/* Minimalist Monochrome Login Theme - Ultra Clean */
:root {
  /* Monochrome color palette */
  --pure-black: #000000;
  --charcoal: #1a1a1a;
  --dark-gray: #2d2d2d;
  --medium-gray: #404040;
  --light-gray: #6b7280;
  --pale-gray: #9ca3af;
  --off-white: #f8f9fa;
  --pure-white: #ffffff;
  
  /* Accent colors - minimal */
  --accent-white: #ffffff;
  --accent-gray: #6b7280;
  --accent-light: #e5e7eb;
  
  /* Shadows and effects - monochrome */
  --shadow-soft: 0 8px 32px rgba(0, 0, 0, 0.08);
  --shadow-medium: 0 16px 48px rgba(0, 0, 0, 0.12);
  --shadow-strong: 0 24px 64px rgba(0, 0, 0, 0.16);
  --glow-subtle: 0 0 20px rgba(255, 255, 255, 0.1);
}

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

html, body {
  height: 100%;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

body {
  background: linear-gradient(135deg, var(--pure-black) 0%, var(--charcoal) 50%, var(--dark-gray) 100%);
  color: var(--pure-white);
  overflow-x: hidden;
  position: relative;
}

/* Coffee Background with Floating Elements */
.coffee-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
}

/* Steam Animation - Monochrome */
.steam {
  position: absolute;
  width: 3px;
  height: 50px;
  background: linear-gradient(to top, transparent, rgba(255, 255, 255, 0.6), transparent);
  border-radius: 2px;
  opacity: 0;
  animation: steam-rise 4s infinite ease-out;
}

.steam-1 {
  top: 20%;
  left: 15%;
  animation-delay: 0s;
}

.steam-2 {
  top: 25%;
  left: 85%;
  animation-delay: 1.5s;
}

.steam-3 {
  top: 30%;
  left: 45%;
  animation-delay: 3s;
}

@keyframes steam-rise {
  0% {
    opacity: 0;
    transform: translateY(0) scaleY(0);
  }
  20% {
    opacity: 0.8;
    transform: translateY(-20px) scaleY(1);
  }
  80% {
    opacity: 0.4;
    transform: translateY(-60px) scaleY(0.8);
  }
  100% {
    opacity: 0;
    transform: translateY(-80px) scaleY(0);
  }
}

/* Floating Geometric Elements - Monochrome */
.coffee-bean {
  position: absolute;
  font-size: 20px;
  opacity: 0.3;
  animation: float 6s infinite ease-in-out;
  color: var(--pure-white);
}

.bean-1 {
  top: 15%;
  left: 10%;
  animation-delay: 0s;
}

.bean-2 {
  top: 20%;
  right: 15%;
  animation-delay: 2s;
}

.bean-3 {
  bottom: 25%;
  left: 20%;
  animation-delay: 4s;
}

.bean-4 {
  bottom: 30%;
  right: 25%;
  animation-delay: 1s;
}

@keyframes float {
  0%, 100% {
    transform: translateY(0px) rotate(0deg);
  }
  50% {
    transform: translateY(-20px) rotate(180deg);
  }
}

/* Main Login Container */
.login-container {
  position: relative;
  z-index: 2;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.login-card {
  background: var(--pure-white);
  backdrop-filter: blur(20px);
  border-radius: 16px;
  padding: 48px;
  width: 100%;
  max-width: 420px;
  box-shadow: var(--shadow-strong);
  border: 1px solid var(--accent-light);
  position: relative;
  overflow: hidden;
}

.login-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--pure-black), var(--medium-gray), var(--pure-black));
  background-size: 200% 100%;
  animation: shimmer 3s infinite linear;
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* Brand Section */
.brand-section {
  text-align: center;
  margin-bottom: 32px;
}

.logo-container {
  position: relative;
  display: inline-block;
  margin-bottom: 16px;
}

.coffee-logo {
  font-size: 48px;
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.2));
  animation: logo-bounce 2s infinite ease-in-out;
  color: var(--pure-black);
}

@keyframes logo-bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.logo-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 80px;
  height: 80px;
  background: radial-gradient(circle, rgba(0, 0, 0, 0.1) 0%, transparent 70%);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  animation: glow-pulse 3s infinite ease-in-out;
}

@keyframes glow-pulse {
  0%, 100% { opacity: 0.3; transform: translate(-50%, -50%) scale(1); }
  50% { opacity: 0.6; transform: translate(-50%, -50%) scale(1.2); }
}

.brand-title {
  font-size: 32px;
  font-weight: 800;
  color: var(--pure-black);
  margin-bottom: 8px;
  background: linear-gradient(135deg, var(--pure-black), var(--medium-gray));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.brand-subtitle {
  font-size: 16px;
  color: var(--light-gray);
  font-weight: 400;
  margin-bottom: 0;
}

/* Welcome Section */
.welcome-section {
  text-align: center;
  margin-bottom: 32px;
}

.welcome-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--pure-black);
  margin-bottom: 8px;
}

.welcome-text {
  font-size: 16px;
  color: var(--light-gray);
  font-weight: 400;
}

/* Form Styles */
.login-form {
  margin-bottom: 24px;
}

.form-group {
  margin-bottom: 20px;
}

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

.input-icon {
  position: absolute;
  left: 16px;
  font-size: 18px;
  color: var(--light-gray);
  z-index: 2;
  transition: all 0.3s ease;
}

.input-wrapper input {
  width: 100%;
  padding: 16px 16px 16px 48px;
  border: 2px solid var(--accent-light);
  border-radius: 12px;
  background: var(--off-white);
  color: var(--pure-black);
  font-size: 16px;
  font-weight: 500;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.input-wrapper input::placeholder {
  color: var(--pale-gray);
  opacity: 0.8;
}

.input-wrapper input:focus {
  outline: none;
  border-color: var(--pure-black);
  background: var(--pure-white);
  box-shadow: 0 0 0 4px rgba(0, 0, 0, 0.05);
  transform: translateY(-2px);
}

.input-wrapper input:focus + .input-focus-border {
  opacity: 1;
  transform: scaleX(1);
}

.input-wrapper input:focus ~ .input-icon {
  color: var(--pure-black);
  transform: scale(1.1);
}

.input-focus-border {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--pure-black), var(--medium-gray));
  opacity: 0;
  transform: scaleX(0);
  transition: all 0.3s ease;
}

/* Login Button - Monochrome */
.login-btn {
  width: 100%;
  padding: 18px 24px;
  background: var(--pure-black);
  border: 2px solid var(--pure-black);
  border-radius: 12px;
  color: var(--pure-white);
  font-size: 18px;
  font-weight: 700;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-medium);
}

.login-btn:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-strong);
  background: var(--charcoal);
  border-color: var(--charcoal);
}

.login-btn:active {
  transform: translateY(-1px);
  background: var(--dark-gray);
  border-color: var(--dark-gray);
}

.btn-glow {
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  transition: left 0.5s ease;
}

.login-btn:hover .btn-glow {
  left: 100%;
}

.btn-spinner {
  display: none;
  width: 20px;
  height: 20px;
  border: 2px solid transparent;
  border-top: 2px solid currentColor;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-left: 8px;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Error Message - Monochrome */
.error-message {
  background: var(--off-white);
  border: 1px solid var(--light-gray);
  color: var(--pure-black);
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  text-align: center;
  margin-top: 16px;
}

/* Footer */
.login-footer {
  text-align: center;
  margin-top: 32px;
}

.footer-text {
  font-size: 14px;
  color: var(--light-gray);
  margin-bottom: 12px;
}

.footer-decoration {
  font-size: 16px;
  opacity: 0.6;
  animation: footer-bounce 2s infinite ease-in-out;
}

@keyframes footer-bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-4px); }
}

/* Responsive Design */
@media (max-width: 480px) {
  .login-card {
    padding: 32px 24px;
    margin: 16px;
  }
  
  .brand-title {
    font-size: 28px;
  }
  
  .welcome-title {
    font-size: 20px;
  }
  
  .coffee-logo {
    font-size: 40px;
  }
}

/* Loading State */
.login-btn.loading .btn-text {
  opacity: 0;
}

.login-btn.loading .btn-spinner {
  display: inline-block;
}

/* Focus States for Accessibility - Monochrome */
.login-btn:focus-visible {
  outline: 3px solid var(--pure-black);
  outline-offset: 2px;
}

.input-wrapper input:focus-visible {
  outline: 3px solid var(--pure-black);
  outline-offset: 2px;
}