:root {
  --bg: #eef1f8;
  --card-bg: rgba(255, 255, 255, 0.25);
  --card-border: rgba(255, 255, 255, 0.45);
  --text: #0b1220;
  --muted: #64748b;
  --accent: #2563eb;
  --accent-2: #1e40af;
  --success: #16a34a;
  --danger: #ef4444;
  --shadow: rgba(0, 0, 0, 0.14);
  --sidebar-w: 260px;
  --sidebar-collapsed-w: 72px;
}

:root.dark {
  --bg: #0f1117;
  --card-bg: rgba(17, 19, 27, 0.65);
  --card-border: rgba(255, 255, 255, 0.06);
  --text: #e5eaff;
  --muted: #9aa3b3;
  --accent: #3b82f6;
  --accent-2: #1d4ed8;
  --shadow: rgba(0, 0, 0, 0.55);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

html, body {
  height: 100%;
}

body {
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
}

.text-muted {
  color: var(--muted);
  font-size: 13px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  font-size: 14px;
}

.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-2); }
.btn-ghost { background: transparent; color: var(--text); border: 1px solid rgba(11, 18, 32, 0.1); }
.btn-danger { background: var(--danger); color: #fff; }

.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 18px;
  box-shadow: 0 8px 24px var(--shadow);
}

.ui-center-container {
  width: 100%;
  max-width: 420px;
  margin: 0 auto;
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}

.ui-card {
  width: 100%;
  max-width: 420px;
  padding: 32px;
  border-radius: 16px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  backdrop-filter: blur(14px) saturate(140%);
  box-shadow: 0 8px 28px var(--shadow);
}

.ui-title {
  text-align: center;
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 6px;
}

.ui-subtitle {
  text-align: center;
  margin-bottom: 18px;
  font-size: 14px;
  color: var(--muted);
}

.ui-input-group {
  position: relative;
  margin-bottom: 18px;
}

.ui-input {
  width: 100%;
  padding: 12px 42px 12px 40px;
  border: 1px solid rgba(11, 18, 32, 0.06);
  border-radius: 10px;
  background: var(--card-bg);
  font-size: 15px;
  color: var(--text);
}

.ui-input::placeholder { color: var(--muted); }

.ui-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
}

.ui-icon-left {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--muted);
}

.ui-icon-right {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  cursor: pointer;
  color: var(--muted);
}

.ui-btn {
  width: 100%;
  padding: 12px;
  border-radius: 10px;
  border: none;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  font-size: 16px;
}

.ui-spinner {
  display: none;
  margin: 12px auto 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 4px solid rgba(37, 99, 235, 0.22);
  border-top-color: var(--accent);
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}