/* ========================================================================
   UGC NET PAPER ONE — HOMEPAGE COVER REFINEMENT
   Keeps the vintage manuscript identity while tightening hierarchy,
   proportions, spacing, and mobile presentation.
   ======================================================================== */

/* Cover stage */
.book-cover-container {
  min-height: 100svh;
  padding: clamp(1.25rem, 4vw, 3rem) clamp(0.75rem, 3vw, 1.5rem);
  background-color: #160b07;
  background-image:
    radial-gradient(ellipse at 50% 18%, rgba(184, 134, 11, 0.09) 0%, transparent 42%),
    radial-gradient(circle at center, rgba(0, 0, 0, 0.18) 0%, rgba(0, 0, 0, 0.82) 100%),
    repeating-linear-gradient(90deg, rgba(255,255,255,0.018) 0 1px, transparent 1px 120px),
    linear-gradient(90deg, #2b180d 0%, #1b0d07 50%, #2b180d 100%);
}

.book-wrapper-3d {
  width: min(460px, 100%);
}

.book-cover {
  width: 100%;
  min-height: clamp(650px, 88svh, 820px);
  padding: clamp(2.35rem, 5vw, 3.25rem) clamp(2rem, 5vw, 2.75rem) clamp(2rem, 4vw, 2.75rem) clamp(3.25rem, 7vw, 3.6rem);
  border-radius: 3px 10px 10px 3px;
  background:
    radial-gradient(ellipse at 68% 18%, rgba(139, 26, 26, 0.34) 0%, transparent 42%),
    radial-gradient(circle at 50% 45%, #4a0d0d 0%, #310707 48%, #250404 100%);
  border: 1px solid rgba(184, 134, 11, 0.28);
  box-shadow:
    -7px 8px 0 rgba(0, 0, 0, 0.42),
    -18px 24px 48px rgba(0, 0, 0, 0.72),
    inset 0 0 0 1px rgba(255, 255, 255, 0.035),
    inset -8px 0 18px rgba(0, 0, 0, 0.2);
}

.book-cover::after {
  content: "";
  position: absolute;
  inset: 10px 12px 10px 38px;
  border: 1px solid rgba(212, 175, 55, 0.12);
  pointer-events: none;
  z-index: 0;
}

.book-cover > *:not(.book-cover-border):not(.corner-ornament) {
  position: relative;
  z-index: 2;
}

.book-cover-border {
  top: 23px;
  bottom: 23px;
  left: 50px;
  right: 18px;
  border: 1px solid rgba(212, 175, 55, 0.52);
}

.book-cover-border::after {
  top: 5px;
  bottom: 5px;
  left: 5px;
  right: 5px;
  border: 1px solid rgba(212, 175, 55, 0.18);
}

.corner-ornament {
  width: 38px;
  height: 38px;
  border-color: rgba(212, 175, 55, 0.78);
}

.corner-top-left { left: 39px; top: 13px; }
.corner-bottom-left { left: 39px; bottom: 13px; }
.corner-top-right { right: 13px; top: 13px; }
.corner-bottom-right { right: 13px; bottom: 13px; }

.cover-header {
  width: 100%;
  margin-top: 0.15rem;
  margin-bottom: clamp(1rem, 3vw, 1.5rem);
  text-align: center;
}

.cover-badge {
  font-size: clamp(0.68rem, 1.8vw, 0.78rem);
  letter-spacing: clamp(3px, 0.8vw, 4px);
  margin-bottom: 0.55rem;
  text-shadow: 0 1px 8px rgba(212, 175, 55, 0.18);
}

.cover-title {
  display: block;
  width: 100%;
  max-width: 390px;
  margin: 0 auto 0.55rem;
  padding: 0;
  font-size: clamp(2.45rem, 7vw, 3.7rem);
  line-height: 0.99;
  letter-spacing: -0.025em;
  text-align: center;
  overflow-wrap: break-word;
  text-wrap: balance;
  text-shadow:
    0 1px 0 #b8860b,
    0 3px 0 rgba(184, 134, 11, 0.7),
    0 8px 18px rgba(0, 0, 0, 0.75);
}

.cover-subtitle {
  max-width: 340px;
  margin: 0.8rem auto 0;
  font-size: clamp(0.82rem, 2.2vw, 1.02rem);
  line-height: 1.45;
  letter-spacing: 0.7px;
  color: #d2c2ad;
  text-align: center;
}

.cover-crest {
  margin: clamp(0.85rem, 3vw, 1.3rem) 0 clamp(0.75rem, 2vw, 1.1rem);
  text-align: center;
}

.cover-crest svg {
  width: clamp(88px, 24vw, 112px);
  height: auto;
  filter: drop-shadow(0 5px 8px rgba(0,0,0,0.45));
}

.cover-content {
  width: 100%;
  text-align: center;
}

.cover-content > .cover-description {
  max-width: 350px;
  margin: 0 auto;
  color: #d0c0aa;
  font-family: var(--font-serif-body);
  font-size: clamp(0.88rem, 2.3vw, 0.98rem);
  font-style: italic;
  line-height: 1.55;
  text-align: center;
  text-wrap: balance;
}

.cover-btn {
  width: min(100%, 350px);
  justify-content: center;
  margin-top: clamp(1.15rem, 3vw, 1.55rem);
  min-height: 52px;
  padding: 0.85rem 1.8rem;
  border: 1px solid #dfbd43;
  border-right: 2px solid #765808;
  border-bottom: 3px solid #604705;
  border-radius: 3px;
  background: linear-gradient(180deg, #dfbb3d 0%, #c69a1d 54%, #ae8210 100%);
  box-shadow:
    0 5px 13px rgba(0,0,0,0.5),
    inset 0 1px 0 rgba(255,255,255,0.42),
    inset 0 -1px 0 rgba(74, 42, 0, 0.25);
  font-size: clamp(0.88rem, 2.5vw, 1.02rem);
  letter-spacing: clamp(2.4px, 0.7vw, 3px);
}

.cover-btn:hover {
  background: linear-gradient(180deg, #f1d46c 0%, #d4af37 55%, #b98d16 100%);
  box-shadow: 0 8px 20px rgba(212,175,55,0.3), inset 0 1px 0 rgba(255,255,255,0.55);
}

.cover-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(0.7rem, 3vw, 1.5rem);
  width: min(360px, 100%);
  margin: clamp(1.2rem, 3vw, 1.6rem) auto 0;
  padding-top: 1rem;
  border-top: 1px solid rgba(212, 175, 55, 0.22);
}

.cover-stat {
  min-width: 0;
  text-align: center;
}

.cover-stat-value {
  font-family: var(--font-serif-display);
  font-size: clamp(1.35rem, 4vw, 1.55rem);
  line-height: 1;
  color: #d4af37;
  font-weight: 700;
  text-shadow: 0 2px 8px rgba(0,0,0,0.5);
}

.cover-stat-label {
  margin-top: 0.35rem;
  font-family: var(--font-serif-display);
  font-size: clamp(0.62rem, 1.8vw, 0.72rem);
  line-height: 1.2;
  color: #cbbba6;
  text-transform: uppercase;
  letter-spacing: 1.3px;
  text-align: center;
}

.cover-footer {
  width: 100%;
  margin-top: clamp(1.8rem, 4vw, 2.7rem);
  padding-top: 0.8rem;
  border-top: 1px solid rgba(212, 175, 55, 0.12);
  text-align: center;
}

.cover-footer p {
  text-align: center;
}

.cover-author {
  margin-top: 0;
  font-size: clamp(0.76rem, 2vw, 0.9rem);
  letter-spacing: clamp(2px, 0.7vw, 3px);
}

.cover-publisher {
  margin-top: 0.35rem;
  font-size: clamp(0.7rem, 1.8vw, 0.78rem);
}

/* Tablet/mobile-width cover: keep the title inside the gold frame and preserve
   the centered front-cover composition before the narrow-phone breakpoint. */
@media (max-width: 768px) {
  .book-cover {
    min-height: 0;
    padding: 2.2rem 1.35rem 1.8rem 2rem;
  }

  .cover-title {
    max-width: 330px;
    font-size: clamp(2.15rem, 8vw, 2.9rem);
    line-height: 1.02;
    letter-spacing: -0.015em;
  }

  .cover-subtitle {
    max-width: 320px;
  }

  .cover-description {
    max-width: 320px;
  }

  .cover-btn {
    width: min(100%, 320px);
  }

  .cover-stats {
    width: min(340px, 100%);
  }

  .cover-footer {
    margin-top: 1.45rem;
  }
}

/* Small-screen cover: prioritize the whole composition over excess height. */
@media (max-width: 640px) {
  .book-cover-container {
    align-items: flex-start;
    padding: max(0.7rem, env(safe-area-inset-top)) 0.7rem 1.2rem;
  }

  .book-wrapper-3d {
    width: 100%;
  }

  .book-cover {
    min-height: 0;
    padding: 2.05rem 1.25rem 1.65rem 1.9rem;
    border-radius: 7px 9px 9px 7px;
    box-shadow:
      -4px 5px 0 rgba(0,0,0,0.35),
      0 14px 32px rgba(0,0,0,0.68),
      inset 0 0 0 1px rgba(255,255,255,0.03);
  }

  .book-cover::after {
    inset: 8px 8px 8px 27px;
  }

  .book-cover::before {
    display: block;
    width: 18px;
    border-radius: 5px 0 0 5px;
  }

  .book-cover-border {
    display: block;
    top: 16px;
    bottom: 16px;
    left: 31px;
    right: 10px;
    border-color: rgba(212,175,55,0.42);
  }

  .book-cover-border::after {
    top: 4px;
    bottom: 4px;
    left: 4px;
    right: 4px;
  }

  .corner-ornament {
    display: block;
    width: 27px;
    height: 27px;
  }

  .corner-top-left { left: 26px; top: 9px; }
  .corner-bottom-left { left: 26px; bottom: 9px; }
  .corner-top-right { right: 9px; top: 9px; }
  .corner-bottom-right { right: 9px; bottom: 9px; }

  .cover-header {
    margin-bottom: 0.85rem;
  }

  .cover-badge {
    letter-spacing: 2.7px;
    margin-bottom: 0.45rem;
  }

  .cover-title {
    max-width: 300px;
    font-size: clamp(2.05rem, 10vw, 2.8rem);
    line-height: 0.98;
  }

  .cover-subtitle {
    margin-top: 0.6rem;
    font-size: 0.82rem;
    line-height: 1.35;
  }

  .cover-crest {
    margin: 0.7rem 0;
  }

  .cover-crest svg {
    width: 78px;
  }

  .cover-content > .cover-description {
    font-size: 0.84rem;
    line-height: 1.48;
    max-width: 310px;
  }

  .cover-btn {
    width: min(100%, 310px);
    min-height: 48px;
    margin-top: 1rem;
    padding: 0.72rem 1.25rem;
    font-size: 0.84rem;
    letter-spacing: 2.2px;
  }

  .cover-stats {
    gap: 0.45rem;
    margin-top: 1rem;
    padding-top: 0.8rem;
  }

  .cover-stat-value {
    font-size: 1.25rem;
  }

  .cover-stat-label {
    font-size: 0.58rem;
    letter-spacing: 1px;
  }

  .cover-footer {
    margin-top: 1.35rem;
    padding-top: 0.65rem;
  }

  .cover-author {
    font-size: 0.7rem;
    letter-spacing: 2px;
  }

  .cover-publisher {
    font-size: 0.68rem;
  }
}

@media (max-width: 360px) {
  .book-cover {
    padding-left: 1.7rem;
    padding-right: 1rem;
  }

  .cover-title {
    max-width: 270px;
    font-size: 2.05rem;
  }

  .cover-subtitle {
    font-size: 0.76rem;
  }

  .cover-content > .cover-description {
    font-size: 0.79rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .book-wrapper-3d,
  .cover-btn {
    transition: none;
  }
}