/* ==========================================================
   Tokens — handoff §7 + DESIGN.md (sistema Spotify académico)
   ========================================================== */
:root {
  --bg: #121212;
  --bg-alt: #181818;
  --black: #000000;
  --green: #1DB954;
  --green-hover: #1ED760;
  --text: #FFFFFF;
  --text-2: #B3B3B3;
  --pill: 999px;
  --font: 'Montserrat', Arial, 'Helvetica Neue', sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-weight: 400;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.container {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

h1 {
  font-size: clamp(2rem, 8vw, 3.4rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.5rem, 5.5vw, 2.2rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.section__text {
  color: var(--text-2);
  font-size: 1.05rem;
  max-width: 34em;
  margin-top: 14px;
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ============ Botones (pill) ============ */
.btn {
  display: inline-block;
  font-family: var(--font);
  font-weight: 700;
  font-size: 1rem;
  border: 0;
  border-radius: var(--pill);
  padding: 14px 28px;
  cursor: pointer;
  text-decoration: none;
  text-align: center;
  transition: background-color .15s ease, transform .15s ease, border-color .15s ease;
}

.btn--primary {
  background: var(--green);
  color: var(--black);
}
.btn--primary:hover { background: var(--green-hover); }
.btn--primary:active { transform: scale(.98); }
.btn--primary:disabled { opacity: .6; cursor: default; }

.btn--secondary {
  background: transparent;
  color: var(--text);
  border: 1.5px solid var(--text-2);
}
.btn--secondary:hover { border-color: var(--text); }

.btn:focus-visible,
input:focus-visible {
  outline: 3px solid var(--green-hover);
  outline-offset: 2px;
}

/* ==========================================================
   4.1 Hero — la pieza de campaña completa es la primera pantalla.
   El botón "Quiero entrar" incrustado en la imagen se vuelve
   clicable con un área superpuesta (coordenadas medidas en %
   sobre cada pieza) y abre el modal de registro.
   ========================================================== */
.hero {
  background: var(--black);
  display: flex;
  justify-content: center;
  overflow: hidden;
}

.hero__frame {
  position: relative;
}

/* Móvil/tablet <768px: la pieza 9:16 se muestra a ancho completo
   (sin franjas negras); la altura del hero la define la imagen. */
.hero__frame img {
  display: block;
  width: 100vw;
  height: auto;
}

/* Pieza vertical 9:16 v3 (móvil/tablet <768px): botón incrustado en x 22.5–76.5%, y 87.3–94.4% */
.hero__cta {
  position: absolute;
  left: 21.8%;
  top: 86.8%;
  width: 55.4%;
  height: 8%;
  background: transparent;
  border: 0;
  border-radius: var(--pill);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.hero__cta:hover {
  box-shadow: 0 0 0 3px rgba(30, 215, 96, .55);
}

/* ============ Formulario de registro ============ */
.signup { max-width: 460px; }

.signup__form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.signup__form input[type="email"] {
  font-family: var(--font);
  font-size: 1rem;
  color: var(--text);
  background: rgba(255, 255, 255, .08);
  border: 1.5px solid rgba(255, 255, 255, .25);
  border-radius: var(--pill);
  padding: 14px 22px;
  width: 100%;
}
.signup__form input[type="email"]::placeholder { color: var(--text-2); }
.signup__form input[type="email"]:focus { border-color: var(--green-hover); }
.signup__form input.is-invalid { border-color: #e05c5c; }

.signup__error {
  color: #ff8f8f;
  font-size: .9rem;
  margin-top: 10px;
}

.signup__micro {
  color: var(--text-2);
  font-size: .85rem;
  margin-top: 12px;
}

/* Micro-pregunta de atribución (se inyecta por JS) */
.question__title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.question__options {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.question__option {
  font-family: var(--font);
  font-size: .98rem;
  font-weight: 500;
  color: var(--text);
  background: rgba(255, 255, 255, .07);
  border: 1.5px solid rgba(255, 255, 255, .25);
  border-radius: var(--pill);
  padding: 13px 22px;
  cursor: pointer;
  text-align: left;
  transition: border-color .15s ease, background-color .15s ease;
}
.question__option:hover {
  border-color: var(--green-hover);
  background: rgba(30, 215, 96, .08);
}
.question__option:disabled { opacity: .5; cursor: default; }

.question__skip {
  font-family: var(--font);
  background: none;
  border: 0;
  color: var(--text-2);
  font-size: .85rem;
  margin-top: 14px;
  cursor: pointer;
  text-decoration: underline;
  padding: 4px;
}
.question__skip:hover { color: var(--text); }

.thanks {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  border-left: 4px solid var(--green);
  padding-left: 16px;
}

.fade-in { animation: fadein .45s ease both; }

@keyframes fadein {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: none; }
}

/* ============ 4.2 Performance ============ */
.performance {
  background: var(--bg);
  padding: 64px 0;
}

.cards {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 32px;
}

.card {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--bg-alt);
  border-radius: 12px;
  padding: 14px;
}

.card__cover {
  flex: 0 0 56px;
  height: 56px;
  border-radius: 8px;
}
.card__cover--amber { background: radial-gradient(circle at 35% 35%, #c98a2e, #3a2408 75%); }
.card__cover--green { background: radial-gradient(circle at 35% 35%, #1DB954, #072d14 75%); }
.card__cover--teal  { background: radial-gradient(circle at 35% 35%, #2ea08a, #06231d 75%); }

.card__meta {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
  flex: 1;
}

.card__tag {
  color: var(--green-hover);
  font-size: .7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
}

.card__title {
  font-weight: 700;
  font-size: .98rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.card__artist {
  color: var(--text-2);
  font-size: .85rem;
}

.card__bar {
  margin-top: 7px;
  height: 3px;
  border-radius: 2px;
  background: rgba(255, 255, 255, .15);
  overflow: hidden;
  display: block;
}
.card__bar span {
  display: block;
  height: 100%;
  background: var(--green);
  border-radius: 2px;
}

/* ============ 4.3 Delighter ============ */
.delighter {
  background: var(--bg-alt);
  padding: 64px 0;
}
.delighter .btn { margin-top: 28px; }

/* ============ 4.4 CTA de cierre ============ */
.cta-final {
  background: var(--bg);
  padding: 64px 0 72px;
}
.cta-final .signup { margin-top: 28px; }

/* ============ 4.5 Footer ============ */
.footer {
  background: var(--black);
  border-top: 1px solid var(--bg-alt);
  padding: 28px 0;
}
.footer p {
  color: var(--text-2);
  font-size: .8rem;
}

/* ==========================================================
   Escritorio / tablet — breakpoint único (handoff §7)
   ========================================================== */
@media (min-width: 768px) {
  /* Escritorio: la pieza 16:9 se centra a pantalla completa */
  .hero {
    min-height: 100svh;
    align-items: center;
  }
  .hero__frame img {
    width: auto;
    max-width: 100vw;
    max-height: 100svh;
  }

  /* Pieza horizontal 16:9 v2 (escritorio): botón incrustado en x 4.8–28.5%, y 81.3–91.3% */
  .hero__cta {
    left: 4.4%;
    top: 80.8%;
    width: 25%;
    height: 11.2%;
  }

  .signup__form {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: stretch;
  }
  .signup__form input[type="email"] { flex: 1 1 220px; }
  .signup__form .btn { white-space: nowrap; }
  .signup { max-width: 560px; }

  .cards {
    flex-direction: row;
  }
  .card {
    flex: 1;
    flex-direction: column;
    align-items: flex-start;
    padding: 20px;
  }
  .card__cover {
    flex: 0 0 auto;
    width: 100%;
    height: 120px;
  }
  .card__meta { width: 100%; }

  .performance, .delighter { padding: 88px 0; }
  .cta-final { padding: 88px 0 96px; }
}

/* ============ Modal de registro ============ */
.modal {
  /* centrado: el reset global (margin: 0) anula el margin auto
     con el que <dialog> se centra por defecto — se restaura aquí */
  margin: auto;
  background: var(--bg-alt);
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: 16px;
  padding: 32px 28px 28px;
  width: min(92vw, 460px);
}

.modal[open] { animation: fadein .25s ease both; }

.modal::backdrop { background: rgba(0, 0, 0, .75); }

.modal__title {
  font-size: 1.35rem;
  line-height: 1.2;
  margin-bottom: 18px;
  padding-right: 28px;
}

.modal__close {
  position: absolute;
  top: 12px;
  right: 12px;
  background: none;
  border: 0;
  color: var(--text-2);
  font-size: 1.7rem;
  line-height: 1;
  padding: 6px 10px;
  cursor: pointer;
  border-radius: 50%;
}
.modal__close:hover { color: var(--text); }

.modal .signup { max-width: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .modal[open], .fade-in { animation: none; }
}