/*
 * Stefano Carotenuto — Personal Site
 * style.css — mobile-first
 *
 * Breakpoints:
 *   base   → mobile  (< 600px)
 *   sm     → ≥ 600px
 *   md     → ≥ 768px
 *   lg     → ≥ 1024px
 */

/* ─────────────────────────────────────────
   FONTS — local @font-face (TTF)
   6 file nella cartella fonts/
───────────────────────────────────────── */

/* Cormorant Garamond */
@font-face {
  font-family: 'Cormorant Garamond';
  src: url('../fonts/CormorantGaramond-Light.ttf')   format('truetype');
  font-weight: 300; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'Cormorant Garamond';
  src: url('../fonts/CormorantGaramond-LightItalic.ttf')   format('truetype');
  font-weight: 300; font-style: italic; font-display: swap;
}
@font-face {
  font-family: 'Cormorant Garamond';
  src: url('../fonts/CormorantGaramond-Regular.ttf')   format('truetype');
  font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'Cormorant Garamond';
  src: url('../fonts/CormorantGaramond-Italic.ttf')   format('truetype');
  font-weight: 400; font-style: italic; font-display: swap;
}

/* DM Mono */
@font-face {
  font-family: 'DM Mono';
  src: url('../fonts/DMMono-Light.ttf')   format('truetype');
  font-weight: 300; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'DM Mono';
  src: url('../fonts/DMMono-Regular.ttf')   format('truetype');
  font-weight: 400; font-style: normal; font-display: swap;
}

/* ─────────────────────────────────────────
   DESIGN TOKENS
───────────────────────────────────────── */
:root {
  --paper:      #fafbfd;
  --paper-2:    #e9ebf1;
  --ink:        #1b1e28;
  --ink-2:      #383c4a;
  --muted:      #464b64;
  --rule:       #d1d4dd;
  --dark-bg:    #13151c;
  --dark-2:     #1d1f29;
  --dark-rule:  #2d303c;
  --dark-muted: #f3f3f5;
  --dark-muted2: #7b7f8e;

  --serif: 'Cormorant Garamond', Georgia, serif;
  --mono:  'DM Mono', 'Courier New', monospace;

  --s1: 4px;  --s2: 8px;  --s3: 12px;
  --s4: 16px; --s5: 24px; --s6: 32px;
  --s7: 48px; --s8: 64px; --s9: 96px;

  /* Mobile nav height — overridden at lg */
  --nav-h: 48px;
}

/* ─────────────────────────────────────────
   RESET & BASE
───────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--mono);
  font-weight: 300;
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

/* Dark-zone focus — ensure visibility on dark backgrounds (WCAG 2.4.7) */
#photography :focus-visible,
.site-footer :focus-visible,
.site-header.dark-zone :focus-visible {
  outline-color: var(--paper);
}

.skip-link {
  position: absolute;
  top: -999px; left: 0;
  background: var(--ink);
  color: var(--paper);
  padding: var(--s2) var(--s4);
  font-family: var(--mono);
  font-size: .75rem;
  letter-spacing: .08em;
  z-index: 9999;
  text-decoration: none;
}
.skip-link:focus { top: 0; }

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

/* ─────────────────────────────────────────
   HEADER / NAV
───────────────────────────────────────── */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  background: var(--paper);
  border-bottom: 1px solid var(--rule);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--s5);
  z-index: 100;
  transition: background .3s, border-color .3s
}

.site-header.dark-zone {
  background: var(--dark-bg);
  border-color: var(--dark-rule);
}

.site-logo {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 1rem;
  letter-spacing: -.01em;
  color: var(--ink);
  text-decoration: none;
  transition: color .3s;
}
.site-header.dark-zone .site-logo { color: var(--paper); }

/* Mobile: nav hidden, toggle visible */
.site-nav {
  display: none;
  list-style: none;
}

.site-nav.open {
  display: flex;
  flex-direction: column;
  position: fixed;
  top: var(--nav-h); left: 0; right: 0;
  background: var(--paper);
  border-bottom: 1px solid var(--rule);
  padding: var(--s5);
  gap: var(--s4);
  z-index: 99;
}

.site-nav a {
  font-family: var(--mono);
  font-size: .6875rem;
  font-weight: 400;
  letter-spacing: .1em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--muted);
  transition: color .2s;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
}

.site-nav a:hover,
.site-nav a[aria-current="true"] {
  color: var(--ink);
  border-bottom-color: var(--ink);
}

.site-header.dark-zone .site-nav.open {
  background: var(--dark-bg);
  border-bottom-color: var(--dark-rule);
}

.site-header.dark-zone .site-nav a            { color: var(--dark-muted); }
.site-header.dark-zone .site-nav a:hover,
.site-header.dark-zone .site-nav a[aria-current="true"] {
  color: var(--paper);
  border-bottom-color: var(--paper);
}

/* Photography link — italic serif to mark a different register */
.site-nav a.nav-aside {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  font-size: .8125rem;
  letter-spacing: .02em;
  text-transform: none;
}

.nav-toggle {
  display: flex;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--s2);
  color: var(--ink);
}
.site-header.dark-zone .nav-toggle { color: var(--paper); }

/* ─────────────────────────────────────────
   SECTION SCAFFOLD
───────────────────────────────────────── */
main { padding-top: var(--nav-h); }

section {
  padding: var(--s7) var(--s5);
  border-bottom: 1px solid var(--rule);
}

.section-label {
  display: flex;
  align-items: center;
  gap: var(--s4);
  font-size: .625rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: var(--s6);
}
#cv .section-label { color: var(--muted-2); }

.section-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--rule);
}



.inner {
  max-width: 1020px;
  margin: 0 auto;
}

/* ─────────────────────────────────────────
   01 HERO
───────────────────────────────────────── */
#hero {
  min-height: calc(100dvh - var(--nav-h));
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: var(--s7);
  padding-bottom: var(--s7);
  border-bottom: 1px solid var(--rule);
  position: relative;
  overflow: hidden;
}

#hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
  opacity: .5;
}

.hero-inner {
  max-width: 1020px;
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr;
  align-items: center;
  gap: var(--s5);
}

/* ── Hero diagram ── */
.hero-diagram-wrap {
  position: relative;
  margin: 0 auto;
  max-width: 280px;
}

.hero-diagram {
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  animation: fadeIn .4s .6s ease forwards;
}

.hero-svg {
  width: 100%;
  max-width: 420px;
  height: auto;
  overflow: visible;
}

/* Replay button */
.hero-replay {
  position: absolute;
  bottom: -8px;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: none;
  border-radius: 50%;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  opacity: 0;
  transition: color .2s, opacity .3s;
  pointer-events: none;
}
.hero-replay.visible {
  opacity: 1;
  pointer-events: auto;
}
.hero-replay:hover  { color: var(--ink); }
.hero-replay:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 2px;
}
.hero-replay svg {
  width: 14px;
  height: 14px;
}

.morph-line {
  stroke: var(--ink);
  stroke-width: 1.4;
  stroke-linecap: round;
}

/* Dashed base: Object↔Interpretant indirect relationship (Peirce) */
.morph-base {
  stroke-dasharray: 6 4;
}

.morph-dot {
  opacity: 0;
}

/* Colored vertex dots */
.dot-sign { fill: #b4564f; }
.dot-obj  { fill: #c08e3a; }
.dot-int  { fill: #4d866c; }

/* ── UI wireframe elements ── */
.ui-el {
  stroke: var(--ink);
  stroke-width: 0.9;
  stroke-linecap: round;
  fill: none;
  opacity: 0;
}

/* Window control dots — macOS-style colors */
.ui-dot-r { fill: #b4564f; stroke: none; }
.ui-dot-y { fill: #c08e3a; stroke: none; }
.ui-dot-g { fill: #4d866c; stroke: none; }

/* Sidebar nav */
.ui-sn { stroke-width: 1; stroke: var(--muted); }
.ui-active-dot { fill: var(--ink); stroke: none; }

/* Content heading */
.ui-heading { stroke-width: 1.1; }

/* Text lines */
.ui-text { stroke-width: 0.6; stroke: var(--muted); }

/* Card blocks */
.ui-card { stroke-width: 0.8; stroke: var(--rule); }

/* Buttons */
.ui-btn       { stroke: none; fill: var(--ink); }
.ui-btn-ghost { stroke: var(--ink); stroke-width: 0.8; fill: none; }

/* Success check in primary button */
.ui-check {
  fill: none;
  stroke: var(--paper);
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
  opacity: 0;
}

/* Smile arc (Phase 4) */
.ui-smile {
  fill: none;
  stroke: #4d866c;
  stroke-width: 2.5;
  stroke-linecap: round;
  opacity: 0;
}

/* Frame border */
.ui-frame {
  stroke: var(--ink);
  stroke-width: 1;
  fill: none;
  opacity: 0;
}

/* Pulse animation for the triangle before morphing */
@keyframes triPulse {
  0%, 100% { stroke-width: 1.4; }
  50%      { stroke-width: 2; }
}

@keyframes drawStroke { to { stroke-dashoffset: 0; } }
@keyframes fadeIn     { to { opacity: 1; } }

.hero-keywords {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0;
}

.hero-kw {
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(2.5rem, 11vw, 6.5rem);
  line-height: 1.0;
  letter-spacing: -.02em;
  color: var(--ink);
  width: 100%;
  opacity: 0;
  transform: translateY(24px);
  animation: fadeUp .7s ease forwards;
}

.hero-kw:nth-child(2) {
  animation: fadeUp .7s .1s ease forwards;
}
.hero-kw:nth-child(3) {
  animation: fadeUp .7s .22s ease forwards;
}
.hero-kw:nth-child(4) {
  animation: fadeUp .7s .34s ease forwards;
}

@keyframes fadeUp {
  to { opacity: 1; transform: none; }
}

.hero-scroll-hint {
  position: absolute;
  bottom: var(--s5);
  left: 0;
  right: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--s2);
  font-size: .5625rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--muted);
  opacity: 0;
  animation: fadeUp .5s .8s ease forwards;
}

.hero-scroll-hint::after {
  content: '';
  width: 1px;
  height: 28px;
  background: linear-gradient(var(--rule), transparent);
  animation: scrollLine 2.2s 1.2s ease-in-out infinite;
}

@keyframes scrollLine {
  0%, 100% { opacity: .3; transform: scaleY(1); }
  50%       { opacity: 1; transform: scaleY(.7); }
}

/* ─────────────────────────────────────────
   02 ABOUT
───────────────────────────────────────── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s7);
}

/* Portrait: stack below text on mobile */
.about-visual {
  position: relative;
  max-width: 240px;
  border: 1px solid var(--rule);
  padding: var(--s3);
  background: #fff;
}

.about-portrait {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3/4;
  object-fit: cover;
}

.portrait-credit {
  font-size: .5625rem;
  font-family: var(--mono);
  letter-spacing: .06em;
  color: var(--muted);
  margin-top: var(--s2);
  text-align: right;
  padding-right: var(--s1);
}

.about-text h2 {
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(1.5rem, 5vw, 2.5rem);
  line-height: 1.15;
  letter-spacing: -.015em;
  margin-bottom: var(--s5);
}

.about-text h2 i {
  font-style: italic;
  color: var(--muted);
}

.about-text p {
  font-size: .9rem;
  line-height: 1.75;
  color: var(--ink-2);
  margin-bottom: var(--s5);
}

.about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s2);
  margin-top: var(--s5);
}

.tag {
  font-size: .625rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--muted);
  border: 1px solid var(--rule);
  padding: var(--s1) var(--s3);
  border-radius: 1px;
}

/* ─────────────────────────────────────────
   03 WORK
───────────────────────────────────────── */
#work { background: var(--paper); }

/* Mobile: single column stack */
.work-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s5);
}

.project-card {
  border: 1px solid var(--rule);
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: var(--ink);
  transition: transform .25s ease, box-shadow .25s ease;
  position: relative;
  overflow: hidden;
  background: #f1f2f6
}

.project-card::after {
  content: '';
  position: absolute;
  inset: 0;
  border: 1px solid var(--ink);
  opacity: 0;
  transition: opacity .25s;
  pointer-events: none;
}

.project-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(27,30,40,.07);
}
.project-card:hover::after { opacity: 1; }

.card-thumb {
  aspect-ratio: 16/9;
  background: var(--paper-2);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.card-thumb-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: grayscale(100%);
  transition: filter .4s ease;
}

.project-card:hover .card-thumb-img { filter: grayscale(0%); }

.card-thumb::after {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    -45deg,
    transparent,
    transparent 4px,
    rgba(27,30,40,.04) 4px,
    rgba(27,30,40,.04) 8px
  );
  opacity: 1;
  transition: opacity .4s ease;
  pointer-events: none;
}
.project-card:hover .card-thumb::after { opacity: 0; }

.card-thumb-label {
  font-size: .6875rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--muted);
  position: relative;
  z-index: 1;
}

.card-tag {
  position: absolute;
  top: var(--s3); left: var(--s3);
  font-size: .5625rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  background: var(--ink);
  color: var(--paper);
  padding: 2px var(--s2);
}

.card-body {
  padding: var(--s4) var(--s4) var(--s5);
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--s2);
}

.card-title {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 1.125rem;
  line-height: 1.2;
}

.card-org {
  font-size: .6875rem;
  letter-spacing: .06em;
  color: var(--muted);
}

.card-desc {
  font-size: .8125rem;
  line-height: 1.65;
  color: var(--ink-2);
  flex: 1;
}

.card-arrow {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: .6875rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-top: var(--s3);
  text-decoration: none;
  transition: color .2s;
}
.card-arrow svg {
  width: 11px; height: 11px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
  transition: transform .2s;
}
.project-card:hover .card-arrow         { color: var(--ink); }
.project-card:hover .card-arrow svg     { transform: translate(2px, -2px); }

/* ─────────────────────────────────────────
   04 CV
───────────────────────────────────────── */
#cv { background: var(--paper-2); }

/* Mobile: tabs as row, content below */
.cv-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s6);
}

.cv-tabs {
  display: flex;
  flex-direction: row;
  gap: var(--s4);
  border-bottom: 1px solid var(--rule);
  padding-bottom: var(--s4);
}

.cv-tab {
  font-size: .6875rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--muted-2);
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  padding: var(--s2) 0;
  border-bottom: 1px solid transparent;
  transition: color .2s, border-color .2s;
}

.cv-tab.active,
.cv-tab:hover {
  color: var(--ink);
  border-bottom-color: var(--ink);
}

.cv-panel        { display: none; }
.cv-panel.active { display: block; }

.cv-timeline {
  border-left: 1px solid var(--rule);
  padding-left: var(--s5);
  position: relative;
}

.cv-entry {
  position: relative;
  padding-bottom: var(--s6);
}
.cv-entry:last-child { padding-bottom: 0; }

.cv-entry::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--s5) - 4px);
  top: 6px;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--rule);
  border: none;
}

.cv-year {
  font-size: .625rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--muted-2);
  margin-bottom: var(--s1);
}

.cv-role {
  font-family: var(--serif);
  font-size: 1.125rem;
  font-weight: 400;
  line-height: 1.2;
  margin-bottom: var(--s1);
}

.cv-org {
  font-size: .8125rem;
  color: var(--ink-2);
  margin-bottom: var(--s3);
}

.cv-detail {
  font-size: .8125rem;
  line-height: 1.65;
  color: var(--muted-2);
}

.cv-download {
  display: inline-flex;
  align-items: center;
  gap: var(--s3);
  margin-top: var(--s6);
  font-size: .6875rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--ink);
  border: 1px solid var(--ink);
  padding: var(--s3) var(--s5);
  transition: background .2s, color .2s;
}
.cv-download:hover {
  background: var(--ink);
  color: var(--paper);
}

/* ─────────────────────────────────────────
   05 PHOTOGRAPHY
───────────────────────────────────────── */
#photography {
  background: var(--dark-bg);
  color: var(--paper);
  border-bottom: none;
}

#photography .section-label        { color: var(--dark-muted); }
#photography .section-label::after { background: var(--dark-rule); }

/* Mobile: intro above slider */
.photo-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s6);
}

.photo-intro h2 {
  font-family: var(--serif);
  font-weight: 300;
  font-style: italic;
  font-size: clamp(1.75rem, 6vw, 2.25rem);
  line-height: 1.1;
  letter-spacing: -.01em;
  color: var(--paper);
  margin-bottom: var(--s4);
}

.photo-intro p {
  font-size: .8125rem;
  line-height: 1.75;
  color: var(--dark-muted);
  margin-bottom: var(--s4);
}

.photo-intro i,
.photo-intro cite {
  font-style: italic;
  color: var(--paper);
  opacity: .75;
}

.photo-social {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  gap: var(--s4);
}

.photo-social a {
  font-size: .6875rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--dark-muted);
  text-decoration: none;
  border-bottom: 1px solid var(--dark-rule);
  padding-bottom: 1px;
  transition: color .2s, border-color .2s;
}
.photo-social a:hover {
  color: var(--paper);
  border-color: var(--paper);
}

/* Splide overrides */
#photo-slider {
  position: relative;
  width: 100%;
}

.splide__track {
  overflow: hidden;
  width: 100%;
}

.splide__slide { width: 100%; }

.splide__slide img {
  width: 100%;
  height: auto;
  aspect-ratio: 4/3;
  object-fit: cover;
  display: block;
}

.photo-counter {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: var(--s3);
  font-size: .625rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--dark-muted);
}

.photo-nav {
  display: flex;
  align-items: center;
  gap: var(--s4);
}

.photo-nav-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;   /* slightly larger tap target on mobile */
  border-radius: 50%;
  border: 1px solid var(--dark-muted);
  background: transparent;
  color: var(--dark-muted);
  cursor: pointer;
  transition: border-color .2s, color .2s;
  flex-shrink: 0;
}
.photo-nav-btn:hover {
  border-color: var(--paper);
  color: var(--paper);
}
.photo-nav-btn:focus-visible {
  outline: 2px solid var(--paper);
  outline-offset: 3px;
}
.photo-nav-btn svg {
  width: 13px; height: 13px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ─────────────────────────────────────────
   FOOTER / CONTACT
───────────────────────────────────────── */
.site-footer {
  background: var(--dark-bg);
  border-top: 1px solid var(--dark-rule);
  padding: var(--s6) var(--s5);
  display: flex;
  flex-direction: column;
  gap: var(--s4);
}

.footer-copy {
  font-size: .75rem;
  letter-spacing: .04em;
  color: var(--paper-2);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s4);
  list-style: none;
}

.footer-links a {
  font-size: .75rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--paper-2);
  text-decoration: none;
  transition: color .2s;
}
.footer-links a:hover { text-decoration: underline }

.footer-privacy {
  font-size: .75rem;
  letter-spacing: .03em;
  line-height: 1.6;
  color: var(--paper-2);
  max-width: 480px;
}

/* ─────────────────────────────────────────
   SIDEBAR PROGRESS DOTS — hidden on mobile
───────────────────────────────────────── */
.page-progress { display: none; }

.progress-dot {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--rule);
  border: none;
  padding: 0;
  transition: background .2s, transform .2s;
}
.progress-dot.active {
  background: var(--ink);
  transform: scale(1.6);
}
.progress-dot[data-dark].active { background: var(--paper); }

/* ═════════════════════════════════════════
   SM — ≥ 600px
═════════════════════════════════════════ */
@media (min-width: 600px) {
  section { padding: var(--s8) var(--s6); }

  .site-header { padding: 0 var(--s6); }

  /* Work: 2-column grid — all 5 cards flow naturally */
  .work-grid { grid-template-columns: repeat(2, 1fr); }

  .about-visual { max-width: 240px; }

  .cv-timeline { padding-left: var(--s6); }
  .cv-entry::before { left: calc(-1 * var(--s6) - 5px); width: 9px; height: 9px; }

  .photo-social { flex-direction: column; }

  .site-footer {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    padding: var(--s7) var(--s6);
  }
  .footer-privacy { width: 100%; margin-top: var(--s2); }
}

/* ═════════════════════════════════════════
   MD — ≥ 768px
═════════════════════════════════════════ */
@media (min-width: 768px) {
  section { padding: var(--s8) var(--s7); }
  .site-header { padding: 0 var(--s7); }

  /* Hero: two-column layout for desktop */
  .hero-inner {
    grid-template-columns: 1fr 1fr;
    gap: var(--s7);
  }
  .hero-keywords {
    align-items: flex-start;
    text-align: left;
  }
  .hero-kw {
    width: auto;
  }
  .hero-kw:nth-child(3) {
    padding-left: clamp(12px, 4vw, 64px);
  }
  .hero-kw:nth-child(4) {
    padding-left: clamp(24px, 8vw, 128px);
  }
  .hero-diagram-wrap {
    margin: 0;
    max-width: none;
  }

  /* About: portrait alongside text */
  .about-grid {
    grid-template-columns: 1fr 240px;
    gap: var(--s8);
    align-items: start;
  }

  /* CV: sticky sidebar tabs */
  .cv-layout {
    grid-template-columns: 180px 1fr;
    gap: var(--s7);
    align-items: start;
  }

  .cv-tabs {
    flex-direction: column;
    gap: var(--s3);
    border-bottom: none;
    padding-bottom: 0;
    position: sticky;
    top: calc(var(--nav-h) + var(--s5));
  }

  .cv-tab {
    padding: var(--s2) 0 var(--s2) var(--s4);
    border-bottom: none;
    border-left: 1px solid var(--rule);
  }

  .cv-tab.active,
  .cv-tab:hover {
    border-bottom: none;
    border-left-color: var(--ink);
  }

  /* Photography: intro beside slider */
  .photo-layout {
    grid-template-columns: 220px 1fr;
    gap: var(--s7);
    align-items: center;
  }

  .photo-social { flex-direction: column; }

  .site-footer {
    padding: var(--s7) var(--s7);
  }
}

/* ═════════════════════════════════════════
   LG — ≥ 1024px
═════════════════════════════════════════ */
@media (min-width: 1024px) {
  :root { --nav-h: 56px; }

  section { padding: var(--s9) var(--s8); }
  .site-header { padding: 0 var(--s8); }

  /* Nav: visible inline, toggle hidden */
  .site-nav {
    display: flex;
    flex-direction: row;
    gap: var(--s7);
    position: static;
    background: none;
    border: none;
    padding: 0;
  }

  .nav-toggle { display: none; }

  /* Hero: larger diagram on desktop */
  .hero-svg { max-width: 480px; }

  /* Work: 3-column grid */
  .work-grid { grid-template-columns: repeat(3, 1fr); }

  /* About: wider portrait column */
  .about-grid {
    grid-template-columns: 1fr 260px;
    gap: var(--s9);
  }
  .about-visual { max-width: 260px; }

  /* CV */
  .cv-layout {
    grid-template-columns: 200px 1fr;
    gap: var(--s8);
  }

  /* Photography */
  .photo-layout {
    grid-template-columns: 260px 1fr;
    gap: var(--s8);
  }

  .site-footer { padding: var(--s7) var(--s8); }

  /* Sidebar dots: visible on large screens */
  .page-progress {
    display: flex;
    position: fixed;
    right: 24px;
    top: 50%;
    transform: translateY(-50%);
    flex-direction: column;
    gap: 10px;
    z-index: 90;
  }

  .section-label { margin-bottom: var(--s8); }
}

/* ─────────────────────────────────────────
   Reduced motion
───────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0s !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0s !important;
  }
  .hero-diagram { opacity: 1; }
  .morph-dot { opacity: 1; }
  .ui-el, .ui-frame { opacity: 0; }
  .ui-check { opacity: 0; }
  .ui-smile { opacity: 0; }
}