:root {
  --primary: #2563EB;
  --primary-hover: #1D4ED8;
  --primary-light: #EFF6FF;
  --whatsapp: #25D366;
  --whatsapp-hover: #1EBE5D;
  --whatsapp-light: #E8F8F0;
  --bg: #F8FAFC;
  --card-bg: #FFFFFF;
  --text-main: #0F172A;
  --text-muted: #64748B;
  --border: #E2E8F0;
  --success: #10B981;
  --radius: 12px;
  --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.05), 0 2px 4px -2px rgb(0 0 0 / 0.05);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.08), 0 4px 6px -4px rgb(0 0 0 / 0.05);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

body {
  background-color: var(--bg);
  color: var(--text-main);
  line-height: 1.6;
}

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

/* Navbar */
.navbar {
  background: #FFFFFF;
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03);
}

.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
}

.logo {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
  letter-spacing: -0.5px;
}

.nav-menu-wrap {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav-links {
  display: flex;
  gap: 8px;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.92rem;
  font-weight: 600;
  padding: 8px 14px;
  border-radius: 8px;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-links a:hover, .nav-links a.active {
  color: var(--primary);
  background: var(--primary-light);
}

/* Hamburger Button (Hidden on Desktop) */
.hamburger-btn {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 20px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 110;
}

.hamburger-btn .bar {
  width: 100%;
  height: 3px;
  background-color: var(--text-main);
  border-radius: 4px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Morph Hamburger to Close (X) */
.hamburger-btn.open .bar:nth-child(1) {
  transform: translateY(8.5px) rotate(45deg);
}

.hamburger-btn.open .bar:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.hamburger-btn.open .bar:nth-child(3) {
  transform: translateY(-8.5px) rotate(-45deg);
}

/* Tab Switcher in Hero */
.tabs-nav {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin: 20px 0 30px;
}

.tab-btn {
  padding: 10px 22px;
  border-radius: 30px;
  font-size: 0.95rem;
  font-weight: 600;
  border: 1px solid var(--border);
  background: #FFFFFF;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.tab-btn.active {
  background: var(--primary);
  color: #FFFFFF;
  border-color: var(--primary);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

/* AdSense Slot */
.adsense-slot {
  background: #F1F5F9;
  border: 1px dashed #CBD5E1;
  border-radius: 8px;
  padding: 16px;
  margin: 24px 0;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  min-height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 30px 0 10px;
}

.hero h1 {
  font-size: 2.6rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.hero h1 span {
  color: var(--primary);
}

.hero h1 span.wa-span {
  color: var(--whatsapp);
}

.hero p {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 700px;
  margin: 0 auto;
}

/* Tool Card */
.tool-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px;
  box-shadow: var(--shadow-lg);
  margin-bottom: 30px;
}

.search-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.input-row {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.input-group {
  flex: 1;
  min-width: 240px;
}

.input-group label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text-main);
}

.input-control {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 1rem;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.input-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.btn-primary {
  background: var(--primary);
  color: #FFFFFF;
  border: none;
  padding: 14px 28px;
  font-size: 1.05rem;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

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

.btn-whatsapp {
  background: var(--whatsapp);
  color: #FFFFFF;
  border: none;
  padding: 14px 28px;
  font-size: 1.05rem;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.btn-whatsapp:hover {
  background: var(--whatsapp-hover);
}

/* WhatsApp Result Output Box */
.wa-output-box {
  background: var(--whatsapp-light);
  border: 1px solid #A7F3D0;
  border-radius: 10px;
  padding: 24px;
  margin-top: 24px;
  display: none;
}

.wa-result-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: center;
}

.wa-link-text {
  background: #FFFFFF;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 16px;
  font-size: 0.95rem;
  color: var(--text-main);
  word-break: break-all;
  margin-bottom: 16px;
}

.wa-btn-group {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

#qrCanvas {
  border-radius: 8px;
  background: #FFFFFF;
  padding: 8px;
  box-shadow: var(--shadow);
}

/* Progress bar */
.progress-container {
  display: none;
  margin-top: 20px;
}

.progress-track {
  width: 100%;
  height: 8px;
  background: #E2E8F0;
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 8px;
}

.progress-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #2563EB, #60A5FA);
  border-radius: 4px;
  transition: width 0.3s ease;
}

.progress-status {
  font-size: 0.9rem;
  color: var(--text-muted);
  text-align: center;
}

/* Metrics */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.metric-box {
  background: #F8FAFC;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  text-align: center;
}

.metric-val {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--primary);
}

.metric-lbl {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Export Bar */
.export-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.export-btns {
  display: flex;
  gap: 10px;
}

.btn-export {
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid var(--border);
  background: #FFFFFF;
  color: var(--text-main);
  transition: all 0.2s;
  display: flex;
  align-items: center;
  gap: 6px;
}

.btn-export:hover {
  background: #F1F5F9;
  border-color: #CBD5E1;
}

.btn-csv { border-left: 3px solid #10B981; }
.btn-excel { border-left: 3px solid #059669; }
.btn-json { border-left: 3px solid #F59E0B; }

/* Table */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
  max-height: 450px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  text-align: left;
}

th {
  background: #F8FAFC;
  padding: 12px 16px;
  font-weight: 600;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  color: var(--text-main);
}

tr:hover td {
  background: #F8FAFC;
}

.badge {
  display: inline-block;
  padding: 2px 8px;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 12px;
  background: #EFF6FF;
  color: var(--primary);
}

.btn-table-wa {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: #25D366;
  color: #FFFFFF;
  text-decoration: none;
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  transition: background 0.2s;
}

.btn-table-wa:hover {
  background: #1EBE5D;
}

/* SEO Content Section */
.seo-section {
  background: #FFFFFF;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
  margin: 30px 0;
  box-shadow: var(--shadow);
}

.seo-section h2 {
  font-size: 1.8rem;
  margin-bottom: 16px;
  color: var(--text-main);
}

.seo-section h3 {
  font-size: 1.3rem;
  margin: 24px 0 10px;
  color: var(--text-main);
}

.seo-section p, .seo-section li {
  color: #475569;
  font-size: 1rem;
  margin-bottom: 12px;
}

.seo-section ul, .seo-section ol {
  padding-left: 20px;
  margin-bottom: 16px;
}

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

.faq-q {
  font-weight: 600;
  font-size: 1.05rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
}

.faq-a {
  margin-top: 8px;
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Footer */
footer {
  background: #FFFFFF;
  border-top: 1px solid var(--border);
  padding: 30px 0;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 12px;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
}

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

/* ========================================================= */
/* COMPREHENSIVE TABLET & MOBILE RESPONSIVENESS (320px - 1024px) */
/* ========================================================= */

/* Tablets & Small Laptops (max-width: 1024px) */
@media (max-width: 1024px) {
  .container {
    padding: 0 16px;
  }
  
  .hero h1 {
    font-size: 2.2rem;
  }
  
  .tool-card {
    padding: 24px;
  }
  
  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
}

/* Tablets (max-width: 768px) */
@media (max-width: 768px) {
  .nav-content {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    width: 100%;
  }

  .hamburger-btn {
    display: flex;
  }

  .nav-menu-wrap {
    display: none;
    position: absolute;
    top: calc(100% + 12px);
    left: 0;
    right: 0;
    background: #FFFFFF;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
    box-shadow: var(--shadow-lg);
    flex-direction: column;
    gap: 12px;
    z-index: 200;
  }

  .nav-menu-wrap.open {
    display: flex;
    animation: menuSlideDown 0.2s ease-out forwards;
  }

  @keyframes menuSlideDown {
    from {
      opacity: 0;
      transform: translateY(-8px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  .nav-menu-wrap .nav-links {
    flex-direction: column;
    width: 100%;
    gap: 6px;
  }

  .nav-menu-wrap .nav-links a {
    display: flex;
    align-items: center;
    padding: 10px 14px;
    font-size: 0.95rem;
    border-radius: 8px;
    background: #F8FAFC;
    color: var(--text-main);
  }

  .nav-menu-wrap .nav-links a.active {
    background: var(--primary-light);
    color: var(--primary);
    font-weight: 700;
  }

  .nav-badge-wrap {
    width: 100%;
    text-align: center;
    padding-top: 4px;
  }

  .nav-badge-wrap .badge {
    display: inline-block;
    width: 100%;
    padding: 8px;
  }

  /* Horizontal Scrollable Tabs on Mobile */
  .tabs-nav {
    display: flex;
    overflow-x: auto;
    justify-content: flex-start;
    padding-bottom: 8px;
    gap: 8px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .tabs-nav::-webkit-scrollbar {
    display: none;
  }

  .tab-btn {
    white-space: nowrap;
    padding: 8px 16px;
    font-size: 0.88rem;
    flex-shrink: 0;
  }

  .hero {
    margin-bottom: 24px;
  }

  .hero h1 {
    font-size: 1.85rem;
  }

  .hero p {
    font-size: 0.98rem;
  }

  .tool-card {
    padding: 18px;
    border-radius: 10px;
  }

  .input-row {
    flex-direction: column;
    gap: 12px;
  }

  .input-group {
    min-width: 100%;
  }

  .input-control {
    font-size: 16px; /* Prevents iOS auto-zoom */
    padding: 12px 14px;
  }

  .btn-primary, .btn-whatsapp {
    width: 100%;
    padding: 14px 20px;
    font-size: 1rem;
    min-height: 48px; /* Touch-friendly tap target */
  }

  .results-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .export-btns {
    width: 100%;
    display: flex;
    gap: 8px;
  }

  .btn-export {
    flex: 1;
    text-align: center;
    padding: 8px 10px;
    font-size: 0.85rem;
  }

  .table-wrap {
    max-height: 450px;
    -webkit-overflow-scrolling: touch;
  }

  table th, table td {
    padding: 10px 12px;
    font-size: 0.85rem;
    white-space: nowrap;
  }

  .wa-result-grid {
    grid-template-columns: 1fr;
    justify-items: center;
    gap: 20px;
  }

  .wa-btn-group {
    flex-direction: column;
    width: 100%;
  }

  .wa-btn-group a, .wa-btn-group button {
    width: 100%;
    text-align: center;
    justify-content: center;
  }

  .seo-section {
    padding: 20px;
  }

  .seo-section h2 {
    font-size: 1.45rem;
  }

  .footer-links {
    flex-wrap: wrap;
    gap: 12px;
  }
}

/* Small Mobile Screens (max-width: 480px) */
@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.6rem;
  }

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

  .metric-card {
    padding: 12px;
  }

  .metric-card .val {
    font-size: 1.4rem;
  }

  .export-btns {
    flex-direction: column;
  }

  .btn-export {
    width: 100%;
  }
}