.signal-page {
  max-width: 1180px;
}

.signal-panel,
.signal-module {
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: linear-gradient(155deg, rgba(15, 23, 42, 0.78), rgba(30, 41, 59, 0.52));
  border-radius: 22px;
  padding: clamp(1.2rem, 2.4vw, 2rem);
  box-shadow: 0 22px 40px rgba(2, 6, 23, 0.36);
  margin-bottom: 1.2rem;
}

.signal-hero {
  border: none;
  background: none;
  border-radius: 0;
  box-shadow: none;
  padding: 0;
  margin-bottom: 1.6rem;
  position: relative;
}

.signal-hero h1 {
  margin: 0;
  color: #fff;
  font-size: clamp(2.2rem, 3.5vw, 3rem);
  letter-spacing: -0.03em;
  line-height: 1.15;
  font-weight: 700;
}

.signal-hero-desc {
  color: rgba(255, 255, 255, 0.6);
  margin-top: 1rem;
  line-height: 1.8;
  font-size: 1.05rem;
  max-width: 680px;
}

.signal-hero::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  margin-top: 2rem;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: 2px;
}

.signal-hero-actions {
  margin-top: 1rem;
  display: flex;
  gap: 0.72rem;
  flex-wrap: wrap;
}

.signal-panel-head h2 {
  margin: 0;
  color: #e2e8f0;
  font-size: 1.35rem;
}

.signal-abstract-grid {
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: 1.5rem;
  margin-top: 0.9rem;
}

.signal-abstract-text p {
  color: rgba(226, 232, 240, 0.84);
  line-height: 1.72;
  margin: 0;
}

.signal-abstract-text .signal-hero-actions {
  margin-top: 1.2rem;
}

.signal-hero-actions .button i {
  margin-right: 0.5em;
}

.signal-keywords {
  margin-top: 0.8rem;
  font-size: 0.88rem;
  color: rgba(226, 232, 240, 0.6);
}

.signal-keywords-label {
  font-weight: 600;
  color: rgba(226, 232, 240, 0.8);
}

.signal-card {
  border: 1px solid rgba(148, 163, 184, 0.26);
  border-radius: 16px;
  background: rgba(2, 6, 23, 0.45);
  padding: 0.9rem;
}

.signal-doc-image {
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid rgba(148, 163, 184, 0.26);
  background: rgba(2, 6, 23, 0.45);
}

.signal-doc-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.signal-module {
  border-color: rgba(148, 163, 184, 0.3);
}

.signal-module-head {
  display: flex;
  gap: 0.82rem;
  align-items: flex-start;
  margin-bottom: 0.9rem;
}

.signal-module-index {
  width: 2.05rem;
  height: 2.05rem;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  color: #0f172a;
  font-weight: 600;
  background: #22d3ee;
  flex-shrink: 0;
}

.signal-module-head h2 {
  margin: 0;
  color: #e2e8f0;
  font-size: 1.42rem;
}

.signal-module-head p {
  margin: 0.46rem 0 0 0;
  color: rgba(226, 232, 240, 0.82);
  line-height: 1.74;
}

.signal-module-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

.signal-module-grid > :nth-child(5):last-child,
.signal-module-grid > :nth-child(5):nth-last-child(2) {
  grid-column: auto;
}

.signal-file-card {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
              border-color 0.3s cubic-bezier(0.4, 0, 0.2, 1),
              background 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.signal-file-card:hover {
  transform: translateY(-4px);
  border-color: rgba(99, 102, 241, 0.6);
  background: rgba(99, 102, 241, 0.08);
}

.signal-file-thumb {
  width: 80px;
  height: 60px;
  border-radius: 10px;
  overflow: hidden;
  flex-shrink: 0;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(2, 6, 23, 0.5);
}

.signal-file-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.signal-file-info {
  flex: 1;
  min-width: 0;
}

.signal-file-info h3 {
  margin: 0 0 0.3rem 0;
  color: #dbeafe;
  font-size: 1.04rem;
}

.signal-file-ext {
  display: inline-block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  color: rgba(255, 255, 255, 0.45);
  margin-bottom: 0.4rem;
}

.signal-file-info p {
  color: rgba(226, 232, 240, 0.7);
  font-size: 0.88rem;
  line-height: 1.6;
  margin: 0;
}

@media (max-width: 1023px) {
  .signal-abstract-grid {
    grid-template-columns: 1fr;
  }

  .signal-module-grid {
    grid-template-columns: 1fr;
  }

  .signal-hero-actions {
    width: 100%;
  }
}

@media (max-width: 767px) {
  .signal-file-thumb {
    width: 64px;
    height: 48px;
  }
}