:root {
  --bg: #f1f5f9;
  --card: #ffffff;
  --ink: #0f172a;
  --muted: #64748b;
  --border: #e2e8f0;
  --border-strong: #cbd5e1;
  --orange: #f26522;
  --orange-2: #f97316;
  --blue: #2563eb;
  --blue-2: #3b82f6;
  --green: #16a34a;
  --amber: #d97706;
  --shadow: 0 8px 24px rgba(15, 23, 42, 0.06);
  --radius: 14px;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
}

/* ---------- Hero ---------- */
.hero { max-width: 820px; margin: 0 auto; padding: 44px 20px 8px; text-align: center; }
.hero h1 { font-size: 40px; line-height: 1.15; margin: 0 0 14px; letter-spacing: -1px; font-weight: 800; }
.accent-orange { color: var(--orange); }
.accent-blue { color: var(--blue); }
.hero-sub { color: var(--muted); font-size: 17px; max-width: 640px; margin: 0 auto; }

.badges { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-top: 20px; }
.badge {
  font-size: 13px; font-weight: 600; padding: 7px 13px; border-radius: 999px;
  background: #fff; border: 1px solid var(--border);
}
.badge.orange { color: var(--orange); }
.badge.green { color: var(--green); background: #f0fdf4; border-color: #bbf7d0; }
.badge.amber { color: var(--amber); background: #fffbeb; border-color: #fde68a; }
.badge.blue { color: var(--blue); background: #eff6ff; border-color: #bfdbfe; }

/* ---------- Layout ---------- */
.wrap { max-width: 840px; margin: 26px auto; padding: 0 20px; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 26px;
  margin-bottom: 22px;
}

.card-head { text-align: center; margin-bottom: 18px; }
.card-head h2 { margin: 0 0 4px; font-size: 20px; }
.card-head p { margin: 0; color: var(--muted); font-size: 14px; }

/* ---------- Tabs ---------- */
.tabs {
  display: grid; grid-template-columns: 1fr 1fr; gap: 6px;
  background: #f1f5f9; border: 1px solid var(--border);
  border-radius: 12px; padding: 6px; margin-bottom: 22px;
}
.tab {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px; border: none; background: transparent; cursor: pointer;
  border-radius: 8px; font-size: 14.5px; font-weight: 600; color: var(--muted);
  font-family: inherit; transition: all 0.15s;
}
.tab.active { background: #fff; color: var(--ink); box-shadow: 0 1px 3px rgba(0,0,0,0.08); }
.tab-ico { font-size: 15px; }

/* ---------- Content-type grid ---------- */
.section-label { font-size: 13px; font-weight: 700; color: var(--ink); margin: 0 0 12px; }
.section-label.center { text-align: center; }

.type-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; margin-bottom: 22px; }
@media (max-width: 640px) { .type-grid { grid-template-columns: repeat(3, 1fr); } }

.type-btn {
  display: flex; flex-direction: column; align-items: center; gap: 7px;
  padding: 14px 6px; border: 1px solid var(--border); border-radius: 12px;
  background: #fff; cursor: pointer; color: var(--muted); font-family: inherit;
  font-size: 12.5px; font-weight: 600; transition: all 0.15s;
}
.type-btn:hover { border-color: var(--border-strong); transform: translateY(-1px); }
.type-btn.active { border-color: var(--orange); color: var(--orange); background: #fff7ed; box-shadow: 0 0 0 1px var(--orange); }
.type-btn svg { width: 22px; height: 22px; stroke-width: 1.8; }

/* ---------- Two-column form/preview ---------- */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; }
@media (max-width: 720px) { .two-col { grid-template-columns: 1fr; } }
.col { display: flex; flex-direction: column; gap: 14px; }

.field { display: flex; flex-direction: column; gap: 7px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
label { font-size: 13px; font-weight: 600; color: var(--ink); }

input[type="text"], input[type="url"], input[type="number"], input[type="tel"],
input[type="email"], select, textarea {
  width: 100%; background: #fff; border: 1px solid var(--border-strong);
  color: var(--ink); border-radius: 10px; padding: 11px 12px; font-size: 14px;
  font-family: inherit; outline: none; transition: border-color 0.15s, box-shadow 0.15s;
}
textarea { resize: vertical; min-height: 92px; }
input:focus, select:focus, textarea:focus {
  border-color: var(--orange); box-shadow: 0 0 0 3px rgba(242, 101, 34, 0.15);
}

.hint { margin: 0; font-size: 12px; color: var(--muted); }
.hint.error { color: #dc2626; }

.color-row { display: flex; align-items: center; gap: 10px; }
input[type="color"] {
  width: 46px; height: 42px; padding: 0; border: 1px solid var(--border-strong);
  border-radius: 10px; background: #fff; cursor: pointer; flex: none;
}
.hex { max-width: 120px; text-transform: uppercase; }

.checks { justify-content: center; gap: 10px; }
.toggle { display: flex; align-items: center; gap: 9px; font-weight: 500; font-size: 13px; cursor: pointer; }
.toggle input { width: 16px; height: 16px; accent-color: var(--orange); }

input[type="range"] { width: 100%; accent-color: var(--orange); }
.range-ticks { display: flex; justify-content: space-between; font-size: 11px; color: var(--muted); }

/* ---------- Collapsible customize ---------- */
.collapse-toggle {
  display: flex; align-items: center; gap: 8px; background: none; border: none;
  color: var(--orange); font-weight: 600; font-size: 14px; cursor: pointer;
  padding: 6px 0; font-family: inherit;
}
.collapse-toggle .chev { transition: transform 0.15s; display: inline-block; }
.collapse-toggle[aria-expanded="true"] .chev { transform: rotate(90deg); }
.customize {
  display: flex; flex-direction: column; gap: 14px;
  padding: 16px; border: 1px solid var(--border); border-radius: 12px; background: #f8fafc;
}

.presets { display: flex; flex-wrap: wrap; gap: 8px; }
.preset-chip {
  display: flex; align-items: center; gap: 7px; padding: 6px 11px; border-radius: 999px;
  border: 1px solid var(--border-strong); background: #fff; color: var(--ink);
  font-size: 12px; cursor: pointer; font-family: inherit;
}
.preset-chip:hover { border-color: var(--orange); }
.preset-chip.active { border-color: var(--orange); box-shadow: 0 0 0 1px var(--orange); }
.swatch { width: 13px; height: 13px; border-radius: 4px; border: 1px solid rgba(0,0,0,0.1); }

.shorten-row { margin-top: 4px; }

/* ---------- Preview ---------- */
.preview-box { display: flex; flex-direction: column; gap: 10px; }
.preview-frame {
  width: 100%; aspect-ratio: 1/1; border-radius: 12px; border: 1px solid var(--border);
  background:
    linear-gradient(45deg, #eef2f7 25%, transparent 25%, transparent 75%, #eef2f7 75%) 0 0/22px 22px,
    linear-gradient(45deg, #eef2f7 25%, #f8fafc 25%, #f8fafc 75%, #eef2f7 75%) 11px 11px/22px 22px,
    #f8fafc;
  display: flex; align-items: center; justify-content: center; overflow: hidden;
}
.preview-frame img { max-width: 92%; max-height: 92%; display: none; border-radius: 4px; }
.preview-frame img.ready { display: block; }
.ph { display: flex; flex-direction: column; align-items: center; gap: 8px; color: #94a3b8; font-size: 13px; }
.ph.hidden { display: none; }
.ph-ico { font-size: 30px; opacity: 0.6; }
.status { margin: 0; text-align: center; font-size: 12.5px; color: var(--muted); min-height: 16px; }
.status.error { color: #dc2626; }

.format-row { display: flex; gap: 18px; justify-content: center; }
.fmt { display: flex; align-items: center; gap: 6px; font-size: 13px; font-weight: 600; color: var(--muted); cursor: pointer; }
.fmt input { accent-color: var(--orange); }

/* ---------- CTA ---------- */
.cta {
  width: 100%; margin-top: 22px; padding: 15px; border: none; border-radius: 11px;
  color: #fff; font-size: 15px; font-weight: 700; cursor: pointer; font-family: inherit;
  background: linear-gradient(135deg, var(--orange), var(--orange-2));
  display: flex; align-items: center; justify-content: center; gap: 9px;
  transition: transform 0.1s, opacity 0.15s;
}
.cta:hover:not(:disabled) { transform: translateY(-1px); }
.cta:disabled { opacity: 0.45; cursor: not-allowed; }
.cta.blue { background: linear-gradient(135deg, var(--blue), var(--blue-2)); }

/* ---------- Shortener result ---------- */
.short-result { margin-top: 18px; padding: 16px; border: 1px solid var(--border); border-radius: 12px; background: #f8fafc; }
.short-line { display: flex; gap: 8px; }
.short-line input { background: #fff; font-weight: 600; color: var(--blue); }
.short-meta { display: flex; align-items: center; gap: 16px; margin-top: 10px; font-size: 13px; color: var(--muted); }
.linkish { background: none; border: none; color: var(--blue); font-weight: 600; cursor: pointer; font-size: 13px; font-family: inherit; padding: 0; }
.ghost { padding: 10px 14px; background: #fff; color: var(--ink); border: 1px solid var(--border-strong); border-radius: 10px; cursor: pointer; font-family: inherit; font-weight: 600; font-size: 13px; }
.ghost:hover { border-color: var(--orange); }

/* ---------- Guides ---------- */
.guides h2 { margin: 0 0 16px; font-size: 19px; }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
@media (max-width: 640px) { .steps { grid-template-columns: 1fr; } }
.step { display: flex; gap: 12px; }
.step .num {
  flex: none; width: 30px; height: 30px; border-radius: 50%; background: #fff7ed; color: var(--orange);
  display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: 14px;
  border: 1px solid #fed7aa;
}
.step b { font-size: 14.5px; }
.step p { margin: 3px 0 0; font-size: 13px; color: var(--muted); }

.guide-detail {
  margin-top: 18px; padding-top: 16px; border-top: 1px dashed var(--border);
  font-size: 13.5px; color: var(--muted);
}
.guide-detail b { color: var(--ink); }
.guide-detail ol { margin: 8px 0 0; padding-left: 20px; }
.guide-detail li { margin-bottom: 5px; }

/* ---------- Footer ---------- */
.footer { text-align: center; color: var(--muted); font-size: 12px; padding: 8px 0 34px; }
.footer code { background: #eef2f7; padding: 2px 6px; border-radius: 6px; }