#upload-section { max-width: 760px; margin: 0 auto; padding: 32px 0; }

#drop-zone {
  background:
    radial-gradient(ellipse at top, #FFFFFF 0%, #FFF8EE 100%);
  padding: 40px 28px 48px;
  cursor: pointer;
  text-align: center;
  transition: all 0.25s;
  border-radius: 28px;
  position: relative;
  box-shadow:
    0 6px 0 rgba(255, 167, 105, 0.45),
    0 14px 32px -10px rgba(58, 31, 10, 0.18);
  border: 2px solid var(--orange-pale);
  overflow: hidden;
}

#drop-zone::before,
#drop-zone::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}
#drop-zone::before {
  width: 220px;
  height: 220px;
  top: -90px;
  left: -70px;
  background: radial-gradient(circle, rgba(255, 201, 60, 0.35) 0%, rgba(255, 201, 60, 0) 65%);
}
#drop-zone::after {
  width: 280px;
  height: 280px;
  bottom: -120px;
  right: -90px;
  background: radial-gradient(circle, rgba(255, 143, 163, 0.30) 0%, rgba(255, 143, 163, 0) 65%);
}

#drop-zone > * { position: relative; z-index: 1; }

#drop-zone:hover {
  transform: translateY(-3px);
  box-shadow:
    0 9px 0 rgba(255, 167, 105, 0.5),
    0 18px 36px -10px rgba(58, 31, 10, 0.22);
  border-color: var(--orange-l);
}
#drop-zone.dragover {
  background: radial-gradient(ellipse at top, #FFFFFF 0%, var(--orange-pale) 100%);
  border-color: var(--orange);
  border-style: solid;
  transform: scale(1.01);
}

.drop-icon {
  width: 110px;
  height: 110px;
  margin: 0 auto 18px;
  position: relative;
  animation: bounce-soft 2.4s ease-in-out infinite;
}

@keyframes bounce-soft {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-6px); }
}

.drop-icon-img {
  width: 100%;
  height: 100%;
  display: block;
  border-radius: 50%;
  box-shadow:
    0 6px 0 var(--orange-d),
    0 10px 22px -6px rgba(58, 31, 10, 0.28);
}

.drop-sparkle {
  position: absolute;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--yellow);
  box-shadow: 0 0 0 3px rgba(255, 201, 60, 0.3);
  animation: sparkle 2.2s ease-in-out infinite;
}
.drop-sparkle.s1 { top: -2px;    left: -2px;   animation-delay: 0s; }
.drop-sparkle.s2 { top: 8px;     right: -6px;  background: var(--pink); box-shadow: 0 0 0 3px rgba(255, 143, 163, 0.3); animation-delay: 0.5s; }
.drop-sparkle.s3 { bottom: -2px; right: 12px;  background: var(--teal); box-shadow: 0 0 0 3px rgba(78, 205, 196, 0.3); animation-delay: 1s; width: 9px; height: 9px; }
.drop-sparkle.s4 { bottom: 8px;  left: -8px;   width: 8px; height: 8px; animation-delay: 1.5s; }

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

.drop-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 6px;
  letter-spacing: 0.02em;
}

.drop-sub {
  font-family: var(--font-jp);
  font-weight: 700;
  font-size: 0.86rem;
  color: var(--ink-3);
  margin-top: 4px;
  letter-spacing: 0.02em;
}
.drop-sub.warn { color: var(--orange-d); font-weight: 800; }

.drop-format-tags {
  display: inline-flex;
  gap: 6px;
  margin-top: 10px;
  flex-wrap: wrap;
  justify-content: center;
}
.format-tag {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.7rem;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--bg-soft);
  color: var(--orange-d);
  letter-spacing: 0.06em;
}
.format-tag-special {
  background: var(--orange);
  color: #fff;
  letter-spacing: 0.04em;
}

.drop-divider {
  height: 2px;
  background: repeating-linear-gradient(90deg, var(--line) 0, var(--line) 6px, transparent 6px, transparent 12px);
  width: 50%;
  margin: 18px auto 14px;
}

.drop-note {
  font-size: 0.78rem;
  color: var(--ink-3);
  line-height: 1.7;
  font-weight: 500;
}

.top-buttons {
  margin-top: var(--gap-lg);
  display: flex;
  gap: var(--gap-md);
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  font-family: var(--font-jp);
  font-weight: 800;
  font-size: 0.92rem;
  letter-spacing: 0.04em;
  padding: 12px 22px;
  min-height: var(--tap-min);
  background: var(--card);
  color: var(--ink);
  border: 2px solid var(--line);
  border-radius: var(--radius-md);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: all 0.12s;
}
.btn:hover {
  border-color: var(--orange-l);
  background: #FFFEFB;
  transform: translateY(-1px);
  box-shadow: 0 4px 0 rgba(58, 31, 10, 0.08);
}
.btn:active { transform: translateY(1px); box-shadow: var(--shadow-press); }

.btn.primary {
  background: var(--orange);
  color: #fff;
  border-color: var(--orange-d);
  box-shadow: 0 3px 0 var(--orange-d);
}
.btn.primary:hover {
  background: #FF7B2E;
  border-color: var(--orange-d);
  box-shadow: 0 4px 0 var(--orange-d);
}
.btn.primary:active { box-shadow: 0 1px 0 var(--orange-d); }

.btn.accent {
  background: var(--yellow);
  color: var(--ink);
  border-color: #E5A823;
  box-shadow: 0 3px 0 #E5A823;
}
.btn.accent:hover { background: #FFD352; }

.btn.ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--ink-2);
}
.btn.ghost:hover {
  background: var(--bg-soft);
  color: var(--ink);
  border-color: var(--orange-l);
}

.btn.small { font-size: 0.84rem; padding: 9px 16px; min-height: 38px; border-radius: var(--radius-sm); }
.btn.tiny  { font-size: 0.78rem; padding: 7px 12px; min-height: 34px; border-radius: var(--radius-sm); }

@media (max-width: 600px) {
  #upload-section { padding: 18px 0; }
  #drop-zone { padding: 30px 22px 36px; border-radius: 22px; }
  .drop-icon { width: 90px; height: 90px; margin-bottom: 14px; }
  .drop-title { font-size: 1.1rem; }
  .top-buttons { gap: var(--gap-sm); }
  .btn { font-size: 0.86rem; padding: 11px 18px; }
}

@media (hover: none) {
  #drop-zone:hover { transform: none; }
  .drop-icon { animation: none; }
}