:root {
  --bg: #f4efe7;
  --card: rgba(255, 255, 255, 0.82);
  --ink: #1c2431;
  --muted: #576073;
  --line: rgba(28, 36, 49, 0.12);
  --accent: #d86f45;
  --accent-dark: #ab4f29;
  --shadow: 0 24px 60px rgba(54, 39, 23, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(216, 111, 69, 0.22), transparent 28%),
    radial-gradient(circle at right 10% top 20%, rgba(56, 123, 255, 0.12), transparent 24%),
    linear-gradient(180deg, #fbf8f2 0%, var(--bg) 100%);
}

.shell {
  width: min(920px, calc(100% - 32px));
  margin: 40px auto 64px;
}

.hero,
.panel,
.tips {
  background: var(--card);
  backdrop-filter: blur(14px);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: var(--shadow);
}

.hero {
  padding: 36px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent-dark);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 12px;
}

h1,
h2 {
  margin: 0;
}

h1 {
  font-size: clamp(32px, 6vw, 56px);
  line-height: 1.02;
  max-width: 10ch;
}

.lede {
  margin: 16px 0 0;
  max-width: 58ch;
  line-height: 1.7;
  color: var(--muted);
  font-size: 17px;
}

.panel,
.tips {
  margin-top: 20px;
  padding: 28px;
}

.upload-form {
  display: grid;
  gap: 16px;
}

.dropzone {
  display: block;
  padding: 28px;
  border: 2px dashed rgba(216, 111, 69, 0.4);
  border-radius: 20px;
  background: rgba(255, 248, 244, 0.9);
  cursor: pointer;
}

.dropzone input {
  display: block;
  width: 100%;
  margin-bottom: 16px;
}

.drop-title {
  display: block;
  font-size: 20px;
  font-weight: 700;
}

.drop-hint {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  line-height: 1.6;
}

button,
a {
  transition: 0.18s ease;
}

button {
  appearance: none;
  border: 0;
  border-radius: 14px;
  padding: 14px 18px;
  font: inherit;
  font-weight: 700;
  color: white;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  cursor: pointer;
}

button:disabled {
  opacity: 0.7;
  cursor: progress;
}

.status {
  min-height: 24px;
  margin-top: 16px;
  color: #295c1f;
  font-weight: 600;
}

.status.error {
  color: #a63131;
}

.result {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.result-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  margin-top: 14px;
}

.result input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px;
  font: inherit;
  background: white;
}

#open-link {
  display: inline-block;
  margin-top: 12px;
  color: #0d5bd7;
  word-break: break-all;
}

.tips ul {
  margin: 14px 0 0;
  padding-left: 20px;
  color: var(--muted);
  line-height: 1.8;
}

.hidden {
  display: none;
}

@media (max-width: 700px) {
  .shell {
    width: min(100% - 20px, 920px);
    margin-top: 18px;
  }

  .hero,
  .panel,
  .tips {
    padding: 20px;
    border-radius: 18px;
  }

  .result-row {
    grid-template-columns: 1fr;
  }
}