@import "shared/base.css";

/* ===== Landing header ===== */
.site-header {
  position: relative;
  padding: 4.5rem 0 3.75rem;
}

.header-content {
  position: relative;
  z-index: 2;
}

.site-header h1 {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.15rem;
}

.site-header .description {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 0.65rem;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 0.15rem;
  font-size: 0.82rem;
}

.header-nav a { color: var(--text-tertiary); transition: color 0.15s; }
.header-nav a:hover { color: var(--accent); text-decoration: none; }
.header-nav .sep { color: var(--dot); margin: 0 0.3rem; user-select: none; }

/* ===== Controls ===== */
.controls {
  display: flex;
  justify-content: flex-end;
  padding-bottom: 0.75rem;
}

.sort-btn {
  background: none;
  border: none;
  font-size: 0.78rem;
  color: var(--text-tertiary);
  cursor: pointer;
  padding: 0;
  transition: color 0.15s;
  letter-spacing: 0.01em;
}
.sort-btn:hover { color: var(--text-secondary); }

/* ===== Year groups ===== */
.year-group + .year-group {
  margin-top: 1.8rem;
}

.year-label {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--year-text);
  letter-spacing: 0.06em;
  padding-bottom: 0.6rem;
  font-variant-numeric: tabular-nums;
}

/* ===== Papers — timeline ===== */
.year-papers {
  position: relative;
  padding-left: 1.4rem;
}

.year-papers::before {
  content: "";
  position: absolute;
  left: 2.5px;
  top: 0.7rem;
  bottom: 0.7rem;
  width: 1px;
  background: var(--node-line);
}

.year-papers.single::before {
  display: none;
}

.paper {
  position: relative;
  padding: 0.7rem 0;
}

.paper::before {
  content: "";
  position: absolute;
  left: -1.4rem;
  top: calc(0.7rem + 0.5rem);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--node);
  transform: translateX(-50%);
  margin-left: 3px;
  z-index: 2;
  transition: background 0.2s;
}

.paper:first-child::before {
  background: var(--text-tertiary);
}

.paper-body {
  min-width: 0;
}

.paper-title {
  font-size: 0.92rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text);
  margin-bottom: 0.15rem;
  letter-spacing: -0.005em;
}

.paper-authors {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 0.3rem;
}

.paper-footer {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.78rem;
  line-height: 1;
}

.paper-venue {
  color: var(--venue-text);
  font-weight: 600;
}

.paper-links {
  display: inline-flex;
  align-items: center;
  gap: 0.05rem;
}

.paper-links a {
  color: var(--text-tertiary);
  transition: color 0.15s;
  font-size: 0.78rem;
}
.paper-links a:hover { color: var(--accent); text-decoration: none; }
.paper-links .lsep { color: var(--dot); margin: 0 0.3rem; font-size: 0.55rem; user-select: none; }

.paper-links .page-link {
  color: var(--accent);
  font-weight: 500;
}

/* ===== Landing footer ===== */
.site-footer {
  padding: 2.5rem 0 2rem;
  font-size: 0.68rem;
  color: var(--text-tertiary);
  opacity: 0.6;
  letter-spacing: 0.02em;
}

/* ===== Loading ===== */
.loading {
  text-align: center;
  color: var(--text-tertiary);
  padding: 3rem 0;
  font-size: 0.88rem;
}

/* ===== Landing responsive ===== */
@media (max-width: 640px) {
  /* Theme toggle is now position:fixed, so site-header padding-top owns
     the entire space above the h1 (matches the back-link's top offset) */
  .site-header { padding: 4rem 0 1rem; }
  .site-header h1 { font-size: 1.2rem; margin-bottom: 0.2rem; }
  .site-header .description { font-size: 0.85rem; margin-bottom: 0.55rem; }

  .header-nav {
    flex-wrap: wrap;
    row-gap: 0.2rem;
  }

  .controls { padding-bottom: 0.4rem; }

  .year-group + .year-group { margin-top: 0.9rem; }

  .year-label {
    font-size: 0.77rem;
    padding-bottom: 0.5rem;
  }

  .year-papers { padding-left: 1.2rem; }
  .paper::before { left: -1.2rem; }
  .year-papers::before { left: 2px; }

  .paper { padding: 0.55rem 0; }
  .paper-title { font-size: 0.9rem; }
  .paper-authors { font-size: 0.8rem; }
}