/* =================================================================
   M. Alonso — Product Design Portfolio
   Minimal, AI-native design system
   ================================================================= */

:root{
  --bg: #0b0b0d;
  --bg-elevated: #121214;
  --ink: #eef0f2;
  --ink-dim: #9a9ea6;
  --ink-faint: #5c6068;
  --line: rgba(255,255,255,0.09);
  --line-strong: rgba(255,255,255,0.16);
  --accent: #a7ffb0;
  --accent-2: #7ea8ff;
  --accent-3: #c98bff;
  --radius: 14px;
  --mono: "IBM Plex Mono", "SF Mono", ui-monospace, monospace;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --serif: "Fraunces", Georgia, serif;
  --maxw: 1120px;
  --ease: cubic-bezier(.16,.8,.24,1);
}

[data-theme="light"]{
  --bg: #f7f6f3;
  --bg-elevated: #ffffff;
  --ink: #14161a;
  --ink-dim: #5a5f68;
  --ink-faint: #9498a0;
  --line: rgba(20,22,26,0.10);
  --line-strong: rgba(20,22,26,0.18);
  --accent: #1f8a3a;
  --accent-2: #2b5fd9;
  --accent-3: #8a34c9;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background .4s var(--ease), color .4s var(--ease);
}

a{ color: inherit; text-decoration: none; }
img{ max-width: 100%; display:block; }
ul{ margin:0; padding:0; }

.wrap{
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 32px;
}

/* ---------- cursor glow (subtle AI-flair) ---------- */
#glow{
  position: fixed;
  top:0; left:0;
  width: 480px; height: 480px;
  border-radius: 50%;
  pointer-events: none;
  background: radial-gradient(circle, rgba(167,255,176,0.10), rgba(126,168,255,0.06) 40%, transparent 70%);
  transform: translate(-50%,-50%);
  z-index: 0;
  transition: opacity .3s ease;
  will-change: transform;
}
[data-theme="light"] #glow{
  background: radial-gradient(circle, rgba(31,138,58,0.07), rgba(43,95,217,0.05) 40%, transparent 70%);
}

/* ---------- top nav ---------- */
.nav{
  position: sticky;
  top:0;
  z-index: 50;
  display:flex;
  align-items:center;
  justify-content: space-between;
  padding: 22px 32px;
  backdrop-filter: blur(10px);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border-bottom: 1px solid transparent;
}
.nav.scrolled{ border-bottom-color: var(--line); }
.nav .brand{
  font-family: var(--mono);
  font-size: 14px;
  letter-spacing: .02em;
  display:flex;
  align-items:center;
  gap:9px;
}
.nav .brand .dot{
  width:7px;height:7px;border-radius:50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse{ 0%,100%{ opacity:1 } 50%{ opacity:.35 } }

.nav .links{ display:flex; align-items:center; gap: 28px; font-size: 14px; }
.nav .links a{ color: var(--ink-dim); position:relative; padding: 4px 0; }
.nav .links a:hover, .nav .links a.active{ color: var(--ink); }
.nav .links a.active::after{
  content:"";
  position:absolute; left:0; right:0; bottom:-2px;
  height:1px; background: var(--accent);
}
.theme-toggle{
  border:1px solid var(--line);
  background: transparent;
  color: var(--ink-dim);
  border-radius: 999px;
  width: 34px; height: 34px;
  display:flex; align-items:center; justify-content:center;
  cursor:pointer;
  font-size: 13px;
  transition: border-color .2s, color .2s;
}
.theme-toggle:hover{ border-color: var(--line-strong); color: var(--ink); }

.menu-toggle{
  display:none;
  width: 40px; height: 40px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: transparent;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}
.menu-toggle span{
  display:block;
  width: 16px; height: 1.5px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform .25s var(--ease), opacity .2s;
}
.nav.open .menu-toggle span:nth-child(1){ transform: translateY(6.5px) rotate(45deg); }
.nav.open .menu-toggle span:nth-child(2){ opacity:0; }
.nav.open .menu-toggle span:nth-child(3){ transform: translateY(-6.5px) rotate(-45deg); }

@media (max-width: 720px){
  .nav{ padding: 16px 20px; }
  .nav .brand #local-time{ display:none; }
  .menu-toggle{ display:flex; }
  .nav .links{
    display:none;
    position:absolute;
    top:100%; left:0; right:0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 20px 20px;
    background: color-mix(in srgb, var(--bg) 94%, transparent);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--line);
  }
  .nav.open .links{ display:flex; }
  .nav .links a{
    padding: 14px 0;
    font-size: 16px;
    border-bottom: 1px solid var(--line);
  }
  .nav .links a.active::after{ display:none; }
  .nav .links .theme-toggle{ margin-top: 14px; }
}

/* ---------- hero ---------- */
.hero{
  position: relative;
  padding: 120px 0 96px;
  overflow: hidden;
}
.hero::before{
  content:"";
  position:absolute;
  inset: -20% -10% auto -10%;
  height: 640px;
  background:
    radial-gradient(circle at 18% 25%, rgba(126,168,255,.18), transparent 55%),
    radial-gradient(circle at 78% 15%, rgba(201,139,255,.14), transparent 50%),
    radial-gradient(circle at 50% 60%, rgba(167,255,176,.10), transparent 55%);
  filter: blur(40px);
  z-index:-1;
  animation: drift 18s ease-in-out infinite alternate;
}
@keyframes drift{
  0%{ transform: translate3d(0,0,0) scale(1); }
  100%{ transform: translate3d(10px,20px,0) scale(1.05); }
}
.eyebrow{
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink-dim);
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom: 26px;
}
.eyebrow .bar{ width: 28px; height:1px; background: var(--line-strong); }

.hero h1{
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(40px, 6vw, 74px);
  line-height: 1.05;
  letter-spacing: -0.01em;
  margin: 0 0 24px;
  max-width: 820px;
}
.hero h1 em{
  font-style: normal;
  background: linear-gradient(90deg, var(--accent-2), var(--accent-3));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero p.lede{
  font-size: 19px;
  color: var(--ink-dim);
  max-width: 560px;
  margin: 0 0 40px;
}
.hero-actions{ display:flex; gap:16px; flex-wrap: wrap; align-items:center; }

.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding: 13px 22px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  border:1px solid var(--line-strong);
  transition: all .25s var(--ease);
}
.btn.primary{
  background: var(--ink);
  color: var(--bg);
  border-color: var(--ink);
}
.btn.primary:hover{ transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,.25); }
.btn.ghost:hover{ border-color: var(--line-strong); background: var(--bg-elevated); }

/* ---------- section labels ---------- */
.section{ padding: 88px 0; border-top: 1px solid var(--line); }
.section-head{
  display:flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 24px;
  margin-bottom: 48px;
}
.section-head h2{
  font-family: var(--serif);
  font-size: clamp(26px, 3vw, 34px);
  font-weight: 500;
  margin:0;
}
.section-num{
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink-faint);
}

/* ---------- work list ---------- */
.work-list{ display:flex; flex-direction: column; }
.work-row{
  display:grid;
  grid-template-columns: 64px 1.4fr 1fr auto;
  gap: 28px;
  align-items: center;
  padding: 30px 0;
  border-bottom: 1px solid var(--line);
  transition: padding-left .3s var(--ease);
  position: relative;
}
.work-row:hover{ padding-left: 10px; }
.work-row .idx{ font-family: var(--mono); color: var(--ink-faint); font-size: 13px; }
.work-row .title{ font-size: 21px; font-weight: 500; }
.work-row .title .co{ color: var(--ink-dim); font-weight: 400; }
.work-row .meta{ display:flex; gap:10px; flex-wrap: wrap; }
.tag{
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .02em;
  color: var(--ink-dim);
  border: 1px solid var(--line);
  padding: 5px 10px;
  border-radius: 999px;
  white-space: nowrap;
}
.work-row .year{ font-family: var(--mono); color: var(--ink-faint); font-size: 13px; text-align:right; }
.work-row .arrow{
  position:absolute;
  right: -8px;
  opacity:0;
  transform: translateX(-6px);
  transition: all .3s var(--ease);
  color: var(--accent);
}
.work-row:hover .arrow{ opacity:1; transform: translateX(0); }

.work-thumb{
  position: fixed;
  left: 0; top: 0;
  width: 220px;
  height: 132px;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 28px 32px;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid rgba(20,22,26,0.08);
  background: #fff;
  pointer-events: none;
  z-index: 40;
  opacity: 0;
  box-shadow: 0 20px 48px rgba(0,0,0,.28);
  transition: opacity .45s ease;
}
.work-thumb img{
  width: 100%;
  height: 100%;
  object-fit: contain;
}
@media (hover: hover) and (pointer: fine){
  .work-thumb{ display: flex; }
  .work-thumb.is-visible{ opacity: 1; }
}

@media (max-width: 720px){
  .work-row{ grid-template-columns: 1fr; gap: 10px; }
  .work-row .year{ text-align:left; }
}

/* ---------- about teaser / blocks ---------- */
.split{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
}
@media (max-width: 800px){ .split{ grid-template-columns: 1fr; } }

.about-intro{
  display:grid;
  grid-template-columns: minmax(220px, 320px) 1fr;
  gap: 56px;
  align-items: start;
}
.about-photo{
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--bg-elevated);
}
.about-photo img{
  width: 100%;
  height: auto;
  display: block;
  filter: grayscale(1);
}
.about-bio{
  border-left: 1px solid var(--line);
  padding-left: 56px;
}
.skill-list{ max-width: 720px; }
@media (max-width: 800px){
  .about-intro{ grid-template-columns: 1fr; gap: 32px; }
  .about-photo{ max-width: 360px; }
  .about-bio{ border-left: none; padding-left: 0; }
}

.lead-text{ font-size: 18px; color: var(--ink-dim); }
.lead-text p{ margin: 0 0 20px; }
.lead-text strong{ color: var(--ink); font-weight: 600; }

.pillar{
  border-top: 1px solid var(--line);
  padding: 20px 0;
  display:flex;
  justify-content: space-between;
  gap: 16px;
}
.pillar .label{ font-family: var(--mono); font-size: 13px; color: var(--ink-faint); }
.pillar .val{ font-size: 15px; color: var(--ink-dim); text-align: right; max-width: 60%; }

/* ---------- skills bars ---------- */
.skill{ margin-bottom: 18px; }
.skill .row{ display:flex; justify-content: space-between; font-size: 13.5px; margin-bottom: 8px; }
.skill .row span:first-child{ color: var(--ink); }
.skill .row span:last-child{ font-family: var(--mono); color: var(--ink-faint); }
.skill .track{ height: 3px; background: var(--line); border-radius: 3px; overflow:hidden; }
.skill .fill{ height:100%; background: linear-gradient(90deg, var(--accent-2), var(--accent)); border-radius: 3px; width:0; transition: width 1.1s var(--ease); }

/* ---------- companies strip ---------- */
.companies{
  display:flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}
.companies span{
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--ink-dim);
  border: 1px solid var(--line);
  padding: 7px 12px;
  border-radius: 999px;
}

/* ---------- footer / CTA ---------- */
.cta{
  text-align:center;
  padding: 100px 0;
}
.cta h2{
  font-family: var(--serif);
  font-size: clamp(30px, 5vw, 52px);
  font-weight: 500;
  margin: 0 0 28px;
}
footer{
  border-top: 1px solid var(--line);
  padding: 36px 0 48px;
  display:flex;
  justify-content: space-between;
  align-items:center;
  font-size: 13px;
  color: var(--ink-faint);
  flex-wrap: wrap;
  gap: 12px;
}
footer .social{ display:flex; gap:18px; }
footer a:hover{ color: var(--ink); }

/* ---------- project / case study pages ---------- */
.project-hero{
  padding: 150px 0 60px;
}
.project-hero .tags{ display:flex; gap:10px; margin-bottom: 26px; flex-wrap: wrap; }
.project-hero h1{
  font-family: var(--serif);
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 500;
  line-height: 1.12;
  margin: 0 0 22px;
  max-width: 780px;
}
.project-hero .dek{ font-size: 18px; color: var(--ink-dim); max-width: 620px; }

.meta-strip{
  display:flex;
  gap: 40px;
  flex-wrap: wrap;
  padding: 28px 0;
  margin-top: 40px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.meta-strip div{ font-size: 13.5px; }
.meta-strip .k{ font-family: var(--mono); color: var(--ink-faint); display:block; margin-bottom: 6px; font-size:12px; }
.meta-strip .v{ color: var(--ink); }

.prose{ max-width: 720px; padding: 64px 0; }
.prose h2{
  font-family: var(--serif);
  font-size: 26px;
  font-weight: 500;
  margin: 56px 0 20px;
}
.prose h2:first-child{ margin-top:0; }
.prose h3{ font-size: 17px; font-weight: 600; margin: 32px 0 12px; }
.prose p{ color: var(--ink-dim); margin: 0 0 18px; font-size: 16.5px; }
.prose ul{ margin: 0 0 20px; padding-left: 20px; color: var(--ink-dim); }
.prose li{ margin-bottom: 10px; font-size: 16.5px; }
.prose li::marker{ color: var(--accent-2); }
.prose strong{ color: var(--ink); }
.prose blockquote{
  border-left: 2px solid var(--accent);
  margin: 32px 0;
  padding: 4px 0 4px 24px;
  font-family: var(--serif);
  font-size: 20px;
  color: var(--ink);
}
.callout-grid{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin: 20px 0 40px;
}
.callout-grid.four{ grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px){ .callout-grid.four{ grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 700px){ .callout-grid, .callout-grid.four{ grid-template-columns: 1fr; } }

.narrative{ margin: 26px 0 8px; display:flex; flex-direction:column; gap:14px; }
.n-row{ display:flex; gap:14px; align-items:flex-start; }
.n-badge{
  flex:none; width:28px; height:28px; border-radius:50%;
  background: linear-gradient(135deg, var(--accent-2), var(--accent-3));
  color: var(--bg); font-family: var(--mono); font-size:12px;
  display:flex; align-items:center; justify-content:center; margin-top:2px;
}
.n-bubble{
  background: var(--bg-elevated); border:1px solid var(--line); border-radius:14px;
  padding:16px 20px; font-size:15.5px; color: var(--ink); line-height:1.55;
}

.cap-grid{ display:grid; grid-template-columns:1fr 1fr; gap:32px; margin: 8px 0 32px; }
@media (max-width: 700px){ .cap-grid{ grid-template-columns:1fr; } }
.cap-col h3{
  font-family: var(--mono); font-size:13px; letter-spacing:.08em; text-transform:uppercase;
  color: var(--accent-2); margin: 0 0 14px; font-weight:500;
}
.cap-col ol{ margin:0; padding-left:20px; color: var(--ink-dim); font-size:15.5px; }
.cap-col ol li{ margin-bottom:10px; }
.cap-col ol li:last-child{ margin-bottom:0; }
.cap-sub{ font-size:13.5px; color: var(--ink-faint); margin:6px 0 0; }
.callout{
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
}
.callout .num{
  font-family: var(--serif);
  font-size: 30px;
  color: var(--accent);
  margin-bottom: 8px;
}
.callout .cap{ font-size: 13.5px; color: var(--ink-dim); }

.visual{
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 48px 32px;
  margin: 32px 0;
  background:
    radial-gradient(circle at 20% 20%, color-mix(in srgb, var(--accent-2) 14%, transparent), transparent 60%),
    radial-gradient(circle at 80% 80%, color-mix(in srgb, var(--accent-3) 12%, transparent), transparent 60%),
    var(--bg-elevated);
  text-align:center;
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--ink-faint);
  min-height: 160px;
  display:flex;
  align-items:center;
  justify-content:center;
}
.visual.has-image{
  padding: 0;
  background: none;
  overflow: hidden;
  display: block;
}
.visual.has-image img,
.visual.has-image video{
  width: 100%;
  height: auto;
  display: block;
  border-radius: calc(var(--radius) - 1px);
}
.visual.has-image.visual-short img{
  height: 220px;
  object-fit: cover;
  object-position: center;
}
@media (max-width: 720px){
  .visual.has-image.visual-short img{ height: 160px; }
}

.next-project{
  border-top: 1px solid var(--line);
  padding: 64px 0 90px;
}
.next-project .label{ font-family: var(--mono); font-size: 13px; color: var(--ink-faint); margin-bottom: 14px; }
.next-project h3{
  font-family: var(--serif);
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 500;
  display:flex;
  align-items:center;
  gap: 16px;
}
.next-project h3 svg{ transition: transform .3s var(--ease); }
.next-project a:hover h3 svg{ transform: translateX(8px); }

/* reveal-on-scroll — progressive enhancement only.
   Content is fully visible by default; JS adds the "js" class to <html>
   before paint, and only then do elements hide until scrolled into view.
   If JS fails or is disabled, nothing is ever hidden. */
.reveal{ opacity:1; transform:none; transition: opacity .7s var(--ease), transform .7s var(--ease); }
.js .reveal{ opacity:0; transform: translateY(16px); }
.js .reveal.in{ opacity:1; transform: translateY(0); }

/* back link */
.back-link{
  display:inline-flex; align-items:center; gap:8px;
  font-family: var(--mono); font-size: 13px; color: var(--ink-dim);
  margin-bottom: 24px;
}
.back-link:hover{ color: var(--ink); }

.method-layer{
  margin: 72px 0 0;
  padding: 32px 28px 8px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-elevated);
}
.method-layer .layer-kicker{
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0 0 10px;
}
.method-layer h2{ margin-top: 0; }
.method-layer h3{ font-family: var(--sans); }
.method-layer .note{
  border-left: 2px solid var(--accent);
  padding: 4px 0 4px 18px;
  margin: 8px 0 24px;
  color: var(--ink-dim);
  font-size: 15.5px;
}
.method-layer .note strong{ color: var(--ink); }
@media (max-width: 720px){
  .method-layer{ padding: 24px 18px 4px; }
}