/* ===================================
   CSS Custom Properties (Design Tokens)
   =================================== */
:root {
  /* Colors */
  --color-bg-primary: #0a0a0f;
  --color-bg-secondary: #12121a;
  --color-bg-card: #1a1a25;
  --color-bg-hover: #22222f;

  --color-text-primary: #ffffff;
  --color-text-secondary: #a0a0b0;
  --color-text-muted: #606070;

  --color-accent-primary: #6366f1;
  --color-accent-secondary: #8b5cf6;
  --color-accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);

  --color-success: #22c55e;
  --color-warning: #f59e0b;
  --color-error: #ef4444;

  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-hover: rgba(255, 255, 255, 0.15);

  /* Typography */
  --font-family:
    "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-md: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;

  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.2);
  --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.3);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms ease;
}

/* ===================================
   Reset & Base Styles
   =================================== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-md);
  line-height: 1.6;
  color: var(--color-text-primary);
  background: var(--color-bg-primary);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* Background gradient effect */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 60vh;
  background: radial-gradient(
    ellipse at top,
    rgba(99, 102, 241, 0.15) 0%,
    transparent 60%
  );
  pointer-events: none;
  z-index: -1;
}

/* ===================================
   Typography
   =================================== */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 600;
  line-height: 1.3;
}

a {
  color: var(--color-accent-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-accent-secondary);
}

/* ===================================
   Layout
   =================================== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.main-content {
  padding-top: 80px;
  min-height: 100vh;
}

/* ===================================
   Navigation
   =================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 70px;
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-8);
  z-index: 100;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.logo {
  font-size: var(--font-size-2xl);
}

.brand-name {
  font-size: var(--font-size-xl);
  font-weight: 700;
  background: var(--color-accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  gap: var(--space-2);
}

.nav-link {
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-full);
  color: var(--color-text-secondary);
  font-weight: 500;
  transition: all var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-text-primary);
  background: var(--color-bg-hover);
}

.nav-link.active {
  color: var(--color-text-primary);
  background: var(--color-accent-gradient);
}

/* ===================================
   Page Sections
   =================================== */
.page {
  display: none;
  padding: var(--space-10) 0;
  animation: fadeIn 0.3s ease;
}

.page.active {
  display: block;
}

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

/* Hero Section */
.hero {
  text-align: center;
  margin-bottom: var(--space-12);
}

.title {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  margin-bottom: var(--space-4);
  background: linear-gradient(135deg, #fff 0%, #a0a0b0 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
}

/* ===================================
   Cards
   =================================== */
.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition: all var(--transition-normal);
}

.card:hover {
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-lg);
}

.card-title {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-6);
  color: var(--color-text-primary);
}

/* ===================================
   Generator Layout
   =================================== */
.generator-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  align-items: start;
}

@media (max-width: 900px) {
  .generator-layout {
    grid-template-columns: 1fr;
  }
}

/* ===================================
   Forms
   =================================== */
.form-group {
  margin-bottom: var(--space-6);
}

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}

.form-input {
  width: 100%;
  padding: var(--space-4);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-size: var(--font-size-md);
  font-family: inherit;
  transition: all var(--transition-fast);
}

.form-input:focus {
  outline: none;
  border-color: var(--color-accent-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

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

.form-hint {
  display: block;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-2);
}

.form-select {
  appearance: none;
  padding: var(--space-3) var(--space-10) var(--space-3) var(--space-4);
  background: var(--color-bg-secondary)
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23a0a0b0' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E")
    no-repeat right var(--space-4) center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-size: var(--font-size-sm);
  cursor: pointer;
}

/* Type Selector */
.type-selector {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-3);
}

.type-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4);
  background: var(--color-bg-secondary);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.type-btn:hover {
  border-color: var(--color-border-hover);
  color: var(--color-text-primary);
}

.type-btn.active {
  border-color: var(--color-accent-primary);
  background: rgba(99, 102, 241, 0.1);
  color: var(--color-text-primary);
}

.type-icon {
  font-size: var(--font-size-2xl);
}

.type-text {
  font-size: var(--font-size-xs);
  font-weight: 500;
}

/* ===================================
   Buttons
   =================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-6);
  font-size: var(--font-size-md);
  font-weight: 500;
  font-family: inherit;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-primary {
  background: var(--color-accent-gradient);
  color: white;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.btn-secondary {
  background: var(--color-bg-hover);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background: var(--color-bg-card);
  border-color: var(--color-border-hover);
}

.btn-outline {
  background: transparent;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}

.btn-outline:hover {
  background: var(--color-bg-hover);
  color: var(--color-text-primary);
}

.btn-block {
  width: 100%;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

/* ===================================
   QR Preview
   =================================== */
.qr-preview-card {
  position: sticky;
  top: 90px;
}

.qr-preview {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 300px;
  background: white;
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-6);
  overflow: hidden;
}

.qr-preview img {
  max-width: 100%;
  height: auto;
}

.qr-placeholder {
  text-align: center;
  color: var(--color-text-muted);
}

.placeholder-icon {
  font-size: 60px;
  display: block;
  margin-bottom: var(--space-4);
  opacity: 0.3;
}

.qr-actions {
  display: flex;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.qr-actions .btn {
  flex: 1;
}

.qr-info {
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-6);
}

.info-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-3);
  font-size: var(--font-size-sm);
}

.info-label {
  color: var(--color-text-muted);
}

.info-value {
  color: var(--color-text-primary);
  word-break: break-all;
}

.status-active {
  color: var(--color-success);
}

.status-inactive {
  color: var(--color-error);
}

.status-expired {
  color: var(--color-warning);
}

/* ===================================
   Dashboard
   =================================== */
.dashboard-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-8);
  flex-wrap: wrap;
  gap: var(--space-4);
}

.dashboard-actions {
  display: flex;
  gap: var(--space-4);
}

/* QR List */
.qr-list {
  display: grid;
  gap: var(--space-4);
}

.qr-item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: var(--space-6);
  align-items: center;
  padding: var(--space-5);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
}

.qr-item:hover {
  border-color: var(--color-border-hover);
  transform: translateX(4px);
}

.qr-item-preview {
  width: 60px;
  height: 60px;
  background: white;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.qr-item-preview img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.qr-item-info h3 {
  font-size: var(--font-size-md);
  margin-bottom: var(--space-1);
}

.qr-item-meta {
  display: flex;
  gap: var(--space-4);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.qr-item-actions {
  display: flex;
  gap: var(--space-2);
}

/* Stats Badge */
.stats-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
}

/* Loading State */
.loading-state {
  text-align: center;
  padding: var(--space-12);
  color: var(--color-text-muted);
}

.loader {
  display: inline-block;
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-accent-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: var(--space-4);
}

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

/* Empty State */
.empty-state {
  text-align: center;
  padding: var(--space-12);
}

.empty-icon {
  font-size: 60px;
  display: block;
  margin-bottom: var(--space-4);
  opacity: 0.3;
}

/* Pagination */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-4);
  margin-top: var(--space-8);
}

.page-info {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

/* ===================================
   Toast Notifications
   =================================== */
.toast {
  position: fixed;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-6);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transition: all var(--transition-normal);
  z-index: 200;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

.toast.success {
  border-color: var(--color-success);
}
.toast.error {
  border-color: var(--color-error);
}

/* ===================================
   Modal
   =================================== */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 300;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.modal.show {
  opacity: 1;
  visibility: visible;
}

.modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
}

.modal-content {
  position: relative;
  width: 90%;
  max-width: 600px;
  max-height: 90vh;
  overflow-y: auto;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
}

.modal-close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-secondary);
  border: none;
  border-radius: var(--radius-full);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.modal-close:hover {
  background: var(--color-bg-hover);
  color: var(--color-text-primary);
}

/* ===================================
   Utility Classes
   =================================== */
.hidden {
  display: none !important;
}

.text-center {
  text-align: center;
}

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

/* Toggle Switch */
.toggle {
  position: relative;
  width: 44px;
  height: 24px;
  background: var(--color-bg-secondary);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.toggle.active {
  background: var(--color-success);
  border-color: var(--color-success);
}

.toggle::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 18px;
  background: white;
  border-radius: 50%;
  transition: all var(--transition-fast);
}

.toggle.active::after {
  left: 22px;
}

/* ===================================
   Responsive Adjustments
   =================================== */
@media (max-width: 768px) {
  .navbar {
    padding: 0 var(--space-4);
  }

  .title {
    font-size: var(--font-size-3xl);
  }

  .type-selector {
    grid-template-columns: repeat(2, 1fr);
  }

  .qr-item {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .qr-item-preview {
    margin: 0 auto;
  }

  .qr-item-meta {
    justify-content: center;
  }

  .qr-item-actions {
    justify-content: center;
  }

  .dashboard-header {
    flex-direction: column;
    text-align: center;
  }
}

/* ===================================
    Mobile Responsive & Modern UI Enhancements
   =================================== */

/* Glassmorphism for Cards */
.card {
  background: rgba(26, 26, 37, 0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

/* Modern Inputs */
.form-input, .form-select {
  background: rgba(18, 18, 26, 0.6);
  backdrop-filter: blur(4px);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.form-input:focus {
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.15);
}

/* Mobile Adjustments */
@media (max-width: 768px) {
  /* Navigation */
  .navbar {
    padding: 0 var(--space-4);
    height: 60px;
  }
  
  .nav-brand .brand-name {
    font-size: 1.25rem;
  }
  
  .nav-links {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--color-bg-card);
    padding: var(--space-3);
    justify-content: space-around;
    border-top: 1px solid var(--color-border);
    z-index: 1000;
  }
  
  .nav-link {
    font-size: 0.75rem;
    padding: var(--space-2) var(--space-4);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
  }
  
  .user-menu {
    border-left: none !important;
    margin-left: 0 !important;
    padding-left: 0 !important;
  }
  
  #userDisplay {
    display: none; /* Hide name on mobile to save space */
  }

  /* Main Content Spacing */
  .main-content {
    padding-top: 60px;
    padding-bottom: 80px; /* Space for bottom nav */
  }
  
  .container {
    padding: 0 var(--space-4);
  }
  
  /* Typography */
  .title {
    font-size: 2rem;
  }
  
  /* Generator Layout */
  .generator-layout {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
  
  /* Type Selector - Scrollable on mobile */
  .type-selector {
    display: flex;
    overflow-x: auto;
    padding-bottom: var(--space-2);
    gap: var(--space-3);
    -webkit-overflow-scrolling: touch;
  }
  
  .type-btn {
    min-width: 80px;
    flex-shrink: 0;
  }
  
  /* Touch Targets */
  .btn, .form-input, .type-btn {
    min-height: 48px; /* Easier to tap */
  }
  
  /* Dashboard */
  .dashboard-header {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-4);
  }
  
  .dashboard-actions {
    flex-direction: column;
  }
  
  .qr-item {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--space-4);
  }
  
  .qr-item-preview {
    margin: 0 auto;
    width: 100px;
    height: 100px;
  }
  
  .qr-item-meta {
    justify-content: center;
    flex-wrap: wrap;
  }
  
  .qr-item-actions {
    justify-content: center;
    width: 100%;
  }
  
  .qr-item-actions .btn {
    flex: 1;
  }
  
  /* Modal */
  .modal-content {
    width: 95%;
    padding: var(--space-4);
    max-height: 85vh;
  }
}


/* ===================================
    Fix Mobile Spacing Issues
   =================================== */

.seo-content {
  margin-top: 4rem;
  padding-top: 4rem;
  border-top: 1px solid var(--color-border);
}

@media (max-width: 768px) {
  /* Reduce Top/Bottom Spacing */
  .page {
    padding-top: var(--space-4);
    padding-bottom: var(--space-4);
  }

  .hero {
    margin-bottom: var(--space-6);
  }

  .title {
    font-size: 1.75rem; /* Smaller title */
    margin-bottom: var(--space-2);
  }

  .subtitle {
    font-size: 1rem;
    margin-bottom: var(--space-4);
  }

  /* SEO Section Spacing */
  .seo-content {
    margin-top: 2rem;
    padding-top: 2rem;
  }
  
  /* Reduce Grid Gaps */
  .generator-layout {
    gap: var(--space-4);
  }
  
  .seo-content .card > div {
    gap: 1rem !important; /* Force smaller gap in features grid */
  }
}