/* 
  AIKARUVI.COM - Global Stylesheet
  Clean, Premium CSS Design System
*/

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800&display=swap');

/* --- Design Tokens / CSS Variables --- */
:root {
  /* Colors */
  --color-primary: #4f46e5;       /* Premium Indigo */
  --color-primary-hover: #4338ca; /* Darker Indigo */
  --color-primary-light: #e0e7ff; /* Very Light Indigo */
  
  --color-neutral-dark: #0f172a;  /* Slate 900 */
  --color-neutral-muted: #475569; /* Slate 600 */
  --color-neutral-light: #f8fafc; /* Slate 50 */
  --color-neutral-border: #e2e8f0;/* Slate 200 */
  --color-white: #ffffff;
  
  --color-success: #10b981;       /* Emerald 500 */
  --color-success-light: #ecfdf5; /* Emerald 50 */
  --color-error: #ef4444;         /* Red 500 */
  --color-error-light: #fef2f2;   /* Red 50 */

  /* Typography */
  --font-family-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-family-heading: 'Outfit', sans-serif;
  
  /* Layout & Spacing */
  --max-width: 1200px;
  --header-height: 72px;
  --border-radius-sm: 6px;
  --border-radius-md: 12px;
  --border-radius-lg: 24px;
  
  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.02);
  --shadow-premium: 0 20px 25px -5px rgba(79, 70, 229, 0.07), 0 10px 10px -5px rgba(79, 70, 229, 0.03);
  
  /* Animations */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family-body);
  background-color: var(--color-white);
  color: var(--color-neutral-dark);
  line-height: 1.6;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-heading);
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-neutral-dark);
}

h1 {
  font-size: 2.5rem;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 2rem;
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.5rem;
}

p {
  color: var(--color-neutral-muted);
  font-size: 1rem;
}

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

a:hover {
  color: var(--color-primary-hover);
}

ul, ol {
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* --- Layout Components --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.section {
  padding: 6rem 0;
}

.section-alt {
  padding: 6rem 0;
  background-color: var(--color-neutral-light);
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: center;
}

.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

/* --- Sticky Header (Apple Style) --- */
.header {
  position: sticky;
  top: 0;
  height: var(--header-height);
  width: 100%;
  background-color: rgba(22, 22, 23, 0.8); /* Apple Dark Translucent */
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  z-index: 1000;
  display: flex;
  align-items: center;
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.logo {
  font-family: var(--font-family-heading);
  font-size: 1.8rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  display: flex;
  align-items: center;
  gap: 0.2rem;
}

.logo-text {
  background: linear-gradient(135deg, #818cf8 0%, #c084fc 50%, #db2777 100%); /* Slightly brighter for dark background */
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
}

.logo-dot {
  width: 8px;
  height: 8px;
  background-color: #db2777;
  border-radius: 50%;
  display: inline-block;
}

.nav-menu {
  display: none; /* Mobile first, shown on desktop */
}

.nav-item {
  font-weight: 400;
  color: #c8c8c9; /* Apple gray */
  font-size: 0.85rem;
  letter-spacing: -0.01em;
  transition: color var(--transition-fast);
}

.nav-item:hover, .nav-item.active {
  color: var(--color-white);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.header #nav-login-btn {
  color: #c8c8c9;
  border: none;
  background: none;
  font-weight: 500;
  padding: 0;
}

.header #nav-login-btn:hover {
  color: var(--color-white);
}

/* Mobile Nav Toggle */
.mobile-nav-toggle {
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
}

.mobile-nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background-color: var(--color-neutral-dark);
  border-radius: 1px;
  transition: all var(--transition-fast);
}

/* Active State for Hamburger */
.mobile-nav-toggle.open span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.mobile-nav-toggle.open span:nth-child(2) {
  opacity: 0;
}

.mobile-nav-toggle.open span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* Dropdown Menu for Mobile */
.mobile-menu {
  position: fixed;
  top: var(--header-height);
  left: 0;
  width: 100%;
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-neutral-border);
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  transform: translateY(-150%);
  transition: transform var(--transition-normal);
  z-index: 999;
  box-shadow: var(--shadow-lg);
}

.mobile-menu.open {
  transform: translateY(0);
}

.mobile-menu a {
  font-family: var(--font-family-heading);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-neutral-dark);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-family-body);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-normal);
  text-align: center;
}

.btn-primary {
  background: linear-gradient(135deg, #4f46e5 0%, #8b5cf6 50%, #db2777 100%);
  color: var(--color-white);
  border: none;
}

.btn-primary:hover {
  background: linear-gradient(135deg, #4338ca 0%, #7c3aed 50%, #be185d 100%);
  color: var(--color-white);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/* --- Text Gradient Utility --- */
.text-gradient {
  background: linear-gradient(135deg, #4f46e5 0%, #9333ea 50%, #db2777 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
}

.btn-secondary {
  background-color: var(--color-white);
  border-color: var(--color-neutral-border);
  color: var(--color-neutral-dark);
}

.btn-secondary:hover {
  background-color: var(--color-neutral-light);
  border-color: var(--color-neutral-muted);
  color: var(--color-neutral-dark);
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1.1rem;
}

/* --- Forms & Inputs --- */
.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
  color: var(--color-neutral-dark);
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--font-family-body);
  font-size: 0.95rem;
  color: var(--color-neutral-dark);
  background-color: var(--color-white);
  border: 1px solid var(--color-neutral-border);
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

.form-control::placeholder {
  color: #a1a1aa;
}

/* --- Cards --- */
.card {
  background-color: var(--color-white);
  border: 1px solid var(--color-neutral-border);
  border-radius: var(--border-radius-md);
  padding: 2.5rem;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.card-hover:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-premium);
  border-color: var(--color-primary-light);
}

/* --- Alerts & Notifications --- */
.alert {
  padding: 1rem 1.25rem;
  border-radius: var(--border-radius-sm);
  margin-bottom: 1.5rem;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  border: 1px solid transparent;
}

.alert-success {
  background-color: var(--color-success-light);
  border-color: #a7f3d0;
  color: #065f46;
}

.alert-error {
  background-color: var(--color-error-light);
  border-color: #fca5a5;
  color: #991b1b;
}

/* --- Premium Badges --- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 9999px;
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}

/* --- Hero Section Styling (Apple Centered Style) --- */
.hero {
  text-align: center;
  padding: 8rem 0 4rem 0;
  background: radial-gradient(circle at 50% 100%, rgba(224, 231, 255, 0.25) 0%, rgba(255, 255, 255, 0) 70%);
}

.hero-content-centered {
  max-width: 840px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-content-centered h1 {
  font-size: 3.5rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.15;
  margin-top: 1rem;
}

.hero-content-centered .hero-subtitle {
  font-size: 1.35rem;
  color: var(--color-neutral-muted);
  margin-top: 1.5rem;
  margin-bottom: 2.5rem;
  max-width: 680px;
  line-height: 1.5;
}

.hero-content-centered .hero-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 4rem;
}

.btn-link {
  font-weight: 600;
  color: #4f46e5;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 1.05rem;
  transition: all var(--transition-fast);
}

.btn-link:hover {
  color: var(--color-primary-hover);
}

.btn-link .chevron {
  transition: transform var(--transition-fast);
}

.btn-link:hover .chevron {
  transform: translateX(3px);
}

.product-preview-centered {
  max-width: 960px;
  width: 100%;
  margin: 0 auto;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.1), 0 10px 20px rgba(0, 0, 0, 0.05); /* Deep Apple-style shadows */
  border: 1px solid var(--color-neutral-border);
  background-color: var(--color-white);
  aspect-ratio: 16/10;
  display: flex;
  flex-direction: column;
  transform: translateY(30px);
  opacity: 0;
  animation: slideUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.1s forwards;
}

@keyframes slideUp {
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

/* --- Product Preview Graphic Placeholder --- */
.product-preview {
  position: relative;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-neutral-border);
  background-color: var(--color-white);
  aspect-ratio: 16/10;
  display: flex;
  flex-direction: column;
}

.preview-header {
  height: 40px;
  background-color: var(--color-neutral-light);
  border-bottom: 1px solid var(--color-neutral-border);
  display: flex;
  align-items: center;
  padding: 0 1rem;
  gap: 0.35rem;
}

.preview-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: #cbd5e1;
}

.preview-dot:nth-child(1) { background-color: #f87171; }
.preview-dot:nth-child(2) { background-color: #fbbf24; }
.preview-dot:nth-child(3) { background-color: #34d399; }

.preview-body {
  flex-grow: 1;
  display: flex;
  background-color: #fafafa;
  padding: 1.5rem;
  gap: 1.5rem;
}

.preview-sidebar {
  width: 30%;
  background-color: var(--color-white);
  border: 1px solid var(--color-neutral-border);
  border-radius: var(--border-radius-sm);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.preview-main {
  width: 70%;
  background-color: var(--color-white);
  border: 1px solid var(--color-neutral-border);
  border-radius: var(--border-radius-sm);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  border-style: dashed;
  border-color: #cbd5e1;
}

.line-skeleton {
  height: 8px;
  background-color: #e2e8f0;
  border-radius: 4px;
}

/* --- Footer --- */
.footer {
  background-color: var(--color-neutral-dark);
  color: #94a3b8;
  padding: 5rem 0 2rem 0;
  border-top: 1px solid #1e293b;
}

.footer h3 {
  color: var(--color-white);
  margin-bottom: 1.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  margin-bottom: 4rem;
}

.footer-brand p {
  color: #94a3b8;
  margin-top: 1rem;
  max-width: 300px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links a {
  color: #94a3b8;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-white);
}

.footer-bottom {
  border-top: 1px solid #1e293b;
  padding-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
}

/* --- Pricing Styling --- */
.price-tag {
  font-size: 3rem;
  font-weight: 800;
  color: var(--color-neutral-dark);
  margin: 1.5rem 0;
  display: flex;
  align-items: baseline;
}

.price-tag span {
  font-size: 1rem;
  color: var(--color-neutral-muted);
  font-weight: 500;
}

.pricing-features {
  margin: 2rem 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.95rem;
}

.pricing-features li::before {
  content: '✓';
  color: var(--color-success);
  font-weight: bold;
}

.pricing-card-popular {
  border: 2px solid var(--color-primary);
  position: relative;
}

.pricing-popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: 0.25rem 1rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* --- Dashboard Specific Styles --- */
.dashboard-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  padding-top: 3rem;
  padding-bottom: 5rem;
}

.sidebar-panel {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.user-profile-box {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.user-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  font-family: var(--font-family-heading);
  font-weight: 700;
  font-size: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.credit-display {
  background-color: var(--color-primary-light);
  border: 1px solid rgba(79, 70, 229, 0.2);
  border-radius: var(--border-radius-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.credit-balance {
  font-size: 2.5rem;
  font-family: var(--font-family-heading);
  font-weight: 800;
  background: linear-gradient(135deg, #4f46e5 0%, #9333ea 50%, #db2777 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
  line-height: 1;
}

/* Drag and Drop Upload Area */
.upload-zone {
  border: 2px dashed #cbd5e1;
  border-radius: var(--border-radius-md);
  padding: 3rem 1.5rem;
  text-align: center;
  background-color: var(--color-neutral-light);
  cursor: pointer;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.upload-zone.dragover {
  border-color: var(--color-primary);
  background-color: var(--color-primary-light);
  opacity: 0.9;
}

.upload-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background-color: var(--color-white);
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-neutral-muted);
  font-size: 1.75rem;
  transition: all var(--transition-normal);
}

.upload-zone:hover .upload-icon {
  color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* History logs list */
.history-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.history-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  border: 1px solid var(--color-neutral-border);
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.history-item:hover {
  background-color: var(--color-neutral-light);
  border-color: var(--color-neutral-muted);
}

.history-details {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.history-filename {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-neutral-dark);
}

.history-date {
  font-size: 0.8rem;
  color: var(--color-neutral-muted);
}

/* Output visualization area */
.output-display {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.output-raw {
  background-color: var(--color-neutral-light);
  border: 1px solid var(--color-neutral-border);
  border-radius: var(--border-radius-sm);
  padding: 1.5rem;
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.85rem;
  overflow-x: auto;
  white-space: pre-wrap;
  max-height: 400px;
}

/* --- Spinner for PDF Processing --- */
.spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--color-primary-light);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* --- Media Queries for Responsive Design --- */
@media (min-width: 768px) {
  h1 {
    font-size: 3.5rem;
  }

  h2 {
    font-size: 2.5rem;
  }

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

  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }

  .mobile-nav-toggle {
    display: none;
  }

  .nav-menu {
    display: flex;
    align-items: center;
    gap: 2.5rem;
  }

  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }

  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
  }
}

@media (min-width: 1024px) {
  .dashboard-grid {
    grid-template-columns: 280px 1fr;
  }
}