:root {
  color-scheme: dark;
  --bg: #0a0a0a;
  --bg-elevated: #141414;
  --bg-input: #1a1a1a;
  --border: #2a2a2a;
  --border-focus: #3a3a3a;
  --text: #fafafa;
  --text-muted: #888888;
  --text-subtle: #666666;
  --accent: #ffffff;
  --accent-hover: #e0e0e0;
  --error: #ff4444;
  --success: #22c55e;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

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

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 24px;
}

.login-container {
  width: 100%;
  max-width: 380px;
  text-align: center;
}

.login-title {
  font-size: 24px;
  font-weight: 500;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
  color: var(--text);
}

.login-subtitle {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 32px;
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.login-input {
  width: 100%;
  padding: 14px 18px;
  font-size: 15px;
  font-family: inherit;
  color: var(--text);
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 10px;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.login-input::placeholder {
  color: var(--text-subtle);
}

.login-input:hover {
  border-color: var(--border-focus);
}

.login-input:focus {
  border-color: var(--text-muted);
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.05);
}

.login-button {
  width: 100%;
  padding: 14px 18px;
  font-size: 15px;
  font-weight: 500;
  font-family: inherit;
  color: var(--bg);
  background: var(--accent);
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.1s ease;
}

.login-button:hover {
  background: var(--accent-hover);
}

.login-button:active {
  transform: scale(0.98);
}

.login-button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.login-link-button {
  display: inline-block;
  text-decoration: none;
  text-align: center;
}

.login-notice {
  padding: 12px 16px;
  border-radius: 10px;
  font-size: 14px;
  text-align: left;
  animation: slideIn 0.2s ease;
  margin-bottom: 16px;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.login-notice-error {
  background: rgba(255, 68, 68, 0.1);
  border: 1px solid rgba(255, 68, 68, 0.2);
  color: #ff6666;
}

.login-notice-success {
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.2);
  color: #4ade80;
}

.login-notice-info {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  color: var(--text-muted);
}

.login-session {
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: center;
}

.login-session-email {
  font-size: 16px;
  color: var(--text-muted);
}

.login-session-email strong {
  color: var(--text);
  font-weight: 500;
}