/* ==========================================================================
   Samuel Castillo — Portafolio
   Tokens, base, layout y componentes. Sin dependencias externas.
   ========================================================================== */

:root {
  --bg: #f6f7fb;
  --surface: #ffffff;
  --surface-2: #eef1f8;
  --text: #141824;
  --text-muted: #4a5266;
  --border: #dde2ee;
  --accent: #2563eb;
  --accent-strong: #1d4ed8;
  --accent-soft: #e0e9ff;
  --pixel: #e60012;
  --pixel-gold: #d4a514;
  --on-accent: #ffffff;
  --shadow: 0 1px 2px rgba(20, 24, 36, .06), 0 8px 24px rgba(20, 24, 36, .06);

  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-pixel: "Press Start 2P", ui-monospace, monospace;

  --radius: 14px;
  --radius-sm: 8px;
  --container: 1120px;
  --gutter: clamp(16px, 4vw, 32px);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1017;
    --surface: #151a24;
    --surface-2: #1c2230;
    --text: #e8ebf3;
    --text-muted: #a3abbd;
    --border: #283042;
    --accent: #6d9bff;
    --accent-strong: #93b4ff;
    --accent-soft: #1d2a4a;
    --on-accent: #0d1017;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .25);
    color-scheme: dark;
  }
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); text-underline-offset: 3px; }
a:hover { color: var(--accent-strong); }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

h1, h2, h3 { line-height: 1.2; letter-spacing: -0.02em; margin: 0 0 .5em; }
h1 { font-size: clamp(2.1rem, 5vw, 3.4rem); font-weight: 800; }
h2 { font-size: clamp(1.6rem, 3.2vw, 2.25rem); font-weight: 800; }
h3 { font-size: 1.25rem; font-weight: 700; }
p { margin: 0 0 1em; }

.container { width: min(var(--container), 100% - 2 * var(--gutter)); margin-inline: auto; }

.skip-link {
  position: absolute; left: 16px; top: -100px; z-index: 100;
  background: var(--accent); color: var(--on-accent);
  padding: 10px 16px; border-radius: var(--radius-sm); font-weight: 700;
}
.skip-link:focus { top: 12px; }

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

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: saturate(160%) blur(10px);
  -webkit-backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--border);
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 64px; }

.brand {
  display: inline-flex; align-items: center; gap: 10px;
  color: var(--text); text-decoration: none; font-weight: 800;
  background: none; border: 0; padding: 0; cursor: pointer; font: inherit; font-weight: 800;
}
.brand-mark {
  display: grid; place-items: center; width: 36px; height: 36px;
  font-family: var(--font-pixel); font-size: 11px; color: #fff;
  background: var(--pixel); border: 3px solid var(--pixel-gold); border-radius: 6px;
  box-shadow: inset 0 -4px 0 rgba(0, 0, 0, .25);
}

.nav-toggle {
  display: none; background: none; border: 1px solid var(--border); color: var(--text);
  border-radius: var(--radius-sm); padding: 8px 12px; font: inherit; font-weight: 600; cursor: pointer;
}
.site-nav ul { display: flex; gap: 4px; list-style: none; margin: 0; padding: 0; }
.site-nav a {
  display: block; padding: 8px 12px; border-radius: var(--radius-sm);
  color: var(--text-muted); text-decoration: none; font-weight: 600; font-size: .95rem;
}
.site-nav a:hover { color: var(--text); background: var(--surface-2); }

@media (max-width: 860px) {
  .nav-toggle { display: inline-block; }
  .site-nav {
    position: absolute; inset: 64px 0 auto 0; display: none;
    background: var(--bg); border-bottom: 1px solid var(--border); padding: 8px var(--gutter) 16px;
  }
  .site-nav.is-open { display: block; }
  .site-nav ul { flex-direction: column; }
  .site-nav a { padding: 12px; font-size: 1rem; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 46px; padding: 10px 20px; border-radius: 999px;
  font-weight: 700; font-size: 1rem; text-decoration: none; cursor: pointer;
  border: 2px solid transparent; transition: transform .15s ease, background-color .15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--accent); color: var(--on-accent); }
.btn-primary:hover { background: var(--accent-strong); color: var(--on-accent); }
.btn-ghost { border-color: var(--border); color: var(--text); background: var(--surface); }
.btn-ghost:hover { border-color: var(--accent); color: var(--text); }
.btn-sm { min-height: 38px; padding: 6px 14px; font-size: .9rem; }
.btn svg { width: 18px; height: 18px; flex: none; }

/* ---------- Hero ---------- */
.hero { padding: clamp(48px, 8vw, 96px) 0 clamp(40px, 6vw, 72px); }
.hero .container { display: grid; grid-template-columns: 1.4fr 1fr; gap: clamp(28px, 5vw, 64px); align-items: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-pixel); font-size: .62rem; line-height: 1.8; letter-spacing: .02em;
  color: var(--accent); text-transform: uppercase; margin-bottom: 18px;
}
.eyebrow::before { content: ""; width: 10px; height: 10px; background: var(--pixel); box-shadow: 0 0 0 2px var(--pixel-gold); }
.hero h1 span { display: block; color: var(--text-muted); font-weight: 700; font-size: .62em; margin-top: .25em; }
.lead { font-size: clamp(1.1rem, 2vw, 1.25rem); color: var(--text-muted); max-width: 60ch; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0; }
.hero-facts { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; padding: 0; margin: 0; }
.hero-facts li {
  font-size: .88rem; font-weight: 600; color: var(--text-muted);
  background: var(--surface); border: 1px solid var(--border); border-radius: 999px; padding: 6px 12px;
}
.hero-photo { position: relative; }
.hero-photo img {
  width: 100%; aspect-ratio: 1 / 1; object-fit: cover; object-position: 60% 30%;
  border-radius: 24px; border: 4px solid var(--surface); box-shadow: var(--shadow);
}
.hero-photo::after {
  content: ""; position: absolute; inset: 16px -16px -16px 16px; z-index: -1;
  border-radius: 24px; background: repeating-linear-gradient(45deg, var(--accent-soft) 0 8px, transparent 8px 16px);
}

@media (max-width: 760px) {
  .hero .container { grid-template-columns: 1fr; }
  .hero-photo { order: -1; max-width: 220px; }
  .hero-photo::after { inset: 10px -10px -10px 10px; }
}

/* ---------- Sections ---------- */
.section { padding: clamp(56px, 8vw, 96px) 0; }
.section-alt { background: var(--surface); border-block: 1px solid var(--border); }
.section-head { max-width: 70ch; margin-bottom: clamp(28px, 4vw, 44px); }
.section-head p { color: var(--text-muted); font-size: 1.1rem; }

.prose { max-width: 70ch; }
.prose p { color: var(--text-muted); }
.prose strong { color: var(--text); }

.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(24px, 4vw, 56px); }
@media (max-width: 860px) { .two-col { grid-template-columns: 1fr; } }

.highlights { display: grid; gap: 14px; list-style: none; padding: 0; margin: 0; }
.highlights li {
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px 18px; color: var(--text-muted);
}
.highlights strong { display: block; color: var(--text); }

/* ---------- Experience ---------- */
.company { margin-bottom: clamp(36px, 5vw, 56px); }
.company:last-child { margin-bottom: 0; }
.company-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 14px; margin-bottom: 16px; }
.company-head h3 { font-size: 1.45rem; margin: 0; }
.company-head p { margin: 0; color: var(--text-muted); }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 18px; }
.card {
  display: flex; flex-direction: column;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px; box-shadow: var(--shadow);
}
.section-alt .card { background: var(--bg); }
.card h3, .card h4 { font-size: 1.1rem; margin: 0 0 6px; }
.card p { color: var(--text-muted); font-size: .98rem; }
.card ul { margin: 0 0 14px; padding-left: 18px; color: var(--text-muted); font-size: .95rem; }
.card li { margin-bottom: 4px; }
.card .note { margin-top: auto; margin-bottom: 0; font-size: .82rem; color: var(--text-muted); }

.tags { display: flex; flex-wrap: wrap; gap: 6px; list-style: none; padding: 0; margin: 0 0 14px; }
.tags li {
  font-size: .78rem; font-weight: 700; padding: 3px 10px; border-radius: 999px;
  background: var(--accent-soft); color: var(--accent-strong);
}

/* ---------- Projects ---------- */
.project {
  display: grid; grid-template-columns: 240px 1fr; gap: clamp(20px, 4vw, 44px); align-items: start;
  background: var(--surface); border: 1px solid var(--border); border-radius: 20px;
  padding: clamp(20px, 3vw, 32px); box-shadow: var(--shadow); margin-bottom: 24px;
}
.project:last-child { margin-bottom: 0; }
.project-media img {
  width: 100%; aspect-ratio: 9 / 16; object-fit: cover; object-position: top;
  border-radius: 18px; border: 6px solid #1b1f2a; background: #1b1f2a;
}
.project h3 { font-size: 1.6rem; }
.project p { color: var(--text-muted); }
.project ul { padding-left: 18px; color: var(--text-muted); margin: 0 0 20px; }
.project li { margin-bottom: 4px; }
.project .tags { padding-left: 0; }
.project-links { display: flex; flex-wrap: wrap; gap: 10px; }

/* Proyectos web: captura apaisada en lugar de pantalla de teléfono */
.project-wide { grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); }
.project-wide .project-media img {
  aspect-ratio: 16 / 10; border-width: 1px; border-color: var(--border); border-radius: 12px;
}
.subsection-title { margin: clamp(36px, 5vw, 56px) 0 18px; font-size: 1.4rem; }
.card-img {
  width: 100%; aspect-ratio: 16 / 10; object-fit: cover; object-position: top;
  border-radius: 10px; border: 1px solid var(--border); margin-bottom: 14px;
}
.card .project-links { margin-top: auto; }
.more-link { margin: 24px 0 0; font-weight: 600; }

@media (max-width: 860px) {
  .project-wide { grid-template-columns: 1fr; }
}
@media (max-width: 700px) {
  .project { grid-template-columns: 1fr; }
  .project-media { max-width: 200px; }
  .project-wide .project-media { max-width: none; }
}

/* ---------- Stack ---------- */
.stack { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 18px; }
.stack-group { background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.stack-group h3 { font-size: 1rem; text-transform: uppercase; letter-spacing: .06em; color: var(--text-muted); }
.stack-group ul { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; padding: 0; margin: 0; }
.stack-group li {
  font-weight: 700; font-size: .92rem; padding: 6px 12px; border-radius: var(--radius-sm);
  background: var(--surface); border: 1px solid var(--border);
}

/* ---------- Certificates ---------- */
.certs { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; margin: 0 0 28px; }
.cert {
  margin: 0; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow); display: flex; flex-direction: column;
}
.cert img { width: 100%; aspect-ratio: 4 / 3; object-fit: contain; background: #fff; padding: 8px; }
.cert figcaption { padding: 14px 16px 16px; border-top: 1px solid var(--border); }
.cert strong { display: block; line-height: 1.3; }
.cert span { font-size: .88rem; color: var(--text-muted); }

/* ---------- Contact ---------- */
.contact {
  text-align: center; background: var(--surface); border: 1px solid var(--border);
  border-radius: 24px; padding: clamp(32px, 6vw, 64px) var(--gutter); box-shadow: var(--shadow);
}
.contact p { color: var(--text-muted); max-width: 56ch; margin-inline: auto; font-size: 1.1rem; }
.contact .hero-actions { justify-content: center; margin-bottom: 0; }

/* ---------- Footer ---------- */
.site-footer { padding: 32px 0 48px; color: var(--text-muted); font-size: .92rem; }
.site-footer .container { display: flex; flex-wrap: wrap; gap: 12px 24px; justify-content: space-between; align-items: center; }
.site-footer ul { display: flex; flex-wrap: wrap; gap: 16px; list-style: none; margin: 0; padding: 0; }
.site-footer a { color: var(--text-muted); }
.site-footer a:hover { color: var(--text); }
.site-footer p { margin: 0; }

/* ---------- Landing pages ---------- */
.breadcrumbs { font-size: .9rem; color: var(--text-muted); margin-bottom: 18px; }
.breadcrumbs ol { display: flex; flex-wrap: wrap; gap: 6px; list-style: none; padding: 0; margin: 0; }
.breadcrumbs li + li::before { content: "/"; margin-right: 6px; opacity: .6; }
.faq details {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px 20px; margin-bottom: 12px;
}
.faq summary { font-weight: 700; cursor: pointer; }
.faq details p { margin: 12px 0 0; color: var(--text-muted); }

/* ---------- Easter egg: modo 8-bit (clic 5 veces en el logo) ---------- */
.mode-8bit h1, .mode-8bit h2, .mode-8bit h3, .mode-8bit .btn {
  font-family: var(--font-pixel); letter-spacing: 0; line-height: 1.5;
}
.mode-8bit h1 { font-size: clamp(1.3rem, 3.4vw, 2.1rem); }
.mode-8bit h2 { font-size: clamp(1.1rem, 2.4vw, 1.5rem); }
.mode-8bit h3 { font-size: .95rem; }
.mode-8bit .btn { font-size: .7rem; border-radius: 0; box-shadow: 4px 4px 0 var(--text); }
.mode-8bit .card, .mode-8bit .project, .mode-8bit .cert, .mode-8bit .contact { border-radius: 0; border-width: 3px; }
.toast {
  position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%); z-index: 99;
  font-family: var(--font-pixel); font-size: .65rem; line-height: 1.8;
  background: #000; color: #fff; padding: 12px 16px; border: 3px solid var(--pixel-gold);
  max-width: calc(100% - 32px); text-align: center;
}