:root {
  --pink: #ff6b9d;
  --purple: #b44dff;
  --blue: #4d9fff;
  --cyan: #00d4aa;
  --bg: #ffffff;
  --bg-light: #f5f3ff;
  --text: #1a1a2e;
  --text-muted: #6b6b8a;
  --border: rgba(0, 0, 0, 0.08);
}

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

body {
  font-family: 'M PLUS Rounded 1c', sans-serif;
  background: var(--bg-light);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.auth-container {
  width: 100%;
  max-width: 420px;
  padding: 1.5rem;
}

.auth-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 2.5rem 2rem;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
}

.auth-brand {
  text-align: center;
  margin-bottom: 2rem;
}

.auth-brand a {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.auth-brand .dot {
  background: linear-gradient(135deg, var(--pink), var(--purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Tabs */
.auth-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 1.5rem;
  border-bottom: 2px solid var(--border);
}

.auth-tab {
  flex: 1;
  padding: 0.7rem;
  border: none;
  background: none;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-muted);
  cursor: pointer;
  transition: color 0.3s;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
}

.auth-tab.active {
  color: var(--purple);
  border-bottom-color: var(--purple);
}

/* Forms */
.auth-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.auth-form.hidden {
  display: none;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-muted);
}

.form-group input {
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--text);
  outline: none;
  transition: border-color 0.3s;
}

.form-group input:focus {
  border-color: var(--purple);
}

.auth-button {
  padding: 0.8rem;
  background: linear-gradient(135deg, var(--pink), var(--purple));
  color: white;
  border: none;
  border-radius: 10px;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 4px 16px rgba(196, 77, 255, 0.3);
  margin-top: 0.5rem;
}

.auth-button:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(196, 77, 255, 0.4);
}

.auth-button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* Divider */
.auth-divider {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 1.5rem 0;
}

.auth-divider::before,
.auth-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.auth-divider span {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Google Button */
.google-button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
}

.google-button:hover {
  background: var(--bg-light);
  border-color: rgba(0, 0, 0, 0.15);
}

/* Message */
.auth-message {
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  border-radius: 10px;
  font-size: 0.9rem;
  text-align: center;
}

.auth-message.hidden {
  display: none;
}

.auth-message.error {
  background: #fff0f0;
  color: #d32f2f;
  border: 1px solid #ffcdd2;
}

.auth-message.success {
  background: #f0fff4;
  color: #2e7d32;
  border: 1px solid #c8e6c9;
}