*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #f0fdfa;
  --surface: #ffffff;
  --surface2: #f0fdfa;
  --border: #99f6e4;
  --accent: #0891b2;
  --accent2: #0e7490;
  --accent-light: #ecfeff;
  --text: #134e4a;
  --muted: #5eead4;
  --label: #0f766e;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

header {
  background: var(--accent);
  color: white;
  padding: 14px 20px;
  text-align: center;
}
header h1 { font-size: 22px; font-weight: 800; letter-spacing: -0.5px; }
header p { font-size: 13px; opacity: .85; margin-top: 2px; }

.container { max-width: 680px; margin: 0 auto; padding: 24px 16px 60px; }

/* TYPE TABS */
.type-tabs { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 20px; }
.type-tab {
  padding: 7px 14px; border-radius: 20px; border: 1.5px solid var(--border);
  background: var(--surface); font-size: 13px; font-weight: 600; cursor: pointer;
  color: var(--label); transition: all .15s;
}
.type-tab.active { background: var(--accent); color: white; border-color: var(--accent); }
.type-tab:hover:not(.active) { border-color: var(--accent); color: var(--accent); }

/* FORM */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 20px; margin-bottom: 16px; }
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 12px; font-weight: 700; color: var(--label); margin-bottom: 5px; text-transform: uppercase; letter-spacing: .04em; }
.field input, .field textarea, .field select {
  width: 100%; padding: 11px 14px; border: 1.5px solid var(--border);
  border-radius: 10px; font-size: 15px; background: var(--surface2); outline: none; font-family: inherit;
}
.field input:focus, .field textarea:focus, .field select:focus { border-color: var(--accent); background: white; }
.field textarea { resize: vertical; min-height: 80px; }
.half { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }

/* CUSTOMIZE */
.customize-row { display: flex; flex-wrap: wrap; gap: 16px; align-items: flex-end; margin-bottom: 4px; }
.color-field { display: flex; flex-direction: column; gap: 5px; }
.color-field label { font-size: 12px; font-weight: 700; color: var(--label); text-transform: uppercase; letter-spacing: .04em; }
.color-field input[type=color] { width: 48px; height: 38px; border: 1.5px solid var(--border); border-radius: 8px; cursor: pointer; padding: 2px; }
.size-field { display: flex; flex-direction: column; gap: 5px; }
.size-field label { font-size: 12px; font-weight: 700; color: var(--label); text-transform: uppercase; letter-spacing: .04em; }
.size-field select { padding: 8px 12px; border: 1.5px solid var(--border); border-radius: 8px; font-size: 14px; background: var(--surface2); outline: none; }
.size-field select:focus { border-color: var(--accent); }

.btn-generate {
  width: 100%; padding: 14px; background: var(--accent); color: white;
  border: none; border-radius: 12px; font-size: 16px; font-weight: 700; cursor: pointer; margin-top: 4px;
}
.btn-generate:hover { background: var(--accent2); }

/* QR OUTPUT */
.qr-output {
  display: none; text-align: center; background: var(--surface);
  border: 1px solid var(--border); border-radius: 16px; padding: 28px 20px;
  margin-bottom: 16px;
}
.qr-output.show { display: block; }
#qr-canvas { border-radius: 8px; max-width: 100%; }
.qr-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 16px; }
.btn-dl {
  padding: 12px; border-radius: 10px; font-size: 14px; font-weight: 700;
  cursor: pointer; border: 2px solid var(--border);
}
.btn-dl-png { background: var(--accent); color: white; border-color: var(--accent); }
.btn-dl-png:hover { background: var(--accent2); }
.btn-dl-copy { background: none; color: var(--label); }
.btn-dl-copy:hover { border-color: var(--accent); color: var(--accent); }

/* SEO CONTENT */
.content-section { margin-top: 32px; }
.content-section h2 { font-size: 17px; font-weight: 800; margin-bottom: 8px; color: var(--text); }
.content-section h3 { font-size: 14px; font-weight: 700; margin: 14px 0 6px; color: var(--label); }
.content-section p, .content-section li { font-size: 14px; color: #0f766e; line-height: 1.7; }
.content-section ul, .content-section ol { padding-left: 20px; margin-bottom: 10px; }
details { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 12px; margin-bottom: 8px; }
summary { font-weight: 700; font-size: 14px; cursor: pointer; color: var(--text); }
details p { font-size: 13px; color: #0f766e; margin-top: 8px; line-height: 1.6; }

footer { text-align: center; padding: 20px; font-size: 12px; color: #5eead4; }
footer a { color: var(--accent); text-decoration: none; }