:root {
  --bg-color: #0f172a;
  --bg-gradient: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  --panel-bg: rgba(30, 41, 59, 0.7);
  --panel-border: rgba(255, 255, 255, 0.1);
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --primary-color: #3b82f6;
  --primary-hover: #2563eb;
  --error-color: #ef4444;
  --error-bg: rgba(239, 68, 68, 0.1);
  --input-bg: rgba(15, 23, 42, 0.6);
  --input-border: rgba(255, 255, 255, 0.15);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Inter', sans-serif;
}

body {
  background: var(--bg-gradient);
  background-attachment: fixed;
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

/* Background animated orbs for premium feel */
body::before, body::after {
  content: '';
  position: absolute;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  filter: blur(80px);
  z-index: -1;
  animation: float 10s infinite ease-in-out alternate;
}

body::before {
  background: rgba(59, 130, 246, 0.3);
  top: -50px;
  left: -50px;
}

body::after {
  background: rgba(16, 185, 129, 0.2);
  bottom: -50px;
  right: -50px;
  animation-delay: -5s;
}

@keyframes float {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(30px, 30px) scale(1.1); }
}

.login-container {
  width: 100%;
  max-width: 420px;
  padding: 20px;
  z-index: 10;
}

.glass-panel {
  background: var(--panel-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--panel-border);
  border-radius: 20px;
  padding: 40px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  animation: slideUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  opacity: 0;
  transform: translateY(20px);
}

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

.login-header {
  text-align: center;
  margin-bottom: 35px;
}

.logo {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--primary-color), #60a5fa);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  color: white;
  margin: 0 auto 15px;
  box-shadow: 0 10px 25px -5px rgba(59, 130, 246, 0.5);
}

.login-header h2 {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 5px;
  letter-spacing: -0.5px;
}

.login-header p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.form-group {
  margin-bottom: 22px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.form-group label i {
  margin-right: 5px;
}

.form-group input {
  width: 100%;
  padding: 14px 16px;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: 12px;
  color: var(--text-main);
  font-size: 1rem;
  transition: all 0.2s ease;
  outline: none;
}

.form-group input:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.25);
}

.form-group input::placeholder {
  color: rgba(148, 163, 184, 0.5);
}

.btn-login {
  width: 100%;
  padding: 14px;
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: 12px;
  font-size: 1.05rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: 10px;
}

.btn-login:hover:not(:disabled) {
  background: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 10px 20px -10px rgba(59, 130, 246, 0.6);
}

.btn-login:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.error-message {
  background: var(--error-bg);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: var(--error-color);
  padding: 12px;
  border-radius: 10px;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
  animation: shake 0.5s cubic-bezier(0.36, 0.07, 0.19, 0.97) both;
}

@keyframes shake {
  10%, 90% { transform: translate3d(-1px, 0, 0); }
  20%, 80% { transform: translate3d(2px, 0, 0); }
  30%, 50%, 70% { transform: translate3d(-4px, 0, 0); }
  40%, 60% { transform: translate3d(4px, 0, 0); }
}