:root {
  --bg: #050912;
  --bg2: #0a1224;
  --panel: rgba(13, 22, 44, 0.72);
  --neon: #18a0ff;
  --neon2: #34e0ff;
  --neon-dim: rgba(24, 160, 255, 0.35);
  --text: #d6ecff;
  --muted: #6f88ad;
  --danger: #ff5b6e;
  --ok: #36e6a0;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: radial-gradient(1200px 700px at 50% -10%, #0d1c3a 0%, var(--bg) 55%);
  position: relative;
  overflow-x: hidden;
}

.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--neon-dim) 1px, transparent 1px),
    linear-gradient(90deg, var(--neon-dim) 1px, transparent 1px);
  background-size: 44px 44px;
  opacity: 0.06;
  pointer-events: none;
  z-index: 0;
}

header, main, footer { position: relative; z-index: 1; }

header { text-align: center; padding: 38px 16px 10px; }
header h1 {
  margin: 0;
  font-size: clamp(26px, 5vw, 46px);
  font-weight: 800;
  letter-spacing: 4px;
  color: #eafaff;
  text-shadow: 0 0 14px var(--neon), 0 0 38px var(--neon-dim);
}
.sub { margin: 8px 0 0; color: var(--muted); letter-spacing: 1px; }

main {
  max-width: 1040px;
  margin: 0 auto;
  padding: 18px 16px 40px;
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--neon-dim);
  border-radius: 16px;
  padding: 22px;
  backdrop-filter: blur(8px);
  box-shadow: 0 0 0 1px rgba(24,160,255,0.05), 0 10px 40px rgba(0,0,0,0.45);
}

.row { display: flex; gap: 16px; flex-wrap: wrap; }
.field { display: flex; flex-direction: column; gap: 8px; margin-top: 16px; flex: 1; min-width: 160px; }
.field:first-child { margin-top: 0; }
.row .field { margin-top: 0; }
label { font-size: 12px; text-transform: uppercase; letter-spacing: 1.5px; color: var(--muted); }
.peak-marker-field { max-width: 230px; }
.field-help { color: var(--muted); font-size: 11px; line-height: 1.35; }

input[type="date"], select, textarea {
  background: #060d1d;
  border: 1px solid var(--neon-dim);
  border-radius: 10px;
  color: var(--text);
  padding: 11px 12px;
  font-size: 15px;
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}
input[type="date"]:focus, select:focus, textarea:focus {
  border-color: var(--neon);
  box-shadow: 0 0 0 3px rgba(24,160,255,0.18);
}
input[type="date"] { color-scheme: dark; }

.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 14px; border-radius: 999px; cursor: pointer;
  border: 1px solid var(--neon-dim); background: #060d1d;
  font-size: 13px; letter-spacing: .3px; text-transform: none; color: var(--muted);
  transition: all .15s;
}
.chip input { accent-color: var(--neon); }
.chip:has(input:checked) {
  color: #eafaff; border-color: var(--neon);
  box-shadow: 0 0 12px var(--neon-dim); background: rgba(24,160,255,0.12);
}
.link-btn {
  align-self: flex-start; background: none; border: none; color: var(--neon2);
  cursor: pointer; font-size: 12px; padding: 0; text-decoration: underline;
}

.seg { display: inline-flex; border: 1px solid var(--neon-dim); border-radius: 10px; overflow: hidden; }
.seg-btn {
  background: #060d1d; color: var(--muted); border: none; padding: 10px 16px;
  cursor: pointer; font-size: 13px; transition: all .15s;
}
.seg-btn.active { background: rgba(24,160,255,0.18); color: #eafaff; }

.upload { margin-top: 12px; display: flex; flex-direction: column; gap: 10px; }
textarea { width: 100%; min-height: 120px; resize: vertical; font-family: ui-monospace, monospace; font-size: 12px; }
input[type="file"] { color: var(--muted); font-size: 13px; }

.actions { align-items: center; justify-content: space-between; margin-top: 22px; }
.dark-toggle { display: inline-flex; align-items: center; gap: 8px; text-transform: none; color: var(--text); cursor: pointer; }
.dark-toggle input { accent-color: var(--neon); }

button.primary {
  background: linear-gradient(135deg, var(--neon), #0b6dff);
  color: #021024; border: none; border-radius: 12px;
  padding: 13px 30px; font-size: 16px; font-weight: 700; letter-spacing: .5px;
  cursor: pointer; box-shadow: 0 0 18px var(--neon-dim);
  transition: transform .1s, box-shadow .15s;
}
button.primary:hover { box-shadow: 0 0 28px var(--neon); transform: translateY(-1px); }
button.primary:disabled { opacity: .55; cursor: wait; box-shadow: none; }

.status { margin: 14px 0 0; min-height: 18px; font-size: 14px; color: var(--muted); }
.status.err { color: var(--danger); }
.status.ok { color: var(--ok); }

.result-bar { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 16px; flex-wrap: wrap; }
#meta { color: var(--muted); font-size: 13px; }
.dl { display: flex; gap: 10px; }
.dl button {
  background: #060d1d; border: 1px solid var(--neon); color: var(--neon2);
  border-radius: 10px; padding: 9px 16px; cursor: pointer; font-size: 14px; font-weight: 600;
  transition: all .15s;
}
.dl button:hover { background: rgba(24,160,255,0.15); box-shadow: 0 0 14px var(--neon-dim); }

.img-wrap { background: #fff; border-radius: 12px; padding: 8px; overflow-x: auto; }
.img-wrap img { display: block; width: 100%; height: auto; max-width: 100%; }

footer { text-align: center; color: var(--muted); font-size: 12px; padding: 20px; }

.hidden { display: none !important; }

@media (max-width: 560px) {
  header h1 { font-size: clamp(18px, 6vw, 24px); letter-spacing: clamp(1px, .5vw, 2px); }
  .row { flex-direction: column; }
  .peak-marker-field { max-width: none; width: 100%; }
}