:root {
  --bg: #0b0f19;
  --bg-elev: #121729;
  --bg-elev-2: #1a2138;
  --border: #262f4a;
  --text: #e7ebf7;
  --text-dim: #8b94b3;
  --accent: #6c8dff;
  --accent-soft: rgba(108, 141, 255, 0.15);
  --normal: #4fd1c5;
  --ad: #ff7a7a;
  --danger: #ff6b6b;
  --danger-soft: rgba(255, 107, 107, 0.12);
  --radius: 14px;
  font-family: "Pretendard", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: radial-gradient(circle at 10% -10%, #17204a 0%, var(--bg) 45%);
  color: var(--text);
  min-height: 100vh;
}

.topbar {
  display: flex;
  align-items: center;
  padding: 22px 32px;
  border-bottom: 1px solid var(--border);
  background: rgba(11, 15, 25, 0.7);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand { display: flex; align-items: center; gap: 14px; }
.brand-mark { font-size: 34px; filter: drop-shadow(0 0 12px var(--accent-soft)); }
.brand h1 { margin: 0; font-size: 20px; letter-spacing: -0.01em; }
.brand p { margin: 2px 0 0; color: var(--text-dim); font-size: 13px; }

.layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 24px;
  padding: 24px 32px 64px;
  align-items: start;
}

.panel {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.controls { position: sticky; top: 96px; display: flex; flex-direction: column; gap: 4px; }
.controls h2 { font-size: 14px; margin: 18px 0 10px; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.06em; }
.controls h2:first-child { margin-top: 0; }

.dropzone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 22px 12px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
.dropzone:hover, .dropzone.dragover { border-color: var(--accent); background: var(--accent-soft); }
.dropzone-icon { font-size: 26px; display: block; margin-bottom: 6px; }
.dropzone p { margin: 2px 0; font-size: 13.5px; }
.dropzone .hint { color: var(--text-dim); font-size: 12px; }

.status { min-height: 18px; font-size: 12.5px; color: var(--text-dim); margin: 6px 2px 0; }
.status.ok { color: var(--normal); }
.status.err { color: var(--danger); }

.field { margin-bottom: 14px; }
.field label { display: block; font-size: 13px; margin-bottom: 6px; color: var(--text); }
.field .hint { color: var(--text-dim); font-weight: 400; font-size: 11.5px; }

input[type="number"], input[type="text"] {
  width: 100%;
  padding: 10px 12px;
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-size: 14px;
  outline: none;
  transition: border-color 0.15s;
}
input:focus { border-color: var(--accent); }

.segmented { display: flex; gap: 8px; }
.seg-btn {
  flex: 1;
  padding: 9px 0;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-elev-2);
  color: var(--text-dim);
  cursor: pointer;
  font-size: 13.5px;
  transition: all 0.15s;
}
.seg-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }

.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; min-height: 24px; }
.chip {
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: var(--bg-elev-2);
}
.chip.valid { color: var(--normal); border-color: rgba(79, 209, 197, 0.4); }
.chip.invalid { color: var(--danger); border-color: rgba(255, 107, 107, 0.4); background: var(--danger-soft); }

.error-msg { color: var(--danger); font-size: 12.5px; margin: 6px 2px 0; min-height: 16px; }

.primary-btn {
  margin-top: 18px;
  padding: 12px;
  border-radius: 10px;
  border: none;
  background: linear-gradient(135deg, var(--accent), #8a6cff);
  color: #fff;
  font-size: 14.5px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s, transform 0.1s;
}
.primary-btn:disabled { opacity: 0.35; cursor: not-allowed; }
.primary-btn:not(:disabled):hover { transform: translateY(-1px); }
.primary-btn:not(:disabled):active { transform: translateY(0); }

.results { display: flex; flex-direction: column; gap: 20px; min-width: 0; }

.empty-state {
  text-align: center;
  color: var(--text-dim);
  padding: 60px 20px;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
}
.empty-icon { font-size: 30px; display: block; margin-bottom: 10px; }
.hidden { display: none; }

.viewer-card {
  background: #05070d;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}
.viewer-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  padding: 10px 12px;
  color: var(--text-dim);
  border-bottom: 1px solid var(--border);
}
.viewer-sublabel { margin-left: auto; color: var(--text); font-weight: 600; }
.dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }
.dot-baseline { background: var(--accent); }
.dot-normal { background: var(--normal); }
.dot-ad { background: var(--ad); }

.viewer-media { width: 100%; height: 260px; display: block; background: #000; object-fit: contain; }
.baseline-card .viewer-media { height: 300px; }

.trajectory-panel h2 { font-size: 14px; margin: 0 0 16px; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.06em; }
.trajectory-panel h2 .hint { text-transform: none; letter-spacing: normal; }

.trajectory-table {
  display: grid;
  gap: 10px;
  overflow-x: auto;
}

.tt-cell { min-width: 0; }

.tt-corner { background: transparent; }

.tt-col-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  gap: 4px;
  padding-bottom: 4px;
}
.age-badge {
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 14px;
}
.delta-text { color: var(--text-dim); font-size: 12px; }

.tt-row-header {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  font-weight: 600;
  padding: 0 4px;
}

.tt-media {
  background: #05070d;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}
.tt-media .viewer-media { height: 180px; }

@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; }
  .controls { position: static; }
}