:root {
  color-scheme: dark;
  --bg: #05050a;
  --panel: rgba(8, 18, 33, 0.82);
  --panel-strong: rgba(7, 16, 29, 0.94);
  --line: rgba(103, 169, 255, 0.22);
  --line-strong: rgba(122, 176, 255, 0.42);
  --text: #f7fbff;
  --muted: #a9b8cf;
  --dim: #6f7e96;
  --blue: #2293ff;
  --cyan: #42d4df;
  --violet: #8d61ff;
  --green: #20c86a;
}

* { box-sizing: border-box; }

body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 78% 0%, rgba(141, 97, 255, 0.22), transparent 28rem),
    radial-gradient(circle at 5% 88%, rgba(34, 147, 255, 0.18), transparent 26rem),
    linear-gradient(180deg, #05050a 0%, #06111f 55%, #05050a 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(66, 212, 223, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(66, 212, 223, 0.035) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: linear-gradient(180deg, transparent, black 12%, black 82%, transparent);
}

.shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: clamp(42px, 7vw, 90px) 0;
}

.hero {
  max-width: 860px;
  margin-bottom: clamp(28px, 5vw, 58px);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--cyan);
  font-size: 0.8rem;
  font-weight: 850;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1,
h2,
p {
  margin: 0;
  letter-spacing: 0;
}

h1 {
  max-width: 820px;
  font-size: clamp(2.8rem, 6vw, 5.8rem);
  line-height: 0.98;
}

.lead {
  max-width: 760px;
  margin-top: 24px;
  color: var(--muted);
  font-size: clamp(1.08rem, 2vw, 1.35rem);
  line-height: 1.65;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(320px, 0.82fr);
  gap: 22px;
  align-items: start;
}

.capture-card,
.result-card,
.tree-card {
  border: 1px solid var(--line);
  border-radius: 18px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.01)),
    var(--panel);
  box-shadow: 0 26px 80px rgba(0, 0, 0, 0.28);
  backdrop-filter: blur(18px);
}

.capture-card {
  padding: clamp(20px, 3vw, 30px);
}

.form-head,
.tree-head {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 20px;
}

.form-head p,
.tree-head p,
.result-card p,
.status-line {
  color: var(--muted);
  line-height: 1.55;
}

.session-pill {
  height: max-content;
  padding: 8px 10px;
  border: 1px solid rgba(66, 212, 223, 0.32);
  border-radius: 999px;
  color: var(--cyan);
  background: rgba(34, 147, 255, 0.08);
  font: 800 0.72rem ui-monospace, "Cascadia Code", monospace;
}

textarea,
input {
  width: 100%;
  border: 1px solid rgba(103, 169, 255, 0.24);
  border-radius: 12px;
  color: var(--text);
  background: rgba(2, 7, 17, 0.58);
  font: inherit;
}

textarea {
  min-height: 300px;
  resize: vertical;
  padding: 18px;
  line-height: 1.6;
}

input {
  min-height: 42px;
  padding: 0 12px;
}

label {
  display: grid;
  gap: 8px;
  color: #dce8f8;
  font-size: 0.86rem;
  font-weight: 760;
}

.metadata-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: 16px;
}

.wide { grid-column: 1 / -1; }

.location-row {
  grid-template-columns: 18px 1fr;
  align-items: center;
  color: var(--muted);
  font-weight: 600;
}

.location-row input {
  min-height: 0;
}

.image-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.image-chip,
.path-chip {
  padding: 7px 9px;
  border: 1px solid rgba(141, 97, 255, 0.34);
  border-radius: 999px;
  color: #d9e4ff;
  background: rgba(141, 97, 255, 0.1);
  font-size: 0.78rem;
}

.primary-button {
  width: 100%;
  min-height: 50px;
  margin-top: 18px;
  border: 0;
  border-radius: 12px;
  color: white;
  background: linear-gradient(135deg, var(--blue), var(--violet));
  box-shadow: 0 18px 36px rgba(34, 147, 255, 0.26);
  font: 850 1rem Inter, system-ui, sans-serif;
  cursor: pointer;
}

.primary-button:disabled {
  cursor: wait;
  opacity: 0.62;
}

.status-line {
  min-height: 1.5em;
  margin-top: 12px;
}

.result-card {
  min-height: 520px;
  padding: clamp(20px, 3vw, 30px);
}

.result-card h2 {
  margin-bottom: 18px;
}

.result-block {
  display: grid;
  gap: 18px;
}

.result-block article {
  padding: 16px;
  border: 1px solid rgba(103, 169, 255, 0.18);
  border-radius: 12px;
  background: rgba(3, 12, 23, 0.54);
}

.result-block h3 {
  margin: 0 0 8px;
  color: var(--cyan);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.tree-card {
  margin-top: 22px;
  padding: clamp(20px, 3vw, 30px);
}

.tree-view {
  overflow-x: auto;
  padding: 18px;
  border: 1px solid rgba(103, 169, 255, 0.18);
  border-radius: 14px;
  background: rgba(3, 12, 23, 0.62);
}

.tree-node {
  margin: 0 0 0 18px;
  padding: 7px 0 7px 16px;
  border-left: 1px solid rgba(66, 212, 223, 0.18);
}

.tree-node strong {
  color: #edf6ff;
}

.tree-node small {
  color: var(--dim);
}

.empty-state {
  color: var(--muted);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
}

@media (max-width: 900px) {
  .workspace {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 620px) {
  .form-head,
  .tree-head,
  .metadata-grid {
    grid-template-columns: 1fr;
  }

  .form-head,
  .tree-head {
    display: grid;
  }
}