* In dark mode the accent is light, so filled buttons need DARK label text.
     White on #7c9cff is only 2.6:1 and fails AA outright. */
  --on-accent:     #0b0c0e;

  --positive:      #4ade80;
  --warm:          #e8b84b;

  /* --- Typography ------------------------------------------------------- */
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, "SF Mono",
               Menlo, Consolas, monospace;

  /* Fluid type scale — 1.250 (major third) at desktop, tightened on mobile */
  --step--2: clamp(0.72rem, 0.70rem + 0.10vw, 0.78rem);
  --step--1: clamp(0.83rem, 0.80rem + 0.15vw, 0.92rem);
  --step-0:  clamp(0.98rem, 0.95rem + 0.16vw, 1.06rem);
  --step-1:  clamp(1.15rem, 1.08rem + 0.35vw, 1.35rem);
  --step-2:  clamp(1.38rem, 1.24rem + 0.68vw, 1.85rem);
  --step-3:  clamp(1.70rem, 1.42rem + 1.35vw, 2.60rem);
  --step-4:  clamp(2.05rem, 1.55rem + 2.45vw, 3.75rem);

  --leading-tight: 1.12;
  --leading-snug:  1.32;
  --leading-body:  1.65;

  /* --- Space (8pt base) ------------------------------------------------- */
  --sp-1: 0.25rem;  --sp-2: 0.5rem;   --sp-3: 0.75rem;  --sp-4: 1rem;
  --sp-5: 1.5rem;   --sp-6: 2rem;     --sp-7: 3rem;     --sp-8: 4rem;
  --sp-9: 6rem;     --sp-10: 8rem;

  --section-y: clamp(4rem, 9vw, 8rem);

  /* --- Form --------------------------------------------------------------*/
  --radius-sm: 6px;
  --radius:    10px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.35);
  --shadow:    0 8px 24px -8px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 24px 60px -16px rgba(0, 0, 0, 0.65);

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --dur:  340ms;

  --container: 1120px;
  --measure:   68ch;
}

/* --- Light theme -------------------------------------------------------- */
[data-theme="light"] {
  --bg:            #fbfbfc;
  --bg-elevated:   #ffffff;
  --bg-sunken:     #f2f3f5;
  --surface:       rgba(10, 12, 16, 0.022);
  --surface-hover: rgba(10, 12, 16, 0.05);

  --text:          #14161a;
  --text-muted:    #545b66;
  --text-subtle:   #6a707a;   /* 4.7:1 on --bg — passes WCAG AA */

  --border:        rgba(10, 12, 16, 0.10);
  --border-strong: rgba(10, 12, 16, 0.20);

  --accent:        #3b5bdb;
  --accent-hover:  #2f4bc4;
  --accent-soft:   rgba(59, 91, 219, 0.09);
  --accent-ring:   rgba(59, 91, 219, 0.35);
  --on-accent:     #ffffff;   /* 5.7:1 — fine in light mode */

  --positive:      #15803d;
  --warm:          #b45309;

  --shadow-sm: 0 1px 2px rgba(10, 12, 16, 0.06);
  --shadow:    0 8px 24px -10px rgba(10, 12, 16, 0.14);
  --shadow-lg: 0 24px 60px -20px rgba(10, 12, 16, 0.20);
}

/* ==========================================================================
   2. RESET & BASE
   ========================================================================== */

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

* { margin: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 6rem;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: var(--step-0);
  line-height: var(--leading-body);
  font-feature-settings: "cv02", "cv03", "cv04", "cv11", "ss01";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background-color var(--dur) var(--ease),
              color var(--dur) var(--ease);
}

img, picture, svg, video {
  display: block;
  max-width: 100%;
  height: auto;
}

input, button, textarea, select { font: inherit; color: inherit; }

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

ul, ol { list-style: none; padding: 0; }

::selection { background: var(--accent); color: var(--bg); }

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

/* Ambient background wash — replaces the old CRT scanline overlay.
   Static gradient: no repaint cost, no flicker, no seizure risk. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(760px 520px at 78% -8%, var(--accent-soft), transparent 62%),
    radial-gradient(620px 460px at 4%  12%, rgba(124, 156, 255, 0.055), transparent 60%);
}

/* Skip link — keyboard users land here first */
.skip-link {
  position: absolute;
  top: var(--sp-3);
  left: var(--sp-3);
  z-index: 200;
  padding: var(--sp-3) var(--sp-4);
  background: var(--accent);
  color: var(--on-accent);
  border-radius: var(--radius);
  font-weight: 600;
  font-size: var(--step--1);
  transform: translateY(-160%);
  transition: transform 180ms var(--ease);
}
.skip-link:focus { transform: translateY(0); }

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ==========================================================================
   3. LAYOUT
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 2.5rem);
}

.section {
  padding-block: var(--section-y);
  border-top: 1px solid var(--border);
}
.section:first-of-type { border-top: 0; }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--sp-4);
  margin-bottom: var(--sp-7);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-mono);
  font-size: var(--step--2);
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-subtle);
}
.eyebrow::before {
  content: "";
  width: 20px;
  height: 1px;
  background: var(--accent);
}

.grid { display: grid; gap: var(--sp-5); }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(270px, 1fr)); }

/* ==========================================================================
   4. TYPOGRAPHY
   ========================================================================== */

h1, h2, h3, h4 {
  font-weight: 600;
  line-height: var(--leading-tight);
  letter-spacing: -0.022em;
  text-wrap: balance;
}

h1 { font-size: var(--step-4); letter-spacing: -0.035em; }
h2 { font-size: var(--step-3); letter-spacing: -0.028em; }
h3 { font-size: var(--step-1); }
h4 { font-size: var(--step-0); }

p { text-wrap: pretty; }

.lead {
  font-size: var(--step-1);
  line-height: var(--leading-snug);
  color: var(--text-muted);
  max-width: var(--measure);
}

.prose { max-width: var(--measure); color: var(--text-muted); }
.prose p + p { margin-top: var(--sp-4); }
.prose strong { color: var(--text); font-weight: 600; }

.muted   { color: var(--text-muted); }
.subtle  { color: var(--text-subtle); }
.mono    { font-family: var(--font-mono); font-variant-ligatures: none; }

.link-underline {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  text-decoration-color: color-mix(in srgb, var(--accent) 40%, transparent);
  transition: text-decoration-color 180ms var(--ease);
}
.link-underline:hover { text-decoration-color: var(--accent); }

/* ==========================================================================
   5. COMPONENTS
   ========================================================================== */

/* --- 5.1 Navigation ----------------------------------------------------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: blur(14px) saturate(150%);
  -webkit-backdrop-filter: blur(14px) saturate(150%);
  border-bottom: 1px solid transparent;
  transition: border-color 220ms var(--ease),
              background-color 220ms var(--ease);
}
.nav.is-stuck { border-bottom-color: var(--border); }

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-5);
  height: 64px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
  font-weight: 650;
  font-size: var(--step--1);
  letter-spacing: -0.01em;
  white-space: nowrap;
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 30px; height: 30px;
  border-radius: 9px;
  background: var(--accent);
  color: var(--on-accent);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--sp-1);
}
.nav-links a {
  padding: 0.4rem 0.7rem;
  border-radius: var(--radius-sm);
  font-size: var(--step--1);
  color: var(--text-muted);
  transition: color 180ms var(--ease), background-color 180ms var(--ease);
}
.nav-links a:hover { color: var(--text); background: var(--surface-hover); }
.nav-links a.is-active { color: var(--text); font-weight: 550; }

.nav-actions { display: flex; align-items: center; gap: var(--sp-2); }

.icon-btn {
  display: grid;
  place-items: center;
  width: 36px; height: 36px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 180ms var(--ease);
}
.icon-btn:hover {
  color: var(--text);
  border-color: var(--border-strong);
  background: var(--surface-hover);
}
.icon-btn svg { width: 17px; height: 17px; }

.nav-toggle { display: none; }

/* --- 5.2 Buttons -------------------------------------------------------- */

.btn {
  --btn-bg: var(--accent);
  --btn-fg: var(--on-accent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  padding: 0.72rem 1.3rem;
  border: 1px solid transparent;
  border-radius: var(--radius);
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: -0.005em;
  cursor: pointer;
  white-space: nowrap;
  transition: transform 160ms var(--ease), background-color 180ms var(--ease),
              border-color 180ms var(--ease), box-shadow 180ms var(--ease);
}
.btn:hover { background: var(--accent-hover); transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn svg { width: 16px; height: 16px; flex-shrink: 0; }

.btn-secondary {
  --btn-bg: transparent;
  --btn-fg: var(--text);
  border-color: var(--border-strong);
}
.btn-secondary:hover {
  background: var(--surface-hover);
  border-color: var(--text-subtle);
}

.btn-ghost {
  --btn-bg: transparent;
  --btn-fg: var(--text-muted);
  padding-inline: 0.6rem;
}
.btn-ghost:hover { background: var(--surface-hover); color: var(--text); }

/* --- 5.3 Hero ----------------------------------------------------------- */

.hero {
  padding-block: clamp(3.5rem, 9vw, 7rem) var(--section-y);
  border-top: 0;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: center;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 0.34rem 0.8rem 0.34rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  font-family: var(--font-mono);
  font-size: var(--step--2);
  letter-spacing: 0.04em;
  color: var(--text-muted);
  margin-bottom: var(--sp-5);
}
.status-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--positive);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--positive) 22%, transparent);
  flex-shrink: 0;
}

.hero h1 { margin-bottom: var(--sp-4); }
.hero h1 .accent { color: var(--accent); }

.hero-sub {
  font-size: var(--step-1);
  line-height: 1.5;
  color: var(--text-muted);
  max-width: 54ch;
  margin-bottom: var(--sp-6);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
  margin-bottom: var(--sp-6);
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2) var(--sp-5);
  font-family: var(--font-mono);
  font-size: var(--step--2);
  color: var(--text-subtle);
  letter-spacing: 0.02em;
}
.hero-meta span { display: inline-flex; align-items: center; gap: 0.4rem; }

/* Portrait */
.hero-portrait { position: relative; justify-self: center; width: 100%; max-width: 320px; }
.hero-portrait img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: var(--radius-xl);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
}
.hero-portrait::after {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: var(--radius-xl);
  background: linear-gradient(160deg, var(--accent-soft), transparent 55%);
  pointer-events: none;
}

/* --- 5.4 Proof bar (the 30-second scan) --------------------------------- */

.proof-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1px;
  margin-top: var(--sp-8);
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.proof-item {
  padding: var(--sp-5) var(--sp-4);
  background: var(--bg);
  transition: background-color 200ms var(--ease);
}
.proof-item:hover { background: var(--bg-elevated); }
.proof-value {
  display: block;
  font-size: var(--step-2);
  font-weight: 650;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 0.35rem;
}
.proof-label {
  font-family: var(--font-mono);
  font-size: var(--step--2);
  color: var(--text-subtle);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* --- 5.5 Cards ---------------------------------------------------------- */

.card {
  position: relative;
  padding: var(--sp-5);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  transition: border-color 240ms var(--ease), transform 240ms var(--ease),
              background-color 240ms var(--ease);
}
.card:hover {
  border-color: var(--border-strong);
  background: var(--surface-hover);
  transform: translateY(-2px);
}

.card-title {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  margin-bottom: var(--sp-4);
  font-size: var(--step-0);
  font-weight: 600;
}
.card-icon {
  display: grid;
  place-items: center;
  width: 32px; height: 32px;
  border-radius: 9px;
  background: var(--accent-soft);
  color: var(--accent);
  flex-shrink: 0;
}
.card-icon svg { width: 16px; height: 16px; }

/* Skill rows */
.skill-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--sp-4);
  padding-block: 0.55rem;
  border-bottom: 1px solid var(--border);
  font-size: var(--step--1);
}
.skill-row:last-child { border-bottom: 0; padding-bottom: 0; }
.skill-row .skill-name { color: var(--text); font-weight: 500; }
.skill-row .skill-note {
  font-family: var(--font-mono);
  font-size: var(--step--2);
  color: var(--text-subtle);
  text-align: right;
}

/* --- 5.6 Chips ---------------------------------------------------------- */

.chip-row { display: flex; flex-wrap: wrap; gap: var(--sp-2); }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.28rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  font-family: var(--font-mono);
  font-size: var(--step--2);
  letter-spacing: 0.02em;
  color: var(--text-muted);
  white-space: nowrap;
}
.chip-accent {
  border-color: color-mix(in srgb, var(--accent) 35%, transparent);
  background: var(--accent-soft);
  color: var(--accent);
}
.chip-warm {
  border-color: color-mix(in srgb, var(--warm) 35%, transparent);
  background: color-mix(in srgb, var(--warm) 10%, transparent);
  color: var(--warm);
}

/* --- 5.7 Projects ------------------------------------------------------- */

.project-list { display: grid; gap: var(--sp-5); }

.project {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--surface);
  transition: border-color 260ms var(--ease), background-color 260ms var(--ease);
}
.project:hover { border-color: var(--border-strong); background: var(--surface-hover); }

.project-media {
  position: relative;
  background: var(--bg-sunken);
  min-height: 220px;
  overflow: hidden;
}
.project-media img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 700ms var(--ease);
}
.project:hover .project-media img { transform: scale(1.03); }

.project-body {
  padding: clamp(1.25rem, 3vw, 2rem);
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
}

.project-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--sp-4);
}
.project-header h3 { margin-bottom: 0.3rem; }
.project-kicker {
  font-family: var(--font-mono);
  font-size: var(--step--2);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-subtle);
}

/* Problem → Approach → Result */
.psr { display: grid; gap: var(--sp-3); }
.psr-item {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: var(--sp-4);
  align-items: start;
  font-size: var(--step--1);
}
.psr-key {
  font-family: var(--font-mono);
  font-size: var(--step--2);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-subtle);
  padding-top: 0.15rem;
}
.psr-val { color: var(--text-muted); }
.psr-val strong { color: var(--text); font-weight: 600; }

.project-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-3);
  margin-top: auto;
  padding-top: var(--sp-3);
  border-top: 1px solid var(--border);
}

/* --- 5.8 Timeline (education / certifications) -------------------------- */

.timeline { position: relative; display: grid; }

.tl-item {
  position: relative;
  display: grid;
  grid-template-columns: 130px minmax(0, 1fr);
  gap: var(--sp-5);
  padding-block: var(--sp-5);
  border-bottom: 1px solid var(--border);
}
.tl-item:last-child { border-bottom: 0; }

.tl-date {
  font-family: var(--font-mono);
  font-size: var(--step--2);
  letter-spacing: 0.04em;
  color: var(--text-subtle);
  padding-top: 0.2rem;
}
.tl-title {
  font-size: var(--step-0);
  font-weight: 600;
  margin-bottom: 0.3rem;
}
.tl-org {
  font-size: var(--step--1);
  color: var(--accent);
  margin-bottom: var(--sp-3);
}
.tl-body { font-size: var(--step--1); color: var(--text-muted); }

/* Certification grid */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--sp-3);
}
.cert {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-3);
  padding: var(--sp-4);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  font-size: var(--step--1);
  transition: border-color 200ms var(--ease);
}
.cert:hover { border-color: var(--border-strong); }
.cert-check { color: var(--positive); flex-shrink: 0; margin-top: 2px; }
.cert-check svg { width: 15px; height: 15px; }
.cert-name { font-weight: 550; display: block; margin-bottom: 0.15rem; }
.cert-meta {
  font-family: var(--font-mono);
  font-size: var(--step--2);
  color: var(--text-subtle);
}

/* --- 5.9 Contact -------------------------------------------------------- */

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}

.field { display: grid; gap: 0.4rem; margin-bottom: var(--sp-4); }
.field label {
  font-family: var(--font-mono);
  font-size: var(--step--2);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-subtle);
}
.field input,
.field textarea {
  width: 100%;
  padding: 0.72rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elevated);
  color: var(--text);
  font-size: var(--step--1);
  transition: border-color 180ms var(--ease), box-shadow 180ms var(--ease);
}
.field input::placeholder,
.field textarea::placeholder { color: var(--text-subtle); }
.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-ring);
}
.field textarea { resize: vertical; min-height: 120px; line-height: 1.6; }

.contact-direct { display: grid; gap: var(--sp-2); margin-top: var(--sp-5); }
.contact-link {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-3) var(--sp-4);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: var(--step--1);
  color: var(--text-muted);
  transition: all 180ms var(--ease);
}
.contact-link:hover {
  border-color: var(--border-strong);
  background: var(--surface-hover);
  color: var(--text);
}
.contact-link svg { width: 16px; height: 16px; color: var(--text-subtle); flex-shrink: 0; }
.contact-link .cl-handle {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: var(--step--2);
  color: var(--text-subtle);
}

/* --- 5.10 Footer -------------------------------------------------------- */

.footer {
  padding-block: var(--sp-6);
  border-top: 1px solid var(--border);
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  font-size: var(--step--2);
  color: var(--text-subtle);
  font-family: var(--font-mono);
}
.footer-links { display: flex; gap: var(--sp-4); }
.footer-links a:hover { color: var(--text); }

/* ==========================================================================
   6. MOTION
   ========================================================================== */

[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 620ms var(--ease), transform 620ms var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
}
[data-reveal].is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
}

/* ==========================================================================
   7. RESPONSIVE
   ========================================================================== */

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: var(--sp-6); }
  .hero-portrait { max-width: 200px; justify-self: start; order: -1; }
  .project { grid-template-columns: 1fr; }
  .project-media { min-height: 200px; max-height: 260px; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .nav-links {
    position: fixed;
    inset: 64px 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--sp-3);
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    transform: translateY(-125%);
    transition: transform 300ms var(--ease);
  }
  .nav-links.is-open { transform: translateY(0); }
  .nav-links a { padding: 0.75rem 0.9rem; font-size: var(--step-0); }
  .nav-toggle { display: grid; }

  .tl-item { grid-template-columns: 1fr; gap: var(--sp-2); }
  .psr-item { grid-template-columns: 1fr; gap: 0.2rem; }
  .section-head { margin-bottom: var(--sp-6); }
}

@media (max-width: 480px) {
  .proof-bar { grid-template-columns: repeat(2, 1fr); }
  .hero-actions .btn { flex: 1 1 100%; }
}

/* ==========================================================================
   8. PRINT
   ========================================================================== */

@media print {
  .nav, .footer, .skip-link, #contact, .hero-actions, body::before { display: none !important; }
  body { background: #fff; color: #000; font-size: 10.5pt; }
  .section { padding-block: 0.75rem; border-top: 1px solid #ccc; break-inside: avoid; }
  .card, .project, .cert { border-color: #ccc; background: none; break-inside: avoid; }
  a { color: #000; text-decoration: underline; }
}