/* === Root Variables === */
:root {
  --bg: #000;
  --text: #fff;
  --muted: #cfd2d8;
  --gold: #FFE055;
  --gold-2: #FFF099;
  --gold-3: #FFF6C8;
  --border: #1a1a1a;
  --radius: 18px;
  --max-width: 1100px;

  /* responsive typography */
  --fs-base: clamp(0.95rem, 0.4vw + 0.85rem, 1rem);
  --fs-lg: clamp(1.4rem, 1.6vw + 1rem, 2rem);
  --fs-xl: clamp(2rem, 2vw + 1rem, 2.6rem);
}

/* === Section === */
.ebook-section {
  background: var(--bg);
  color: var(--text);
  padding-block: clamp(2.5rem, 6vw, 5rem);
  padding-inline: 1rem;
  display: flex;
  justify-content: center;
}

/* === Card === */
.ebook-card {
  position: relative;
  width: min(100%, var(--max-width));
  background: linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.02));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow:
    0 30px 90px -40px rgba(0, 0, 0, .9),
    0 0 0 1px rgba(255, 255, 255, .04) inset;
  isolation: isolate;
}

/* === Ambient Glows === */
.ebo-aurora {
  position: absolute;
  inset: -25% -15%;
  filter: blur(80px) saturate(140%);
  opacity: .22;
  pointer-events: none;
  z-index: 0;
}

.ebo-aurora--tl {
  background:
    radial-gradient(35% 35% at 25% 20%, color-mix(in oklab, var(--gold) 25%, transparent) 0%, transparent 70%),
    radial-gradient(30% 30% at 60% 15%, color-mix(in oklab, var(--gold-2) 18%, transparent) 0%, transparent 70%);
  animation: auroraMove 14s ease-in-out infinite alternate;
}

.ebo-aurora--br {
  background:
    radial-gradient(40% 40% at 75% 80%, color-mix(in oklab, var(--gold) 18%, transparent) 0%, transparent 75%),
    radial-gradient(35% 35% at 20% 85%, color-mix(in oklab, var(--gold-2) 14%, transparent) 0%, transparent 70%);
  animation: auroraMove 16s ease-in-out infinite alternate-reverse;
}

@keyframes auroraMove {
  from { transform: scale(1); }
  to { transform: scale(1.05) translateY(-2%); }
}

/* === Layout Grid === */
.ebook-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(1rem, 3vw, 3rem);
  padding: clamp(1.5rem, 2.6vw, 2rem);
  align-items: center;
}

@media (max-width: 900px) {
  .ebook-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

/* === Mock Cover === */
.ebook-mock {
  margin: 0;
  text-align: center;
}

.mock-frame {
  position: relative;
  width: min(420px, 86vw);
  aspect-ratio: 3/4;
  border-radius: 16px;
  background: #0b0b0b;
  border: 1px solid var(--border);
  overflow: hidden;
  box-shadow:
    0 20px 50px -18px rgba(0, 0, 0, .8),
    0 0 0 1px rgba(255, 255, 255, .05) inset;
  transition: transform .4s cubic-bezier(.3, .7, .4, 1);
}

.mock-frame:hover {
  transform: translateY(-4px) scale(1.02);
}

.mock-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: saturate(1.1) contrast(1.05);
}

.mock-shine {
  position: absolute;
  inset: -30% -60%;
  background: linear-gradient(120deg, transparent 46%, rgba(255, 255, 255, .5) 50%, transparent 54%);
  animation: shineSlide 7s ease-in-out infinite;
  mix-blend-mode: screen;
}

@keyframes shineSlide {
  10% { transform: translateX(-120%); opacity: 0; }
  25% { transform: translateX(120%); opacity: .7; }
  100% { transform: translateX(120%); opacity: 0; }
}

.mock-shadow {
  position: absolute;
  left: 8%;
  right: 8%;
  bottom: -8%;
  height: 10%;
  border-radius: 50%;
  background: radial-gradient(60% 140% at 50% -40%, rgba(0, 0, 0, .6), transparent 70%);
  filter: blur(8px);
}

/* === Copy Area === */
.ebook-copy {
  max-width: 560px;
  margin-inline: auto;
}

.eyebrow {
  display: inline-block;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  font-size: .8rem;
  padding: .4rem .7rem;
  border-radius: .6rem;
  color: #111;
  background: linear-gradient(135deg, var(--gold), var(--gold-2));
  box-shadow: 0 10px 28px -16px rgba(255, 224, 85, .55);
  overflow: hidden;
  position: relative;
}

.eyebrow::after {
  content: "";
  position: absolute;
  inset: -40% -60%;
  background: linear-gradient(120deg, transparent 40%, rgba(255,255,255,.6) 52%, transparent 64%);
  animation: eyebrowShine 6s ease-in-out infinite;
  mix-blend-mode: screen;
}

@keyframes eyebrowShine {
  15% { transform: translateX(120%); }
  100% { transform: translateX(120%); }
}

.ebook-title {
  margin: .7rem 0 .5rem;
  font-size: var(--fs-xl);
  font-weight: 800;
  letter-spacing: -.01em;
}

.ebook-sub {
  color: var(--muted);
  font-size: var(--fs-base);
  line-height: 1.6;
  max-width: 60ch;
  margin-block-end: 1rem;
}

/* === Form === */
.ebook-form {
  display: flex;
  flex-wrap: wrap;
  gap: .8rem;
  align-items: stretch;
  justify-content: start;
  margin-block-start: 1rem;
}

.ebook-field {
  display: flex;
  align-items: center;
  gap: .6rem;
  flex: 1;
  background: linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.02));
  border: 1px solid var(--border);
  border-radius: .9rem;
  padding: .35rem .5rem;
  box-shadow: 0 0 0 1px rgba(255,255,255,.03) inset;
}

.ico-mail {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: .7rem;
  background: linear-gradient(135deg, var(--gold-3), var(--gold));
  color: #111;
  box-shadow:
    0 1px 0 rgba(255,255,255,.35) inset,
    0 0 0 1px rgba(255,224,85,.25) inset;
}

.ebook-form input[type="email"] {
  flex: 1;
  min-height: 48px;
  padding: .9rem 1rem;
  border-radius: .7rem;
  border: none;
  background: transparent;
  color: var(--text);
  font-size: var(--fs-base);
  outline: none;
}

.ebook-form input::placeholder {
  color: #9fa6b0;
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .9rem 1.2rem;
  border-radius: .8rem;
  font-weight: 800;
  letter-spacing: .2px;
  text-decoration: none;
  cursor: pointer;
  transition: all .2s ease;
}

.btn-primary {
  background: linear-gradient(135deg, var(--gold), var(--gold-2));
  color: #111;
  box-shadow: 0 12px 36px -12px rgba(255,224,85,.55);
  border: none;
}

.btn-primary:hover {
  transform: translateY(-2px) scale(1.02);
}

.btn-ghost {
  background: #0e0e0e;
  border: 1px solid #232323;
  color: #fff;
}

.btn-ghost:hover {
  border-color: color-mix(in oklab, var(--gold) 40%, #232323);
  box-shadow: var(--ring);
}

.btn-shine {
  position: relative;
  overflow: hidden;
}

.btn-shine::after {
  content: "";
  position: absolute;
  inset: -30% -60%;
  background: linear-gradient(120deg, transparent 45%, rgba(255,255,255,.65) 52%, transparent 59%);
  transform: translateX(-120%);
  animation: btnShine 6.5s ease-in-out infinite 1.2s;
  mix-blend-mode: screen;
}

@keyframes btnShine {
  25% { transform: translateX(120%); }
  100% { transform: translateX(120%); }
}

/* === Terms & Success === */
.ebook-terms {
  display: block;
  color: #b9bfc9;
  margin-top: .6rem;
  font-size: .85rem;
}

.ebook-terms a {
  color: var(--gold);
  text-decoration: underline dotted rgba(255,255,255,.3);
  text-underline-offset: 3px;
}

.ebook-success {
  margin-top: 1rem;
  background: linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.02));
  border: 1px solid var(--border);
  border-radius: .9rem;
  padding: 1rem;
}

/* === Accessibility Helpers === */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0);
  border: 0;
}

.hidden { display: none; }

/* === Mobile === */
@media (max-width: 720px) {
  .ebook-form {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .ebook-sub {
    max-width: 100%;
  }

  .mock-frame {
    width: 80vw;
  }
}