@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  --bg-color: #0f172a;
  --bg-gradient: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  --card-bg: rgba(30, 41, 59, 0.7);
  --card-border: rgba(255, 255, 255, 0.1);
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --accent-primary: #3b82f6;
  --accent-hover: #2563eb;
  --accent-glow: rgba(59, 130, 246, 0.5);
  --success: #10b981;
  --error: #ef4444;
}

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

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg-gradient);
  background-attachment: fixed;
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

body::before {
  content: '';
  position: absolute;
  top: -150px;
  left: -150px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  z-index: -1;
  border-radius: 50%;
  animation: float 12s ease-in-out infinite;
}

body::after {
  content: '';
  position: absolute;
  bottom: -150px;
  right: -150px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(167, 139, 250, 0.3) 0%, transparent 70%);
  z-index: -1;
  border-radius: 50%;
  animation: floatReverse 15s ease-in-out infinite;
}

@keyframes float {
  0% { transform: translate(0, 0); }
  50% { transform: translate(80px, 80px); }
  100% { transform: translate(0, 0); }
}

@keyframes floatReverse {
  0% { transform: translate(0, 0); }
  50% { transform: translate(-60px, -60px); }
  100% { transform: translate(0, 0); }
}

.container {
  width: 100%;
  max-width: 500px;
  padding: 2rem;
  z-index: 1;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  padding: 2.5rem;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  animation: slideUp 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.header h1 {
  font-size: 2.25rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, #60a5fa, #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.02em;
}

.header p {
  color: var(--text-muted);
  font-size: 1.05rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 0.875rem 1.5rem;
  font-size: 1.05rem;
  font-weight: 600;
  color: #fff;
  background-color: var(--accent-primary);
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  text-decoration: none;
  box-shadow: 0 4px 14px 0 rgba(59, 130, 246, 0.39);
}

.btn:hover {
  background-color: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
}

.btn:active {
  transform: translateY(0);
}

.btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

.btn-google {
  background-color: #ffffff;
  color: #1f2937;
  box-shadow: 0 4px 14px 0 rgba(0, 0, 0, 0.1);
}
.btn-google:hover {
  background-color: #f8fafc;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.status-box {
  margin-top: 1.5rem;
  padding: 1.5rem;
  border-radius: 16px;
  background: rgba(15, 23, 42, 0.4);
  border: 1px solid var(--card-border);
  transition: all 0.3s ease;
}

.status-box h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.text-muted { color: var(--text-muted); }

.progress-bar {
  width: 100%;
  height: 10px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 5px;
  overflow: hidden;
  margin-top: 1rem;
  position: relative;
  box-shadow: inset 0 1px 2px rgba(0,0,0,0.2);
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-primary), #a78bfa);
  width: 0%;
  transition: width 0.4s ease, background 0.4s ease;
  border-radius: 5px;
}

.hidden { display: none !important; }
.text-center { text-align: center; }
.mt-4 { margin-top: 1rem; }
.mb-4 { margin-bottom: 1rem; }
.pt-4 { padding-top: 1rem; }