/* -------------------------------------------------------------
   Hackatón IA UDLA — hackatonia.cl
   Tema: dark AI/tech · cyan + magenta · glassmorphism
   ------------------------------------------------------------- */

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

:root {
  --bg: #050814;
  --bg-soft: #0a1024;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-2: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.16);
  --text: #eef2ff;
  --text-muted: #9aa3b8;
  --text-dim: #6b7391;

  --cyan: #00e5ff;
  --purple: #8b5cf6;
  --magenta: #ec4899;
  --gold: #fbbf24;

  --gradient: linear-gradient(135deg, #00e5ff 0%, #8b5cf6 50%, #ec4899 100%);
  --gradient-soft: linear-gradient(135deg, rgba(0,229,255,0.15), rgba(139,92,246,0.15), rgba(236,72,153,0.15));

  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;

  --container: 1200px;
  --transition: 200ms cubic-bezier(0.4, 0, 0.2, 1);
}

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

/* ----- Animated background ----- */
.bg-grid {
  position: fixed; inset: 0; z-index: -2;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at 50% 0%, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 0%, black 30%, transparent 75%);
}

.bg-glow {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(600px circle at 10% 10%, rgba(0, 229, 255, 0.15), transparent 50%),
    radial-gradient(700px circle at 90% 20%, rgba(139, 92, 246, 0.18), transparent 50%),
    radial-gradient(500px circle at 50% 90%, rgba(236, 72, 153, 0.12), transparent 50%);
  animation: drift 22s ease-in-out infinite alternate;
}

@keyframes drift {
  from { transform: translate3d(0,0,0); }
  to { transform: translate3d(0, -30px, 0); }
}

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

/* ----- Navigation ----- */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(18px) saturate(180%);
  -webkit-backdrop-filter: blur(18px) saturate(180%);
  background: rgba(5, 8, 20, 0.7);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 24px;
}
.brand {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 600;
  font-size: 18px;
  color: var(--text);
}
.brand-mark {
  color: var(--cyan);
  display: inline-flex;
  filter: drop-shadow(0 0 8px rgba(0, 229, 255, 0.5));
}
.brand-text { letter-spacing: -0.01em; }
.brand-ai {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-left: 2px;
}
.nav-links {
  list-style: none;
  display: flex;
  gap: 28px;
  margin: 0 auto;
  padding: 0;
}
.nav-links a {
  color: var(--text-muted);
  font-size: 14px;
  transition: color var(--transition);
}
.nav-links a:hover { color: var(--text); }
.nav-cta {
  padding: 10px 18px;
  background: var(--gradient);
  color: #050814;
  border-radius: 100px;
  font-weight: 600;
  font-size: 14px;
  transition: transform var(--transition), box-shadow var(--transition);
}
.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 30px -10px rgba(0, 229, 255, 0.5);
}
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-inner { justify-content: space-between; }
}

/* ----- Hero ----- */
.hero {
  padding: 80px 24px 100px;
  position: relative;
}
.hero-inner {
  max-width: 980px;
  margin: 0 auto;
  text-align: center;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  margin-bottom: 28px;
}
.pulse {
  width: 8px; height: 8px;
  background: var(--cyan);
  border-radius: 50%;
  box-shadow: 0 0 0 0 rgba(0, 229, 255, 0.7);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(0, 229, 255, 0.7); }
  70% { box-shadow: 0 0 0 10px rgba(0, 229, 255, 0); }
  100% { box-shadow: 0 0 0 0 rgba(0, 229, 255, 0); }
}

.hero-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(40px, 7vw, 88px);
  line-height: 1.05;
  letter-spacing: -0.03em;
  font-weight: 700;
  margin: 0 0 24px;
}
.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  background-size: 200% 200%;
  animation: shift 8s ease infinite;
}
@keyframes shift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.hero-lead {
  font-size: clamp(16px, 1.5vw, 20px);
  color: var(--text-muted);
  max-width: 720px;
  margin: 0 auto 48px;
}

.hero-meta {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 40px;
}
@media (max-width: 700px) {
  .hero-meta { grid-template-columns: 1fr; }
}
.meta-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  text-align: left;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: border-color var(--transition), transform var(--transition);
}
.meta-card:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
}
.meta-label {
  display: block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--text-dim);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 6px;
}
.meta-value {
  display: block;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 20px;
  font-weight: 600;
  color: var(--text);
}
.meta-sub {
  display: block;
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 56px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: 100px;
  font-weight: 600;
  font-size: 15px;
  transition: all var(--transition);
  cursor: pointer;
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--gradient);
  color: #050814;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 40px -12px rgba(139, 92, 246, 0.6);
}
.btn-ghost {
  background: var(--surface);
  border-color: var(--border-strong);
  color: var(--text);
}
.btn-ghost:hover {
  background: var(--surface-2);
  border-color: var(--cyan);
}

/* ----- Countdown ----- */
.countdown {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 18px 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(12px);
}
.cd-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 52px;
}
.cd-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 32px;
  font-weight: 500;
  color: var(--cyan);
  line-height: 1;
}
.cd-label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  margin-top: 6px;
}
.cd-sep {
  color: var(--text-dim);
  font-size: 28px;
  font-family: 'JetBrains Mono', monospace;
  opacity: 0.4;
}

/* ----- Sections ----- */
.section {
  padding: 100px 0;
  position: relative;
}
.section-dark {
  background: linear-gradient(180deg, transparent, rgba(10, 16, 36, 0.6), transparent);
}
.section-form {
  padding-bottom: 120px;
}
.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}
.section-head.align-left {
  text-align: left;
  margin: 0 0 40px;
}
.tag {
  display: inline-block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--cyan);
  letter-spacing: 0.08em;
  margin-bottom: 16px;
  text-transform: uppercase;
}
.section-head h2 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(32px, 4vw, 48px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  font-weight: 700;
  margin: 0 0 16px;
}
.section-head p {
  color: var(--text-muted);
  font-size: 17px;
  margin: 0;
}

/* ----- Careers ----- */
.careers {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}
.career {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 18px 20px;
  font-weight: 500;
  color: var(--text);
  transition: all var(--transition);
  position: relative;
}
.career::before {
  content: '';
  position: absolute;
  left: 20px; top: 50%;
  width: 6px; height: 6px;
  transform: translateY(-50%);
  background: var(--cyan);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--cyan);
}
.career { padding-left: 40px; }
.career:hover {
  background: var(--surface-2);
  border-color: var(--border-strong);
}

/* ----- Timeline ----- */
.timeline {
  list-style: none;
  padding: 0;
  margin: 0 auto;
  max-width: 820px;
  display: flex;
  flex-direction: column;
  gap: 32px;
  position: relative;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 11px; top: 12px; bottom: 12px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), var(--purple), var(--magenta));
  opacity: 0.4;
}
.tl-item {
  position: relative;
  padding-left: 48px;
}
.tl-dot {
  position: absolute;
  left: 0; top: 6px;
  width: 24px; height: 24px;
  background: var(--bg);
  border: 2px solid var(--cyan);
  border-radius: 50%;
  box-shadow: 0 0 16px rgba(0, 229, 255, 0.4);
}
.tl-item:nth-child(2) .tl-dot { border-color: var(--purple); box-shadow: 0 0 16px rgba(139, 92, 246, 0.4); }
.tl-item:nth-child(3) .tl-dot { border-color: var(--magenta); box-shadow: 0 0 16px rgba(236, 72, 153, 0.4); }

.tl-date {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  color: var(--cyan);
  margin-bottom: 6px;
}
.tl-item:nth-child(2) .tl-date { color: var(--purple); }
.tl-item:nth-child(3) .tl-date { color: var(--magenta); }
.tl-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 6px;
}
.tl-desc {
  color: var(--text-muted);
  margin: 0;
}

/* ----- Challenges ----- */
.challenges {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}
.ch-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.ch-card::before {
  content: '';
  position: absolute;
  inset: -1px;
  padding: 1px;
  background: var(--gradient);
  border-radius: inherit;
  -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 var(--transition);
}
.ch-card:hover {
  transform: translateY(-4px);
  background: var(--surface-2);
}
.ch-card:hover::before { opacity: 1; }
.ch-icon {
  font-size: 32px;
  margin-bottom: 16px;
}
.ch-card h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 20px;
  font-weight: 600;
  margin: 0 0 8px;
}
.ch-card p {
  color: var(--text-muted);
  font-size: 14px;
  margin: 0;
}

/* ----- Grid 2 ----- */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
}
@media (max-width: 900px) {
  .grid-2 { grid-template-columns: 1fr; gap: 48px; }
}

/* ----- Check list ----- */
.check-list {
  list-style: none;
  padding: 0;
  margin: 0 0 32px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.check-list li {
  padding: 16px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  position: relative;
  padding-left: 52px;
}
.check-list li::before {
  content: '✓';
  position: absolute;
  left: 18px; top: 50%;
  transform: translateY(-50%);
  width: 22px; height: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient);
  color: #050814;
  border-radius: 50%;
  font-size: 13px;
  font-weight: 700;
}

.callout {
  padding: 20px 24px;
  background: var(--gradient-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--text-muted);
}
.callout strong { color: var(--text); }

/* ----- Criteria bars ----- */
.criteria {
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.cr-head {
  display: flex;
  justify-content: space-between;
  margin-bottom: 8px;
  font-size: 14px;
}
.cr-head span:last-child {
  font-family: 'JetBrains Mono', monospace;
  color: var(--cyan);
}
.cr-bar {
  height: 6px;
  background: var(--surface-2);
  border-radius: 100px;
  overflow: hidden;
}
.cr-bar > div {
  height: 100%;
  background: var(--gradient);
  border-radius: 100px;
  animation: fillBar 1.2s cubic-bezier(0.4, 0, 0.2, 1) forwards;
  transform-origin: left;
}
@keyframes fillBar {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}

/* ----- Prizes ----- */
.prizes {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  max-width: 820px;
  margin: 0 auto;
}
@media (max-width: 700px) {
  .prizes { grid-template-columns: 1fr; }
}
.prize {
  padding: 36px 32px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--surface);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.prize::after {
  content: '';
  position: absolute;
  top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: conic-gradient(from 0deg, transparent, rgba(251, 191, 36, 0.12), transparent);
  animation: rotate 8s linear infinite;
  z-index: 0;
}
.prize-silver::after {
  background: conic-gradient(from 0deg, transparent, rgba(203, 213, 225, 0.12), transparent);
}
@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}
.prize > * { position: relative; z-index: 1; }
.prize-rank {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--gold), #fff4c4);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.prize-silver .prize-rank {
  background: linear-gradient(135deg, #e5e7eb, #94a3b8);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.prize-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 15px;
  color: var(--text-muted);
}

.footnote {
  text-align: center;
  max-width: 720px;
  margin: 40px auto 0;
  color: var(--text-dim);
  font-size: 14px;
}

/* ----- Form ----- */
.form-wrap {
  max-width: 820px;
  margin: 0 auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px;
  overflow: hidden;
}
.form-wrap iframe {
  border-radius: var(--radius);
  background: #fff;
  min-height: 1200px;
}
.form-fallback {
  text-align: center;
  color: var(--text-muted);
  font-size: 14px;
  margin: 20px 0 4px;
}
.form-fallback a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ----- Footer ----- */
.footer {
  padding: 80px 0 0;
  border-top: 1px solid var(--border);
  background: rgba(5, 8, 20, 0.6);
}
.footer-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}
@media (max-width: 700px) {
  .footer-inner { grid-template-columns: 1fr; }
}
.footer .brand { margin-bottom: 12px; }
.footer p { margin: 4px 0; }
.muted { color: var(--text-dim); font-size: 14px; }
.footer-meta { text-align: right; font-size: 14px; color: var(--text-muted); }
@media (max-width: 700px) {
  .footer-meta { text-align: left; }
}
.footer-meta a { color: var(--cyan); }
.copyright {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  font-size: 13px;
  color: var(--text-dim);
}

/* ----- Motion preferences ----- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}