/* =============================
   RESET & BASE
   ============================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --black:   #0a0a0a;
  --white:   #f5f5f0;
  --accent:  #00e5ff;
  --accent2: #e040fb;
  --accent3: #ff1744;
  --gray:    #888;
  --border:  #e0e0e0;
  --font-display: 'Barlow Condensed', sans-serif;
  --font-body:    'Barlow', sans-serif;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--black);
  color: var(--white);
  overflow-x: hidden;
}

/* =============================
   GRAIN OVERLAY
   ============================= */
.grain {
  position: fixed;
  inset: 0;
  z-index: 999;
  pointer-events: none;
  opacity: .03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  background-size: 180px;
}

/* Grain animado sobre secciones oscuras */
@keyframes grainShift {
  0%   { background-position:   0px   0px; }
  20%  { background-position: -42px  18px; }
  40%  { background-position:  24px -34px; }
  60%  { background-position: -18px  50px; }
  80%  { background-position:  36px -14px; }
  100% { background-position:   0px   0px; }
}

/* =============================
   HERO
   ============================= */
.hero {
  position: relative;
  min-height: 100vh;
  background: #eae6dc;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* Grain sobre el hero */
.hero::before {
  content: '';
  position: absolute;
  inset: -50%;
  z-index: 3;
  pointer-events: none;
  opacity: .18;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 140px;
  animation: grainShift .18s steps(1) infinite;
  mix-blend-mode: multiply;
}

/* Barras de color */
.bars {
  position: absolute;
  inset: 0;
  display: flex;
  gap: 0;
  pointer-events: none;
}

.bars span {
  flex: 1;
  height: var(--h, 100%);
  align-self: flex-start;
  background: linear-gradient(
    to bottom,
    transparent         0%,
    var(--c)           18%,
    var(--c)           54%,
    #000000            100%
  );
  opacity: 0;
  transform: scaleY(0);
  transform-origin: top;
}

/* drop delay + 3.2s = inicio del float */
.bars span:nth-child(1) { --h: 62%;  animation: barDrop 3.2s cubic-bezier(.12,.8,.2,1)  .10s forwards, barFloat 5.0s ease-in-out 3.30s infinite; }
.bars span:nth-child(2) { --h: 80%;  animation: barDrop 3.2s cubic-bezier(.12,.8,.2,1)  .28s forwards, barFloat 6.2s ease-in-out 3.48s infinite; }
.bars span:nth-child(3) { --h: 100%; animation: barDrop 3.2s cubic-bezier(.12,.8,.2,1)  .46s forwards, barFloat 4.8s ease-in-out 3.66s infinite; }
.bars span:nth-child(4) { --h: 96%;  animation: barDrop 3.2s cubic-bezier(.12,.8,.2,1)  .64s forwards, barFloat 7.0s ease-in-out 3.84s infinite; }
.bars span:nth-child(5) { --h: 88%;  animation: barDrop 3.2s cubic-bezier(.12,.8,.2,1)  .82s forwards, barFloat 5.5s ease-in-out 4.02s infinite; }
.bars span:nth-child(6) { --h: 100%; animation: barDrop 3.2s cubic-bezier(.12,.8,.2,1) 1.00s forwards, barFloat 4.2s ease-in-out 4.20s infinite; }
.bars span:nth-child(7) { --h: 72%;  animation: barDrop 3.2s cubic-bezier(.12,.8,.2,1) 1.18s forwards, barFloat 6.8s ease-in-out 4.38s infinite; }
.bars span:nth-child(8) { --h: 85%;  animation: barDrop 3.2s cubic-bezier(.12,.8,.2,1) 1.36s forwards, barFloat 5.2s ease-in-out 4.56s infinite; }
.bars span:nth-child(9) { --h: 48%;  animation: barDrop 3.2s cubic-bezier(.12,.8,.2,1) 1.54s forwards, barFloat 7.4s ease-in-out 4.74s infinite; }

@keyframes barDrop {
  0%   { opacity: 0;    transform: scaleY(0) translateY(0); }
  15%  { opacity: .88; }
  65%  { opacity: .82;  transform: scaleY(1.03) translateY(0); }
  100% { opacity: .78;  transform: scaleY(1) translateY(0); }
}

@keyframes barFloat {
  0%   { transform: scaleY(1) translateY(0);    opacity: .78; }
  35%  { transform: scaleY(1) translateY(-28px); opacity: .85; }
  65%  { transform: scaleY(1) translateY(14px);  opacity: .72; }
  100% { transform: scaleY(1) translateY(0);    opacity: .78; }
}

/* Hero inner */
.hero__inner {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 100vh;
  padding: 3rem 4rem;
  gap: 2rem;
}

/* ---- Branding ---- */
.brand {
  display: inline-flex;
  align-items: flex-start;
  gap: 1rem;
}

.brand__year {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.6rem;
  line-height: 1;
  color: var(--black);
  letter-spacing: -.02em;
}

.brand__divider {
  width: 2px;
  height: 3rem;
  background: var(--black);
  margin-top: .1rem;
}

.brand__text strong {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1rem;
  line-height: 1.1;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--black);
}

.brand__text small {
  display: block;
  font-size: .65rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: rgba(10,10,10,.5);
  margin-top: .3rem;
}

.brand__text small em { font-style: normal; font-weight: 600; color: rgba(10,10,10,.8); }

.brand__logo {
  height: 52px;
  width: auto;
  margin-left: 1.5rem;
  align-self: center;
  opacity: .9;
}

/* ---- Headline ---- */
.hero__sub {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.1rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: rgba(10,10,10,.45);
  margin-bottom: .5rem;
}

.hero__headline h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(6rem, 16vw, 14rem);
  line-height: .9;
  letter-spacing: -.03em;
  text-transform: uppercase;
  color: var(--black);
}

.outline {
  -webkit-text-stroke: 3px var(--black);
  color: transparent;
}

/* ---- Event info ---- */
.event-info {
  display: flex;
  align-items: stretch;
  gap: 0;
  border: 1px solid rgba(10,10,10,.14);
  border-top-color: rgba(255,255,255,.55);
  border-left-color: rgba(255,255,255,.45);
  border-radius: .65rem;
  overflow: hidden;
  backdrop-filter: blur(28px) saturate(140%);
  -webkit-backdrop-filter: blur(28px) saturate(140%);
  background: linear-gradient(
    135deg,
    rgba(255,255,255,.55) 0%,
    rgba(255,255,255,.28) 100%
  );
  box-shadow:
    0 2px 0 0 rgba(255,255,255,.7) inset,
    0 -1px 0 0 rgba(0,0,0,.06) inset,
    0 12px 40px rgba(0,0,0,.12),
    0 3px 8px rgba(0,0,0,.08);
  max-width: 680px;
}

.event-info__item {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: .25rem;
  padding: 1.5rem 2rem;
}

.event-info__sep {
  width: 1px;
  background: rgba(10,10,10,.1);
}

.event-info__label {
  font-size: .7rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: rgba(10,10,10,.45);
  font-weight: 600;
}

.event-info__value {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.4rem;
  line-height: 1.1;
  color: var(--black);
}

.event-info__value em {
  font-style: normal;
  color: #0077cc;
  font-size: 1rem;
  font-weight: 600;
}

/* Scroll cue */
.hero__inner::after {
  content: '↓ REGISTRO';
  position: absolute;
  bottom: 3rem;
  right: 4rem;
  font-family: var(--font-display);
  font-size: .75rem;
  letter-spacing: .14em;
  color: rgba(10,10,10,.28);
  writing-mode: vertical-rl;
}

/* =============================
   REGISTRO
   ============================= */
.registro {
  background: var(--white);
  color: var(--black);
  position: relative;
  z-index: 3;
}

/* Borde superior multicolor */
.registro::before {
  content: '';
  display: block;
  height: 5px;
  background: linear-gradient(90deg,
    #e040fb, #ffeb3b, #00e5ff, #ff1744,
    #00e676, #651fff, #ff6d00, #00b0ff, #f50057
  );
}

.registro__inner {
  max-width: 900px;
  margin: 0 auto;
  padding: 5rem 2rem 6rem;
}

.registro__header {
  margin-bottom: 3.5rem;
}

.registro__eyebrow {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: .8rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--accent3);
  margin-bottom: .75rem;
}

.registro__header h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(4rem, 10vw, 8rem);
  line-height: .9;
  text-transform: uppercase;
  color: var(--black);
  margin-bottom: 1.5rem;
}

.outline-dark {
  -webkit-text-stroke: 3px var(--black);
  color: transparent;
}

.registro__desc {
  max-width: 520px;
  color: #555;
  font-size: 1rem;
  line-height: 1.65;
}

/* =============================
   FORM
   ============================= */
.form { display: flex; flex-direction: column; gap: 1.5rem; }

.form__row { display: grid; gap: 1.25rem; }
.form__row--2 { grid-template-columns: 1fr 1fr; }
.form__row--3 { grid-template-columns: 1fr 1fr 1fr; }

.form__group { display: flex; flex-direction: column; gap: .45rem; }

.form__group label {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: .85rem;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--black);
}

.req { color: var(--accent3); }

.form__group input,
.form__group select {
  width: 100%;
  padding: .85rem 1rem;
  border: 2px solid var(--border);
  border-radius: .35rem;
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--black);
  background: #fff;
  transition: border-color .2s, box-shadow .2s;
  appearance: none;
}

.form__group input:focus,
.form__group select:focus {
  outline: none;
  border-color: var(--black);
  box-shadow: 0 0 0 3px rgba(10,10,10,.08);
}

.form__group input.is-error,
.form__group select.is-error { border-color: var(--accent3); }

.form__error {
  font-size: .78rem;
  color: var(--accent3);
  min-height: 1em;
}

/* Select wrapper con flecha custom */
.select-wrapper { position: relative; }
.select-wrapper::after {
  content: '▾';
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
  font-size: .85rem;
  color: var(--gray);
}

/* Conditional group */
.form__group--conditional {
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transition: max-height .35s ease, opacity .35s ease;
}

.form__group--conditional.visible {
  max-height: 120px;
  opacity: 1;
}

/* Radio group */
.radio-group { display: flex; gap: 1.5rem; flex-wrap: wrap; }

.radio-label {
  display: flex;
  align-items: center;
  gap: .6rem;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: .95rem;
  font-weight: 500;
  color: var(--black);
  text-transform: none;
  letter-spacing: 0;
}

.radio-label input[type="radio"] { display: none; }

.radio-custom {
  width: 20px;
  height: 20px;
  border: 2px solid var(--black);
  border-radius: 50%;
  flex-shrink: 0;
  position: relative;
  transition: border-color .2s;
}

.radio-label input[type="radio"]:checked + .radio-custom::after {
  content: '';
  position: absolute;
  inset: 3px;
  border-radius: 50%;
  background: var(--black);
}

/* Checkbox */
.check-label {
  display: flex;
  align-items: flex-start;
  gap: .7rem;
  cursor: pointer;
  font-size: .92rem;
  color: #444;
  line-height: 1.5;
  text-transform: none;
  letter-spacing: 0;
  font-family: var(--font-body);
  font-weight: 400;
}

.check-label input[type="checkbox"] { display: none; }

.check-custom {
  width: 20px;
  height: 20px;
  border: 2px solid var(--black);
  border-radius: .25rem;
  flex-shrink: 0;
  margin-top: .15rem;
  position: relative;
  transition: background .15s;
}

.check-label input[type="checkbox"]:checked + .check-custom {
  background: var(--black);
}

.check-label input[type="checkbox"]:checked + .check-custom::after {
  content: '';
  position: absolute;
  left: 4px;
  top: 1px;
  width: 8px;
  height: 13px;
  border: 2.5px solid #fff;
  border-top: none;
  border-left: none;
  transform: rotate(45deg);
}

.link {
  color: var(--black);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* Submit button */
.btn-submit {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 1rem;
  padding: 1.25rem 2rem;
  background: var(--black);
  color: var(--white);
  border: none;
  border-radius: .4rem;
  cursor: pointer;
  transition: background .2s, transform .15s;
  width: 100%;
}

.btn-submit:hover { background: #222; transform: translateY(-2px); }
.btn-submit:active { transform: translateY(0); }

.btn-submit__text {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.3rem;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.btn-submit__arrow {
  font-size: 1.5rem;
  transition: transform .2s;
}

.btn-submit:hover .btn-submit__arrow { transform: translateX(4px); }

/* =============================
   FOOTER
   ============================= */
.footer {
  background: var(--black);
  color: var(--white);
  padding: 2.5rem 4rem;
  position: relative;
  overflow: hidden;
}

.footer::before {
  content: '';
  position: absolute;
  inset: -50%;
  pointer-events: none;
  z-index: 0;
  opacity: .11;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 140px;
  mix-blend-mode: overlay;
}

.footer__inner { position: relative; z-index: 1; }

.footer__inner {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}

.brand--sm .brand__year { font-size: 1.1rem; }
.brand--sm .brand__divider { height: 2rem; }
.brand--sm .brand__text strong { font-size: .8rem; }

.footer__logo {
  height: 48px;
  width: auto;
  opacity: .75;
  filter: brightness(0) invert(1);
}

/* =============================
   MODAL
   ============================= */
.modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s;
}

.modal.open { opacity: 1; pointer-events: all; }

.modal__overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,.7);
  backdrop-filter: blur(3px);
}

.modal__box {
  position: relative;
  z-index: 1;
  background: var(--white);
  color: var(--black);
  border-radius: .75rem;
  padding: 2.5rem;
  max-width: 560px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
}

.modal__close {
  position: absolute;
  top: 1rem;
  right: 1.25rem;
  background: none;
  border: none;
  font-size: 1.8rem;
  cursor: pointer;
  color: var(--gray);
  line-height: 1;
}

.modal__box h3 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.6rem;
  margin-bottom: 1.25rem;
}

.modal__body p {
  font-size: .9rem;
  line-height: 1.7;
  color: #444;
  margin-bottom: .9rem;
}

.modal__body a { color: var(--black); font-weight: 700; }

.btn-modal-accept {
  display: block;
  width: 100%;
  margin-top: 1.5rem;
  padding: .85rem;
  background: var(--black);
  color: var(--white);
  border: none;
  border-radius: .35rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1rem;
  letter-spacing: .08em;
  cursor: pointer;
  text-transform: uppercase;
  transition: background .2s;
}

.btn-modal-accept:hover { background: #333; }

/* =============================
   SUCCESS OVERLAY
   ============================= */
.success-overlay {
  position: fixed;
  inset: 0;
  z-index: 1100;
  background: rgba(0,0,0,.85);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity .4s;
}

.success-overlay.show { opacity: 1; pointer-events: all; }

.success-box {
  background: var(--white);
  color: var(--black);
  border-radius: 1rem;
  padding: 3rem 2.5rem;
  max-width: 480px;
  text-align: center;
}

.success-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--black);
  color: var(--white);
  font-size: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
}

.success-box h3 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 2rem;
  margin-bottom: 1rem;
}

.success-box p {
  font-size: 1rem;
  line-height: 1.6;
  color: #444;
  margin-bottom: .5rem;
}

.success-sub { font-size: .85rem; color: var(--gray); }

/* =============================
   RESPONSIVE
   ============================= */
@media (max-width: 768px) {
  .hero__inner { padding: 2rem 1.5rem 4rem; }
  .hero__inner::after { display: none; }

  .form__row--2,
  .form__row--3 { grid-template-columns: 1fr; }

  .registro__inner { padding: 3rem 1.5rem 4rem; }

  .event-info {
    flex-direction: column;
    max-width: 100%;
  }

  .event-info__sep { width: 100%; height: 1px; }

  .footer { padding: 2rem 1.5rem; }
  .footer__inner { flex-direction: column; align-items: flex-start; gap: 1rem; }
}

@media (max-width: 480px) {
  .radio-group { flex-direction: column; gap: .75rem; }
}