:root {
  --ink: #1c1033;
  --sub: #6b6480;
  --line: #e6e1f5;
  --bg: #f6f4fc;
  --accent: #4f46e5;
  --accent2: #7c3aed;
  --grad: linear-gradient(135deg, #4f46e5, #7c3aed);
  --ok: #16a34a;
  --err: #dc2626;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--ink);
  min-height: 100vh;
}

a { color: inherit; }

/* ── Navbar ── */
.navbar {
  padding: 1.1rem 1.5rem;
  background: #fff;
  border-bottom: 1px solid var(--line);
}
.brand {
  font-weight: 800;
  font-size: 1.25rem;
  text-decoration: none;
  color: var(--ink);
}
.brand span { color: var(--accent); }

/* ── Hero ── */
.hero {
  min-height: calc(100vh - 64px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2.5rem 1rem;
}
.hero-inner {
  max-width: 560px;
  width: 100%;
  text-align: center;
}
.badge {
  display: inline-block;
  font-size: .78rem;
  font-weight: 600;
  color: var(--accent);
  background: #ede9fe;
  padding: .35rem .9rem;
  border-radius: 30px;
  margin-bottom: 1.1rem;
}
h1 {
  font-size: 2.1rem;
  font-weight: 800;
  line-height: 1.25;
  margin: 0 0 .6rem;
}
.accent {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub {
  color: var(--sub);
  font-size: 1rem;
  margin: 0 0 1.75rem;
}

/* ── Tool card ── */
.tool-card {
  background: #fff;
  border-radius: 18px;
  box-shadow: 0 10px 40px rgba(79, 70, 229, .10);
  padding: 1.75rem;
  border: 1px solid var(--line);
}
.field-wrap { display: flex; gap: .5rem; }
.tool-input {
  flex: 1;
  padding: .8rem 1rem;
  border-radius: 12px;
  border: 1.5px solid var(--line);
  font-size: .95rem;
  outline: none;
}
.tool-input:focus { border-color: var(--accent); }
.tool-input.invalid { border-color: var(--err); }
.btn-shorten {
  background: var(--grad);
  color: #fff;
  border: none;
  border-radius: 12px;
  padding: 0 1.4rem;
  font-weight: 700;
  font-size: .95rem;
  cursor: pointer;
}
.btn-shorten:hover { opacity: .92; }

.custom-wrap {
  display: flex;
  align-items: center;
  border: 1.5px solid var(--line);
  border-radius: 12px;
  margin-top: .6rem;
  overflow: hidden;
}
.custom-prefix {
  background: var(--bg);
  color: var(--sub);
  font-size: .85rem;
  padding: .7rem .8rem;
  border-right: 1.5px solid var(--line);
  white-space: nowrap;
}
.custom-input {
  flex: 1;
  border: none;
  padding: .7rem .8rem;
  font-size: .9rem;
  outline: none;
}
.custom-input.invalid { background: #fef2f2; }

.hint {
  font-size: .75rem;
  color: var(--sub);
  margin: .6rem 0 0;
}
.error-msg {
  color: var(--err);
  font-size: .85rem;
  font-weight: 600;
  margin: .7rem 0 0;
}

/* ── Result ── */
.success-label {
  color: var(--ok);
  font-weight: 700;
  font-size: .9rem;
  margin: 0 0 1rem;
}
.result-row { display: flex; gap: .5rem; }
.result-input {
  flex: 1;
  padding: .8rem 1rem;
  border-radius: 12px;
  border: 1.5px solid var(--line);
  font-size: .95rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--bg);
}
.btn-copy {
  background: var(--grad);
  color: #fff;
  border: none;
  border-radius: 12px;
  padding: 0 1.3rem;
  font-weight: 700;
  cursor: pointer;
}
.btn-again {
  display: inline-block;
  margin-top: 1.1rem;
  font-size: .88rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
}
.btn-again:hover { text-decoration: underline; }

.site-footer {
  text-align: center;
  color: var(--sub);
  font-size: .78rem;
  padding: 1.5rem 1rem;
}

/* ── SEO content block ── */
.seo-block {
  text-align: left;
  margin-top: 2.5rem;
  padding-top: 1rem;
}
.seo-block h2 {
  font-size: 1.15rem;
  font-weight: 800;
  margin: 1.8rem 0 .7rem;
  color: var(--ink);
}
.seo-block h2:first-child { margin-top: 0; }
.seo-block p {
  color: var(--sub);
  font-size: .92rem;
  line-height: 1.7;
  margin: 0 0 .8rem;
}
.seo-list {
  color: var(--sub);
  font-size: .92rem;
  line-height: 1.8;
  padding-left: 1.3rem;
  margin: 0 0 .8rem;
}
.seo-list li { margin-bottom: .4rem; }
.seo-list strong { color: var(--ink); }
.seo-block code {
  background: #ede9fe;
  color: var(--accent);
  padding: .1rem .4rem;
  border-radius: 6px;
  font-size: .85em;
}
.faq-item {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1rem 1.2rem;
  margin-bottom: .8rem;
}
.faq-item h3 {
  font-size: .95rem;
  font-weight: 700;
  margin: 0 0 .35rem;
  color: var(--ink);
}
.faq-item p {
  font-size: .87rem;
  margin: 0;
  color: var(--sub);
  line-height: 1.6;
}

/* ══════════════════════════════════════════════
   INTERSTITIAL / GO PAGE
   ══════════════════════════════════════════════ */
.go-page { min-height: 100vh; display: flex; flex-direction: column; background: var(--bg); }
.go-nav {
  background: #fff;
  border-bottom: 1px solid var(--line);
  padding: .7rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.go-brand { font-weight: 800; text-decoration: none; color: var(--ink); font-size: 1.1rem; }
.go-brand span { color: var(--accent); }
.go-nav-right { font-size: .8rem; color: var(--sub); }

.go-main { flex: 1; display: flex; align-items: center; justify-content: center; padding: 2rem 1rem; }
.go-card {
  background: #fff;
  border-radius: 20px;
  box-shadow: 0 10px 40px rgba(79, 70, 229, .12);
  padding: 2.25rem 2rem;
  max-width: 480px;
  width: 100%;
  text-align: center;
  border: 1px solid var(--line);
}
.go-shield {
  width: 60px; height: 60px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 1.1rem;
  background: #ede9fe;
}
.go-title { font-size: 1.25rem; font-weight: 800; margin: 0 0 .4rem; }
.go-sub { color: var(--sub); font-size: .88rem; line-height: 1.5; }

.dest-card {
  background: var(--bg);
  border: 1.5px solid var(--line);
  border-radius: 14px;
  padding: 1rem 1.2rem;
  margin: 1.1rem 0;
  text-align: left;
}
.dest-label { font-size: .68rem; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; color: var(--sub); margin-bottom: .25rem; }
.dest-host { font-size: 1rem; font-weight: 700; word-break: break-all; }
.dest-url { font-size: .76rem; color: var(--sub); word-break: break-all; margin-top: .2rem; font-family: 'Courier New', monospace; }
.dest-secure { display: inline-flex; align-items: center; gap: .25rem; font-size: .7rem; font-weight: 600; padding: .2rem .55rem; border-radius: 20px; margin-top: .5rem; }
.dest-secure.https { background: #dcfce7; color: #166534; }
.dest-secure.http { background: #fef9c3; color: #713f12; }

.ad-slot {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 250px;
  margin: 1.2rem 0;
  overflow: hidden;
}

.countdown-wrap { position: relative; width: 80px; height: 80px; margin: 1.2rem auto .5rem; }
.countdown-ring { transform: rotate(-90deg); }
.countdown-ring-bg { fill: none; stroke: var(--line); stroke-width: 6; }
.countdown-ring-bar {
  fill: none;
  stroke: var(--accent);
  stroke-width: 6;
  stroke-linecap: round;
  stroke-dasharray: 201;
  stroke-dashoffset: 0;
  transition: stroke-dashoffset 1s linear;
}
.countdown-num {
  position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem; font-weight: 800; color: var(--accent);
}

.btn-go-now {
  display: block;
  background: var(--grad);
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  font-size: .92rem;
  padding: .8rem 1rem;
  border-radius: 12px;
  margin-top: 1.2rem;
}
.btn-go-now:hover { opacity: .92; }

.go-actions { margin-top: .8rem; }
.btn-go-sec { font-size: .82rem; color: var(--sub); text-decoration: none; font-weight: 600; }
.btn-go-sec:hover { text-decoration: underline; }

.nojs-warn {
  background: #fef9c3;
  border: 1px solid #fcd34d;
  border-radius: 10px;
  padding: .7rem 1rem;
  font-size: .82rem;
  color: #713f12;
  margin-top: 1rem;
}

.go-notice { font-size: .74rem; color: #9ca3af; margin-top: 1.3rem; line-height: 1.5; }
.go-footer { text-align: center; color: var(--sub); font-size: .76rem; padding: 1rem; border-top: 1px solid var(--line); background: #fff; }

@media (max-width: 480px) {
  h1 { font-size: 1.6rem; }
  .tool-card { padding: 1.25rem; }
  .field-wrap { flex-direction: column; }
  .btn-shorten { padding: .8rem; }
  .go-card { padding: 1.75rem 1.4rem; }
}