/* Khám phá không gian — core layout, cards */

:root {
  --kg-coral: #ff6b4a;
  --kg-coral-dim: rgba(255, 107, 74, 0.12);
  --kg-sky: #38bdf8;
  --kg-sky-dim: rgba(56, 189, 248, 0.12);
}

.kg-container { max-width: 1080px; padding-top: 40px; }
.back-link { display: inline-block; font-size: 0.9rem; color: var(--text-muted); margin-bottom: 24px; transition: color 0.2s ease; }
.back-link:hover { color: var(--accent); }
.kg-hero { margin-bottom: 28px; }
.kg-hero h1 { font-size: clamp(2rem, 5vw, 3rem); letter-spacing: 0.01em; }
.kg-hero .accent { color: var(--kg-coral); }
.kg-hero .tagline { font-size: 0.95rem; max-width: 720px; }

/* ── Grid ─────────────────────────────────────────────────── */
.kg-grid {
  display: grid; gap: 16px;
  grid-template-columns: 1fr;
}
@media (min-width: 880px) {
  .kg-grid { grid-template-columns: 2fr 1fr; }
}

/* ── Card shell ───────────────────────────────────────────── */
.kg-card {
  position: relative; overflow: hidden;
  background: var(--bg-elev); border: 1px solid var(--border); border-radius: 14px;
  padding: 22px 22px 24px;
  display: flex; flex-direction: column; gap: 16px;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
.kg-apod:hover { border-color: var(--kg-coral); box-shadow: 0 16px 40px rgba(255, 107, 74, 0.08); transform: translateY(-2px); }
.kg-iss:hover  { border-color: var(--kg-sky);   box-shadow: 0 16px 40px rgba(56, 189, 248, 0.08); transform: translateY(-2px); }

.kg-bignum {
  position: absolute; right: 16px; top: 4px; pointer-events: none;
  font-family: 'JetBrains Mono', monospace; font-size: 5.5rem; font-weight: 800; line-height: 1;
  color: rgba(255, 107, 74, 0.05);
}
.kg-bignum.sky { color: rgba(56, 189, 248, 0.05); }

.kg-card-eyebrow {
  font-family: 'JetBrains Mono', monospace; font-size: 0.72rem;
  letter-spacing: 0.2em; text-transform: uppercase; color: var(--text-muted); margin: 0;
}
.kg-card-eyebrow.sky { color: var(--kg-sky); opacity: 0.8; }
.kg-card-title {
  font-size: 1.3rem; font-weight: 700; margin: 0;
  display: flex; align-items: center; gap: 10px;
}
.kg-card-tick { color: var(--kg-coral); font-family: 'JetBrains Mono', monospace; font-size: 0.78rem; letter-spacing: 0.16em; }
.kg-card-tick.sky { color: var(--kg-sky); }
.kg-card-body { flex: 1; display: flex; flex-direction: column; }

/* ── States ───────────────────────────────────────────────── */
.kg-state {
  flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 14px; padding: 60px 16px; text-align: center; min-height: 200px;
}
.kg-state-icon { font-size: 2.6rem; line-height: 1; }
.kg-state-text {
  font-family: 'JetBrains Mono', monospace; font-size: 0.78rem;
  letter-spacing: 0.18em; text-transform: uppercase; color: var(--text-muted);
  max-width: 280px; line-height: 1.5;
}
.kg-state.is-error .kg-state-icon { color: var(--kg-coral); }
.kg-state.is-error .kg-state-text { color: var(--kg-coral); }
.kg-retry {
  margin-top: 6px; font: inherit; font-size: 0.8rem;
  font-family: 'JetBrains Mono', monospace; letter-spacing: 0.16em; cursor: pointer;
  padding: 8px 16px; border-radius: 6px;
  background: transparent; color: var(--kg-coral); border: 1px solid var(--kg-coral);
  transition: all 0.15s ease;
}
.kg-retry:hover { background: var(--kg-coral); color: #0F1923; }

/* Spin animation for loaders */
.kg-spin { animation: kg-spin 1.4s linear infinite; display: inline-block; }
@keyframes kg-spin { from { transform: rotate(0); } to { transform: rotate(360deg); } }

/* ── APOD content ─────────────────────────────────────────── */
.kg-apod-media {
  position: relative; width: 100%; aspect-ratio: 16 / 9;
  background: var(--bg); border: 1px solid var(--border); border-radius: 8px;
  overflow: hidden;
}
.kg-apod-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.kg-apod:hover .kg-apod-media img { transform: scale(1.03); }
.kg-apod-media iframe { width: 100%; height: 100%; border: 0; }
.kg-apod-meta { position: relative; z-index: 1; }
.kg-apod-title {
  font-size: 1.15rem; font-weight: 700; margin: 0 0 4px;
  transition: color 0.25s ease;
}
.kg-apod:hover .kg-apod-title { color: var(--kg-coral); }
.kg-apod-date {
  font-family: 'JetBrains Mono', monospace; font-size: 0.74rem;
  letter-spacing: 0.16em; text-transform: uppercase; color: var(--text-muted);
  margin: 0 0 10px;
}
.kg-apod-explanation { color: var(--text-muted); font-size: 0.92rem; line-height: 1.65; margin: 0; text-align: justify; }
.kg-apod-credit {
  font-family: 'JetBrains Mono', monospace; font-size: 0.7rem;
  letter-spacing: 0.12em; color: var(--text-muted); opacity: 0.7;
  margin-top: 12px;
}
.kg-apod-credit a { color: var(--kg-coral); text-decoration: none; }
.kg-apod-credit a:hover { text-decoration: underline; }