:root {
  color-scheme: light dark;
  --bg: #f4f7fb;
  --surface: rgba(255, 255, 255, 0.86);
  --surface-strong: #ffffff;
  --text: #111827;
  --muted: #64748b;
  --faint: #94a3b8;
  --border: #dbe3ee;
  --border-strong: #c7d2e0;
  --accent: #3157d5;
  --accent-hover: #2648bb;
  --accent-soft: #e9efff;
  --success: #138a61;
  --success-soft: #e5f7ef;
  --danger: #c53b4a;
  --shadow: 0 24px 70px rgba(24, 39, 75, 0.11);
  --radius-lg: 22px;
  --radius-md: 13px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1019;
    --surface: rgba(17, 24, 39, 0.88);
    --surface-strong: #151d2a;
    --text: #eef3fb;
    --muted: #9aa8bc;
    --faint: #728198;
    --border: #273244;
    --border-strong: #38465b;
    --accent: #7696ff;
    --accent-hover: #91aaff;
    --accent-soft: #1b2b59;
    --success: #57d5a4;
    --success-soft: #123a30;
    --danger: #ff8390;
    --shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
  }
}

* { box-sizing: border-box; }

html { min-width: 320px; }

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  color: var(--text);
  background:
    radial-gradient(circle at 20% 0%, color-mix(in srgb, var(--accent) 11%, transparent), transparent 34rem),
    var(--bg);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 1rem;
  line-height: 1.5;
}

button, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }

.page-shell {
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  width: min(100% - 2rem, 1040px);
  margin: 0 auto;
}

.topbar {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--text);
  font-weight: 720;
  text-decoration: none;
  letter-spacing: -0.02em;
}

.brand-mark {
  width: 2rem;
  height: 2rem;
  display: grid;
  place-items: center;
  color: white;
  border-radius: 10px;
  background: linear-gradient(145deg, #5378f1, #2749ba);
  box-shadow: 0 8px 18px rgba(49, 87, 213, 0.25);
}

.brand-mark svg { width: 1.15rem; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; }

main {
  display: grid;
  place-items: center;
  padding: 3rem 0 5rem;
}

.auth-panel,
.workspace { width: min(100%, 780px); }

.auth-panel {
  max-width: 520px;
  padding: clamp(1.5rem, 5vw, 3rem);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.eyebrow {
  margin-bottom: 0.65rem;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 760;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.eyebrow.success { color: var(--success); }

h1, h2, p { margin-top: 0; }
h1 {
  margin-bottom: 0.65rem;
  font-size: clamp(2.3rem, 8vw, 4.7rem);
  line-height: 0.98;
  letter-spacing: -0.06em;
}

.auth-panel h1 { font-size: clamp(2rem, 7vw, 3.2rem); }
.auth-panel > p, .intro p { color: var(--muted); font-size: 1.05rem; }

.auth-panel form { margin-top: 2rem; }
label { display: block; margin-bottom: 0.55rem; font-size: 0.9rem; font-weight: 680; }

.input-row, .url-control { display: flex; gap: 0.7rem; }

input {
  width: 100%;
  min-width: 0;
  height: 3.25rem;
  padding: 0 1rem;
  color: var(--text);
  background: var(--surface-strong);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  outline: none;
  transition: border-color 150ms ease, box-shadow 150ms ease;
}

input::placeholder { color: var(--faint); }
input:focus { border-color: var(--accent); box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 18%, transparent); }

.primary-button, .secondary-button, .text-button {
  border: 0;
  cursor: pointer;
  font-weight: 720;
}

.primary-button {
  min-height: 3.25rem;
  padding: 0 1.35rem;
  color: white;
  white-space: nowrap;
  background: var(--accent);
  border-radius: var(--radius-md);
  box-shadow: 0 8px 20px color-mix(in srgb, var(--accent) 24%, transparent);
  transition: transform 150ms ease, background 150ms ease;
}

.primary-button:hover { background: var(--accent-hover); transform: translateY(-1px); }
.primary-button:disabled { cursor: wait; opacity: 0.74; transform: none; }

.text-button { padding: 0.55rem 0.75rem; color: var(--muted); background: transparent; border-radius: 9px; }
.text-button:hover { color: var(--text); background: var(--surface); }

.intro { margin-bottom: 2rem; }

.cleaner-card,
.result-panel {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.cleaner-card { padding: clamp(1.25rem, 4vw, 2rem); }
.url-control input { height: 3.65rem; font-size: 1.02rem; }
.url-control .primary-button { min-height: 3.65rem; }

.form-meta {
  display: flex;
  gap: 1rem;
  margin-top: 0.7rem;
  color: var(--faint);
  font-size: 0.8rem;
}

.form-meta span + span::before { content: "·"; margin-right: 1rem; }

.error-message {
  min-height: 1.5rem;
  margin: 0.7rem 0 -0.25rem;
  color: var(--danger);
  font-size: 0.9rem;
  font-weight: 620;
}

.result-panel { margin-top: 1rem; padding: clamp(1.25rem, 4vw, 2rem); }
.result-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 1rem; }
.result-heading h2 { margin-bottom: 1rem; font-size: 1.4rem; letter-spacing: -0.03em; }

.hop-badge {
  padding: 0.35rem 0.65rem;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 680;
  border: 1px solid var(--border);
  border-radius: 999px;
}

.clean-result {
  padding: 1.15rem;
  background: var(--accent-soft);
  border: 1px solid color-mix(in srgb, var(--accent) 22%, var(--border));
  border-radius: var(--radius-md);
}

#clean-url {
  display: block;
  margin-bottom: 1rem;
  color: var(--accent);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: clamp(1rem, 2.5vw, 1.22rem);
  font-weight: 700;
  line-height: 1.5;
  overflow-wrap: anywhere;
  text-decoration: none;
}

#clean-url:hover { text-decoration: underline; }
.result-actions { display: flex; gap: 0.55rem; }

.secondary-button {
  min-height: 2.55rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0 0.9rem;
  color: var(--text);
  text-decoration: none;
  background: var(--surface-strong);
  border: 1px solid var(--border-strong);
  border-radius: 10px;
}

.secondary-button:hover { border-color: var(--accent); }
.secondary-button svg { width: 1rem; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

.link-details { margin-top: 1rem; color: var(--muted); }
.link-details summary { cursor: pointer; font-size: 0.9rem; font-weight: 680; }
.link-details dl { margin: 1rem 0 0; }
.link-details dl div { display: grid; grid-template-columns: 6rem 1fr; gap: 1rem; padding: 0.7rem 0; border-top: 1px solid var(--border); }
.link-details dt { font-size: 0.78rem; font-weight: 760; text-transform: uppercase; letter-spacing: 0.06em; }
.link-details dd { margin: 0; color: var(--text); font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.84rem; overflow-wrap: anywhere; }

.button-spinner { display: none; width: 1rem; height: 1rem; border: 2px solid rgba(255,255,255,.45); border-top-color: white; border-radius: 50%; animation: spin 700ms linear infinite; }
.is-loading .button-label { display: none; }
.is-loading .button-spinner { display: inline-block; }
@keyframes spin { to { transform: rotate(360deg); } }

footer {
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  color: var(--faint);
  font-size: 0.8rem;
  text-align: center;
}

.privacy-dot { width: 0.45rem; height: 0.45rem; border-radius: 50%; background: var(--success); box-shadow: 0 0 0 4px var(--success-soft); }
.hidden { display: none !important; }

@media (max-width: 640px) {
  .page-shell { width: min(100% - 1.25rem, 1040px); }
  .topbar { min-height: 64px; }
  main { align-items: start; padding: 2.5rem 0 3rem; }
  h1 { font-size: 3.3rem; }
  .input-row, .url-control { flex-direction: column; }
  .primary-button { width: 100%; }
  .form-meta { flex-wrap: wrap; gap: 0.35rem 0.75rem; }
  .form-meta span + span::before { margin-right: 0.75rem; }
  .result-heading { align-items: center; }
  .link-details dl div { grid-template-columns: 1fr; gap: 0.25rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}