/* ==========================================================================
   Sergio Lara González — Web personal
   ========================================================================== */

:root {
  --bg: #070b16;
  --bg-2: #0b1120;
  --surface: rgba(18, 27, 46, 0.72);
  --surface-solid: #111a2e;
  --border: rgba(148, 178, 255, 0.14);
  --border-strong: rgba(148, 178, 255, 0.28);
  --text: #e9effc;
  --text-soft: #b9c6e2;
  --muted: #8293b3;
  --accent: #38bdf8;
  --accent-2: #818cf8;
  --accent-contrast: #06121f;
  --shadow: 0 24px 60px -30px rgba(0, 0, 0, 0.85);
  --radius: 18px;
  --radius-sm: 12px;
  --maxw: 1140px;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-head: "Space Grotesk", "Inter", system-ui, sans-serif;
}

html[data-theme="light"] {
  --bg: #f4f7fd;
  --bg-2: #ffffff;
  --surface: rgba(255, 255, 255, 0.85);
  --surface-solid: #ffffff;
  --border: rgba(19, 40, 82, 0.1);
  --border-strong: rgba(19, 40, 82, 0.2);
  --text: #0e1729;
  --text-soft: #34435f;
  --muted: #5d6b88;
  --accent: #0ea5e9;
  --accent-2: #4f46e5;
  --accent-contrast: #ffffff;
  --shadow: 0 24px 50px -28px rgba(20, 40, 80, 0.35);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 90px; }

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

h1, h2, h3 { font-family: var(--font-head); line-height: 1.15; margin: 0; letter-spacing: -0.02em; }
p { margin: 0; }
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
ul, ol { margin: 0; padding: 0; list-style: none; }

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

.gradient-text {
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 200;
  background: var(--accent); color: var(--accent-contrast);
  padding: 10px 16px; border-radius: 0 0 10px 0; font-weight: 600;
}
.skip-link:focus { left: 0; }

/* ---------- Fondo decorativo ---------- */
.bg-grid, .bg-glow { position: fixed; inset: 0; z-index: -2; pointer-events: none; }
.bg-grid {
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 20%, transparent 75%);
  opacity: 0.6;
}
.bg-glow { z-index: -1; overflow: hidden; }
.bg-glow::before, .bg-glow::after {
  content: ""; position: absolute; border-radius: 50%; filter: blur(90px); opacity: 0.35;
}
.bg-glow::before { width: 620px; height: 620px; background: var(--accent); top: -240px; right: -160px; }
.bg-glow::after { width: 520px; height: 520px; background: var(--accent-2); top: 320px; left: -200px; opacity: 0.22; }

/* ---------- Botones ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 9px;
  font-weight: 600; font-size: 0.95rem;
  padding: 12px 22px; border-radius: 999px;
  border: 1px solid transparent; cursor: pointer;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease, color .18s ease;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  color: var(--accent-contrast);
  box-shadow: 0 14px 30px -14px color-mix(in srgb, var(--accent) 70%, transparent);
}
.btn-primary:hover { box-shadow: 0 18px 40px -14px color-mix(in srgb, var(--accent) 85%, transparent); }
.btn-ghost { background: var(--surface); border-color: var(--border-strong); color: var(--text); backdrop-filter: blur(8px); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn-sm { padding: 9px 16px; font-size: 0.88rem; }
.btn-lg { padding: 15px 30px; font-size: 1.02rem; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  transition: background .3s ease, border-color .3s ease, backdrop-filter .3s ease;
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  background: color-mix(in srgb, var(--bg-2) 82%, transparent);
  backdrop-filter: blur(14px);
  border-bottom-color: var(--border);
}
.nav-wrap { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: 16px; }

.brand { display: flex; align-items: center; gap: 10px; font-family: var(--font-head); font-weight: 700; font-size: 1.05rem; }
.brand-mark { display: grid; place-items: center; filter: drop-shadow(0 6px 14px color-mix(in srgb, var(--accent) 45%, transparent)); }
.brand .dot { color: var(--accent); }

.nav { display: flex; align-items: center; gap: 26px; }
.nav > ul { display: flex; gap: 26px; }
.nav > ul a {
  font-size: 0.93rem; font-weight: 500; color: var(--text-soft);
  position: relative; padding: 6px 0; transition: color .2s ease;
}
.nav > ul a::after {
  content: ""; position: absolute; left: 0; bottom: 0; height: 2px; width: 0;
  background: linear-gradient(90deg, var(--accent), var(--accent-2)); transition: width .25s ease;
}
.nav > ul a:hover, .nav > ul a.active { color: var(--text); }
.nav > ul a:hover::after, .nav > ul a.active::after { width: 100%; }
.nav-actions { display: flex; align-items: center; }

.header-tools { display: flex; align-items: center; gap: 8px; }
.icon-btn {
  display: grid; place-items: center; width: 42px; height: 42px;
  border-radius: 12px; border: 1px solid var(--border-strong);
  background: var(--surface); color: var(--text); cursor: pointer; backdrop-filter: blur(8px);
  transition: border-color .2s ease, color .2s ease, transform .2s ease;
}
.icon-btn:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }
.menu-btn { display: none; }

html[data-theme="dark"] .icon-sun { display: none; }
html[data-theme="light"] .icon-moon { display: none; }

/* ---------- Hero ---------- */
.hero { position: relative; padding: 84px 0 96px; }
.hero-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 48px; align-items: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 9px;
  font-size: 0.85rem; font-weight: 600; color: var(--text-soft);
  background: var(--surface); border: 1px solid var(--border-strong);
  padding: 7px 15px; border-radius: 999px; margin-bottom: 24px; backdrop-filter: blur(8px);
}
.pulse { width: 8px; height: 8px; border-radius: 50%; background: #22c55e; box-shadow: 0 0 0 4px rgba(34,197,94,.18); animation: pulse 2s infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .45; } }

.hero h1 { font-size: clamp(2.3rem, 5.4vw, 3.8rem); font-weight: 700; margin-bottom: 14px; }
.hero-role { font-size: 1.05rem; color: var(--text-soft); font-weight: 500; margin-bottom: 18px; }
.hero-lead { font-size: 1.06rem; color: var(--muted); max-width: 560px; margin-bottom: 30px; }
.hero-lead strong { color: var(--text-soft); }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 28px; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 22px; color: var(--muted); font-size: 0.92rem; }
.hero-meta li { display: inline-flex; align-items: center; gap: 8px; }
.hero-meta svg { color: var(--accent); flex: none; }

.hero-visual { display: flex; justify-content: center; }
.avatar-card { position: relative; width: min(340px, 80vw); aspect-ratio: 1; }
.logo-frame {
  width: 100%; height: 100%;
  display: grid; place-items: center;
  padding: 40px;
  border-radius: 30px;
  background: linear-gradient(160deg, #ffffff, #eef2fb);
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow);
}
.logo-img { width: 100%; height: auto; object-fit: contain; }
.avatar-ring {
  position: absolute; inset: -14px; border-radius: 40px; z-index: -1;
  background: conic-gradient(from 0deg, var(--accent), var(--accent-2), transparent 70%);
  filter: blur(18px); opacity: 0.55; animation: spin 14s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.float-chip {
  position: absolute; display: inline-flex; align-items: center; gap: 8px;
  background: var(--surface-solid); border: 1px solid var(--border-strong);
  padding: 9px 14px; border-radius: 12px; font-size: 0.85rem; font-weight: 600;
  box-shadow: var(--shadow); backdrop-filter: blur(8px);
}
.chip-1 { top: 14%; right: -6%; animation: floaty 5s ease-in-out infinite; }
.chip-2 { bottom: 12%; left: -8%; animation: floaty 5s ease-in-out infinite .9s; }
@keyframes floaty { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }

.scroll-hint {
  display: flex; align-items: center; gap: 10px; justify-content: center;
  margin-top: 60px; color: var(--muted); font-size: 0.82rem; letter-spacing: .14em; text-transform: uppercase;
}
.scroll-hint span { width: 22px; height: 34px; border: 1.5px solid var(--border-strong); border-radius: 12px; position: relative; }
.scroll-hint span::after { content: ""; position: absolute; top: 6px; left: 50%; transform: translateX(-50%); width: 4px; height: 7px; border-radius: 3px; background: var(--accent); animation: scrolldot 1.6s infinite; }
@keyframes scrolldot { 0% { opacity: 0; top: 6px; } 40% { opacity: 1; } 100% { opacity: 0; top: 20px; } }

/* ---------- Secciones ---------- */
.section { padding: 88px 0; }
.section-head { max-width: 720px; margin-bottom: 48px; }
.section-tag {
  display: inline-block; font-family: var(--font-head); font-size: 0.82rem; font-weight: 600;
  letter-spacing: .16em; text-transform: uppercase; color: var(--accent); margin-bottom: 14px;
}
.section-head h2 { font-size: clamp(1.8rem, 3.6vw, 2.6rem); font-weight: 700; }
.section-sub { color: var(--muted); margin-top: 14px; font-size: 1rem; }

/* ---------- Sobre mí ---------- */
.about-grid { display: grid; grid-template-columns: 1.3fr 0.7fr; gap: 44px; align-items: start; }
.about-text p { color: var(--text-soft); margin-bottom: 18px; font-size: 1.03rem; }
.about-text strong { color: var(--text); }
.about-facts { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.fact-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px 18px; backdrop-filter: blur(8px); transition: transform .2s ease, border-color .2s ease;
}
.fact-card:hover { transform: translateY(-4px); border-color: var(--border-strong); }
.fact-num { display: block; font-family: var(--font-head); font-size: 1.9rem; font-weight: 700; background: linear-gradient(120deg, var(--accent), var(--accent-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.fact-label { display: block; font-size: 0.86rem; color: var(--muted); margin-top: 4px; }

/* ---------- Timeline ---------- */
.timeline { position: relative; padding-left: 34px; }
.timeline::before { content: ""; position: absolute; left: 9px; top: 6px; bottom: 6px; width: 2px; background: linear-gradient(var(--accent), var(--accent-2), transparent); }
.timeline-item { position: relative; padding-bottom: 26px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-dot { position: absolute; left: -34px; top: 6px; width: 20px; height: 20px; border-radius: 50%; background: var(--bg); border: 2px solid var(--accent); box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 18%, transparent); }
.timeline-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px 26px; backdrop-filter: blur(8px); transition: transform .2s ease, border-color .2s ease;
}
.timeline-card:hover { transform: translateX(6px); border-color: var(--border-strong); }
.timeline-top { display: flex; align-items: center; justify-content: space-between; gap: 14px; flex-wrap: wrap; margin-bottom: 6px; }
.timeline-top h3 { font-size: 1.16rem; font-weight: 600; }
.timeline-org { color: var(--text-soft); font-weight: 500; font-size: 0.95rem; }
.timeline-date { color: var(--muted); font-size: 0.86rem; margin: 2px 0 10px; }
.timeline-desc { color: var(--muted); font-size: 0.95rem; }

.badge { font-size: 0.75rem; font-weight: 600; padding: 4px 12px; border-radius: 999px; background: var(--surface-solid); border: 1px solid var(--border-strong); color: var(--text-soft); }
.badge-live { color: #22c55e; border-color: color-mix(in srgb, #22c55e 45%, transparent); background: color-mix(in srgb, #22c55e 12%, transparent); }

/* ---------- Cards / Educación ---------- */
.cards-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 30px; backdrop-filter: blur(8px); transition: transform .2s ease, border-color .2s ease;
}
.card:hover { transform: translateY(-5px); border-color: var(--border-strong); }
.card-icon { font-size: 1.9rem; margin-bottom: 14px; }
.edu-card h3 { font-size: 1.2rem; margin-bottom: 10px; }
.edu-card p { color: var(--muted); font-size: 0.96rem; }

/* ---------- Skills ---------- */
.skills-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.skill-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 26px; backdrop-filter: blur(8px); transition: transform .2s ease, border-color .2s ease;
}
.skill-card:hover { transform: translateY(-5px); border-color: var(--border-strong); }
.skill-head { display: flex; align-items: center; gap: 11px; margin-bottom: 10px; }
.skill-ico { font-size: 1.4rem; }
.skill-head h3 { font-size: 1.02rem; font-weight: 600; }
.skill-card p { color: var(--muted); font-size: 0.92rem; margin-bottom: 16px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chips li {
  font-size: 0.8rem; font-weight: 500; color: var(--text-soft);
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  border: 1px solid var(--border); padding: 5px 11px; border-radius: 999px;
}

/* ---------- Proyectos ---------- */
.projects-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.project-card {
  display: flex; flex-direction: column; gap: 10px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 26px; backdrop-filter: blur(8px); position: relative; overflow: hidden;
  transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease;
}
.project-card::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(140deg, color-mix(in srgb, var(--accent) 14%, transparent), transparent 55%);
  opacity: 0; transition: opacity .25s ease;
}
.project-card:hover { transform: translateY(-6px); border-color: var(--border-strong); box-shadow: var(--shadow); }
.project-card:hover::before { opacity: 1; }
.project-cat {
  align-self: flex-start; font-family: var(--font-head); font-size: 0.72rem; font-weight: 700;
  letter-spacing: .1em; text-transform: uppercase; color: var(--accent);
  border: 1px solid var(--border-strong); border-radius: 999px; padding: 3px 11px; position: relative;
}
.project-card h3 { font-size: 1.12rem; position: relative; }
.project-card p { color: var(--muted); font-size: 0.92rem; flex: 1; position: relative; }
.project-link { font-weight: 600; font-size: 0.9rem; color: var(--accent); position: relative; margin-top: 4px; }
.projects-cta { margin-top: 44px; text-align: center; }

/* ---------- Contacto ---------- */
.contact-box {
  display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center;
  background:
    radial-gradient(circle at 12% 10%, color-mix(in srgb, var(--accent) 16%, transparent), transparent 55%),
    var(--surface);
  border: 1px solid var(--border-strong); border-radius: 26px; padding: 48px;
}
.contact-copy h2 { font-size: clamp(1.8rem, 3.4vw, 2.4rem); margin-bottom: 14px; }
.contact-copy p { color: var(--text-soft); }
.contact-links { display: flex; flex-direction: column; gap: 14px; }
.contact-item {
  display: flex; align-items: center; gap: 16px;
  background: var(--surface-solid); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 16px 20px;
  transition: transform .2s ease, border-color .2s ease;
}
.contact-item:hover { transform: translateX(6px); border-color: var(--accent); }
.contact-ico { display: grid; place-items: center; width: 40px; height: 40px; flex: none; border-radius: 12px; background: color-mix(in srgb, var(--accent) 14%, transparent); color: var(--accent); }
.contact-item strong { display: block; font-size: 0.98rem; }
.contact-item em { display: block; font-style: normal; font-size: 0.86rem; color: var(--muted); }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--border); padding: 32px 0; margin-top: 20px; }
.footer-wrap { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.site-footer p { color: var(--muted); font-size: 0.88rem; }
.footer-nav { display: flex; gap: 22px; }
.footer-nav a { color: var(--text-soft); font-size: 0.9rem; transition: color .2s ease; }
.footer-nav a:hover { color: var(--accent); }

/* ---------- Reveal ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
  .avatar-ring, .float-chip, .pulse, .scroll-hint span::after { animation: none; }
}

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { order: -1; }
  .avatar-card { width: min(280px, 68vw); }
  .about-grid { grid-template-columns: 1fr; }
  .skills-grid, .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-box { grid-template-columns: 1fr; padding: 36px; }
}

@media (max-width: 760px) {
  .nav {
    position: fixed; inset: 72px 0 auto 0; flex-direction: column; align-items: stretch;
    gap: 0; background: color-mix(in srgb, var(--bg-2) 96%, transparent);
    backdrop-filter: blur(16px); border-bottom: 1px solid var(--border);
    padding: 14px 24px 26px; transform: translateY(-120%); transition: transform .3s ease;
    max-height: calc(100vh - 72px); overflow-y: auto;
  }
  .nav.open { transform: translateY(0); }
  .nav > ul { flex-direction: column; gap: 4px; width: 100%; }
  .nav > ul a { display: block; padding: 13px 6px; border-bottom: 1px solid var(--border); font-size: 1rem; }
  .nav > ul a::after { display: none; }
  .nav-actions { margin-top: 16px; }
  .nav-actions .btn { width: 100%; justify-content: center; }
  .menu-btn { display: grid; }
  .section { padding: 66px 0; }
  .skills-grid, .projects-grid, .cards-2 { grid-template-columns: 1fr; }
  .about-facts { grid-template-columns: 1fr 1fr; }
  .contact-box { padding: 28px 22px; }
  .footer-wrap { flex-direction: column; text-align: center; }
}

@media (max-width: 400px) {
  .about-facts { grid-template-columns: 1fr; }
  .hero-cta .btn { width: 100%; justify-content: center; }
}