/* =========================================================
   Ariel Rubinstein | personal site
   Theme: locked dark. One accent (cyan). One radius scale (14px).
   ========================================================= */

:root {
  --bg: #000000;
  --bg-2: #0a0b0d;
  --bg-3: #111317;
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.16);
  --text: #f4f6f8;
  --muted: #a3acb6;
  --accent: #22d3ee;
  --accent-strong: #67e8f9;
  --accent-ink: #04161a;
  --glow: rgba(34, 211, 238, 0.22);
  --radius: 14px;
  --nav-h: 72px;
  --container: 1200px;
  --font: "Heebo", system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, p { margin: 0; }

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 20px;
}
@media (min-width: 768px) { .container { padding-inline: 32px; } }

.skip-link {
  position: absolute; top: -60px; inset-inline-start: 16px;
  background: var(--accent); color: var(--accent-ink);
  padding: 10px 14px; border-radius: var(--radius); z-index: 100; font-weight: 600;
}
.skip-link:focus { top: 12px; }

.accent { color: var(--accent); }
.nowrap { white-space: nowrap; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 52px; padding: 0 26px;
  border-radius: var(--radius); font-weight: 700; font-size: 17px; white-space: nowrap;
  border: 1px solid transparent; cursor: pointer; font-family: inherit;
  transition: transform 160ms ease, background-color 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}
.btn:active { transform: translateY(1px) scale(0.985); }
.btn--primary {
  background: var(--accent); color: var(--accent-ink);
  box-shadow: 0 0 0 0 var(--glow);
}
.btn--primary:hover { background: var(--accent-strong); box-shadow: 0 10px 30px -8px var(--glow); }
.btn--ghost { color: var(--text); border-color: var(--line-strong); background: rgba(255,255,255,0.02); }
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn--block { width: 100%; }
.btn .ph { font-size: 20px; }

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(0, 0, 0, 0.72);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav__inner { height: var(--nav-h); display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.nav__brand { display: inline-flex; align-items: center; font-weight: 800; font-size: 22px; letter-spacing: -0.01em; }
.nav__mark {
  width: 38px; height: 38px; display: grid; place-items: center;
  border-radius: var(--radius); background: var(--accent); color: var(--accent-ink);
  font-weight: 900; font-size: 20px; line-height: 1;
}
.nav__links { display: none; gap: 30px; font-weight: 500; color: var(--muted); }
.nav__links a { position: relative; padding: 6px 0; transition: color 160ms ease; }
.nav__links a::after {
  content: ""; position: absolute; inset-inline: 0; bottom: 0; height: 2px;
  background: var(--accent); transform: scaleX(0); transform-origin: center; transition: transform 200ms ease;
}
.nav__links a:hover, .nav__links a.is-active { color: var(--text); }
.nav__links a:hover::after, .nav__links a.is-active::after { transform: scaleX(1); }
.nav__toggle {
  display: grid; place-items: center; width: 44px; height: 44px;
  background: transparent; border: 1px solid var(--line-strong); border-radius: var(--radius);
  color: var(--text); font-size: 24px; cursor: pointer;
}
.nav__mobile {
  display: none; flex-direction: column; gap: 4px;
  padding: 10px 20px 18px; border-top: 1px solid var(--line); background: rgba(0,0,0,0.92);
}
.nav__mobile a { padding: 12px 8px; border-radius: var(--radius); font-weight: 500; }
.nav__mobile a:hover { background: var(--bg-3); color: var(--accent); }
.nav.is-open .nav__mobile { display: flex; }
@media (min-width: 900px) {
  .nav__links { display: flex; }
  .nav__toggle, .nav__mobile { display: none !important; }
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: calc(100dvh - var(--nav-h));
  display: flex; align-items: center;
  padding-block: 48px 40px;
  overflow: hidden;
}
.hero__glow {
  position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(60% 50% at 20% 50%, rgba(34,211,238,0.14), transparent 70%),
    radial-gradient(40% 40% at 85% 20%, rgba(34,211,238,0.06), transparent 70%);
}
.hero__grid {
  position: relative;
  display: grid; grid-template-columns: 1fr; gap: 36px; align-items: center;
}
.hero__title {
  font-size: clamp(32px, 4.6vw, 54px);
  line-height: 1.1; font-weight: 900; letter-spacing: -0.01em;
  max-width: 20ch;
}
.hero__sub {
  margin-top: 22px; max-width: 48ch;
  font-size: clamp(17px, 1.6vw, 20px); color: var(--muted); font-weight: 400;
}
.hero__cta { margin-top: 32px; display: flex; flex-wrap: wrap; gap: 12px; }
.hero__media { position: relative; justify-self: center; width: min(100%, 460px); aspect-ratio: 1 / 1; }
@media (max-width: 899px) {
  .hero { padding-block: 24px 40px; min-height: 0; }
  .hero__grid { gap: 20px; }
  .hero__media { width: min(68%, 300px); margin-top: 4px; }
  .hero__title { text-align: center; max-width: none; margin-inline: auto; }
  .hero__sub { text-align: center; margin-inline: auto; margin-top: 14px; }
  .hero__cta { justify-content: center; margin-top: 18px; }
  .hero__cta .btn { min-height: 48px; padding: 0 20px; }
}
.hero__media img {
  position: relative; z-index: 1; width: 100%; height: 100%; object-fit: contain; object-position: bottom;
  -webkit-mask-image: linear-gradient(to bottom, #000 80%, transparent 100%);
          mask-image: linear-gradient(to bottom, #000 80%, transparent 100%);
  filter: drop-shadow(0 24px 40px rgba(0,0,0,0.6));
}
.hero__backdrop {
  position: absolute; inset: 2% 0 0 0; border-radius: 28px;
  background: radial-gradient(circle at 1px 1px, rgba(255,255,255,0.16) 1.2px, transparent 2px) 0 0 / 20px 20px;
  -webkit-mask-image: radial-gradient(70% 70% at 50% 45%, #000 40%, transparent 100%);
          mask-image: radial-gradient(70% 70% at 50% 45%, #000 40%, transparent 100%);
}
@media (min-width: 900px) {
  .hero__grid { grid-template-columns: 1.15fr 0.85fr; gap: 48px; }
  .hero__media { width: 100%; max-width: 520px; justify-self: start; }
}

/* ---------- Proof strip ---------- */
.proof { border-block: 1px solid var(--line); background: var(--bg-2); }
.proof__grid {
  display: grid; grid-template-columns: 1fr 1fr;
}
.proof__item {
  display: flex; align-items: center; gap: 14px; padding: 22px 8px;
  border-bottom: 1px solid var(--line);
}
.proof__item:nth-child(odd) { border-inline-end: 1px solid var(--line); }
.proof__item:nth-child(n+3) { border-bottom: 0; }
.proof__item .ph { font-size: 28px; color: var(--accent); flex: none; }
.proof__logo { width: 40px; height: 40px; flex: none; border-radius: 10px; }
.proof__logo--round { border-radius: 50%; }
.proof__logo--cc { background: #000; }
.tile__logo--round { border-radius: 50%; }
.proof__item strong { display: block; font-size: 20px; font-weight: 800; line-height: 1.2; }
.proof__item span { display: block; color: var(--muted); font-size: 14px; }
@media (min-width: 900px) {
  .proof__grid { grid-template-columns: repeat(4, 1fr); }
  .proof__item { border-bottom: 0; padding: 26px 20px; }
  .proof__item:not(:last-child) { border-inline-end: 1px solid var(--line); }
  .proof__item:nth-child(odd) { border-inline-end: 1px solid var(--line); }
  .proof__item:last-child { border-inline-end: 0; }
}

/* ---------- Sections ---------- */
.section { padding-block: 88px; }
@media (min-width: 900px) { .section { padding-block: 120px; } }
.section__title {
  font-size: clamp(30px, 4.2vw, 48px); font-weight: 800; line-height: 1.15; letter-spacing: -0.01em;
}
.section__lead { margin-top: 14px; color: var(--muted); max-width: 60ch; font-size: 18px; }

/* ---------- About ---------- */
.about { background: var(--bg); }
.about__grid { display: grid; grid-template-columns: 1fr; gap: 40px; align-items: center; }
.about__media { margin: 0; position: relative; border-radius: var(--radius); overflow: hidden; }
.about__media img { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; }
.about__media::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(to top, rgba(0,0,0,0.55), transparent 55%);
}
.about__copy p { margin-top: 18px; color: var(--muted); max-width: 60ch; }
.about__copy .section__title + p { margin-top: 22px; }
.about__points { margin-top: 28px; display: grid; gap: 14px; }
.about__points li {
  display: flex; align-items: flex-start; gap: 14px;
  padding: 16px 18px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg-2);
}
.about__points .ph { font-size: 24px; color: var(--accent); flex: none; margin-top: 2px; }
@media (min-width: 900px) {
  .about__grid { grid-template-columns: 0.85fr 1.15fr; gap: 72px; }
}

/* ---------- Timeline ---------- */
.timeline { background: var(--bg-2); border-block: 1px solid var(--line); }
.timeline__list { margin-top: 48px; position: relative; display: grid; gap: 0; }
.timeline__item {
  position: relative; display: grid; grid-template-columns: 1fr; gap: 8px;
  padding: 28px 0 28px 0; border-top: 1px solid var(--line);
}
.timeline__item:last-child { border-bottom: 1px solid var(--line); }
.timeline__when { color: var(--accent); font-weight: 700; font-size: 15px; letter-spacing: 0.02em; }
.timeline__body h3 { font-size: 22px; font-weight: 800; }
.timeline__org { color: var(--text); font-weight: 500; margin-top: 2px; }
.timeline__body p:not(.timeline__org) { margin-top: 10px; color: var(--muted); max-width: 64ch; }
@media (min-width: 900px) {
  .timeline__list { margin-top: 56px; }
  .timeline__item { grid-template-columns: 180px 1fr; gap: 32px; padding: 34px 0; }
  .timeline__when { padding-top: 6px; }
}

/* ---------- Skills ---------- */
.skills__grid { margin-top: 44px; display: grid; grid-template-columns: 1fr; gap: 16px; }
.skills__group {
  padding: 26px; border-radius: var(--radius);
  border: 1px solid var(--line); background: var(--bg-2);
}
.skills__group:nth-child(1) { background: linear-gradient(145deg, rgba(34,211,238,0.10), var(--bg-2) 55%); }
.skills__group:nth-child(4) { background: linear-gradient(325deg, rgba(34,211,238,0.10), var(--bg-2) 55%); }
.skills__head { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }
.skills__head .ph { font-size: 26px; color: var(--accent); }
.skills__head h3 { font-size: 20px; font-weight: 800; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chips li {
  padding: 7px 13px; border-radius: var(--radius);
  border: 1px solid var(--line-strong); background: rgba(255,255,255,0.03);
  font-size: 15px; font-weight: 500; color: var(--text);
}
@media (min-width: 768px) { .skills__grid { grid-template-columns: 1fr 1fr; gap: 20px; } }

/* ---------- Projects bento ---------- */
.projects { background: var(--bg-2); border-block: 1px solid var(--line); }
.bento {
  margin-top: 44px;
  display: grid; grid-template-columns: 1fr; gap: 18px;
}
.tile {
  position: relative; overflow: hidden; isolation: isolate;
  border-radius: var(--radius); border: 1px solid var(--line); background: var(--bg-3);
  min-height: 260px; display: flex; flex-direction: column;
  transition: border-color 200ms ease, transform 200ms ease;
}
.tile:hover { border-color: rgba(34,211,238,0.45); transform: translateY(-2px); }
.tile__text { position: relative; z-index: 2; padding: 28px; display: flex; flex-direction: column; gap: 12px; max-width: 46ch; }
.tile__logo { width: 48px; height: 48px; border-radius: 12px; }
.tile h3 { font-size: 26px; font-weight: 800; }
.tile p { color: var(--muted); font-size: 16px; }
.tile__stack { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 4px; }
.tile__stack li { font-size: 13px; font-weight: 600; color: var(--accent); background: rgba(34,211,238,0.10); padding: 4px 10px; border-radius: var(--radius); }
.tile__link { margin-top: auto; padding-top: 12px; display: inline-flex; align-items: center; gap: 6px; font-weight: 700; color: var(--text); }
.tile__link:hover { color: var(--accent); }
.tile__link .ph { font-size: 18px; }

/* Kumu: large with two phones */
.tile--kumu { background: linear-gradient(135deg, #16181c, #0e1013 60%); }
.tile--kumu .tile__text { padding-bottom: 0; }
.tile__phones { position: relative; z-index: 1; display: flex; justify-content: center; padding: 12px 28px 0; }
.tile__phones img {
  width: 62%; max-width: 260px; border-radius: 22px 22px 0 0;
  border: 1px solid var(--line-strong); border-bottom: 0;
  box-shadow: 0 -10px 40px -10px rgba(34,211,238,0.25);
}

/* ZeroCam: real site screenshot in flow, text below */
.tile--zerocam .tile__bg {
  position: relative; z-index: 0; width: 100%; height: auto; display: block;
  -webkit-mask-image: linear-gradient(to bottom, #000 70%, transparent 100%);
          mask-image: linear-gradient(to bottom, #000 70%, transparent 100%);
  transition: opacity 300ms ease; opacity: 0.95;
}
.tile--zerocam:hover .tile__bg { opacity: 1; }
.tile--zerocam .tile__text { margin-top: -36px; flex: 1; max-width: none; justify-content: flex-start; }
.tile--zerocam .tile__bg { width: 100%; height: auto; max-height: none; }

/* Pricio: gradient */
.tile--pricio { background: linear-gradient(160deg, rgba(34,211,238,0.22), var(--bg-3) 60%); }

/* Relto: wordmark */
.tile--relto { background: var(--bg-3); }

/* Automation: AI character still from a real ad */
.tile--auto { background: radial-gradient(80% 70% at 100% 0%, rgba(34,211,238,0.14), var(--bg-3) 70%); }
.tile--auto .tile__bg {
  position: absolute; inset: 0; z-index: 0; width: 100%; height: 100%; object-fit: cover; object-position: 50% 45%;
  opacity: 0.5;
  -webkit-mask-image: linear-gradient(to top, #000 0%, rgba(0,0,0,0.6) 35%, transparent 72%);
          mask-image: linear-gradient(to top, #000 0%, rgba(0,0,0,0.6) 35%, transparent 72%);
}
.tile--auto .tile__text { justify-content: flex-start; }
.tile--auto { min-height: 360px; }

@media (min-width: 768px) {
  .bento { grid-template-columns: repeat(6, 1fr); grid-auto-rows: minmax(240px, auto); }
  .tile--kumu { grid-column: span 6; flex-direction: row; align-items: stretch; }
  .tile--kumu .tile__text { flex: 1 1 50%; padding-bottom: 28px; }
  .tile__phones { flex: 1 1 50%; align-items: flex-end; padding: 24px 24px 0; }
  .tile--zerocam { grid-column: span 6; }
  .tile--pricio { grid-column: span 2; }
  .tile--relto { grid-column: span 2; }
  .tile--auto { grid-column: span 2; }
}
@media (min-width: 1024px) {
  .tile--kumu { grid-column: span 3; grid-row: span 2; flex-direction: column; }
  .tile--kumu .tile__text { flex: 0 0 auto; padding-bottom: 0; }
  .tile__phones { flex: 0 0 auto; align-items: flex-start; justify-content: center; padding: 8px 28px 0; height: 320px; overflow: hidden; }
  .tile__phones img { width: auto; max-width: 100%; height: 320px; object-fit: contain; object-position: top center; }
  .tile--zerocam { grid-column: span 3; grid-row: span 2; }
  .tile--pricio { grid-column: span 2; }
  .tile--relto { grid-column: span 2; }
  .tile--auto { grid-column: span 2; }
  .tile--auto .tile__text { max-width: 52ch; }
}

/* ---------- Courses ---------- */
.courses__grid { margin-top: 44px; display: grid; grid-template-columns: 1fr; gap: 14px; }
.course {
  display: flex; gap: 16px; align-items: flex-start;
  padding: 22px; border-radius: var(--radius); border: 1px solid var(--line); background: var(--bg-2);
}
.course .ph { font-size: 28px; color: var(--accent); flex: none; margin-top: 2px; }
.course h3 { font-size: 19px; font-weight: 800; }
.course p { color: var(--muted); font-size: 15px; margin-top: 4px; }
@media (min-width: 768px) { .courses__grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1024px) { .courses__grid { grid-template-columns: repeat(3, 1fr); } }

/* ---------- Contact ---------- */
.contact {
  position: relative; background: var(--bg-2); border-top: 1px solid var(--line); overflow: hidden;
}
.contact::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(50% 60% at 80% 100%, rgba(34,211,238,0.14), transparent 70%);
}
.contact__grid { position: relative; display: grid; grid-template-columns: 1fr; gap: 40px; align-items: start; }
.contact__copy p { margin-top: 18px; color: var(--muted); max-width: 46ch; font-size: 18px; }
.contact__links { margin-top: 28px; display: grid; gap: 12px; }
.contact__links li { display: flex; align-items: center; gap: 12px; }
.contact__links .ph { font-size: 22px; color: var(--accent); }
.contact__links a:hover { color: var(--accent); }

.form {
  padding: 28px; border-radius: var(--radius);
  border: 1px solid var(--line-strong); background: var(--bg);
  display: grid; gap: 18px;
}
.form__honey { position: absolute; inset-inline-start: -9999px; opacity: 0; height: 0; width: 0; }
.form__field { display: grid; gap: 8px; }
.form label { font-weight: 600; font-size: 15px; }
.form input[type="text"], .form input[type="tel"] {
  width: 100%; min-height: 52px; padding: 0 16px;
  background: var(--bg-3); color: var(--text); border: 1px solid var(--line-strong); border-radius: var(--radius);
  font: inherit; font-size: 17px;
  transition: border-color 160ms ease, box-shadow 160ms ease;
}
.form input::placeholder { color: #6f7883; }
.form input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(34,211,238,0.25); }
.form input[aria-invalid="true"] { border-color: #fb7185; }
.form__error { min-height: 0; font-size: 14px; color: #fda4af; }
.form__error:empty { display: none; }
.form__consent { display: flex; align-items: flex-start; gap: 10px; font-size: 14px; color: var(--muted); cursor: pointer; }
.form__consent input { margin-top: 4px; accent-color: var(--accent); width: 18px; height: 18px; flex: none; }
.form__status { font-size: 15px; font-weight: 500; }
.form__status:empty { display: none; }
.form__status.is-ok { color: var(--accent-strong); }
.form__status.is-err { color: #fda4af; }
.btn__spinner {
  display: none; width: 18px; height: 18px; border-radius: 50%;
  border: 2px solid rgba(4,22,26,0.3); border-top-color: var(--accent-ink);
  animation: spin 700ms linear infinite;
}
.form.is-sending .btn__spinner { display: inline-block; }
.form.is-sending .btn { pointer-events: none; opacity: 0.85; }
@keyframes spin { to { transform: rotate(360deg); } }
@media (min-width: 900px) {
  .contact__grid { grid-template-columns: 1fr 1fr; gap: 72px; }
  .form { padding: 36px; }
}

/* ---------- Footer ---------- */
.footer { border-top: 1px solid var(--line); padding-block: 26px; color: var(--muted); font-size: 14px; }
.footer__inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px 24px; }
.footer__links { display: flex; gap: 20px; }
.footer__links a:hover { color: var(--accent); }

/* ---------- WhatsApp float ---------- */
.whatsapp {
  position: fixed; inset-inline-start: 18px; bottom: 18px; z-index: 60;
  width: 64px; height: 64px; display: grid; place-items: center;
  border-radius: 50%; background: #25d366; color: #ffffff; font-size: 38px;
  border: 3px solid rgba(255,255,255,0.9);
  box-shadow: 0 10px 30px -6px rgba(37,211,102,0.75), 0 0 0 0 rgba(37,211,102,0.5);
  transition: transform 160ms ease;
}
.whatsapp::before {
  content: ""; position: absolute; inset: -6px; border-radius: 50%;
  border: 2px solid rgba(37,211,102,0.7);
  animation: wa-pulse 2.2s ease-out infinite;
}
.whatsapp:hover { transform: translateY(-2px) scale(1.05); }
@keyframes wa-pulse {
  0% { transform: scale(0.9); opacity: 0.9; }
  100% { transform: scale(1.45); opacity: 0; }
}
@media (prefers-reduced-motion: reduce) { .whatsapp::before { animation: none; opacity: 0; } }
@media (min-width: 900px) { .whatsapp { width: 68px; height: 68px; font-size: 40px; inset-inline-start: 24px; bottom: 24px; } }

/* ---------- Motion ---------- */
.reveal { opacity: 0; transform: translateY(18px); will-change: opacity, transform; }
.no-js .reveal, .reduced-motion .reveal { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; }
  .btn, .tile, .whatsapp { transition: none; }
}