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

/* Modern Design System Tokens */
:root {
  --bg-primary: #0b111e;
  --bg-secondary: #121b2d;
  --bg-tertiary: #1a263e;
  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  --accent-primary: #6366f1; /* Indigo */
  --accent-primary-glow: rgba(99, 102, 241, 0.15);
  --accent-secondary: #10b981; /* Emerald */
  --accent-secondary-glow: rgba(16, 185, 129, 0.15);
  --accent-warning: #f59e0b; /* Amber */
  --accent-danger: #ef4444; /* Rose */
  --border-color: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.15);
  
  --font-display: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-code: 'Fira Code', monospace;
  
  --glass-bg: rgba(18, 27, 45, 0.7);
  --glass-border: rgba(255, 255, 255, 0.06);
  --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  
  --sidebar-width: 280px;
  --adbar-width: 320px;
}

/* Reset & Global Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-smoothing: antialiased;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.5;
  overflow-x: hidden;
  background-image: 
    radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.08) 0px, transparent 50%),
    radial-gradient(at 100% 100%, rgba(16, 185, 129, 0.05) 0px, transparent 50%);
  background-attachment: fixed;
}

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

button, input, select, textarea {
  font-family: inherit;
  background: none;
  border: none;
  color: inherit;
}

button {
  cursor: pointer;
}

/* Layout Infrastructure */
.app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Global Header */
.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background-color: rgba(11, 17, 30, 0.8);
  border-bottom: 1px solid var(--border-color);
  height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-logo {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.5rem;
  color: #fff;
  box-shadow: 0 0 15px rgba(99, 102, 241, 0.4);
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.35rem;
  letter-spacing: -0.025em;
  background: linear-gradient(to right, #ffffff, #d1d5db);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.header-search {
  position: relative;
  width: 100%;
  max-width: 420px;
}

.header-search input {
  width: 100%;
  padding: 0.6rem 1rem 0.6rem 2.5rem;
  border-radius: var(--radius-full);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  font-size: 0.9rem;
  transition: var(--transition-normal);
}

.header-search input:focus {
  outline: none;
  border-color: var(--accent-primary);
  background-color: var(--bg-tertiary);
  box-shadow: 0 0 0 3px var(--accent-primary-glow);
}

.header-search::before {
  content: '🔍';
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.9rem;
  color: var(--text-muted);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-link-btn {
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition-fast);
}

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

/* Page Wrapper Structure */
.main-wrapper {
  display: flex;
  flex: 1;
  width: 100%;
  max-width: 1600px;
  margin: 0 auto;
  padding: 1.5rem 2rem;
  gap: 2rem;
}

/* Sidebar Navigation */
.app-sidebar {
  width: var(--sidebar-width);
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.sidebar-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--glass-shadow);
}

.sidebar-title {
  font-family: var(--font-display);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  font-weight: 700;
}

.sidebar-menu {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 0.85rem;
  border-radius: var(--radius-md);
  font-size: 0.925rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition-fast);
}

.sidebar-link:hover, .sidebar-link.active {
  color: var(--text-primary);
  background-color: var(--bg-tertiary);
  border-left: 3px solid var(--accent-primary);
}

/* Workspace Central Area */
.workspace-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  min-width: 0; /* Prevents overflow */
}

/* Dashboard Hero */
.hero-banner {
  padding: 2.5rem;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(16, 185, 129, 0.05) 100%);
  border: 1px solid var(--border-color);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero-banner::before {
  content: '';
  position: absolute;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, var(--accent-primary-glow) 0%, transparent 70%);
  top: -150px;
  left: -150px;
}

.hero-banner h1 {
  font-family: var(--font-display);
  font-size: 2.25rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
  background: linear-gradient(to right, #ffffff, #9ca3af);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-banner p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto;
}

/* Grid of Tools */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.tool-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  box-shadow: var(--glass-shadow);
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.tool-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(to right, var(--accent-primary), var(--accent-secondary));
  opacity: 0;
  transition: var(--transition-normal);
}

.tool-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  box-shadow: 0 12px 40px 0 rgba(0, 0, 0, 0.5);
}

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

.tool-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background-color: var(--bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--accent-primary);
  border: 1px solid var(--border-color);
}

.tool-card:hover .tool-icon {
  background-color: var(--accent-primary-glow);
  color: #fff;
  border-color: var(--accent-primary);
}

.tool-info h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
  color: #fff;
}

.tool-info p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

.tool-badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  background-color: var(--accent-secondary-glow);
  color: var(--accent-secondary);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

/* Tool Main Workspace Shell */
.tool-workspace {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--glass-shadow);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.tool-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1.25rem;
}

.tool-title-area {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.tool-title-area h2 {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  color: #fff;
}

/* Workspace Input & Output layouts */
.workspace-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

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

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.panel-title {
  font-family: var(--font-display);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  font-weight: 600;
}

.textarea-container {
  position: relative;
  width: 100%;
}

.tool-textarea {
  width: 100%;
  height: 380px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
  color: var(--text-primary);
  font-family: var(--font-code);
  font-size: 0.875rem;
  resize: vertical;
  line-height: 1.5;
  transition: var(--transition-normal);
}

.tool-textarea:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-primary-glow);
}

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

/* Panel Buttons & Actions */
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
  transition: var(--transition-fast);
}

.btn-primary {
  background-color: var(--accent-primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  background-color: #5558e0;
  transform: translateY(-1px);
}

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

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

.btn-success {
  background-color: var(--accent-secondary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.3);
}

.btn-success:hover {
  background-color: #0d9668;
}

/* Form Controls & Inputs */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.form-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.form-input, .form-select {
  width: 100%;
  padding: 0.65rem 1rem;
  border-radius: var(--radius-md);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-size: 0.9rem;
  transition: var(--transition-normal);
}

.form-input:focus, .form-select:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-primary-glow);
}

/* SEO Instruction Block underneath active tool */
.tool-seo-content {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  box-shadow: var(--glass-shadow);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.tool-seo-content h2 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  color: #fff;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.75rem;
}

.tool-seo-content h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: 0.5rem;
}

.tool-seo-content p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.tool-seo-content ul, .tool-seo-content ol {
  padding-left: 1.5rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

.tool-seo-content li {
  margin-bottom: 0.5rem;
}

/* Strategic Ad Column (Right) */
.app-adbar {
  width: var(--adbar-width);
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.ad-card {
  background: rgba(18, 27, 45, 0.4);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 250px;
  position: relative;
  overflow: hidden;
  text-align: center;
}

.ad-label {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  font-size: 0.65rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
}

.ad-placeholder-text {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
}

/* Footer Section */
.app-footer {
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-primary);
  padding: 2.5rem 2rem;
  margin-top: auto;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1600px;
  margin: 0 auto;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer-text {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.footer-link {
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: var(--transition-fast);
}

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

/* Global Notification Badge / Error States */
.alert {
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.alert-success {
  background-color: var(--accent-secondary-glow);
  color: var(--accent-secondary);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.alert-danger {
  background-color: rgba(239, 68, 68, 0.1);
  color: var(--accent-danger);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

/* Responsive Infrastructure modifications */
@media (max-width: 1280px) {
  .app-adbar {
    display: none; /* Hide right adbar on tablets and smaller to prioritize workspace */
  }
}

@media (max-width: 992px) {
  .main-wrapper {
    flex-direction: column;
    padding: 1rem;
  }
  .app-sidebar {
    width: 100%;
  }
  .sidebar-card {
    padding: 1rem;
  }
}

@media (max-width: 640px) {
  .app-header {
    padding: 0 1rem;
    height: auto;
    flex-direction: column;
    gap: 1rem;
    padding-top: 1rem;
    padding-bottom: 1rem;
  }
  .header-search {
    max-width: 100%;
  }
}