/* ==========================================================================
   Fence Calculator 3D - Landing Page Stylesheet
   ========================================================================== */

:root {
  --bg-dark: #0a0e17;
  --bg-card: #121826;
  --bg-card-hover: #1a2234;
  --bg-input: #1a2336;
  --border-color: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(59, 130, 246, 0.3);
  
  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  
  --primary-blue: #3b82f6;
  --primary-blue-hover: #2563eb;
  --accent-cyan: #06b6d4;
  --accent-green: #10b981;
  --accent-orange: #f59e0b;
  --accent-purple: #8b5cf6;
  --accent-red: #ef4444;
  
  --font-heading: 'Plus Jakarta Sans', sans-serif;
  --font-body: 'Inter', sans-serif;
  
  --shadow-lg: 0 20px 40px -15px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 30px rgba(59, 130, 246, 0.25);
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
}

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

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

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

/* Layout Utilities */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Typography & Gradient Text */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--text-primary);
  font-weight: 700;
}

.gradient-text {
  background: linear-gradient(135deg, var(--primary-blue), var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 12px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.25s ease;
  text-decoration: none;
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-blue), #2563eb);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(59, 130, 246, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(59, 130, 246, 0.6);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

.btn-full {
  width: 100%;
}

/* App Store Badge */
.app-store-badge {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: #000000;
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 8px 18px;
  border-radius: 12px;
  text-decoration: none;
  color: #ffffff;
  transition: all 0.25s ease;
}

.app-store-badge:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.6);
  border-color: var(--primary-blue);
}

.badge-icon i {
  font-size: 1.8rem;
}

.badge-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.badge-subtitle {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: #9ca3af;
}

.badge-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.15rem;
}

/* Navigation Bar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(10, 14, 23, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  padding: 16px 0;
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.logo-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--primary-blue), var(--accent-cyan));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-size: 1.2rem;
  box-shadow: 0 0 15px rgba(59, 130, 246, 0.4);
}

.logo-text {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.35rem;
  color: #ffffff;
}

.logo-highlight {
  color: var(--primary-blue);
}

.nav-links {
  display: flex;
  gap: 24px;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s ease;
}

.nav-links a:hover {
  color: #ffffff;
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  color: #ffffff;
  font-size: 1.5rem;
  cursor: pointer;
}

/* Hero Section */
.hero-section {
  position: relative;
  padding: 150px 0 90px;
  overflow: hidden;
}

.hero-bg-glow {
  position: absolute;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 500px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.18) 0%, rgba(10, 14, 23, 0) 70%);
  pointer-events: none;
}

.hero-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.3);
  border-radius: 20px;
  color: var(--primary-blue);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.hero-title {
  font-size: 3rem;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

.hero-description {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  align-items: center;
  margin-bottom: 40px;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 16px 24px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  width: fit-content;
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.2rem;
  color: #ffffff;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.stat-divider {
  width: 1px;
  height: 28px;
  background: var(--border-color);
}

/* Hero Visual & 3D Canvas Box */
.canvas-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  position: relative;
}

.canvas-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid var(--border-color);
}

.canvas-dots {
  display: flex;
  gap: 6px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.dot.red { background: #ef4444; }
.dot.yellow { background: #f59e0b; }
.dot.green { background: #10b981; }

.canvas-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.canvas-badge {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 3px 8px;
  background: rgba(59, 130, 246, 0.15);
  color: var(--primary-blue);
  border-radius: 6px;
}

.threejs-container {
  width: 100%;
  height: 380px;
  background: #0f1522;
}

.canvas-overlay-hint {
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  padding: 6px 14px;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  border-radius: 20px;
  font-size: 0.75rem;
  color: var(--text-secondary);
  pointer-events: none;
}

/* Features Grid Section */
.features-section {
  padding: 90px 0;
  background: rgba(255, 255, 255, 0.01);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.section-header {
  text-align: center;
  max-width: 650px;
  margin: 0 auto 60px;
}

.section-subtitle {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--primary-blue);
  display: block;
  margin-bottom: 8px;
}

.section-title {
  font-size: 2.2rem;
  margin-bottom: 12px;
}

.section-desc {
  color: var(--text-secondary);
  font-size: 1rem;
}

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

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: all 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-glow);
  background: var(--bg-card-hover);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 20px;
}
.feature-icon.bg-blue { background: rgba(59, 130, 246, 0.15); color: var(--primary-blue); }
.feature-icon.bg-purple { background: rgba(139, 92, 246, 0.15); color: var(--accent-purple); }
.feature-icon.bg-orange { background: rgba(245, 158, 11, 0.15); color: var(--accent-orange); }
.feature-icon.bg-green { background: rgba(16, 185, 129, 0.15); color: var(--accent-green); }
.feature-icon.bg-teal { background: rgba(6, 182, 212, 0.15); color: var(--accent-cyan); }
.feature-icon.bg-red { background: rgba(239, 68, 68, 0.15); color: var(--accent-red); }

.feature-card h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.5;
}

/* Demo Section */
.demo-section {
  padding: 90px 0;
}

.demo-calculator-box {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-lg);
}

.demo-box-title {
  font-size: 1.1rem;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-color);
  color: var(--primary-blue);
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.input-group label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 6px;
  font-weight: 500;
}

.input-with-stepper {
  display: flex;
  align-items: center;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.input-with-stepper input {
  width: 100%;
  background: none;
  border: none;
  padding: 10px 14px;
  color: #ffffff;
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  outline: none;
}

.unit-tag {
  padding: 0 14px;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 700;
}

.demo-select {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  color: #ffffff;
  font-family: var(--font-body);
  font-size: 0.95rem;
  outline: none;
  cursor: pointer;
}

.results-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
}

.result-tile {
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  padding: 14px;
  border-radius: var(--radius-sm);
}

.result-icon {
  width: 36px;
  height: 36px;
  background: rgba(59, 130, 246, 0.15);
  color: var(--primary-blue);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.result-data {
  display: flex;
  flex-direction: column;
}

.result-val {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.15rem;
  color: #ffffff;
}

.result-lbl {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.demo-cost-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: var(--radius-md);
  color: var(--accent-green);
  font-weight: 600;
}

.demo-cost-val {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 800;
}

/* Support & Contact Section */
.support-section {
  padding: 90px 0;
  background: rgba(255, 255, 255, 0.01);
  border-top: 1px solid var(--border-color);
}

.support-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: start;
}

.support-block-title {
  font-size: 1.25rem;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--primary-blue);
}

/* FAQ Accordion */
.faq-container {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.2s ease;
}

.faq-item.active {
  border-color: var(--primary-blue);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  background: none;
  border: none;
  color: #ffffff;
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
}

.faq-question i {
  transition: transform 0.3s ease;
  color: var(--text-muted);
}

.faq-item.active .faq-question i {
  transform: rotate(180deg);
  color: var(--primary-blue);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 20px;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.faq-item.active .faq-answer {
  max-height: 200px;
  padding: 0 20px 18px 20px;
}

/* Contact Form */
.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
}

.contact-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.support-form .form-group {
  margin-bottom: 16px;
}

.support-form label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 6px;
  font-weight: 500;
}

.support-form input,
.support-form select,
.support-form textarea {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  color: #ffffff;
  font-family: var(--font-body);
  font-size: 0.9rem;
  outline: none;
}

.support-form input:focus,
.support-form select:focus,
.support-form textarea:focus {
  border-color: var(--primary-blue);
}

.form-response {
  margin-top: 12px;
  font-size: 0.85rem;
  font-weight: 600;
  text-align: center;
}

/* Privacy Policy Section */
.privacy-section {
  padding: 90px 0;
  background: rgba(255, 255, 255, 0.015);
  border-top: 1px solid var(--border-color);
}

.privacy-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-lg);
}

.privacy-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

.privacy-icon {
  width: 54px;
  height: 54px;
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-green);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
}

.privacy-title {
  font-size: 2rem;
  margin-bottom: 4px;
}

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

.privacy-lead {
  font-size: 1.05rem;
  color: var(--text-primary);
  margin-bottom: 30px;
  line-height: 1.7;
}

.privacy-block {
  margin-bottom: 24px;
}

.privacy-block h3 {
  font-size: 1.1rem;
  color: var(--primary-blue);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 10px;
}

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

.privacy-block code {
  background: rgba(255, 255, 255, 0.08);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: monospace;
  color: var(--accent-cyan);
}

.privacy-block a {
  color: var(--primary-blue);
  text-decoration: underline;
}

/* Footer */
.footer {
  background: #070a10;
  border-top: 1px solid var(--border-color);
  padding: 60px 0 24px;
}

.footer-container {
  display: flex;
  justify-content: space-between;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.85rem;
  max-width: 320px;
  margin-top: 14px;
}

.footer-links {
  display: flex;
  gap: 60px;
}

.footer-col h4 {
  font-size: 0.95rem;
  margin-bottom: 16px;
  color: #ffffff;
}

.footer-col a {
  display: block;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.85rem;
  margin-bottom: 10px;
  transition: color 0.2s ease;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 20px;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Responsive Media Queries */
@media (max-width: 992px) {
  .hero-container {
    grid-template-columns: 1fr;
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .demo-calculator-box {
    grid-template-columns: 1fr;
  }
  .support-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .mobile-menu-toggle {
    display: block;
  }
  .hero-title {
    font-size: 2.2rem;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
}