:root {
  --color-bg: #f5f4ed;
  --color-surface: #faf9f5;
  --color-border: #e5e2d9;
  --color-text: #1f1e1d;
  --color-text-muted: #6b6a64;
  --color-accent: #cc7a5c;
  --color-accent-dark: #b5643f;
  --font-serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

header.site-header {
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.site-header {
  display: flex;
  align-items: center;
  padding: 1.25rem 2rem;
}

.brand {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--color-text);
  text-decoration: none;
  font-weight: 600;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
}

.container-wide {
  max-width: none;
}

main {
  flex: 1;
  padding: 3rem 2rem;
}

.welcome-subtext {
  color: var(--color-text-muted);
  font-size: 1.05rem;
  margin: 0 0 2.5rem 0;
}

.tile-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.25rem;
}

.tile {
  display: block;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 1.5rem;
  text-decoration: none;
  color: var(--color-text);
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.tile:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.tile-title {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  margin: 0 0 0.4rem 0;
}

.tile-description {
  color: var(--color-text-muted);
  font-size: 0.92rem;
  margin: 0;
}

.empty-state {
  border: 1px dashed var(--color-border);
  border-radius: 12px;
  padding: 2.5rem;
  text-align: center;
  color: var(--color-text-muted);
}

.page-heading {
  font-family: var(--font-serif);
  font-size: 2.25rem;
  font-weight: 500;
  margin: 0 0 0.5rem 0;
}

.spacetime-page {
  padding: 0 1.5rem;
}

.moon-corner {
  width: 130px;
  margin: 1.5rem auto 0 auto;
  text-align: center;
}

.moon-corner canvas {
  display: block;
  margin: 0 auto;
}

.panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 1.5rem;
}

.solar-panel {
  margin-top: 1.5rem;
  background: #06060c;
  border-color: #201f2c;
  color: #f0efe8;
}

.solar-panel .panel-note {
  color: #8f8d9c;
}

.panel canvas {
  display: block;
  width: 100%;
  height: auto;
}

.panel-note {
  color: var(--color-text-muted);
  font-size: 0.82rem;
  margin: 1rem 0 0 0;
}

.moon-phase-name {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  text-align: center;
  margin: 0.5rem 0 0.15rem 0;
}

.moon-illumination {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.72rem;
  margin: 0;
  line-height: 1.3;
}

.trace-panel {
  margin-top: 1.5rem;
  max-width: 640px;
}

.trace-instructions {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  line-height: 1.7;
  margin: 0 0 1rem 0;
}

.trace-instructions code {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 0.1rem 0.4rem;
  font-size: 0.85rem;
}

.trace-input {
  width: 100%;
  font-family: ui-monospace, "Cascadia Code", "SF Mono", Consolas, monospace;
  font-size: 0.82rem;
  padding: 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: #fff;
  color: var(--color-text);
  resize: vertical;
}

.trace-submit {
  margin-top: 0.75rem;
  padding: 0.6rem 1.25rem;
  border: none;
  border-radius: 8px;
  background: var(--color-accent);
  color: #fff;
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.15s ease;
}

.trace-submit:hover {
  background: var(--color-accent-dark);
}

.trace-submit:disabled {
  opacity: 0.6;
  cursor: default;
}

.trace-status {
  color: var(--color-text-muted);
  font-size: 0.88rem;
  min-height: 1.2rem;
  margin: 0.75rem 0 0 0;
}

.hop-list {
  list-style: none;
  margin: 1rem 0 0 0;
  padding: 0;
}

.hop-item {
  display: flex;
  gap: 1rem;
  padding-bottom: 1.25rem;
  position: relative;
}

.hop-item:not(:last-child)::before {
  content: "";
  position: absolute;
  left: 13px;
  top: 28px;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}

.hop-marker {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-accent);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
}

.hop-item-empty .hop-marker {
  background: var(--color-border);
  color: var(--color-text-muted);
}

.hop-detail {
  padding-top: 0.2rem;
}

.hop-ip {
  font-family: ui-monospace, "Cascadia Code", "SF Mono", Consolas, monospace;
  font-size: 0.9rem;
}

.hop-location {
  color: var(--color-text-muted);
  font-size: 0.85rem;
}