:root {
  --bg-slate-950: #020617;
  --bg-slate-900: #0f172a;
  --border-slate-800: #1e293b;
  --border-slate-700: #334155;
  
  --cyan-400: #22d3ee;
  --cyan-500: #06b6d4;
  --cyan-950: #083344;
  
  --emerald-400: #34d399;
  --rose-400: #fb7185;
  --rose-500: #f43f5e;
  
  --text-white: #ffffff;
  --text-slate-100: #f1f5f9;
  --text-slate-300: #cbd5e1;
  --text-slate-400: #94a3b8;
  
  --glass-glow: 0 8px 32px 0 rgba(2, 6, 23, 0.45);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
}

body {
  background-color: var(--bg-slate-950);
  color: var(--text-slate-100);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
  padding: 1.5rem;
}

/* Ambient Background Glows */
body::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.08) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

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

.logo-area {
  text-align: center;
  margin-bottom: 2rem;
}

.logo-area h1 {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text-white);
  letter-spacing: -0.05em;
  background: linear-gradient(135deg, #ffffff 30%, var(--cyan-400) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 0.5rem;
}

.logo-area p {
  font-size: 0.95rem;
  color: var(--text-slate-400);
}

/* Card Styling */
.login-card {
  background-color: var(--bg-slate-900);
  border: 1px solid var(--border-slate-800);
  border-radius: 24px;
  padding: 2.5rem 2.25rem;
  box-shadow: var(--glass-glow);
  position: relative;
  overflow: hidden;
}

.login-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(400px circle at var(--x, 0) var(--y, 0), rgba(6, 182, 212, 0.04), transparent 45%);
  pointer-events: none;
  z-index: 1;
  opacity: 0;
  transition: opacity 0.5s ease;
}

.login-card:hover::before {
  opacity: 1;
}

.form-group {
  margin-bottom: 1.5rem;
  position: relative;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-slate-300);
  margin-bottom: 0.5rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

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

.input-icon {
  position: absolute;
  left: 1rem;
  width: 1.2rem;
  height: 1.2rem;
  color: var(--text-slate-400);
  transition: color 0.25s ease;
  pointer-events: none;
}

.form-input {
  width: 100%;
  background-color: var(--bg-slate-950);
  border: 1px solid var(--border-slate-800);
  border-radius: 12px;
  padding: 0.85rem 1rem 0.85rem 2.75rem;
  color: var(--text-white);
  font-size: 0.95rem;
  outline: none;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.form-input:focus {
  border-color: var(--cyan-500);
  box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.15);
}

.form-input:focus + .input-icon {
  color: var(--cyan-400);
}

/* Submit Button */
.submit-btn {
  width: 100%;
  background: linear-gradient(135deg, var(--cyan-500) 0%, #0284c7 100%);
  border: none;
  border-radius: 12px;
  padding: 0.95rem;
  color: var(--text-white);
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  box-shadow: 0 4px 20px rgba(6, 182, 212, 0.25);
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  margin-top: 2rem;
}

.submit-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(6, 182, 212, 0.35);
}

.submit-btn:active {
  transform: translateY(1px);
}

.submit-btn.loading {
  opacity: 0.75;
  cursor: not-allowed;
  pointer-events: none;
}

/* Spinner Animation */
.spinner {
  animation: spin 1s linear infinite;
  display: none;
  width: 1.25rem;
  height: 1.25rem;
}

@keyframes spin {
  100% { transform: rotate(360deg); }
}

/* Alert Banner */
.alert-banner {
  background-color: rgba(244, 63, 94, 0.1);
  border: 1px solid rgba(244, 63, 94, 0.2);
  border-radius: 12px;
  padding: 0.75rem 1rem;
  display: none;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1.5rem;
  color: var(--rose-400);
  font-size: 0.85rem;
  font-weight: 500;
  animation: slideIn 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes slideIn {
  from { transform: translateY(-10px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}