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

:root {
  --bg: #0f172a;
  --bg-card: #1e293b;
  --bg-hover: #263548;
  --text: #ffffff;
  --text-secondary: #94a3b8;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --accent-glow: rgba(59, 130, 246, 0.3);
  --border: #334155;
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.2s ease;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

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

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 14px 0;
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text);
}

.logo svg {
  width: 32px;
  height: 32px;
}

.logo span {
  background: linear-gradient(135deg, var(--accent), #8b5cf6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
}

.nav-links a:hover {
  color: var(--text);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 4px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:hover {
  background: var(--accent-hover);
  box-shadow: 0 6px 28px var(--accent-glow);
  transform: translateY(-1px);
  color: #fff;
}

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

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

.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 2px solid var(--accent);
}

.btn-outline:hover {
  background: var(--accent);
  color: #fff;
}

/* Hero Section */
.hero {
  padding: 80px 0 60px;
  text-align: center;
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(59, 130, 246, 0.15);
  color: var(--accent);
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 24px;
  border: 1px solid rgba(59, 130, 246, 0.2);
}

.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.hero h1 span {
  background: linear-gradient(135deg, var(--accent), #8b5cf6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* Tool Box */
.tool-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 40px;
  max-width: 680px;
  margin: 0 auto;
}

.tool-box h2 {
  font-size: 1.3rem;
  margin-bottom: 8px;
}

.tool-box p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 20px;
}

.platform-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
}

.platform-tab {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.platform-tab:hover {
  background: var(--bg-hover);
  color: var(--text);
}

.platform-tab.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.platform-tab span {
  font-size: 1.2rem;
}

.input-group {
  display: flex;
  gap: 10px;
  margin-bottom: 12px;
}

.input-group input {
  flex: 1;
  padding: 14px 18px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 0.95rem;
  outline: none;
  transition: border var(--transition);
}

.input-group input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.input-group input::placeholder {
  color: var(--text-secondary);
}

/* Loading */
.loading {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 20px;
  color: var(--text-secondary);
}

.loading.active {
  display: flex;
}

.spinner {
  width: 22px;
  height: 22px;
  border: 3px solid var(--border);
  border-top: 3px solid var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* Result */
.result {
  display: none;
  margin-top: 20px;
  padding: 20px;
  background: rgba(59, 130, 246, 0.08);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: var(--radius);
}

.result.active {
  display: block;
}

#error {
  display: none;
  margin-top: 12px;
  padding: 16px 20px;
  border-radius: var(--radius);
}

#error.active {
  display: block;
}

.result-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.result-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(59, 130, 246, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.result-title {
  font-weight: 600;
  font-size: 1rem;
}

.result-meta {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.result-actions {
  display: flex;
  gap: 10px;
  margin-top: 14px;
}

.result-actions .btn {
  padding: 10px 20px;
  font-size: 0.9rem;
}

/* Sections */
.section {
  padding: 70px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-header h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.section-header p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 560px;
  margin: 0 auto;
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: all var(--transition);
}

.feature-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(59, 130, 246, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Steps */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
  counter-reset: step;
}

.step-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  position: relative;
  text-align: center;
}

.step-number {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
  margin: 0 auto 16px;
}

.step-card h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.step-card p {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

/* FAQ */
.faq-list {
  max-width: 720px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px;
  background: var(--bg-card);
  border: none;
  color: var(--text);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  text-align: left;
  transition: background var(--transition);
}

.faq-question:hover {
  background: var(--bg-hover);
}

.faq-question .icon {
  font-size: 1.2rem;
  transition: transform var(--transition);
  color: var(--text-secondary);
}

.faq-item.open .faq-question .icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 22px;
  background: var(--bg);
}

.faq-item.open .faq-answer {
  max-height: 300px;
  padding: 18px 22px;
}

.faq-answer p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.7;
}

/* Content Section (for SEO copy) */
.content-section {
  max-width: 780px;
  margin: 0 auto;
}

.content-section h2 {
  font-size: 1.6rem;
  margin-bottom: 16px;
  margin-top: 40px;
}

.content-section h3 {
  font-size: 1.2rem;
  margin-bottom: 12px;
  margin-top: 28px;
}

.content-section p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.75;
  font-size: 0.95rem;
}

.content-section ul {
  list-style: none;
  margin: 16px 0;
}

.content-section ul li {
  padding: 8px 0 8px 24px;
  position: relative;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.content-section ul li::before {
  content: "•";
  color: var(--accent);
  position: absolute;
  left: 6px;
  font-weight: 700;
}

/* Warning Box */
.warning-box {
  background: rgba(234, 179, 8, 0.06);
  border: 1px solid rgba(234, 179, 8, 0.2);
  border-radius: var(--radius);
  padding: 24px;
  margin: 28px 0;
}

.warning-box h3 {
  color: #fbbf24;
  font-size: 1rem;
  margin-bottom: 8px;
  margin-top: 0;
}

.warning-box p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 0;
}

/* Blog Cards */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.blog-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: all var(--transition);
}

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

.blog-card .tag {
  display: inline-block;
  padding: 4px 10px;
  background: rgba(59, 130, 246, 0.12);
  color: var(--accent);
  border-radius: 4px;
  font-size: 0.78rem;
  font-weight: 500;
  margin-bottom: 12px;
}

.blog-card h3 {
  font-size: 1.1rem;
  margin-bottom: 10px;
  line-height: 1.4;
}

.blog-card h3 a {
  color: var(--text);
}

.blog-card h3 a:hover {
  color: var(--accent);
}

.blog-card p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 14px;
}

.blog-card .read-more {
  font-size: 0.88rem;
  font-weight: 500;
}

/* Blog Article */
.article-header {
  padding: 50px 0 30px;
  text-align: center;
}

.article-header h1 {
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 12px;
}

.article-header .meta {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.article-body {
  max-width: 740px;
  margin: 0 auto;
  padding-bottom: 60px;
}

.article-body p {
  color: var(--text-secondary);
  margin-bottom: 18px;
  line-height: 1.8;
  font-size: 0.95rem;
}

.article-body h2 {
  font-size: 1.5rem;
  margin: 36px 0 14px;
}

.article-body h3 {
  font-size: 1.15rem;
  margin: 28px 0 10px;
}

.article-body ul {
  list-style: none;
  margin: 16px 0;
}

.article-body ul li {
  padding: 6px 0 6px 24px;
  position: relative;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.article-body ul li::before {
  content: "•";
  color: var(--accent);
  position: absolute;
  left: 6px;
  font-weight: 700;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 48px 0 32px;
  margin-top: 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 32px;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.88rem;
  margin-top: 12px;
  max-width: 280px;
}

.footer-col h4 {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 14px;
  color: var(--text);
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 8px;
}

.footer-col ul li a {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.footer-col ul li a:hover {
  color: var(--accent);
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p {
  color: var(--text-secondary);
  font-size: 0.82rem;
}

/* Page Banner */
.page-banner {
  padding: 60px 0 40px;
  text-align: center;
}

.page-banner h1 {
  font-size: 2.2rem;
  font-weight: 800;
}

.page-banner p {
  color: var(--text-secondary);
  margin-top: 10px;
  font-size: 1rem;
}

/* Contact Form */
.contact-form {
  max-width: 560px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
  font-size: 0.95rem;
  outline: none;
  transition: border var(--transition);
  font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-group textarea {
  min-height: 130px;
  resize: vertical;
}

/* Trust Pages */
.trust-content {
  max-width: 760px;
  margin: 0 auto;
  padding-bottom: 60px;
}

.trust-content h2 {
  font-size: 1.4rem;
  margin: 36px 0 14px;
}

.trust-content h3 {
  font-size: 1.1rem;
  margin: 24px 0 10px;
}

.trust-content p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.75;
  font-size: 0.95rem;
}

.trust-content ul {
  list-style: none;
  margin: 16px 0;
  color: var(--text-secondary);
}

.trust-content ul li {
  padding: 6px 0 6px 24px;
  position: relative;
  font-size: 0.95rem;
}

.trust-content ul li::before {
  content: "•";
  color: var(--accent);
  position: absolute;
  left: 6px;
  font-weight: 700;
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .tool-box {
    padding: 24px;
  }

  .input-group {
    flex-direction: column;
  }

  .section-header h2 {
    font-size: 1.6rem;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(15, 23, 42, 0.98);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 20px;
    gap: 16px;
  }

  .nav-links.active {
    display: flex;
  }

  .nav-toggle {
    display: block;
  }

  .article-header h1 {
    font-size: 1.6rem;
  }

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

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

  .page-banner h1 {
    font-size: 1.7rem;
  }

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

@media (max-width: 480px) {
  .hero {
    padding: 50px 0 40px;
  }

  .hero h1 {
    font-size: 1.7rem;
  }

  .section {
    padding: 50px 0;
  }

  .tool-box {
    padding: 18px;
  }

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

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}