:root {
  --bg: #f4f7fb;
  --panel: rgba(255,255,255,0.92);
  --ink: #0f1b33;
  --muted: #64748b;
  --line: #dbe4f0;
  --blue: #1057c8;
  --green: #16833a;
  --red: #d43a36;
  --amber: #bd7b00;
  --shadow: 0 22px 60px rgba(16, 35, 77, .12);
  --radius: 22px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, Segoe UI, Arial, sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at 20% 0%, #e8f0ff 0, transparent 32%), var(--bg);
}
.hero {
  display: flex;
  justify-content: space-between;
  gap: 28px;
  align-items: flex-end;
  padding: 40px clamp(20px, 4vw, 56px) 22px;
}
h1 { margin: 0; font-size: clamp(28px, 4vw, 52px); line-height: 1.02; letter-spacing: -0.04em; }
h2 { margin: 0 0 10px; font-size: 22px; }
h3 { margin: 0 0 10px; font-size: 16px; }
p { color: var(--muted); line-height: 1.55; }
.lead { max-width: 850px; font-size: 18px; }
.eyebrow { margin: 0 0 10px; color: var(--blue); font-weight: 800; text-transform: uppercase; letter-spacing: .08em; font-size: 12px; }
.hero-card {
  min-width: 280px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 18px;
  display: flex;
  gap: 14px;
  align-items: center;
  box-shadow: var(--shadow);
}
.hero-card small { display: block; color: var(--muted); margin-top: 4px; }
.status-dot { width: 14px; height: 14px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 7px rgba(22, 131, 58, .12); }
.layout { display: grid; grid-template-columns: minmax(360px, 520px) 1fr; gap: 24px; padding: 0 clamp(20px, 4vw, 56px) 44px; }
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 24px; }
.tabs { display: flex; gap: 8px; margin-bottom: 22px; padding: 6px; background: #eef4ff; border-radius: 16px; }
.tab { flex: 1; border: 0; background: transparent; border-radius: 12px; padding: 12px 10px; color: var(--muted); font-weight: 800; cursor: pointer; }
.tab.is-active { background: white; color: var(--blue); box-shadow: 0 6px 20px rgba(16, 87, 200, .12); }
.tab-content { display: none; }
.tab-content.is-active { display: block; }
.upload-box { border: 1px dashed #a8b8d4; background: #f9fbff; border-radius: 18px; padding: 18px; display: grid; gap: 16px; }
.upload-box input[type=file] { display: none; }
.upload-box label[for] { min-height: 96px; border: 1px solid var(--line); border-radius: 16px; display: grid; place-items: center; text-align: center; background: white; cursor: pointer; }
.upload-box label span { display: block; color: var(--muted); margin-top: 6px; font-size: 13px; }
button { border: 0; border-radius: 14px; padding: 13px 18px; background: var(--blue); color: white; font-weight: 800; cursor: pointer; }
button:disabled { opacity: .55; cursor: wait; }
button.ghost { background: white; color: var(--blue); border: 1px solid var(--line); }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
label { color: var(--muted); font-size: 14px; font-weight: 700; }
input, textarea { width: 100%; margin-top: 8px; border: 1px solid var(--line); border-radius: 12px; padding: 12px; font: inherit; background: white; color: var(--ink); }
textarea { min-height: 110px; resize: vertical; }
.ai-grid { display: grid; gap: 14px; }
.mini-form { border: 1px solid var(--line); border-radius: 18px; padding: 16px; background: #fbfdff; display: grid; gap: 12px; }
.check { display: flex; gap: 8px; align-items: center; }
.check input { width: auto; margin: 0; }
.text-output { white-space: pre-wrap; background: #0e172a; color: #dbeafe; border-radius: 16px; padding: 16px; max-height: 320px; overflow: auto; }
.message { margin-top: 16px; border-radius: 14px; padding: 14px; background: #fff7e6; color: #7a4d00; }
.panel-head { display: flex; justify-content: space-between; align-items: center; gap: 18px; margin-bottom: 18px; }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin: 16px 0 20px; }
.stats div { border: 1px solid var(--line); border-radius: 18px; background: #fbfdff; padding: 16px; }
.stats span { display: block; font-size: 30px; font-weight: 900; }
.stats small { color: var(--muted); }
.viewer { min-height: 520px; border: 1px solid var(--line); background: #101827; border-radius: 20px; overflow: hidden; display: grid; place-items: center; }
.viewer img { width: 100%; height: 100%; max-height: 680px; object-fit: contain; display: block; }
.viewer.is-empty img { display: none; }
.placeholder { color: #cbd5e1; text-align: center; padding: 40px; }
.viewer:not(.is-empty) .placeholder { display: none; }
.nav-row { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin: 16px 0; }
#frameLabel { color: var(--muted); font-weight: 800; }
.frame-info { border: 1px solid var(--line); border-radius: 18px; padding: 18px; background: #fbfdff; }
.frame-info dl { margin: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.frame-info dl div { padding-top: 12px; border-top: 1px solid var(--line); }
dt { color: var(--muted); font-size: 13px; }
dd { margin: 5px 0 0; font-weight: 900; }
.history { margin-top: 18px; border-top: 1px solid var(--line); padding-top: 14px; }
.history-item { padding: 12px; border: 1px solid var(--line); border-radius: 14px; margin-top: 10px; background: white; cursor: pointer; }
.history-item strong { display: block; }
.history-item small { color: var(--muted); }
@media (max-width: 980px) {
  .hero { display: block; }
  .hero-card { margin-top: 20px; }
  .layout { grid-template-columns: 1fr; }
  .viewer { min-height: 360px; }
}
@media (max-width: 640px) {
  .stats { grid-template-columns: 1fr 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .tabs { flex-direction: column; }
}

.stats-note {
  margin: -4px 0 10px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}
.frame-info dl {
  grid-template-columns: repeat(4, 1fr);
}
.frame-ai {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}
.frame-ai-head {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: flex-start;
  margin-bottom: 12px;
}
.frame-ai-head h3 {
  margin-bottom: 4px;
}
.frame-ai-head small {
  color: var(--muted);
  line-height: 1.45;
}
.frame-ai-head button {
  white-space: nowrap;
  padding: 10px 14px;
}
.frame-ai-text {
  white-space: pre-wrap;
  background: #f4f8ff;
  border: 1px solid #d8e6ff;
  border-radius: 16px;
  padding: 16px;
  color: #172033;
  line-height: 1.6;
  min-height: 120px;
}
@media (max-width: 900px) {
  .frame-info dl {
    grid-template-columns: 1fr 1fr;
  }
  .frame-ai-head {
    display: block;
  }
  .frame-ai-head button {
    margin-top: 12px;
  }
}
@media (max-width: 520px) {
  .frame-info dl {
    grid-template-columns: 1fr;
  }
}