:root {
  --black: #000000;
  --white: #ffffff;
  --gray-50: #fafafa;
  --gray-100: #f4f4f5;
  --gray-200: #e4e4e7;
  --gray-300: #d4d4d8;
  --gray-400: #a1a1aa;
  --gray-500: #71717a;
  --gray-600: #52525b;
  --gray-700: #3f3f46;
  --gray-800: #27272a;
  --gray-900: #18181b;
  --green: #0a7d3c;
  --red: #d4183d;
  --radius: 10px;
  --radius-lg: 14px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.08);
  --font: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

body {
  font-family: var(--font);
  background: var(--white);
  color: var(--black);
  -webkit-font-smoothing: antialiased;
  line-height: 1.5;
}

/* ── Animations ────────────────────────────────────────────── */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.96); }
  to { opacity: 1; transform: scale(1); }
}
.fade-in-up { animation: fadeInUp 0.5s cubic-bezier(0.16, 1, 0.3, 1); }
.fade-in { animation: fadeIn 0.4s ease; }
.scale-in { animation: scaleIn 0.25s cubic-bezier(0.16, 1, 0.3, 1); }

/* ── Auth pages (login / setup) ───────────────────────────── */
.auth-body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--white);
  background-image: radial-gradient(circle at 1px 1px, var(--gray-200) 1px, transparent 0);
  background-size: 24px 24px;
  padding: 24px;
}
.auth-card {
  width: 100%;
  max-width: 380px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  box-shadow: var(--shadow-lg);
}
.auth-logo {
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  margin-bottom: 20px;
}
.auth-title { font-size: 22px; font-weight: 600; letter-spacing: -0.02em; margin-bottom: 4px; }
.auth-subtitle { font-size: 14px; color: var(--gray-500); margin-bottom: 24px; }
.auth-form { display: flex; flex-direction: column; gap: 10px; }
.auth-form input {
  font-family: var(--font);
  font-size: 14px;
  padding: 11px 14px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
  background: var(--white);
}
.auth-form input:focus {
  border-color: var(--black);
  box-shadow: 0 0 0 3px rgba(0,0,0,0.06);
}
.auth-form button {
  font-family: var(--font);
  font-size: 14px;
  font-weight: 500;
  padding: 11px 14px;
  background: var(--black);
  color: var(--white);
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: opacity 0.15s ease, transform 0.1s ease;
  margin-top: 6px;
}
.auth-form button:hover { opacity: 0.85; }
.auth-form button:active { transform: scale(0.98); }
.auth-error {
  font-size: 13px;
  color: var(--red);
  background: #fef2f2;
  border: 1px solid #fecaca;
  padding: 10px 12px;
  border-radius: var(--radius);
  margin-bottom: 16px;
}
.auth-error.locked { color: var(--gray-700); background: var(--gray-50); border-color: var(--gray-200); }
.attempts-left { color: var(--gray-500); font-size: 12px; }

/* ── App shell ─────────────────────────────────────────────── */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 32px;
  border-bottom: 1px solid var(--gray-200);
  position: sticky;
  top: 0;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(10px);
  z-index: 50;
}
.topbar-brand { display: flex; align-items: center; gap: 10px; font-weight: 600; font-size: 15px; letter-spacing: -0.01em; }
.topbar-brand svg { display: block; }
.topbar-user { display: flex; align-items: center; gap: 14px; font-size: 13px; color: var(--gray-500); }
.logout-link {
  color: var(--gray-500);
  text-decoration: none;
  padding: 6px 12px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  transition: all 0.15s ease;
}
.logout-link:hover { color: var(--black); border-color: var(--gray-400); }

.container { max-width: 920px; margin: 0 auto; padding: 48px 24px 100px; }

.section { margin-bottom: 64px; }
.section-header { margin-bottom: 24px; }
.section-title { font-size: 20px; font-weight: 600; letter-spacing: -0.02em; margin-bottom: 4px; }
.section-subtitle { font-size: 14px; color: var(--gray-500); }

/* ── Shorten form ──────────────────────────────────────────── */
.shorten-card {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
}
.shorten-row { display: flex; gap: 10px; margin-bottom: 12px; }
.shorten-row input[type="url"] {
  flex: 1;
  font-family: var(--font);
  font-size: 14px;
  padding: 13px 16px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.shorten-row input[type="url"]:focus {
  border-color: var(--black);
  box-shadow: 0 0 0 3px rgba(0,0,0,0.06);
}
.shorten-row button {
  font-family: var(--font);
  font-size: 14px;
  font-weight: 500;
  padding: 13px 22px;
  background: var(--black);
  color: var(--white);
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  white-space: nowrap;
  transition: opacity 0.15s ease, transform 0.1s ease;
}
.shorten-row button:hover { opacity: 0.85; }
.shorten-row button:active { transform: scale(0.98); }
.shorten-row button:disabled { opacity: 0.5; cursor: not-allowed; }
.alias-row { display: flex; align-items: center; gap: 8px; }
.alias-row label { font-size: 13px; color: var(--gray-500); white-space: nowrap; }
.alias-row .alias-prefix { font-size: 13px; color: var(--gray-400); }
.alias-row input[type="text"] {
  font-family: var(--font);
  font-size: 13px;
  padding: 8px 10px;
  border: 1px solid var(--gray-300);
  border-radius: 8px;
  outline: none;
  width: 160px;
}
.alias-row input[type="text"]:focus { border-color: var(--black); }

.result-toast {
  display: none;
  margin-top: 16px;
  padding: 14px 16px;
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.result-toast.show { display: flex; }
.result-toast .short-link {
  font-family: "SF Mono", Menlo, Consolas, monospace;
  font-size: 14px;
  font-weight: 500;
  color: var(--black);
  cursor: pointer;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.copy-badge {
  font-size: 12px;
  color: var(--gray-500);
  background: var(--white);
  border: 1px solid var(--gray-200);
  padding: 5px 10px;
  border-radius: 6px;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s ease;
}
.copy-badge:hover { border-color: var(--gray-400); color: var(--black); }
.copy-badge.copied { color: var(--green); border-color: var(--green); }

/* ── Links list ────────────────────────────────────────────── */
.links-list { display: flex; flex-direction: column; gap: 10px; }
.link-row {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  transition: border-color 0.15s ease;
}
.link-row:hover { border-color: var(--gray-300); }
.link-row.disabled { opacity: 0.5; }
.link-main { flex: 1; min-width: 0; }
.link-short {
  font-family: "SF Mono", Menlo, Consolas, monospace;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  display: inline-block;
}
.link-original {
  font-size: 13px;
  color: var(--gray-500);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin-top: 2px;
}
.link-clicks {
  font-size: 13px;
  color: var(--gray-500);
  white-space: nowrap;
  min-width: 70px;
  text-align: right;
}
.link-actions { display: flex; align-items: center; gap: 6px; }
.icon-btn {
  width: 30px; height: 30px;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  background: var(--white);
  cursor: pointer;
  transition: all 0.15s ease;
  color: var(--gray-600);
}
.icon-btn:hover { border-color: var(--gray-400); color: var(--black); }
.icon-btn.danger:hover { border-color: var(--red); color: var(--red); }
.toggle-switch {
  width: 34px; height: 20px;
  border-radius: 20px;
  background: var(--gray-200);
  position: relative;
  cursor: pointer;
  transition: background 0.2s ease;
  border: none;
  flex-shrink: 0;
}
.toggle-switch.active { background: var(--black); }
.toggle-switch::after {
  content: '';
  position: absolute;
  top: 2px; left: 2px;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--white);
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}
.toggle-switch.active::after { transform: translateX(14px); }

.empty-state {
  text-align: center;
  padding: 48px 20px;
  color: var(--gray-400);
  font-size: 14px;
  border: 1px dashed var(--gray-200);
  border-radius: var(--radius);
}

/* ── Analytics ─────────────────────────────────────────────── */
.analytics-controls {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}
.analytics-controls select,
.analytics-controls input[type="date"] {
  font-family: var(--font);
  font-size: 13px;
  padding: 8px 12px;
  border: 1px solid var(--gray-300);
  border-radius: 8px;
  background: var(--white);
  color: var(--black);
  outline: none;
}
.analytics-controls select:focus,
.analytics-controls input[type="date"]:focus { border-color: var(--black); }
.date-sep { color: var(--gray-400); font-size: 13px; }

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}
.stat-card {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 18px 20px;
}
.stat-label { font-size: 12px; color: var(--gray-500); margin-bottom: 6px; }
.stat-value { font-size: 26px; font-weight: 600; letter-spacing: -0.02em; }

.chart-card {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 20px;
}
.chart-card-title { font-size: 13px; font-weight: 500; color: var(--gray-600); margin-bottom: 16px; }
.chart-wrap { width: 100%; height: 220px; }

.breakdown-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
@media (max-width: 640px) {
  .breakdown-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
}

.device-row, .referrer-row {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  padding: 8px 0;
}
.device-row .label, .referrer-row .label {
  width: 90px;
  color: var(--gray-600);
  flex-shrink: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.bar-track {
  flex: 1;
  height: 6px;
  background: var(--gray-100);
  border-radius: 4px;
  overflow: hidden;
}
.bar-fill {
  height: 100%;
  background: var(--black);
  border-radius: 4px;
  transition: width 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}
.bar-count { width: 34px; text-align: right; color: var(--gray-500); flex-shrink: 0; }

.skeleton {
  background: linear-gradient(90deg, var(--gray-100) 25%, var(--gray-200) 50%, var(--gray-100) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.4s ease infinite;
  border-radius: 6px;
}
@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

::selection { background: var(--black); color: var(--white); }