/* TypeForgeX Premium Design System */
:root {
  --bg-primary: #09090b;
  --bg-secondary: #18181b;
  --bg-tertiary: #27272a;
  --text-primary: #fafafa;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  --accent: #ef4444;
  --accent-hover: #dc2626;
  --accent-glow: rgba(239, 68, 68, 0.3);
  --border: #27272a;
  --border-hover: #3f3f46;
  --radius: 12px;
  --radius-lg: 16px;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.4);
  --transition: all 0.2s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ===== NAVIGATION ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(9, 9, 11, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-primary);
}

.logo-img {
  width: 32px;
  height: 32px;
  object-fit: contain;
  border-radius: 6px;
}

.logo-icon {
  font-size: 24px;
}

.logo-text {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.logo-accent {
  color: var(--accent);
}

.nav-links {
  display: flex;
  gap: 8px;
}

.nav-link {
  padding: 8px 16px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  border-radius: 8px;
  transition: var(--transition);
}

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

/* ===== HERO ===== */
.hero {
  padding: 140px 24px 60px;
  text-align: center;
  background: radial-gradient(ellipse at center top, rgba(239, 68, 68, 0.08) 0%, transparent 60%);
}

.hero-container {
  max-width: 800px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.hero-title {
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -2px;
  margin-bottom: 20px;
}

/* Fade-In Effect */
.hero-title .typing-line {
  display: inline-block;
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1), transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.hero-title .typing-line.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Gradient Text */
.gradient-text {
  background: linear-gradient(135deg, var(--accent) 0%, #f97316 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Subtitle */
.hero-subtitle {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto;
  line-height: 1.6;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.hero-subtitle.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Suggestion Status */
.suggestion-status {
  text-align: center;
  font-size: 14px;
  margin-top: 12px;
  min-height: 20px;
  transition: all 0.3s ease;
}

.suggestion-status.success {
  color: #22c55e;
}

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

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

/* ===== TOOL SECTION ===== */
.tool-section {
  padding: 40px 24px 80px;
}

.tool-container {
  max-width: 1200px;
  margin: 0 auto;
}

.tool-wrapper {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 20px;
  align-items: stretch;
}

.tool-panel {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
}

.tool-panel:hover {
  border-color: var(--border-hover);
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-tertiary);
}

.panel-label {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
}

.clear-btn,
.copy-all-btn {
  padding: 6px 12px;
  font-size: 12px;
  font-weight: 500;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}

.clear-btn:hover,
.copy-all-btn:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.tool-textarea {
  width: 100%;
  min-height: 300px;
  padding: 20px;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 16px;
  line-height: 1.7;
  resize: vertical;
  outline: none;
}

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

.tool-textarea.output {
  background: var(--bg-primary);
  cursor: default;
}

.tool-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
}

.quick-actions {
  display: flex;
  gap: 12px;
  margin-top: 20px;
  justify-content: center;
}

.action-btn {
  padding: 12px 24px;
  font-size: 14px;
  font-weight: 500;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}

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

/* ===== SECTIONS ===== */
.section-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-title {
  font-size: 32px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 12px;
  letter-spacing: -1px;
}

.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 40px;
}

/* ===== FEATURES ===== */
.features-section {
  padding: 80px 0;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.features-section .section-title {
  margin-bottom: 50px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  padding: 32px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: var(--transition);
}

.feature-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 20px 40px -10px var(--accent-glow);
}

.feature-icon {
  font-size: 32px;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===== HOW IT WORKS ===== */
.how-section {
  padding: 80px 0;
}

.how-section .section-title {
  margin-bottom: 50px;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.step-card {
  text-align: center;
  padding: 40px 32px;
}

.step-number {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 20px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent) 0%, #f97316 100%);
  border-radius: 50%;
  color: white;
}

.step-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.step-card p {
  font-size: 14px;
  color: var(--text-secondary);
}

/* ===== USE CASES ===== */
.usecases-section {
  padding: 80px 0;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.usecases-section .section-title {
  margin-bottom: 50px;
}

.usecases-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.usecase-card {
  padding: 28px 24px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: var(--transition);
}

.usecase-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.usecase-icon {
  font-size: 36px;
  margin-bottom: 16px;
}

.usecase-card h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.usecase-card p {
  font-size: 13px;
  color: var(--text-secondary);
}

/* ===== SUGGESTION ===== */
.suggestion-section {
  padding: 80px 0;
}

.suggestion-section .section-title {
  margin-bottom: 8px;
}

.suggestion-box {
  display: flex;
  gap: 12px;
  max-width: 500px;
  margin: 0 auto;
}

#suggestion-box {
  flex: 1;
  padding: 14px 18px;
  font-size: 15px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  outline: none;
  transition: var(--transition);
}

#suggestion-box:focus {
  border-color: var(--accent);
}

#suggestion-box::placeholder {
  color: var(--text-muted);
}

#submit-suggestion {
  padding: 14px 28px;
  font-size: 15px;
  font-weight: 600;
  background: var(--accent);
  border: none;
  border-radius: var(--radius);
  color: white;
  cursor: pointer;
  transition: var(--transition);
}

#submit-suggestion:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

/* ===== COMMENTS ===== */
.comments-section {
  padding: 80px 0;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
}

.comments-section .section-title {
  margin-bottom: 40px;
}

#giscus-container {
  max-width: 800px;
  margin: 0 auto;
}

.giscus-loading {
  text-align: center;
  padding: 60px;
  color: var(--text-muted);
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  margin: 0 auto 16px;
  animation: spin 1s linear infinite;
}

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

.giscus-placeholder {
  text-align: center;
  padding: 60px;
  background: var(--bg-primary);
  border: 1px dashed var(--border);
  border-radius: var(--radius-lg);
  color: var(--text-secondary);
}

.giscus-placeholder a {
  color: var(--accent);
  text-decoration: none;
}

.giscus-placeholder a:hover {
  text-decoration: underline;
}

.giscus-setup {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 8px;
}

/* ===== FOOTER ===== */
.footer {
  padding: 60px 24px 30px;
  border-top: 1px solid var(--border);
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-brand {
  margin-bottom: 40px;
}

.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.footer-logo .logo-img {
  width: 28px;
  height: 28px;
}

.footer-tagline {
  font-size: 14px;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 80px;
  margin-bottom: 40px;
}

.footer-col h4 {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--text-secondary);
  text-decoration: none;
  margin-bottom: 10px;
  transition: var(--transition);
}

.footer-col a:hover {
  color: var(--text-primary);
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.footer-bottom p {
  font-size: 13px;
  color: var(--text-muted);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .usecases-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .hero {
    padding: 120px 24px 40px;
  }

  .hero-title {
    font-size: 36px;
    letter-spacing: -1px;
  }

  .hero-title .typing-line {
    opacity: 0;
    transform: translateY(25px);
    transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
  }

  .hero-title .typing-line.visible {
    opacity: 1;
    transform: translateY(0);
  }

  .tool-wrapper {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .tool-arrow {
    transform: rotate(90deg);
    padding: 10px 0;
  }

  .tool-textarea {
    min-height: 200px;
  }

  .features-grid,
  .steps-grid {
    grid-template-columns: 1fr;
  }

  .usecases-grid {
    grid-template-columns: 1fr 1fr;
  }

  .quick-actions {
    flex-wrap: wrap;
    justify-content: center;
  }

  .suggestion-box {
    flex-direction: column;
  }

  .footer-links {
    flex-direction: column;
    gap: 40px;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 28px;
  }

  .hero-subtitle {
    font-size: 15px;
  }

  .section-title {
    font-size: 24px;
  }

  .usecases-grid {
    grid-template-columns: 1fr;
  }

  .feature-card,
  .usecase-card {
    padding: 24px;
  }
}

/* Toast Notifications */
.toast-notification {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  padding: 12px 24px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transition: all 0.3s ease;
  z-index: 9999;
}

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

/* ===== PAGE HERO (About, Contact, Privacy) ===== */
.page-hero {
  padding: 120px 24px 50px;
  text-align: center;
  background: radial-gradient(ellipse at center top, rgba(239, 68, 68, 0.08) 0%, transparent 60%);
}

/* ===== CONTENT SECTION (About Page) ===== */
.content-section {
  padding: 40px 24px 80px;
}

.content-container {
  max-width: 800px;
  margin: 0 auto;
}

.content-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-bottom: 24px;
  transition: var(--transition);
}

.content-card:hover {
  border-color: var(--border-hover);
}

.content-icon {
  font-size: 32px;
  margin-bottom: 16px;
}

.content-card h2 {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.content-card p {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: 16px;
}

.content-card p:last-child {
  margin-bottom: 0;
}

.content-card a {
  color: var(--accent);
  text-decoration: none;
}

.content-card a:hover {
  text-decoration: underline;
}

/* Example Block */
.example-block {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-top: 16px;
}

.example-row {
  display: flex;
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}

.example-row:last-child {
  border-bottom: none;
}

.example-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  min-width: 80px;
}

.example-text {
  font-size: 16px;
  color: var(--text-primary);
}

/* Features List */
.features-list {
  margin-top: 16px;
}

.feature-item {
  display: flex;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}

.feature-item:last-child {
  border-bottom: none;
}

.feature-check {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(34, 197, 94, 0.1);
  color: #22c55e;
  border-radius: 50%;
  font-size: 14px;
  font-weight: 700;
  flex-shrink: 0;
}

.feature-item strong {
  display: block;
  margin-bottom: 4px;
  font-size: 15px;
}

.feature-item p {
  font-size: 14px;
  margin: 0;
}

/* Use Cases Grid */
.usecases-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 16px;
}

.usecase-item {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.usecase-item h3 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 8px;
}

.usecase-item p {
  font-size: 13px;
  margin: 0;
}

/* Tech Stack */
.tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0;
}

.tech-badge {
  padding: 6px 14px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
}

/* Privacy List */
.privacy-list {
  list-style: none;
  padding: 0;
  margin: 16px 0;
}

.privacy-list li {
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 14px;
}

.privacy-list li:last-child {
  border-bottom: none;
}

.privacy-list li::before {
  content: '✓';
  color: #22c55e;
  margin-right: 12px;
  font-weight: 700;
}

/* CTA Button */
.cta-button {
  display: inline-block;
  padding: 14px 32px;
  background: var(--accent);
  color: #ffffff !important;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none !important;
  margin-top: 20px;
  transition: var(--transition);
  letter-spacing: 0.3px;
}

.cta-button:hover {
  background: var(--accent-hover);
  text-decoration: none !important;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(239, 68, 68, 0.3);
}

/* ===== CONTACT PAGE ===== */
.contact-grid {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 32px;
  align-items: start;
}

.contact-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.contact-card h2 {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 8px;
}

.contact-subtitle {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 28px;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 14px;
  outline: none;
  transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent);
}

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

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

.form-group select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2371717a' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
}

.submit-btn {
  width: 100%;
  padding: 14px 24px;
  background: var(--accent);
  border: none;
  border-radius: var(--radius);
  color: white;
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.submit-btn:hover:not(:disabled) {
  background: var(--accent-hover);
}

.submit-btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

/* Form Success */
.form-success {
  text-align: center;
  padding: 40px 20px;
}

.success-icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(34, 197, 94, 0.1);
  color: #22c55e;
  border-radius: 50%;
  font-size: 28px;
  font-weight: 700;
  margin: 0 auto 20px;
}

.form-success h3 {
  font-size: 20px;
  margin-bottom: 8px;
}

.form-success p {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 24px;
}

/* Contact Info */
.contact-info {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.info-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.info-card h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.info-card p {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.6;
  margin: 0;
}

.info-note {
  display: block;
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 8px;
}

/* FAQ Card */
.faq-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.faq-card h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 20px;
}

.faq-item {
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-item h4 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
}

.faq-item p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
}

/* ===== AD CONTAINERS (LingoJam Style) ===== */
.ad-container {
  max-width: 1200px;
  margin: 24px auto;
  padding: 0 24px;
  text-align: center;
}

.ad-placeholder {
  background: var(--bg-secondary);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 24px;
  color: var(--text-muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.ad-top {
  margin-top: 80px;
}

.ad-middle {
  margin: 30px auto;
}

.ad-bottom {
  margin-bottom: 30px;
}

/* ===== RESPONSIVE ADDITIONS ===== */
@media (max-width: 768px) {
  .usecases-grid {
    grid-template-columns: 1fr;
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .contact-info {
    order: -1;
  }
}

@media (max-width: 480px) {
  .content-card {
    padding: 24px;
  }
  
  .contact-card {
    padding: 24px;
  }
}

/* ===== 404 ERROR PAGE ===== */
.error-page {
  min-height: calc(100vh - 200px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
  text-align: center;
}

.error-container {
  max-width: 500px;
}

.error-code {
  font-size: clamp(80px, 15vw, 120px);
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent) 0%, #f97316 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 16px;
}

.error-title {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 12px;
}

.error-message {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 32px;
  line-height: 1.6;
}

.error-btn {
  display: inline-block;
  padding: 14px 32px;
  background: var(--accent);
  color: #ffffff !important;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none !important;
  transition: var(--transition);
}

.error-btn:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(239, 68, 68, 0.3);
}

@media (max-width: 480px) {
  .error-page {
    padding: 60px 16px;
  }
  
  .error-title {
    font-size: 24px;
  }
  
  .error-message {
    font-size: 14px;
  }
}