/* HackMex 2026 � Modern styles */

:root {
  --navy-deep: #000820;
  --navy: #181b48;
  --navy-mid: #080830;
  --teal: #00ffc0;
  --teal-mid: #00e3ff;
  --teal-dark: #00a2d6;
  --gold: #c9ca3b;
  --gold-light: #e4e552;
  --text-light: #f0fafa;
  --text-muted: rgba(240, 250, 250, 0.72);
  --glass: rgba(255, 255, 255, 0.06);
  --glass-border: rgba(0, 255, 192, 0.14);
  --card-bg: rgba(255, 255, 255, 0.04);
  --shadow: 0 24px 64px rgba(0, 0, 0, 0.45);
  --radius: 16px;
  --radius-lg: 24px;
  --font: "Inter", system-ui, -apple-system, sans-serif;
  --font-display: "Space Grotesk", var(--font);
  --nav-height: 72px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: var(--font);
  background: var(--navy-deep);
  color: var(--text-light);
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

.container {
  width: min(1140px, 92vw);
  margin-inline: auto;
}

/* ?? Header ?? */

.header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  transition: background var(--transition), backdrop-filter var(--transition), box-shadow var(--transition);
}

.header.scrolled {
  background: rgba(0, 8, 32, 0.88);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--glass-border);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.header__logo img {
  height: 40px;
  width: auto;
}

.nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav__link {
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--text-muted);
  transition: color var(--transition);
  position: relative;
}

.nav__link::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--teal);
  transition: width var(--transition);
}

.nav__link:hover,
.nav__link--active {
  color: var(--text-light);
}

.nav__link:hover::after {
  width: 100%;
}

.nav__link--cta {
  padding: 0.5rem 1.125rem;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--teal-dark), var(--teal));
  color: var(--navy-deep) !important;
  font-weight: 700;
}

.nav__link--cta::after {
  display: none;
}

.nav__link--cta:hover {
  box-shadow: 0 4px 20px rgba(0, 255, 192, 0.35);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-light);
  border-radius: 2px;
  transition: var(--transition);
}

/* ?? Hero ?? */

.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
}

.hero__slides {
  position: absolute;
  inset: 0;
}

.hero__slide {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0;
  transition: opacity 1.2s ease;
}

.hero__slide.active {
  opacity: 1;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(0, 8, 32, 0.65) 0%, rgba(24, 27, 72, 0.82) 50%, rgba(0, 8, 32, 0.95) 100%),
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(0, 255, 192, 0.12), transparent);
}

.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 255, 192, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 255, 192, 0.05) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black, transparent);
}

.hero__content {
  position: relative;
  z-index: 2;
  padding: calc(var(--nav-height) + 2rem) 1.5rem 4rem;
  max-width: 860px;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  border-radius: 999px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  backdrop-filter: blur(8px);
}

.hero__badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--teal);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.85); }
}

.hero__logo {
  max-width: min(420px, 70vw);
  margin: 0 auto 1.5rem;
  filter: drop-shadow(0 8px 32px rgba(0, 255, 192, 0.25));
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.hero__title span {
  background: linear-gradient(135deg, var(--teal) 20%, var(--gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--text-muted);
  margin-bottom: 2.5rem;
}

.hero__sponsors {
  max-width: 560px;
  margin: 0 auto 2rem;
  opacity: 0.9;
}

.hero__actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.hero__scroll {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  animation: bob 2s ease-in-out infinite;
}

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--teal), transparent);
}

@keyframes bob {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* ?? Buttons ?? */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  border-radius: 999px;
  font-size: 0.9375rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}

.btn:hover {
  transform: translateY(-2px);
}

.btn--primary {
  background: linear-gradient(135deg, var(--teal-dark), var(--teal));
  color: var(--navy-deep);
  box-shadow: 0 8px 32px rgba(0, 255, 192, 0.3);
}

.btn--primary:hover {
  box-shadow: 0 12px 40px rgba(0, 255, 192, 0.45);
}

.btn--gold {
  background: linear-gradient(135deg, var(--gold), var(--gold-light));
  color: var(--navy-deep);
  box-shadow: 0 8px 32px rgba(201, 202, 59, 0.3);
}

.btn--outline {
  background: var(--glass);
  color: var(--text-light);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(8px);
}

.btn--outline:hover {
  background: rgba(0, 255, 192, 0.08);
  border-color: rgba(0, 255, 192, 0.3);
}

/* ?? Sections ?? */

.section {
  padding: 6rem 0;
  position: relative;
}

.section--gradient {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-deep) 60%, #0a1030 100%);
}

.section--dark {
  background: var(--navy-mid);
}

.section--light {
  background: #f4f8fa;
  color: #1a1a2e;
}

.section__watermark {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-display);
  font-size: clamp(6rem, 18vw, 14rem);
  font-weight: 800;
  color: transparent;
  -webkit-text-stroke: 1px rgba(0, 255, 192, 0.04);
  pointer-events: none;
  user-select: none;
  white-space: nowrap;
}

.section--light .section__watermark {
  -webkit-text-stroke-color: rgba(24, 27, 72, 0.06);
}

.section__header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section__label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 0.75rem;
}

.section--light .section__label {
  color: var(--teal-dark);
}

.section__title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.section__divider {
  width: 48px;
  height: 3px;
  background: linear-gradient(90deg, var(--teal), var(--gold));
  border-radius: 2px;
  margin: 1.25rem auto 0;
}

/* ?? Countdown / Registration banner ?? */

.countdown-banner {
  text-align: center;
  padding: 4rem 0;
}

.countdown-banner__title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 0.75rem;
}

.countdown-banner__title span {
  color: var(--gold);
}

.countdown-banner__subtitle {
  font-size: clamp(0.9375rem, 2vw, 1.0625rem);
  color: var(--text-muted);
  margin-bottom: 2.5rem;
}

.countdown-banner__subtitle strong {
  color: var(--teal);
}

.countdown {
  display: flex;
  justify-content: center;
  gap: clamp(0.75rem, 3vw, 1.5rem);
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}

.countdown__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: clamp(72px, 18vw, 100px);
  padding: 1.25rem 1rem;
  border-radius: var(--radius);
  background: var(--glass);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(12px);
}

.countdown__value {
  font-family: var(--font-display);
  font-size: clamp(2rem, 6vw, 3rem);
  font-weight: 700;
  line-height: 1;
  color: var(--teal);
  font-variant-numeric: tabular-nums;
}

.countdown__label {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-top: 0.5rem;
}

.countdown-banner__dates {
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.countdown-banner__date-item {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
}

.countdown-banner__date-item i {
  color: var(--gold);
  font-size: 1rem;
}

.countdown-banner__date-item strong {
  color: var(--text-light);
}

.countdown-banner.is-open .countdown {
  display: none;
}

.countdown-banner__open-msg {
  display: none;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  font-weight: 700;
  color: var(--teal);
  margin-bottom: 2rem;
}

.countdown-banner.is-open .countdown-banner__open-msg {
  display: block;
}

/* ?? About ?? */

.about {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about__text h2 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1.25rem;
}

.about__text p {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.about__text strong {
  color: var(--text-light);
}

.about__highlight {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--gold);
  margin-bottom: 1.5rem;
}

.about__dates {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.about__date-row {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.9375rem;
  color: var(--text-muted);
}

.about__date-row i {
  color: var(--teal);
  margin-top: 0.2rem;
}

.about__date-row strong {
  color: var(--text-light);
}

.about__images {
  position: relative;
  display: grid;
  gap: 1rem;
}

.about__images img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.about__images img:first-child {
  grid-column: 1;
  grid-row: 1 / 3;
  align-self: center;
  max-width: 55%;
  z-index: 2;
  border: 3px solid rgba(0, 255, 192, 0.25);
}

.about__images img:last-child {
  grid-column: 1 / -1;
  width: 100%;
}

/* ?? Cards grid ?? */

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  backdrop-filter: blur(12px);
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 255, 192, 0.35);
  box-shadow: 0 16px 48px rgba(0, 255, 192, 0.1);
}

.card__number {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--gold);
  margin-bottom: 0.75rem;
}

.card__icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--teal-dark), var(--teal));
  color: var(--navy-deep);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.375rem;
  margin-bottom: 1.25rem;
}

.card__title {
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.card__title span {
  color: var(--teal);
}

.card__text {
  color: var(--text-muted);
  font-size: 0.9375rem;
}

/* ?? Winners ?? */

.winners-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.winner-card {
  background: var(--card-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}

.winner-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.winner-card img {
  width: 100%;
}

/* ?? Sponsors ?? */

.sponsors {
  text-align: center;
}

.sponsors__title {
  color: #2d2d2d;
}

.sponsors__image {
  max-width: 900px;
  margin: 0 auto;
  border-radius: var(--radius);
  transition: opacity var(--transition);
}

.sponsors__image:hover {
  opacity: 0.85;
}

/* ?? Footer ?? */

.footer {
  background: var(--navy-deep);
  border-top: 1px solid var(--glass-border);
  padding: 2.5rem 0;
}

.footer__inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 2rem;
  align-items: center;
}

.footer__logo img {
  height: 36px;
}

.footer__copy {
  text-align: center;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.footer__copy a {
  color: var(--teal);
  transition: opacity var(--transition);
}

.footer__copy a:hover {
  opacity: 0.8;
}

.footer__motto {
  display: block;
  margin-top: 0.25rem;
  font-style: italic;
  color: var(--gold);
  font-size: 0.8125rem;
}

.footer__social {
  display: flex;
  gap: 0.75rem;
}

.footer__social a {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: background var(--transition), transform var(--transition);
}

.footer__social a:hover {
  background: var(--teal);
  color: var(--navy-deep);
  transform: translateY(-2px);
}

.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--teal);
  color: var(--navy-deep);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.125rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity var(--transition), visibility var(--transition), transform var(--transition), box-shadow var(--transition);
  z-index: 90;
  box-shadow: 0 4px 20px rgba(0, 255, 192, 0.35);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  box-shadow: 0 8px 28px rgba(0, 255, 192, 0.5);
}

/* ?? Animations ?? */

.fade-up {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-up:nth-child(2) { transition-delay: 0.1s; }
.fade-up:nth-child(3) { transition-delay: 0.2s; }
.fade-up:nth-child(4) { transition-delay: 0.3s; }

/* ?? Responsive ?? */

@media (max-width: 900px) {
  .about {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .about__images {
    order: -1;
  }

  .about__images img:first-child {
    max-width: 45%;
  }

  .footer__inner {
    grid-template-columns: 1fr;
    text-align: center;
    justify-items: center;
  }

  .countdown-banner__dates {
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
  }
}

@media (max-width: 768px) {
  .menu-toggle {
    display: flex;
  }

  .nav {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: rgba(0, 8, 32, 0.96);
    backdrop-filter: blur(20px);
    padding: 1rem 0;
    border-bottom: 1px solid var(--glass-border);
    transform: translateY(-120%);
    opacity: 0;
    transition: transform var(--transition), opacity var(--transition);
    pointer-events: none;
  }

  .nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav__link {
    display: block;
    padding: 1rem 2rem;
    font-size: 1rem;
  }

  .nav__link::after {
    display: none;
  }

  .section {
    padding: 4rem 0;
  }

  .hero__scroll {
    display: none;
  }
}