:root {
  --bg-dark: #07090e;
  --bg-card: #111622;
  --bg-card-hover: #1a2235;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --accent-neon: #00f2fe;
  --accent-glow: rgba(0, 242, 254, 0.4);
  --accent-secondary: #4facfe;
  --border-color: rgba(255, 255, 255, 0.05);
  --font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

body.sunlight-mode {
  --bg-dark: #f0f4f8;
  --bg-card: #ffffff;
  --bg-card-hover: #e2e8f0;
  --text-main: #0f172a;
  --text-muted: #475569;
  --accent-neon: #2563eb; /* High visibility blue instead of neon cyan */
  --accent-glow: rgba(37, 99, 235, 0.3);
  --accent-secondary: #0284c7;
  --border-color: rgba(0, 0, 0, 0.1);
}

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

body {
  font-family: var(--font-family);
  background-color: var(--bg-dark);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.auth-container {
  width: 100%;
  max-width: 400px;
  background: rgba(17, 22, 34, 0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  box-shadow: 0 10px 40px rgba(0,0,0,0.5);
  transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.4s;
}
.auth-container:hover {
  transform: scale(1.02);
  box-shadow: 0 15px 50px var(--accent-glow);
}

.auth-header {
  text-align: center;
}

.auth-header h1 {
  font-size: 1.8rem;
  background: linear-gradient(to right, var(--accent-neon), var(--accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 0.5rem;
}

.auth-header p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Quick Join QR Button */
.qr-join-btn {
  background: linear-gradient(135deg, rgba(0, 242, 254, 0.1), rgba(79, 172, 254, 0.1));
  border: 1px solid var(--accent-glow);
  color: var(--accent-neon);
  width: 100%;
  padding: 1rem;
  border-radius: 16px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: all 0.3s ease;
}
.qr-join-btn:hover {
  background: linear-gradient(135deg, rgba(0, 242, 254, 0.2), rgba(79, 172, 254, 0.2));
  box-shadow: 0 0 15px var(--accent-glow);
}

.divider {
  display: flex;
  align-items: center;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.8rem;
}
.divider::before, .divider::after {
  content: '';
  flex: 1;
  border-bottom: 1px solid var(--border-color);
}
.divider:not(:empty)::before { margin-right: .5em; }
.divider:not(:empty)::after { margin-left: .5em; }

.sso-buttons {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.sso-btn {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.8rem;
  border-radius: 12px;
  font-size: 0.95rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  cursor: pointer;
  transition: background 0.2s;
}

.sso-btn:hover {
  background: rgba(255, 255, 255, 0.08);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

input {
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.8rem 1rem;
  border-radius: 12px;
  font-size: 1rem;
  outline: none;
}
input:focus {
  border-color: var(--accent-neon);
}

.submit-btn {
  background: linear-gradient(to right, var(--accent-neon), var(--accent-secondary));
  color: #000;
  font-weight: bold;
  border: none;
  padding: 0.8rem;
  border-radius: 12px;
  font-size: 1rem;
  cursor: pointer;
  transition: opacity 0.2s;
}
.submit-btn:hover {
  opacity: 0.9;
}

.remember-me {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}