/* ============================================
   4Geeks AI Convergence — Login Page
   ============================================ */

.login-body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-deep);
  position: relative;
  overflow: hidden;
}

/* ── Particle Background ── */
.login-particles {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}
.login-particles canvas {
  display: block;
  width: 100%;
  height: 100%;
}

/* ── Noise ── */
.noise-overlay {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px 256px;
}

/* ── Login Container ── */
.login-container {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 420px;
  padding: var(--space-md);
  animation: loginFadeIn 1s var(--ease-out-expo) both;
}

@keyframes loginFadeIn {
  from {
    opacity: 0;
    transform: translateY(30px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* ── Login Card ── */
.login-card {
  padding: var(--space-xl) var(--space-lg);
  background: rgba(10, 10, 35, 0.8);
  backdrop-filter: blur(40px);
  -webkit-backdrop-filter: blur(40px);
  border: 1px solid rgba(0, 132, 255, 0.1);
  border-radius: var(--radius-xl);
  position: relative;
  overflow: hidden;
  animation: cardFloat 6s ease-in-out infinite;
}

@keyframes cardFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

.login-card::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 20%;
  right: 20%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-blue), transparent);
  opacity: 0.6;
}

.login-card::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(
    circle at 50% 0%,
    rgba(0, 132, 255, 0.06) 0%,
    transparent 50%
  );
  pointer-events: none;
}

/* ── Logo Area ── */
.login-logo {
  text-align: center;
  margin-bottom: var(--space-lg);
}

.login-logo-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 80px;
  height: 80px;
  margin-bottom: var(--space-sm);
  animation: logoPulse 3s ease-in-out infinite;
}

@keyframes logoPulse {
  0%, 100% {
    filter: drop-shadow(0 0 8px rgba(0, 132, 255, 0.3));
  }
  50% {
    filter: drop-shadow(0 0 20px rgba(0, 132, 255, 0.6));
  }
}

.login-title {
  font-size: 2rem;
  font-weight: var(--fw-black);
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--text-primary), var(--accent-blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.login-subtitle {
  font-size: var(--fs-small);
  color: var(--text-muted);
  font-weight: var(--fw-regular);
  margin-top: 4px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* ── Form ── */
.login-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.input-label {
  font-size: var(--fs-caption);
  font-weight: var(--fw-semibold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.input-icon {
  position: absolute;
  left: 14px;
  color: var(--text-muted);
  pointer-events: none;
  transition: color var(--duration-fast) var(--ease-in-out);
}

.login-input {
  width: 100%;
  padding: 14px 16px 14px 46px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-primary);
  font-size: 1rem;
  outline: none;
  transition: all var(--duration-normal) var(--ease-out-expo);
}

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

.login-input:focus {
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(0, 132, 255, 0.15),
              0 0 20px rgba(0, 132, 255, 0.1);
  background: rgba(0, 132, 255, 0.03);
}

.login-input:focus ~ .input-icon,
.input-wrapper:has(.login-input:focus) .input-icon {
  color: var(--accent-blue);
}

/* ── Error ── */
.error-message {
  font-size: var(--fs-caption);
  color: #ef4444;
  min-height: 1.2em;
  opacity: 0;
  transform: translateY(-4px);
  transition: all var(--duration-fast) var(--ease-out-expo);
}

.error-message.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Button ── */
.login-button {
  position: relative;
  width: 100%;
  padding: 14px 24px;
  background: linear-gradient(135deg, var(--accent-blue), #0066cc);
  border: none;
  border-radius: var(--radius-md);
  color: white;
  font-family: var(--font-primary);
  font-size: 1rem;
  font-weight: var(--fw-semibold);
  cursor: pointer;
  overflow: hidden;
  transition: all var(--duration-normal) var(--ease-out-expo);
}

.login-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 132, 255, 0.4),
              0 0 60px rgba(0, 132, 255, 0.15);
}

.login-button:active {
  transform: translateY(0);
}

.button-glow {
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  background: linear-gradient(135deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  opacity: 0;
  transition: opacity var(--duration-normal);
}

.login-button:hover .button-glow {
  opacity: 1;
  animation: glowSweep 1.5s ease-in-out infinite;
}

@keyframes glowSweep {
  0% { transform: translateX(-100%) rotate(10deg); }
  100% { transform: translateX(100%) rotate(10deg); }
}

/* ── Footer ── */
.login-footer {
  text-align: center;
  margin-top: var(--space-md);
  font-size: var(--fs-caption);
  color: var(--text-muted);
}

.login-footer a {
  color: var(--accent-blue);
  opacity: 0.7;
  transition: opacity var(--duration-fast);
}

.login-footer a:hover {
  opacity: 1;
}

/* ── Shake Animation ── */
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  10%, 30%, 50%, 70%, 90% { transform: translateX(-6px); }
  20%, 40%, 60%, 80% { transform: translateX(6px); }
}

.shake {
  animation: shake 0.5s var(--ease-out-expo);
}

/* ── Responsive ── */
@media (max-width: 480px) {
  .login-card {
    padding: var(--space-lg) var(--space-md);
  }
}