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

:root {
  --dark: #0f172a;
  --darker: #1a2a4e;
  --blue: #3b82f6;
  --pink: #ec4899;
  --white: #ffffff;
  --light: #f0f4f8;
  --transition: all 0.3s ease;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: linear-gradient(135deg, var(--dark) 0%, var(--darker) 100%);
  min-height: 100vh;
  color: var(--white);
}

/* Top bar */
.auth-topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.auth-topbar-brand {
  font-weight: 700;
  color: var(--white);
  font-size: 1.1rem;
  letter-spacing: 1px;
  text-decoration: none;
}

.auth-topbar-back {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9rem;
  text-decoration: none;
  transition: var(--transition);
}

.auth-topbar-back:hover {
  color: var(--white);
}

/* Auth background and card */
.auth-bg {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 5rem 1rem 2rem;
}

.auth-card {
  width: 100%;
  max-width: 420px;
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 16px;
  padding: 2.5rem 2rem;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.4);
}

/* Brand section */
.auth-brand {
  text-align: center;
  margin-bottom: 2rem;
}

.auth-wordmark {
  display: block;
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -1px;
  background: linear-gradient(135deg, var(--blue) 0%, var(--pink) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.25rem;
}

.auth-tagline {
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.5px;
}

/* Flash messages */
.auth-notice {
  background: rgba(59, 130, 246, 0.15);
  border: 1px solid rgba(59, 130, 246, 0.4);
  color: #93c5fd;
  border-radius: 8px;
  padding: 0.75rem 1rem;
  margin-bottom: 1.25rem;
  font-size: 0.9rem;
}

.auth-alert {
  background: rgba(236, 72, 153, 0.15);
  border: 1px solid rgba(236, 72, 153, 0.4);
  color: #f9a8d4;
  border-radius: 8px;
  padding: 0.75rem 1rem;
  margin-bottom: 1.25rem;
  font-size: 0.9rem;
}

/* Page title */
.auth-page-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 1.5rem;
  text-align: center;
}

/* Form fields */
.auth-field {
  margin-bottom: 1.25rem;
}

.auth-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 0.5rem;
}

.auth-input {
  width: 100%;
  padding: 0.7rem 0.9rem;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 8px;
  color: var(--white);
  font-size: 0.95rem;
  transition: var(--transition);
  outline: none;
}

.auth-input::placeholder {
  color: rgba(255, 255, 255, 0.3);
}

.auth-input:focus {
  border-color: var(--blue);
  background: rgba(59, 130, 246, 0.08);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.auth-input.is-invalid {
  border-color: var(--pink);
  box-shadow: 0 0 0 3px rgba(236, 72, 153, 0.15);
}

/* Buttons */
.auth-btn {
  display: block;
  width: 100%;
  padding: 0.75rem 1rem;
  border: none;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
  text-decoration: none;
}

.auth-btn-primary {
  background: linear-gradient(135deg, var(--blue) 0%, var(--pink) 100%);
  color: var(--white);
}

.auth-btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(59, 130, 246, 0.45);
}

.auth-btn-neutral {
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.auth-btn-neutral:hover {
  background: rgba(255, 255, 255, 0.12);
}

.auth-btn-danger {
  background: rgba(236, 72, 153, 0.2);
  color: #f9a8d4;
  border: 1px solid rgba(236, 72, 153, 0.4);
}

.auth-btn-danger:hover {
  background: rgba(236, 72, 153, 0.3);
}

/* Checkbox group */
.auth-check-group {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.auth-check-group input[type="checkbox"] {
  width: 1rem;
  height: 1rem;
  accent-color: var(--blue);
  cursor: pointer;
}

/* Footer links */
.auth-footer {
  margin-top: 1.5rem;
  text-align: center;
}

.auth-footer ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.auth-footer a {
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.85rem;
  text-decoration: none;
  transition: var(--transition);
}

.auth-footer a:hover {
  color: var(--blue);
}