:root {
  --ink: #17201a;
  --muted: #5b675f;
  --line: rgba(23, 32, 26, 0.14);
  --paper: #f7f3e8;
  --panel: rgba(255, 252, 242, 0.86);
  --accent: #0f6f58;
  --accent-dark: #0a4c3d;
  --danger: #9c3425;
  --shadow: 0 24px 70px rgba(38, 47, 37, 0.18);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: "Aptos", "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 16% 16%, rgba(15, 111, 88, 0.26), transparent 24rem),
    radial-gradient(circle at 86% 10%, rgba(232, 152, 77, 0.24), transparent 20rem),
    linear-gradient(135deg, #fbf0d3 0%, #e7eee3 46%, #d8e7df 100%);
}

button,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

code {
  border-radius: 0.35rem;
  padding: 0.1rem 0.32rem;
  background: rgba(15, 111, 88, 0.11);
}

.shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 48px 0;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: 28px;
  align-items: end;
  margin-bottom: 28px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent-dark);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

.hero-title {
  max-width: 820px;
  margin-bottom: 14px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.09rem, 2.0vw, 2.1rem);
  line-height: 1.02;
  letter-spacing: -0.045em;
}

.lead {
  max-width: 720px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.7;
}

.hero-card {
  display: grid;
  gap: 8px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.58);
  box-shadow: var(--shadow);
}

.hero-card strong {
  font-size: 1.8rem;
}

.status-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #25b97f;
  box-shadow: 0 0 0 8px rgba(37, 185, 127, 0.16);
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.72fr);
  gap: 22px;
}

.panel,
.tips article {
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.panel {
  padding: 22px;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: start;
  margin-bottom: 16px;
}

.panel-head h2 {
  margin-bottom: 4px;
  font-size: 1.35rem;
}

.panel-head p {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.5;
}

textarea {
  width: 100%;
  min-height: 470px;
  resize: vertical;
  border: 1px solid rgba(23, 32, 26, 0.18);
  border-radius: 22px;
  padding: 18px;
  color: #102019;
  background: rgba(255, 255, 255, 0.72);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.6);
  font-family: "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 0.94rem;
  line-height: 1.55;
  outline: none;
}

textarea:focus {
  border-color: rgba(15, 111, 88, 0.58);
  box-shadow: 0 0 0 4px rgba(15, 111, 88, 0.12);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.primary-btn,
.secondary-btn,
.ghost-btn,
.danger-btn {
  border: 0;
  border-radius: 999px;
  padding: 11px 17px;
  font-weight: 750;
  transition: transform 0.16s ease, opacity 0.16s ease, box-shadow 0.16s ease;
}

.primary-btn {
  color: #fff;
  background: linear-gradient(135deg, var(--accent), #0a8d70);
  box-shadow: 0 10px 24px rgba(15, 111, 88, 0.26);
}

.secondary-btn {
  color: var(--accent-dark);
  background: rgba(15, 111, 88, 0.12);
}

.ghost-btn {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.64);
}

.danger-btn {
  color: #fff;
  background: var(--danger);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

button:not(:disabled):hover {
  transform: translateY(-1px);
}

.analysis {
  display: grid;
  gap: 8px;
  margin-top: 16px;
  color: var(--muted);
  font-size: 0.93rem;
}

.analysis-item {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  border-top: 1px solid rgba(23, 32, 26, 0.1);
  padding-top: 8px;
}

.analysis-item strong {
  color: var(--ink);
  word-break: break-all;
  text-align: right;
}

.counter {
  border-radius: 999px;
  padding: 7px 12px;
  color: var(--accent-dark);
  background: rgba(15, 111, 88, 0.12);
  font-weight: 700;
  white-space: nowrap;
}

.qr-wrap {
  display: grid;
  min-height: 410px;
  place-items: center;
  overflow: hidden;
  border: 1px dashed rgba(23, 32, 26, 0.2);
  border-radius: 26px;
  background:
    linear-gradient(45deg, rgba(255,255,255,0.56) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(255,255,255,0.56) 25%, transparent 25%);
  background-size: 22px 22px;
}

#qrCanvas {
  display: block;
  width: min(100%, 360px);
  max-width: calc(100vw - 96px);
  height: auto;
  border-radius: 18px;
  padding: clamp(8px, 2.8vw, 14px);
  background: #fff;
  box-shadow: 0 16px 48px rgba(23, 32, 26, 0.18);
}

.empty-state {
  display: grid;
  gap: 14px;
  place-items: center;
  color: var(--muted);
}

.scan-frame {
  width: 118px;
  height: 118px;
  border: 3px solid rgba(15, 111, 88, 0.36);
  border-radius: 24px;
  background:
    linear-gradient(var(--accent), var(--accent)) 18px 18px / 34px 3px no-repeat,
    linear-gradient(var(--accent), var(--accent)) 18px 18px / 3px 34px no-repeat,
    linear-gradient(var(--accent), var(--accent)) right 18px top 18px / 34px 3px no-repeat,
    linear-gradient(var(--accent), var(--accent)) right 18px top 18px / 3px 34px no-repeat,
    linear-gradient(var(--accent), var(--accent)) 18px bottom 18px / 34px 3px no-repeat,
    linear-gradient(var(--accent), var(--accent)) 18px bottom 18px / 3px 34px no-repeat,
    linear-gradient(var(--accent), var(--accent)) right 18px bottom 18px / 34px 3px no-repeat,
    linear-gradient(var(--accent), var(--accent)) right 18px bottom 18px / 3px 34px no-repeat;
}

.message {
  min-height: 24px;
  margin-top: 14px;
  color: var(--muted);
  line-height: 1.5;
}

.message.error {
  color: var(--danger);
}

.tips {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 22px;
}

.tips article {
  padding: 20px;
}

.tips h3 {
  margin-bottom: 8px;
}

.tips p {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.6;
}

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

  textarea {
    min-height: 360px;
  }
}

@media print {
  body {
    background: #fff;
  }

  .hero,
  .editor-panel,
  .tips,
  .output-actions,
  .message {
    display: none;
  }

  .shell {
    padding: 0;
  }

  .workspace,
  .output-panel {
    display: block;
    box-shadow: none;
    border: 0;
  }
}