/* ============================================================
   Portfolio — Nahuel Mosconi
   ============================================================ */

/* ---------- Design tokens ---------- */
:root {
  --bg: #0b0e14;
  --bg-alt: #0f131c;
  --surface: #151b28;
  --surface-2: #1b2233;
  --border: #232c3f;
  --text: #e7ecf3;
  --text-dim: #9aa7bd;
  --text-mute: #6c7891;
  --primary: #6d8bff;
  --primary-2: #9b6dff;
  --accent: #37e0b0;
  --grad: linear-gradient(120deg, #6d8bff 0%, #9b6dff 50%, #37e0b0 100%);
  --shadow: 0 20px 50px -20px rgba(0, 0, 0, 0.6);
  --radius: 16px;
  --maxw: 1120px;
  --font-sans: "Inter", system-ui, sans-serif;
  --font-head: "Sora", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", monospace;
}

:root[data-theme="light"] {
  --bg: #f7f8fb;
  --bg-alt: #eef1f7;
  --surface: #ffffff;
  --surface-2: #f2f5fb;
  --border: #e2e7f0;
  --text: #131722;
  --text-dim: #4a5568;
  --text-mute: #7b8494;
  --shadow: 0 20px 50px -24px rgba(20, 30, 60, 0.25);
}

/* ---------- Reset & base ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 84px; }

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background 0.4s ease, color 0.4s ease;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ---------- Scroll progress ---------- */
.scroll-progress {
  position: fixed; top: 0; left: 0; height: 3px; width: 0%;
  background: var(--grad); z-index: 1000; transition: width 0.1s linear;
}

/* ---------- Header / Nav ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 900;
  transition: background 0.3s ease, border-color 0.3s ease, backdrop-filter 0.3s ease;
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(14px);
  border-bottom-color: var(--border);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.nav__brand { display: flex; align-items: center; }
.nav__logo {
  font-family: var(--font-head); font-weight: 800; font-size: 1.15rem;
  display: grid; place-items: center; width: 42px; height: 42px;
  border-radius: 12px; background: var(--grad); color: #0b0e14;
}
.nav__menu { display: flex; align-items: center; gap: 8px; }
.nav__link {
  font-size: 0.94rem; font-weight: 500; color: var(--text-dim);
  padding: 8px 14px; border-radius: 10px; transition: color 0.2s, background 0.2s;
}
.nav__link:hover, .nav__link.active { color: var(--text); background: var(--surface); }

.theme-toggle {
  background: var(--surface); border: 1px solid var(--border); cursor: pointer;
  width: 40px; height: 40px; border-radius: 10px; font-size: 1.05rem;
  display: grid; place-items: center; transition: transform 0.2s, background 0.2s;
}
.theme-toggle:hover { transform: rotate(-15deg) scale(1.05); }

.nav__toggle {
  display: none; flex-direction: column; gap: 5px; background: none; border: none;
  cursor: pointer; padding: 8px;
}
.nav__toggle span {
  width: 24px; height: 2px; background: var(--text); border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}
.nav__toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__toggle.open span:nth-child(2) { opacity: 0; }
.nav__toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--font-head); font-weight: 600; font-size: 0.95rem;
  padding: 13px 26px; border-radius: 12px; cursor: pointer; border: 1px solid transparent;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s, border-color 0.2s;
}
.btn--lg { padding: 16px 34px; font-size: 1.02rem; margin-top: 8px; }
.btn--primary { background: var(--grad); color: #0b0e14; box-shadow: 0 12px 30px -12px rgba(109, 139, 255, 0.6); }
.btn--primary:hover { transform: translateY(-3px); box-shadow: 0 18px 40px -14px rgba(109, 139, 255, 0.75); }
.btn--ghost { background: transparent; color: var(--text); border-color: var(--border); }
.btn--ghost:hover { transform: translateY(-3px); border-color: var(--primary); background: var(--surface); }

/* ---------- Hero ---------- */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; overflow: hidden; }
.hero__glow {
  position: absolute; top: -20%; left: 50%; transform: translateX(-50%);
  width: 900px; height: 900px; max-width: 130vw;
  background: radial-gradient(circle at center, rgba(109,139,255,0.18), rgba(155,109,255,0.10) 40%, transparent 68%);
  filter: blur(20px); pointer-events: none; z-index: 0;
}
.hero__inner { position: relative; z-index: 1; padding: 120px 24px 80px; max-width: 860px; }
.hero__eyebrow {
  display: inline-flex; align-items: center; gap: 9px; font-size: 0.88rem;
  color: var(--text-dim); background: var(--surface); border: 1px solid var(--border);
  padding: 7px 16px; border-radius: 100px; margin-bottom: 26px; font-weight: 500;
}
.hero__ping {
  width: 8px; height: 8px; border-radius: 50%; background: var(--accent);
  box-shadow: 0 0 0 0 rgba(55,224,176,0.7); animation: ping 2s infinite;
}
@keyframes ping {
  0% { box-shadow: 0 0 0 0 rgba(55,224,176,0.55); }
  70% { box-shadow: 0 0 0 9px rgba(55,224,176,0); }
  100% { box-shadow: 0 0 0 0 rgba(55,224,176,0); }
}
.hero__title { font-family: var(--font-head); font-weight: 800; font-size: clamp(2.4rem, 7vw, 4.6rem); line-height: 1.05; letter-spacing: -0.02em; }
.hero__subtitle { font-family: var(--font-head); font-size: clamp(1.2rem, 3vw, 1.7rem); font-weight: 600; color: var(--text-dim); margin-top: 18px; }
.hero__desc { font-size: clamp(1rem, 2vw, 1.15rem); color: var(--text-dim); margin-top: 22px; max-width: 640px; }
.chip-inline {
  font-family: var(--font-mono); font-size: 0.86em; color: var(--text);
  background: var(--surface); border: 1px solid var(--border);
  padding: 1px 8px; border-radius: 6px; white-space: nowrap;
}
.hero__actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 36px; }
.hero__socials { display: flex; gap: 12px; margin-top: 34px; }
.social-link {
  display: grid; place-items: center; width: 46px; height: 46px; border-radius: 12px;
  background: var(--surface); border: 1px solid var(--border); color: var(--text-dim);
  transition: transform 0.2s, color 0.2s, border-color 0.2s;
}
.social-link:hover { transform: translateY(-3px); color: var(--text); border-color: var(--primary); }

/* ---------- Sections ---------- */
.section { padding: 100px 0; }
.section--alt { background: var(--bg-alt); }
.section__head { display: flex; align-items: baseline; gap: 16px; margin-bottom: 44px; }
.section__num { font-family: var(--font-mono); font-size: 0.95rem; color: var(--primary); }
.section__title { font-family: var(--font-head); font-weight: 700; font-size: clamp(1.7rem, 4vw, 2.5rem); letter-spacing: -0.02em; }
.section__lead { color: var(--text-dim); max-width: 620px; margin: -28px 0 44px; font-size: 1.02rem; }

/* ---------- About ---------- */
.about { display: grid; grid-template-columns: 1.5fr 1fr; gap: 44px; align-items: start; }
.about__text p { color: var(--text-dim); margin-bottom: 18px; font-size: 1.05rem; }
.about__text strong { color: var(--text); font-weight: 600; }
.about__facts {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 8px 22px; box-shadow: var(--shadow);
}
.about__facts li { display: flex; justify-content: space-between; gap: 16px; padding: 16px 0; border-bottom: 1px solid var(--border); flex-wrap: wrap; }
.about__facts li:last-child { border-bottom: none; }
.about__fact-k { color: var(--text-mute); font-size: 0.92rem; }
.about__fact-v { color: var(--text); font-weight: 600; font-size: 0.95rem; }

/* ---------- Stack ---------- */
.stack-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.stack-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 26px 24px; transition: transform 0.25s, border-color 0.25s;
}
.stack-card:hover { transform: translateY(-5px); border-color: var(--primary); }
.stack-card__title { font-family: var(--font-head); font-size: 1.1rem; margin-bottom: 16px; }
.stack-list { display: flex; flex-wrap: wrap; gap: 8px; }
.stack-list li {
  font-family: var(--font-mono); font-size: 0.82rem; color: var(--text-dim);
  background: var(--surface-2); border: 1px solid var(--border);
  padding: 5px 11px; border-radius: 8px;
}

/* ---------- Projects ---------- */
.projects-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 22px; }
.project-card {
  position: relative; display: flex; flex-direction: column;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; transition: transform 0.28s, border-color 0.28s, box-shadow 0.28s;
}
.project-card::before {
  content: ""; position: absolute; inset: 0; padding: 1px; border-radius: var(--radius);
  background: var(--grad); -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude; opacity: 0; transition: opacity 0.28s;
  pointer-events: none; z-index: 2;
}
.project-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.project-card:hover::before { opacity: 1; }

.project-card__media {
  position: relative; height: 190px; overflow: hidden;
  border-bottom: 1px solid var(--border); background: var(--surface-2);
}
.project-card__media img {
  width: 100%; height: 100%; object-fit: cover; object-position: top center;
  transition: transform 0.4s ease;
}
.project-card:hover .project-card__media img { transform: scale(1.04); }
.project-card__media--placeholder {
  display: grid; place-items: center;
  background: linear-gradient(135deg, color-mix(in srgb, var(--primary) 16%, var(--surface)), color-mix(in srgb, var(--primary-2) 16%, var(--surface)));
}
.project-card__media--placeholder span { font-size: 3.4rem; filter: drop-shadow(0 6px 14px rgba(0,0,0,0.35)); }

.project-card__body { display: flex; flex-direction: column; flex: 1; padding: 22px 24px 24px; }
.project-card__top { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 12px; }
.project-card__title { font-family: var(--font-head); font-size: 1.18rem; font-weight: 700; }
.project-card__links { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.project-card__ext {
  display: grid; place-items: center; width: 32px; height: 32px; border-radius: 9px;
  background: var(--surface-2); border: 1px solid var(--border); color: var(--text-dim);
  transition: color 0.2s, border-color 0.2s;
}
.project-card__ext:hover { color: var(--text); border-color: var(--primary); }
.project-card__desc { color: var(--text-dim); font-size: 0.94rem; flex: 1; margin-bottom: 18px; }
.project-card__tags { display: flex; flex-wrap: wrap; gap: 7px; }
.project-card__tag {
  font-family: var(--font-mono); font-size: 0.72rem; color: var(--primary);
  background: color-mix(in srgb, var(--primary) 12%, transparent);
  padding: 4px 9px; border-radius: 7px;
}
.project-card__badge {
  font-size: 0.66rem; font-weight: 600; letter-spacing: 0.02em;
  color: var(--text-mute); background: var(--surface-2); border: 1px solid var(--border);
  padding: 3px 9px; border-radius: 100px; white-space: nowrap;
}
.project-card__badge--public { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 40%, var(--border)); }

/* ---------- Contact ---------- */
.contact { text-align: center; max-width: 760px; margin: 0 auto; }
.contact__lead { font-size: 1.15rem; color: var(--text-dim); margin-bottom: 36px; }
.contact__links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 38px; }
.contact__card {
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 26px 18px; transition: transform 0.22s, border-color 0.22s;
}
.contact__card:hover { transform: translateY(-5px); border-color: var(--primary); }
.contact__icon { font-size: 1.7rem; }
.contact__k { font-size: 0.82rem; color: var(--text-mute); text-transform: uppercase; letter-spacing: 0.05em; }
.contact__v { font-weight: 600; font-size: 0.92rem; word-break: break-word; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--border); padding: 30px 0; }
.site-footer__inner { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; color: var(--text-mute); font-size: 0.9rem; }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.7s cubic-bezier(0.16,1,0.3,1), transform 0.7s cubic-bezier(0.16,1,0.3,1); }
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
  .hero__ping { animation: none; }
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .about { grid-template-columns: 1fr; }
  .stack-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
  .nav__toggle { display: flex; z-index: 950; }
  .nav__menu {
    position: fixed; inset: 0 0 0 auto; width: min(78vw, 320px);
    flex-direction: column; align-items: flex-start; justify-content: center; gap: 6px;
    background: var(--bg-alt); border-left: 1px solid var(--border); padding: 40px 30px;
    transform: translateX(100%); transition: transform 0.35s cubic-bezier(0.16,1,0.3,1);
  }
  .nav__menu.open { transform: none; box-shadow: -30px 0 60px -20px rgba(0,0,0,0.5); }
  .nav__link { font-size: 1.1rem; width: 100%; }
  .contact__links { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .stack-grid { grid-template-columns: 1fr; }
  .section { padding: 72px 0; }
  .hero__actions { width: 100%; }
  .hero__actions .btn { flex: 1; }
}