* {
  box-sizing: border-box;
}

body {
  overflow-x: hidden;
  background: var(--color-bg-gradient);
}

.container, .main-content {
  overflow-x: hidden;
  padding-left: 16px;
  padding-right: 16px;
}

.products-grid {
  margin: 0 auto;
  padding: 0 4px;
  gap: 36px;
  max-width: 1100px;
  width: 100%;
}

.product-card {
  margin: 0;
  width: 100%;
  max-width: 400px;
}

:root {
  --color-bg: #f4f6fb;
  --color-bg-gradient: linear-gradient(135deg, #e0e7ff 0%, #f4f6fb 100%);
  --color-bg-glass: rgba(255,255,255,0.85);
  --color-bg-glass-dark: rgba(36,39,48,0.92);
  --color-primary: #6366f1;
  --color-primary-hover: #4f46e5;
  --color-accent: #38bdf8;
  --color-danger: #ef4444;
  --color-success: #22c55e;
  --color-text: #23272f;
  --color-text-light: #6b7280;
  --color-border: #e5e7eb;
  --color-card-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.10);
  --color-card-shadow-hover: 0 16px 40px 0 rgba(31, 38, 135, 0.18);
  --transition: 0.22s cubic-bezier(.4,0,.2,1);
  --radius: 18px;
  --radius-sm: 10px;
}
body.dark {
  --color-bg: #0f1419;
  --color-bg-gradient: linear-gradient(135deg, #1a1f2e 0%, #0f1419 100%);
  --color-bg-glass: rgba(26,31,46,0.95);
  --color-bg-glass-dark: rgba(15,20,25,0.98);
  --color-primary: #60a5fa;
  --color-primary-hover: #3b82f6;
  --color-accent: #38bdf8;
  --color-danger: #f87171;
  --color-success: #4ade80;
  --color-text: #f8fafc;
  --color-text-light: #cbd5e1;
  --color-border: #334155;
  --color-card-shadow: 0 8px 32px 0 rgba(0,0,0,0.4);
  --color-card-shadow-hover: 0 16px 40px 0 rgba(0,0,0,0.5);
}
html, body {
  min-height: 100vh;
  background: var(--color-bg-gradient);
  color: var(--color-text);
  font-family: 'Inter', 'Segoe UI', Arial, sans-serif;
  transition: background var(--transition), color var(--transition);
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
}
/* StockHive - Central hub for all your products */
/* Modern Header Design */
.header {
  background: var(--color-bg-glass);
  backdrop-filter: blur(20px);
  border-radius: var(--radius);
  padding: 40px 40px 32px 40px;
  margin-bottom: 48px;
  box-shadow: var(--color-card-shadow);
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.1);
}

.header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  animation: shimmer 2s ease-in-out infinite;
}

@keyframes shimmer {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

/* Header Content Container */
.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 32px;
  position: relative;
  z-index: 2;
}

/* Left Side - Title Area */
.header-title {
  flex: 1;
  text-align: left;
  min-width: 0;
  animation: slideInLeft 0.8s ease-out;
}

@keyframes slideInLeft {
  from { opacity: 0; transform: translateX(-30px); }
  to { opacity: 1; transform: translateX(0); }
}

.header h1 {
  font-size: 2.8rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin: 0 0 12px 0;
  letter-spacing: -0.8px;
  display: flex;
  align-items: center;
  gap: 20px;
  line-height: 1.1;
}

.header h1 i {
  font-size: 2.6rem;
  color: var(--color-primary);
  animation: float 3s ease-in-out infinite;
  filter: drop-shadow(0 4px 8px rgba(99,102,241,0.2));
}

@keyframes float {
  0%, 100% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-8px) rotate(2deg); }
}

/* Animated Stock Icon */
.animated-stock-icon {
  position: relative;
  display: inline-block;
  animation: stockPulse 2s ease-in-out infinite;
}

.animated-stock-icon::before {
  content: '';
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  background: linear-gradient(45deg, var(--color-primary), var(--color-accent), var(--color-success));
  border-radius: 50%;
  opacity: 0.3;
  animation: stockGlow 3s ease-in-out infinite;
  z-index: -1;
}

.animated-stock-icon::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: radial-gradient(circle, var(--color-accent) 0%, transparent 70%);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  animation: stockRipple 2.5s ease-in-out infinite;
  z-index: -1;
}

@keyframes stockPulse {
  0%, 100% { 
    transform: scale(1) rotate(0deg); 
    filter: drop-shadow(0 4px 8px rgba(0,0,0,0.15));
  }
  25% { 
    transform: scale(1.05) rotate(2deg); 
    filter: drop-shadow(0 6px 12px rgba(0,0,0,0.2));
  }
  50% { 
    transform: scale(1.1) rotate(-1deg); 
    filter: drop-shadow(0 8px 16px rgba(0,0,0,0.25));
  }
  75% { 
    transform: scale(1.05) rotate(1deg); 
    filter: drop-shadow(0 6px 12px rgba(0,0,0,0.2));
  }
}

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

@keyframes stockRipple {
  0% { 
    width: 0; 
    height: 0; 
    opacity: 0.8;
  }
  50% { 
    width: 60px; 
    height: 60px; 
    opacity: 0.4;
  }
  100% { 
    width: 80px; 
    height: 80px; 
    opacity: 0;
  }
}

/* Dark theme adjustments for stock icon */
body.dark .animated-stock-icon::before {
  background: linear-gradient(45deg, var(--color-primary), var(--color-accent), var(--color-success));
  opacity: 0.4;
}

body.dark .animated-stock-icon::after {
  background: radial-gradient(circle, var(--color-accent) 0%, transparent 70%);
}

.header p {
  font-size: 1.2rem;
  color: var(--color-text-light);
  margin: 0;
  font-weight: 500;
  line-height: 1.5;
  opacity: 0.9;
}

/* Right Side - User Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-shrink: 0;
  animation: slideInRight 0.8s ease-out 0.2s both;
}

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

/* Modern User Info Card */
.user-info {
  display: flex;
  align-items: center;
  gap: 16px;
  background: rgba(255,255,255,0.1);
  padding: 16px 24px;
  border-radius: var(--radius-sm);
  backdrop-filter: blur(15px);
  border: 1px solid rgba(255,255,255,0.2);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 8px 32px rgba(0,0,0,0.1);
  min-width: 260px;
  max-width: 340px;
  position: relative;
  overflow: hidden;
}

.user-info::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
  transition: left 0.6s;
}

.user-info:hover::before {
  left: 100%;
}

.user-info:hover {
  border-color: var(--color-primary);
  box-shadow: 0 12px 40px rgba(99,102,241,0.2);
  transform: translateY(-3px) scale(1.02);
  background: rgba(255,255,255,0.15);
}

.user-info span {
  font-weight: 600;
  color: var(--color-text);
  font-size: 1rem;
  flex: 1;
  text-align: left;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
  position: relative;
  z-index: 1;
}

/* Modern Logout Button */
.btn-sm {
  padding: 12px 20px;
  font-size: 0.9rem;
  border-radius: var(--radius-sm);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  color: var(--color-text);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(0,0,0,0.1);
  min-height: 44px;
  white-space: nowrap;
  flex-shrink: 0;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
}

.btn-sm::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s;
}

.btn-sm:hover::before {
  left: 100%;
}

.btn-sm:hover {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: white;
  border-color: var(--color-primary);
  box-shadow: 0 8px 24px rgba(99,102,241,0.3);
  transform: translateY(-2px) scale(1.05);
}

/* Modern Theme Toggle */
.theme-toggle {
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 50%;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 6px 20px rgba(0,0,0,0.1);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  color: var(--color-primary);
  font-size: 1.3rem;
  overflow: hidden;
  flex-shrink: 0;
  position: relative;
  backdrop-filter: blur(10px);
}

.theme-toggle::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  opacity: 0;
  transition: opacity 0.3s ease;
  border-radius: 50%;
}

.theme-toggle:hover::before {
  opacity: 0.15;
}

.theme-toggle:hover {
  border-color: var(--color-primary);
  box-shadow: 0 8px 28px rgba(99,102,241,0.25);
  transform: translateY(-3px) scale(1.08) rotate(5deg);
  color: var(--color-primary);
}

.theme-toggle:active {
  transform: translateY(-1px) scale(1.05);
}

/* Responsive Design */
@media (max-width: 1024px) {
  .header {
    padding: 28px 24px 20px 24px;
  }
  
  .header h1 {
    font-size: 2.2rem;
  }
  
  .user-info {
    min-width: 200px;
    max-width: 280px;
  }
}

@media (max-width: 900px) {
  .header h1 {
    font-size: 2rem;
  }
  
  .header p {
    font-size: 1rem;
  }
  
  .user-info {
    min-width: 180px;
    max-width: 240px;
    padding: 10px 16px;
  }
  
  .user-info span {
    font-size: 0.9rem;
  }
  
  .btn-sm {
    padding: 8px 14px;
    font-size: 0.8rem;
  }
}

@media (max-width: 768px) {
  .header {
    padding: 24px 20px 16px 20px;
  }
  
  .header-content {
    flex-direction: column;
    gap: 20px;
    align-items: center;
    text-align: center;
  }
  
  .header-title {
    text-align: center;
  }
  
  .header h1 {
    font-size: 1.8rem;
    justify-content: center;
  }
  
  .header p {
    font-size: 0.95rem;
  }
  
  .header-actions {
    margin-top: 0;
    gap: 12px;
  }
  
  .user-info {
    flex-direction: column;
    gap: 12px;
    min-width: auto;
    max-width: none;
    padding: 16px 20px;
    width: 100%;
    max-width: 300px;
  }
  
  .user-info span {
    text-align: center;
    font-size: 1rem;
  }
  
  .theme-toggle {
    margin-top: 8px;
  }
}

@media (max-width: 480px) {
  .header h1 {
    font-size: 1.6rem;
    flex-direction: column;
    gap: 8px;
  }
  
  .header-actions {
    flex-direction: column;
    gap: 12px;
    width: 100%;
  }
  
  .user-info {
    width: 100%;
    max-width: 280px;
  }
  
  .btn-sm {
    width: 100%;
    justify-content: center;
  }
}

/* Authentication Section */
/* Enhanced Authentication Section */
.auth-section {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 70vh;
  padding: 40px 20px;
  position: relative;
  overflow: hidden;
}

.auth-section::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(99,102,241,0.1) 0%, rgba(56,189,248,0.05) 50%, transparent 100%);
  animation: authBgFloat 20s ease-in-out infinite;
  z-index: -1;
}

@keyframes authBgFloat {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  25% { transform: translate(-10px, -10px) rotate(1deg); }
  50% { transform: translate(10px, -5px) rotate(-1deg); }
  75% { transform: translate(-5px, 10px) rotate(0.5deg); }
}

.auth-container {
  background: var(--color-bg-glass);
  backdrop-filter: blur(25px);
  border-radius: 24px;
  padding: 48px 40px;
  box-shadow: 
    0 20px 60px rgba(0,0,0,0.1),
    0 8px 32px rgba(99,102,241,0.1),
    inset 0 1px 0 rgba(255,255,255,0.2);
  width: 100%;
  max-width: 480px;
  border: 1px solid rgba(255,255,255,0.2);
  position: relative;
  animation: authSlideIn 0.8s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;
}

.auth-container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent), var(--color-primary));
  background-size: 200% 100%;
  animation: authShimmer 3s ease-in-out infinite;
}

@keyframes authSlideIn {
  from { 
    opacity: 0; 
    transform: translateY(40px) scale(0.95); 
  }
  to { 
    opacity: 1; 
    transform: translateY(0) scale(1); 
  }
}

@keyframes authShimmer {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.auth-tabs {
  display: flex;
  margin-bottom: 40px;
  background: rgba(255,255,255,0.1);
  border-radius: 16px;
  padding: 6px;
  gap: 6px;
  border: 1px solid rgba(255,255,255,0.1);
  backdrop-filter: blur(10px);
}

.auth-tab {
  flex: 1;
  padding: 14px 28px;
  border: none;
  background: transparent;
  color: var(--color-text-light);
  font-weight: 600;
  font-size: 1rem;
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.auth-tab::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s;
}

.auth-tab:hover::before {
  left: 100%;
}

.auth-tab.active {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: white;
  box-shadow: 0 4px 16px rgba(99,102,241,0.3);
  transform: translateY(-1px);
}

.auth-tab:hover:not(.active) {
  background: rgba(255,255,255,0.15);
  color: var(--color-text);
  transform: translateY(-1px);
}

.auth-form {
  display: none;
  animation: formFadeIn 0.5s ease-out;
}

.auth-form.active {
  display: block;
}

@keyframes formFadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.auth-form h2 {
  text-align: center;
  margin-bottom: 36px;
  color: var(--color-text);
  font-size: 1.8rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.auth-form h2 i {
  font-size: 1.6rem;
  color: var(--color-primary);
  -webkit-text-fill-color: var(--color-primary);
  animation: authIconPulse 2s ease-in-out infinite;
}

@keyframes authIconPulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.1); }
}

.auth-form .form-group {
  margin-bottom: 24px;
  position: relative;
}

.auth-form .form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  color: var(--color-text);
  font-size: 0.95rem;
  transition: color 0.3s ease;
}

.auth-form .form-group:focus-within label {
  color: var(--color-primary);
}

.auth-form .form-group input {
  width: 100%;
  padding: 16px 20px;
  border: 2px solid rgba(255,255,255,0.2);
  border-radius: 12px;
  font-size: 1rem;
  background: rgba(255,255,255,0.1);
  color: var(--color-text);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  backdrop-filter: blur(10px);
}

.auth-form .form-group input:focus {
  outline: none;
  border-color: var(--color-primary);
  background: rgba(255,255,255,0.15);
  box-shadow: 0 0 0 4px rgba(99,102,241,0.1);
  transform: translateY(-2px);
}

.auth-form .form-group input::placeholder {
  color: var(--color-text-light);
  opacity: 0.7;
}

.btn-full {
  width: 100%;
  margin-top: 24px;
  padding: 16px 24px;
  font-size: 1.1rem;
  font-weight: 600;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  border: none;
  color: white;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(99,102,241,0.3);
}

.btn-full::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.6s;
}

.btn-full:hover::before {
  left: 100%;
}

.btn-full:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(99,102,241,0.4);
}

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

.btn-full i {
  margin-right: 8px;
  transition: transform 0.3s ease;
}

.btn-full:hover i {
  transform: translateX(4px);
}

/* App Section */
.app-section {
  width: 100%;
}
/* Modern Navigation Buttons */
.nav {
  display: flex;
  gap: 20px;
  margin-bottom: 40px;
  flex-wrap: wrap;
  justify-content: center;
  padding: 0 12px;
  animation: fadeInUp 0.8s ease-out 0.4s both;
}

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

.nav-btn {
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  padding: 18px 28px;
  border-radius: var(--radius-sm);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 16px rgba(0,0,0,0.1);
  display: flex;
  align-items: center;
  gap: 12px;
  outline: none;
  min-width: 160px;
  justify-content: center;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
  min-height: 56px;
}

.nav-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.6s;
}

.nav-btn:hover::before {
  left: 100%;
}

.nav-btn:hover, .nav-btn.active, .nav-btn:focus {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #fff;
  border-color: var(--color-primary);
  box-shadow: 0 8px 28px rgba(99,102,241,0.3);
  transform: translateY(-4px) scale(1.03);
}

.nav-btn:active {
  transform: translateY(-2px) scale(1.01);
}

.nav-btn i {
  font-size: 1.1rem;
  transition: transform 0.3s ease;
}

.nav-btn:hover i {
  transform: scale(1.2) rotate(5deg);
}

.main-content {
  background: var(--color-bg-glass);
  backdrop-filter: blur(14px);
  border-radius: var(--radius);
  padding: 38px 24px;
  box-shadow: var(--color-card-shadow);
  min-height: 600px;
  transition: background var(--transition), box-shadow var(--transition);
}
.section {
  display: none;
}
.section.active {
  display: block;
  animation: fadeIn 0.5s var(--transition);
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
/* Enhanced Section Headers */
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 32px;
  padding-bottom: 20px;
  border-bottom: 2px solid var(--color-border);
  position: relative;
}

.section-header::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 60px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  border-radius: 1px;
}

.section-header h2 {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0;
}
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 36px;
  align-items: start;
  max-width: 1100px;
  margin: 0 auto;
}
/* Modern Product Cards */
.product-card {
  background: rgba(255,255,255,0.1);
  border-radius: var(--radius);
  padding: 28px 24px 24px 24px;
  box-shadow: var(--color-card-shadow);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid rgba(255,255,255,0.2);
  display: flex;
  flex-direction: column;
  max-width: 400px;
  margin: 0 auto;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  height: 100%;
  backdrop-filter: blur(10px);
  animation: cardSlideIn 0.6s ease-out;
}

@keyframes cardSlideIn {
  from { opacity: 0; transform: translateY(30px) scale(0.95); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transform: scaleX(0);
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.product-card:hover::before {
  transform: scaleX(1);
}

.product-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
  transition: left 0.6s;
}

.product-card:hover::after {
  left: 100%;
}

.product-card:hover {
  box-shadow: 0 20px 60px rgba(99,102,241,0.2);
  background: rgba(255,255,255,0.15);
  transform: translateY(-12px) scale(1.03);
  border-color: var(--color-primary);
}
/* Modern Product Image */
.product-image {
  width: 100%;
  height: 220px;
  border-radius: var(--radius-sm);
  margin-bottom: 24px;
  background: rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-light);
  font-size: 3.5rem;
  overflow: hidden;
  position: relative;
  box-shadow: 0 8px 24px rgba(99,102,241,0.15);
  border: 1px solid rgba(255,255,255,0.2);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  backdrop-filter: blur(5px);
}

.product-image::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(99,102,241,0.1), rgba(56,189,248,0.1));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.product-image:hover::before {
  opacity: 1;
}

.product-image:hover {
  border-color: var(--color-primary);
  box-shadow: 0 12px 32px rgba(99,102,241,0.25);
  transform: scale(1.03) translateY(-4px);
}

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-sm);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  display: block;
  position: relative;
  z-index: 1;
}

.product-image img:hover {
  transform: scale(1.08);
}

/* Enhanced Product Info */
.product-info {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  flex: 1;
  gap: 12px;
}

.product-brand {
  color: var(--color-primary);
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 8px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.product-description {
  color: var(--color-text-light);
  font-size: 1.02rem;
  line-height: 1.6;
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 3em;
  flex: 1;
}

.product-price {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-success);
  margin-bottom: 12px;
  margin-top: auto;
}

.product-category {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: white;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  display: inline-block;
  align-self: flex-start;
  margin-bottom: 0;
  letter-spacing: 0.01em;
  box-shadow: 0 2px 8px rgba(99,102,241,0.2);
}

.product-stock {
  font-size: 0.9rem;
  color: var(--color-text-light);
  margin-top: 8px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 6px;
}

.product-stock::before {
  content: '📦';
  font-size: 1rem;
}

/* Enhanced Product Header */
.product-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 12px;
  gap: 12px;
  position: relative;
}

.product-info h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 0;
  flex: 1;
  cursor: pointer;
  transition: color var(--transition);
  line-height: 1.3;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.product-info h3:hover {
  color: var(--color-primary);
}
.btn-delete {
  background: linear-gradient(135deg, #ef4444, #dc2626);
  color: white;
  border: none;
  border-radius: 8px;
  padding: 10px 14px;
  cursor: pointer;
  transition: all var(--transition);
  font-size: 0.9rem;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  outline: none;
  box-shadow: 0 2px 8px rgba(239, 68, 68, 0.2);
  position: relative;
  overflow: hidden;
}

.btn-delete::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255,255,255,0.2);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.3s, height 0.3s;
}

.btn-delete:hover::before {
  width: 100%;
  height: 100%;
}

.btn-delete:hover, .btn-delete:focus {
  transform: translateY(-2px) scale(1.05);
  box-shadow: 0 4px 16px rgba(239, 68, 68, 0.3);
}
.product-brand {
  color: var(--color-primary);
  font-weight: 600;
  font-size: 0.98rem;
  margin-bottom: 6px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.product-description {
  color: var(--color-text-light);
  font-size: 1.01rem;
  line-height: 1.5;
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 2.8em;
}
.product-price {
  font-size: 1.18rem;
  font-weight: 700;
  color: var(--color-success);
  margin-bottom: 8px;
  margin-top: auto;
}
.product-category {
  background: var(--color-primary);
  color: white;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  display: inline-block;
  align-self: flex-start;
  margin-bottom: 0;
  letter-spacing: 0.01em;
}
body.dark .product-category {
  background: var(--color-primary);
  color: white;
}
/* Modal, Toast, Form, Category, and Responsive styles would follow the same modern, glassy, animated, and color-variable-driven approach. */

/* Buttons */
/* Modern Buttons */
.btn {
  padding: 18px 32px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 1.05rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-family: inherit;
  outline: none;
  position: relative;
  overflow: hidden;
  min-height: 60px;
  justify-content: center;
  backdrop-filter: blur(10px);
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.6s;
}

.btn:hover::before {
  left: 100%;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: white;
  border-color: var(--color-primary);
  box-shadow: 0 6px 20px rgba(99,102,241,0.25);
}

.btn-primary:hover, .btn-primary:focus {
  background: linear-gradient(135deg, var(--color-primary-hover), var(--color-accent));
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 10px 28px rgba(99,102,241,0.35);
}

.btn-primary:active {
  transform: translateY(-1px) scale(1.01);
}

.btn-secondary {
  background: rgba(255,255,255,0.1);
  color: var(--color-text);
  border-color: rgba(255,255,255,0.2);
  box-shadow: 0 4px 16px rgba(0,0,0,0.1);
}

.btn-secondary:hover, .btn-secondary:focus {
  background: rgba(99,102,241,0.1);
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 8px 24px rgba(99,102,241,0.2);
}

.btn-secondary:active {
  transform: translateY(-1px) scale(1.01);
}

.btn i {
  transition: transform 0.3s ease;
}

.btn:hover i {
  transform: scale(1.2) rotate(5deg);
}

/* Modern Stats Bar */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 28px;
  margin-bottom: 48px;
  padding: 0 12px;
  animation: fadeInUp 0.8s ease-out 0.6s both;
}

.stat {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: white;
  border-radius: var(--radius);
  box-shadow: 0 8px 32px rgba(99,102,241,0.2);
  padding: 36px 20px;
  min-height: 160px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.1);
  backdrop-filter: blur(10px);
  min-width: 200px;
}

.stat::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.15), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.stat::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.6s;
}

.stat:hover::before {
  opacity: 1;
}

.stat:hover::after {
  left: 100%;
}

.stat:hover, .stat:focus {
  box-shadow: 0 16px 48px rgba(99,102,241,0.3);
  transform: translateY(-8px) scale(1.05);
  border-color: rgba(255,255,255,0.2);
}

.stat-icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
  color: white;
  opacity: 0.9;
  filter: drop-shadow(0 2px 8px rgba(255,255,255,0.2));
}

.stat-number {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 8px;
  letter-spacing: 0.5px;
  color: white;
  text-shadow: 0 2px 4px rgba(0,0,0,0.1);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  text-align: center;
  padding: 0 8px;
  line-height: 1.2;
}

.stat-label {
  font-size: 1rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.9);
  text-align: center;
  line-height: 1.3;
}

/* Search Section */
.search-container {
    max-width: 800px;
    margin: 0 auto;
}

.search-box {
  display: flex;
  gap: 16px;
  margin-bottom: 32px;
  align-items: stretch;
}

.search-input {
  flex: 1;
  padding: 16px 20px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  background: var(--color-bg-glass);
  color: var(--color-text);
  transition: all var(--transition);
  min-height: 56px;
}

.search-input:focus {
    outline: none;
    border-color: var(--color-primary);
    background: rgba(96,165,250,0.05);
    box-shadow: 0 0 0 4px rgba(99,102,241,0.1);
    transform: translateY(-1px);
}

.search-results {
    min-height: 200px;
}

/* Categories Section */
.categories-container {
    display: flex;
    flex-direction: row;
    gap: 24px;
}
.category-filters {
    min-width: 180px;
    max-width: 220px;
    background: var(--color-bg-glass);
    padding: 18px 10px;
    border-radius: var(--radius);
    height: fit-content;
    border: 1.5px solid var(--color-border);
    box-shadow: var(--color-card-shadow);
    transition: background var(--transition), box-shadow var(--transition);
}
.category-filter {
    display: block;
    width: 100%;
    padding: 12px 16px;
    margin-bottom: 8px;
    background: var(--color-bg-glass);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition);
    text-align: left;
    font-weight: 600;
    font-size: 1rem;
    color: var(--color-text);
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}
.category-filter:hover {
    border-color: var(--color-primary);
    background: rgba(96,165,250,0.08);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(99,102,241,0.12);
}
.category-filter.active {
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    color: white;
    border-color: var(--color-primary);
    box-shadow: 0 4px 16px rgba(99,102,241,0.18);
    transform: translateY(-2px);
}

.category-results {
    min-height: 400px;
}

/* Form Styles */
.form-container {
    max-width: 800px;
    margin: 0 auto;
}

.product-form {
    background: var(--color-bg-glass);
    backdrop-filter: blur(14px);
    padding: 38px 32px;
    border-radius: var(--radius);
    border: 1.5px solid var(--color-border);
    box-shadow: var(--color-card-shadow);
    transition: background var(--transition), box-shadow var(--transition);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 24px;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 10px;
    font-weight: 600;
    color: var(--color-text);
    font-size: 1rem;
    transition: color var(--transition);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    background: var(--color-bg-glass);
    color: var(--color-text);
    transition: all var(--transition);
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    background: rgba(96,165,250,0.08);
    box-shadow: 0 0 0 3px rgba(99,102,241,0.12);
    transform: translateY(-1px);
}

.form-group input::placeholder,
.form-group select::placeholder,
.form-group textarea::placeholder {
    color: var(--color-text-light);
    opacity: 0.7;
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
    line-height: 1.5;
}

.form-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-top: 36px;
    padding-top: 24px;
    border-top: 1.5px solid var(--color-border);
}

/* Modal */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(30, 34, 40, 0.55);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.25s;
}

.modal-content {
  background: var(--color-bg-glass);
  border-radius: 24px;
  box-shadow: 0 12px 48px rgba(0,0,0,0.18);
  padding: 36px 32px 32px 32px;
  min-width: 400px;
  max-width: 800px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  animation: modalPopIn 0.32s cubic-bezier(.4,0,.2,1);
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  margin: auto;
}

@keyframes modalPopIn {
  from { opacity: 0; transform: scale(0.92) translateY(40px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.close {
    display: none; /* Hide the old close button */
}

/* Enhanced Loading and Placeholder */
.loading {
  text-align: center;
  padding: 80px 20px;
  color: var(--color-text-light);
  background: var(--color-bg-glass);
  border-radius: var(--radius);
  border: 2px solid var(--color-border);
  margin: 20px 0;
}

.loading i {
  font-size: 3.5rem;
  margin-bottom: 24px;
  color: var(--color-primary);
  animation: spin 1s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.placeholder-text {
  text-align: center;
  color: var(--color-text-light);
  font-style: italic;
  padding: 80px 20px;
  background: var(--color-bg-glass);
  border-radius: var(--radius);
  border: 2px dashed var(--color-border);
  margin: 20px 0;
  font-size: 1.1rem;
}

/* Toast Notifications */
.toast {
  position: fixed;
  top: 24px;
  right: 24px;
  padding: 16px 24px;
  border-radius: var(--radius-sm);
  color: white;
  font-weight: 600;
  z-index: 1001;
  transform: translateX(400px);
  transition: all var(--transition);
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.1);
  max-width: 350px;
}

.toast.show {
  transform: translateX(0);
}

.toast.success {
  background: linear-gradient(135deg, var(--color-success), #16a34a);
}

.toast.error {
  background: linear-gradient(135deg, var(--color-danger), #dc2626);
}

.toast.info {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
}

/* Responsive Design */
@media (max-width: 1100px) {
    .products-grid {
        grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
        max-width: 100%;
    }
    .product-card {
        max-width: 100%;
    }
}
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .header {
        padding: 20px;
    }
    
    .header h1 {
        font-size: 2rem;
    }
    
    .nav {
        flex-direction: column;
    }
    
    .nav-btn {
        width: 100%;
        justify-content: center;
    }
    
    .main-content {
        padding: 20px;
    }
    
    .section-header {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
    
    .stats-bar {
        grid-template-columns: 1fr;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
        gap: 20px;
        max-width: 100%;
    }
    
    .product-card {
        padding: 14px;
    }
    .product-image {
        height: 120px;
    }
    
    .search-box {
        flex-direction: column;
    }
    
    .categories-container {
        flex-direction: column;
        gap: 15px;
    }
    
    .category-filters {
        min-width: 100%;
        max-width: 100%;
        padding: 10px;
    }
    
    .category-filter {
        width: 100%;
        justify-content: center;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .modal-content {
        width: 95%;
        padding: 20px;
        max-height: 85vh;
        margin: auto;
    }
}

@media (max-width: 480px) {
    .header h1 {
        font-size: 1.5rem;
    }
    
    .section-header h2 {
        font-size: 1.4rem;
    }
    
    .product-card {
        padding: 20px;
    }
    
    .product-info h3 {
        font-size: 1.1rem;
    }
} 

/* --- IMPROVED CATEGORY SECTION --- */
.categories-container {
    display: flex;
    flex-direction: row;
    gap: 24px;
}
.category-filters {
    min-width: 180px;
    max-width: 220px;
    background: var(--color-bg-glass);
    padding: 18px 10px;
    border-radius: var(--radius);
    height: fit-content;
    border: 1.5px solid var(--color-border);
    box-shadow: var(--color-card-shadow);
    transition: background var(--transition), box-shadow var(--transition);
}
.category-filter {
    display: block;
    width: 100%;
    padding: 12px 16px;
    margin-bottom: 8px;
    background: var(--color-bg-glass);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition);
    text-align: left;
    font-weight: 600;
    font-size: 1rem;
    color: var(--color-text);
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}
.category-filter:hover {
    border-color: var(--color-primary);
    background: rgba(96,165,250,0.08);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(99,102,241,0.12);
}
.category-filter.active {
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    color: white;
    border-color: var(--color-primary);
    box-shadow: 0 4px 16px rgba(99,102,241,0.18);
    transform: translateY(-2px);
}

/* --- GENERAL POLISH --- */
.section-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: 10px;
}

/* --- FIXED MODAL IMAGE SIZING --- */
.product-image-large {
    width: 100%;
    height: 220px;
    border-radius: 12px;
    background: var(--color-bg-glass);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-light);
    overflow: hidden;
    position: relative;
    margin-bottom: 18px;
}
.product-image-large img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 12px;
} 

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
}

.modal-header h2 {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 0;
}

.modal-actions {
  display: flex;
  gap: 12px;
  align-items: center;
}

.btn-edit {
  background: #f8f9fa;
  color: #495057;
  border: 1px solid #dee2e6;
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 0.875rem;
  font-weight: 500;
  transition: all 0.2s ease;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
}

.btn-edit:hover, .btn-edit:focus {
  background: #e9ecef;
  border-color: #adb5bd;
  transform: translateY(-1px);
}

.modal-close {
  background: transparent;
  border: none;
  color: var(--color-text-light);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 50%;
  transition: background var(--transition), color var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-close:hover, .modal-close:focus {
  background: var(--color-primary);
  color: #fff;
}

/* Product Modal Content */
.product-modal-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
  margin-top: 20px;
}

.product-image-large {
  width: 100%;
  height: 350px;
  border-radius: 12px;
  background: #f7fafc;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #a0aec0;
  overflow: hidden;
  position: relative;
}

.product-image-large img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 12px;
}

.product-details {
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding: 0 10px;
}

.product-brand {
  font-size: 1.1rem;
  color: var(--color-primary);
  font-weight: 500;
  margin-bottom: 8px;
}

.product-price-large {
  font-size: 2.2rem;
  font-weight: 700;
  color: #38a169;
  margin: 8px 0;
}

.product-category-large {
  background: #667eea;
  color: white;
  padding: 8px 20px;
  border-radius: 25px;
  font-size: 0.95rem;
  font-weight: 600;
  display: inline-block;
  margin-bottom: 16px;
  align-self: flex-start;
}

.product-description-full {
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 16px;
  font-size: 1.05rem;
}

.product-stock-info {
  font-size: 0.95rem;
  color: var(--color-text-light);
  font-weight: 500;
}

.product-id {
  color: var(--color-text-light);
  font-size: 0.9rem;
  font-family: monospace;
  margin-top: 8px;
}

/* Product Stock */
.product-stock {
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-top: 8px;
  font-weight: 500;
}

/* Product Details in Modal */
.product-details {
  margin-top: 24px;
}

.product-details p {
  margin: 12px 0;
  line-height: 1.6;
  color: var(--color-text);
}

.product-details strong {
  color: var(--color-primary);
  font-weight: 600;
}

/* Responsive adjustments for auth */
@media (max-width: 768px) {
  .auth-container {
    padding: 24px;
    margin: 20px;
  }
  
  .header-actions {
    position: static;
    justify-content: center;
    margin-top: 16px;
  }
  
  .user-info {
    flex-direction: column;
    gap: 8px;
  }
  
  .product-modal-content {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .product-image-large {
    height: 200px;
  }
}

@media (max-width: 480px) {
  .auth-container {
    padding: 20px;
  }
  
  .auth-tabs {
    flex-direction: column;
  }
  
  .modal-actions {
    flex-direction: column;
    align-items: stretch;
  }
  
  .modal-actions .btn {
    width: 100%;
  }
} 

/* Enhanced Form Styles */
.form-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 16px;
}

.product-form {
  background: var(--color-bg-glass);
  backdrop-filter: blur(14px);
  padding: 40px 32px;
  border-radius: var(--radius);
  border: 2px solid var(--color-border);
  box-shadow: var(--color-card-shadow);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.product-form::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  margin-bottom: 28px;
}

.form-group {
  margin-bottom: 28px;
}

.form-group label {
  display: block;
  margin-bottom: 12px;
  font-weight: 600;
  color: var(--color-text);
  font-size: 1rem;
  transition: color var(--transition);
  position: relative;
}

.form-group label::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transition: width var(--transition);
}

.form-group:focus-within label::after {
  width: 100%;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 16px 20px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  background: var(--color-bg-glass);
  color: var(--color-text);
  transition: all var(--transition);
  font-family: inherit;
  min-height: 56px;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  background: rgba(96,165,250,0.05);
  box-shadow: 0 0 0 4px rgba(99,102,241,0.1);
  transform: translateY(-1px);
}

.form-group input::placeholder,
.form-group select::placeholder,
.form-group textarea::placeholder {
  color: var(--color-text-light);
  opacity: 0.7;
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
  line-height: 1.6;
}

.form-actions {
  display: flex;
  gap: 20px;
  justify-content: center;
  margin-top: 40px;
  padding-top: 32px;
  border-top: 2px solid var(--color-border);
  position: relative;
}

.form-actions::before {
  content: '';
  position: absolute;
  top: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  border-radius: 1px;
}

/* Enhanced Category Filters */
.categories-container {
  display: flex;
  flex-direction: row;
  gap: 32px;
  align-items: flex-start;
}

.category-filters {
  min-width: 200px;
  max-width: 250px;
  background: var(--color-bg-glass);
  padding: 24px 16px;
  border-radius: var(--radius);
  height: fit-content;
  border: 2px solid var(--color-border);
  box-shadow: var(--color-card-shadow);
  transition: all var(--transition);
  position: sticky;
  top: 20px;
}

.category-filters:hover {
  box-shadow: var(--color-card-shadow-hover);
  border-color: var(--color-primary);
}

.category-filter {
  display: block;
  width: 100%;
  padding: 14px 18px;
  margin-bottom: 12px;
  background: var(--color-bg-glass);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  text-align: left;
  font-weight: 600;
  font-size: 1rem;
  color: var(--color-text);
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
  position: relative;
  overflow: hidden;
}

.category-filter::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s;
}

.category-filter:hover::before {
  left: 100%;
}

.category-filter:hover {
  border-color: var(--color-primary);
  background: rgba(96,165,250,0.08);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(99,102,241,0.15);
}

.category-filter.active {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: white;
  border-color: var(--color-primary);
  box-shadow: 0 4px 16px rgba(99,102,241,0.25);
  transform: translateY(-2px);
}

.category-results {
  flex: 1;
  min-height: 400px;
  padding: 0 8px;
}

/* Enhanced Mobile Responsive Design */
@media (max-width: 900px) {
  .stats-bar {
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 16px;
  }
  
  .stat {
    padding: 24px 16px;
    min-height: 110px;
    min-width: 160px;
  }
  
  .stat-icon {
    font-size: 1.8rem;
    margin-bottom: 8px;
  }
  
  .stat-number {
    font-size: 1.6rem;
    padding: 0 4px;
  }
  
  .stat-label {
    font-size: 0.9rem;
  }
  
  .form-row {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .categories-container {
    flex-direction: column;
    gap: 20px;
  }
  
  .category-filters {
    min-width: 100%;
    max-width: 100%;
    position: static;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 16px;
  }
  
  .header {
    padding: 24px 20px 20px 20px;
    margin-bottom: 32px;
  }
  
  .header h1 {
    font-size: 2rem;
    gap: 12px;
  }
  
  .header p {
    font-size: 1rem;
  }
  
  .header-actions {
    gap: 12px;
  }
  
  .user-info {
    min-width: 140px;
    max-width: 180px;
    padding: 8px 12px;
  }
  
  .user-info span {
    font-size: 0.85rem;
  }
  
  .btn-sm {
    padding: 8px 12px;
    font-size: 0.8rem;
    min-height: 36px;
  }
  
  .theme-toggle {
    width: 40px;
    height: 40px;
    font-size: 1.1rem;
  }
  
  .nav {
    gap: 8px;
    margin-bottom: 20px;
    flex-wrap: wrap;
  }
  
  .nav-btn {
    padding: 12px 16px;
    font-size: 0.9rem;
    min-width: 100px;
    flex: 1;
    min-width: 0;
  }
  
  .section-header {
    flex-direction: column;
    gap: 12px;
    text-align: center;
    margin-bottom: 20px;
  }
  
  .section-header h2 {
    font-size: 1.4rem;
  }
  
  .section-header::after {
    left: 50%;
    transform: translateX(-50%);
  }
  
  .stats-bar {
    grid-template-columns: 1fr;
    gap: 12px;
    margin-bottom: 24px;
  }
  
  .stat {
    padding: 20px 16px;
    min-height: 100px;
  }
  
  .stat-icon {
    font-size: 1.6rem;
  }
  
  .stat-number {
    font-size: 1.4rem;
  }
  
  .search-box {
    flex-direction: column;
    gap: 12px;
  }
  
  .search-input {
    min-height: 48px;
    font-size: 0.95rem;
  }
  
  .form-actions {
    flex-direction: column;
    gap: 12px;
  }
  
  .btn {
    width: 100%;
    min-height: 48px;
    font-size: 0.95rem;
  }
  
  .products-grid {
    gap: 20px;
    padding: 0 4px;
  }
  
  .product-card {
    padding: 16px;
    margin: 0;
  }
  
  .product-image {
    height: 180px;
  }
  
  .product-info h3 {
    font-size: 1.1rem;
  }
  
  .product-price {
    font-size: 1.1rem;
  }
  
  .product-category {
    font-size: 0.8rem;
    padding: 4px 8px;
  }
  
  .btn-delete {
    padding: 6px 10px;
    font-size: 0.8rem;
  }
  
  .modal-content {
    width: 95%;
    padding: 20px;
    max-height: 85vh;
    margin: auto;
  }
  
  .product-modal-content {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .product-image-large {
    height: 200px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 12px;
  }
  
  .header {
    padding: 20px 16px 16px 16px;
    margin-bottom: 24px;
  }
  
  .header h1 {
    font-size: 1.8rem;
    gap: 10px;
  }
  
  .header h1 i {
    font-size: 1.6rem;
  }
  
  .header p {
    font-size: 0.9rem;
  }
  
  .header-content {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
  
  .header-actions {
    justify-content: center;
    gap: 16px;
  }
  
  .user-info {
    min-width: 120px;
    max-width: 160px;
    padding: 6px 10px;
  }
  
  .user-info span {
    font-size: 0.8rem;
  }
  
  .btn-sm {
    padding: 6px 10px;
    font-size: 0.75rem;
    min-height: 32px;
  }
  
  .theme-toggle {
    width: 36px;
    height: 36px;
    font-size: 1rem;
  }
  
  .nav {
    gap: 6px;
    margin-bottom: 16px;
  }
  
  .nav-btn {
    padding: 10px 12px;
    font-size: 0.85rem;
    min-width: 80px;
    flex: 1;
  }
  
  .nav-btn i {
    font-size: 0.9rem;
  }
  
  .section-header h2 {
    font-size: 1.3rem;
  }
  
  .stats-bar {
    gap: 10px;
  }
  
  .stat {
    padding: 16px 12px;
    min-height: 90px;
  }
  
  .stat-icon {
    font-size: 1.4rem;
    margin-bottom: 6px;
  }
  
  .stat-number {
    font-size: 1.2rem;
    padding: 0 2px;
  }
  
  .stat-label {
    font-size: 0.8rem;
  }
  
  .search-input {
    min-height: 44px;
    font-size: 0.9rem;
    padding: 12px 16px;
  }
  
  .btn {
    min-height: 44px;
    font-size: 0.9rem;
    padding: 12px 16px;
  }
  
  .products-grid {
    gap: 16px;
    padding: 0 2px;
  }
  
  .product-card {
    padding: 12px;
  }
  
  .product-image {
    height: 160px;
  }
  
  .product-info h3 {
    font-size: 1rem;
  }
  
  .product-description {
    font-size: 0.85rem;
  }
  
  .product-price {
    font-size: 1rem;
  }
  
  .product-category {
    font-size: 0.75rem;
    padding: 3px 6px;
  }
  
  .product-stock {
    font-size: 0.8rem;
  }
  
  .btn-delete {
    padding: 5px 8px;
    font-size: 0.75rem;
  }
  
  .modal-content {
    width: 98%;
    padding: 16px;
    max-height: 90vh;
  }
  
  .modal-header h2 {
    font-size: 1.4rem;
  }
  
  .modal-actions {
    gap: 8px;
  }
  
  .modal-actions .btn {
    padding: 8px 12px;
    font-size: 0.85rem;
  }
  
  .product-modal-content {
    gap: 16px;
  }
  
  .product-image-large {
    height: 180px;
  }
  
  .product-price-large {
    font-size: 1.8rem;
  }
  
  .product-category-large {
    font-size: 0.85rem;
    padding: 6px 12px;
  }
  
  .product-description-full {
    font-size: 0.9rem;
  }
  
  .auth-container {
    padding: 20px;
  }
  
  .auth-tabs {
    gap: 8px;
  }
  
  .auth-tab {
    padding: 10px 16px;
    font-size: 0.9rem;
  }
  
  .form-group input,
  .form-group select,
  .form-group textarea {
    padding: 10px 12px;
    font-size: 0.9rem;
  }
  
  .form-group label {
    font-size: 0.9rem;
  }
  
  .category-filter {
    padding: 10px 12px;
    font-size: 0.9rem;
  }
  
  .toast {
    top: 16px;
    right: 16px;
    padding: 12px 16px;
    font-size: 0.9rem;
    max-width: 300px;
  }
}

/* Extra Small Devices */
@media (max-width: 360px) {
  .container {
    padding: 8px;
  }
  
  .header {
    padding: 16px 12px 12px 12px;
  }
  
  .header h1 {
    font-size: 1.6rem;
  }
  
  .header p {
    font-size: 0.85rem;
  }
  
  .nav-btn {
    padding: 8px 10px;
    font-size: 0.8rem;
    min-width: 70px;
  }
  
  .stat {
    padding: 12px 8px;
    min-height: 80px;
  }
  
  .stat-number {
    font-size: 1.1rem;
  }
  
  .product-card {
    padding: 10px;
  }
  
  .product-image {
    height: 140px;
  }
  
  .modal-content {
    width: 99%;
    padding: 12px;
  }
}