/* =========================================================
   InjXpert Landing Page Stylesheet
   Design tokens match the Flutter app theme (AppTheme)
   ========================================================= */

/* ---------------------------------------------------------
   1. CSS Custom Properties (Design Tokens)
   --------------------------------------------------------- */
:root {
  /* Colors */
  --color-primary:        #1565C0;
  --color-primary-dark:   #0D47A1;
  --color-primary-light:  #1E88E5;
  --color-text-primary:   #212121;
  --color-text-secondary: #757575;
  --color-surface:        #FFFFFF;
  --color-background:     #F5F5F5;
  --color-success:        #4CAF50;
  --color-error:          #D32F2F;
  --color-border:         #E0E0E0;

  /* Border Radius */
  --radius-sm:  4px;
  --radius-md:  8px;
  --radius-lg:  12px;
  --radius-xl:  16px;

  /* Spacing */
  --space-xs:  4px;
  --space-sm:  8px;
  --space-md:  16px;
  --space-lg:  24px;
  --space-xl:  32px;
  --space-2xl: 48px;
  --space-3xl: 64px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.12);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.14);

  /* Typography */
  --font-family: 'Inter', sans-serif;

  /* Transitions */
  --transition: 0.2s ease;
}

/* ---------------------------------------------------------
   2. Reset & Base
   --------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-family);
  color: var(--color-text-primary);
  background-color: var(--color-background);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

button {
  cursor: pointer;
  font-family: var(--font-family);
  border: none;
  background: none;
}

/* ---------------------------------------------------------
   3. Container
   --------------------------------------------------------- */
.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-md);
  padding-right: var(--space-md);
}

/* ---------------------------------------------------------
   4. Buttons
   --------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 12px var(--space-xl);
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 600;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  white-space: nowrap;
}

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

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

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

.btn-outline:hover {
  background-color: rgba(255, 255, 255, 0.15);
  transform: translateY(-2px);
}

.btn-inquire {
  background-color: var(--color-primary);
  color: var(--color-surface);
  padding: 10px var(--space-md);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  width: 100%;
  margin-top: auto;
}

.btn-inquire:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

/* ---------------------------------------------------------
   5. Header / Navigation (Sticky)
   --------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-surface);
  box-shadow: var(--shadow-sm);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.5px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text-primary);
  transition: color var(--transition);
  position: relative;
  padding-bottom: 2px;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--transition);
}

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

.nav-links a:hover::after {
  width: 100%;
}

.nav-cta {
  background: var(--color-primary);
  color: #fff !important;
  padding: 8px 20px;
  border-radius: var(--radius-md);
  font-weight: 600;
  transition: background 0.2s, transform 0.2s;
}
.nav-cta:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
}
.nav-cta::after {
  display: none !important;
}

.feature-card-link {
  text-decoration: none;
  color: inherit;
  display: block;
  cursor: pointer;
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-sm);
  background: none;
  border: none;
  cursor: pointer;
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text-primary);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

/* ---------------------------------------------------------
   6. Hero Section
   --------------------------------------------------------- */
.hero {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 50%, var(--color-primary-light) 100%);
  color: var(--color-surface);
  padding: var(--space-3xl) 0;
  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
  overflow: hidden;
  position: relative;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 70% 50%, rgba(255,255,255,0.08) 0%, transparent 60%);
  pointer-events: none;
}

.hero-content {
  max-width: 720px;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-block;
  background-color: rgba(255,255,255,0.15);
  color: var(--color-surface);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: var(--space-xs) var(--space-md);
  border-radius: 100px;
  margin-bottom: var(--space-md);
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -1px;
  margin-bottom: var(--space-md);
}

.hero p {
  font-size: 1.15rem;
  opacity: 0.9;
  margin-bottom: var(--space-xl);
  max-width: 600px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}

/* ---------------------------------------------------------
   7. Section Common Styles
   --------------------------------------------------------- */
.section {
  padding: var(--space-3xl) 0;
}

.section-alt {
  background-color: var(--color-surface);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.section-header h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--space-sm);
  letter-spacing: -0.5px;
}

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

/* ---------------------------------------------------------
   8. Features Grid (4 Cards)
   --------------------------------------------------------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}

.feature-card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.feature-icon {
  font-size: 2.2rem;
  margin-bottom: var(--space-sm);
  display: block;
}

.feature-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text-primary);
}

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

/* ---------------------------------------------------------
   9. Marketplace Product Cards (4 Cards)
   --------------------------------------------------------- */
.marketplace-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}

.product-card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.product-icon {
  font-size: 2.4rem;
  margin-bottom: var(--space-sm);
  display: block;
}

.product-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: 1.4;
}

.product-price {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-top: var(--space-xs);
}

.product-note {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  font-style: italic;
}

/* ---------------------------------------------------------
   10. Contact Form
   --------------------------------------------------------- */
.contact-section {
  background-color: var(--color-surface);
}

.contact-inner {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--space-3xl);
  align-items: start;
}

.contact-info h2 {
  font-size: 1.9rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--space-md);
  letter-spacing: -0.5px;
}

.contact-info p {
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-lg);
}

.contact-detail {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  margin-bottom: var(--space-sm);
}

.contact-detail span:first-child {
  font-size: 1.2rem;
}

.inquiry-form {
  background-color: var(--color-background);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  box-shadow: var(--shadow-sm);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  margin-bottom: var(--space-md);
}

.form-group label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: var(--font-family);
  font-size: 0.95rem;
  color: var(--color-text-primary);
  background-color: var(--color-surface);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(21, 101, 192, 0.15);
}

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

.form-group select {
  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='%23757575' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}

.btn-submit {
  width: 100%;
  padding: 14px;
  background-color: var(--color-primary);
  color: var(--color-surface);
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-family);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}

.btn-submit:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-submit:disabled {
  background-color: var(--color-text-secondary);
  transform: none;
  box-shadow: none;
  cursor: not-allowed;
}

/* Form feedback messages */
.form-success,
.form-error {
  display: none;
  padding: var(--space-md);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 500;
  margin-top: var(--space-md);
}

.form-success {
  background-color: rgba(76, 175, 80, 0.1);
  color: #2E7D32;
  border: 1px solid rgba(76, 175, 80, 0.3);
}

.form-error {
  background-color: rgba(211, 47, 47, 0.1);
  color: var(--color-error);
  border: 1px solid rgba(211, 47, 47, 0.3);
}

/* Honeypot — must be completely hidden */
.honeypot {
  display: none !important;
}

/* ---------------------------------------------------------
   11. Footer
   --------------------------------------------------------- */
.site-footer {
  background-color: var(--color-primary-dark);
  color: rgba(255,255,255,0.85);
  padding: var(--space-2xl) 0 var(--space-lg);
}

.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-xl);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid rgba(255,255,255,0.15);
  margin-bottom: var(--space-lg);
}

.footer-brand .nav-logo {
  color: var(--color-surface);
  display: inline-block;
  margin-bottom: var(--space-sm);
}

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.6;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-surface);
  margin-bottom: var(--space-md);
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-col ul li a {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.75);
  transition: color var(--transition);
}

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

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-sm);
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
}

/* ---------------------------------------------------------
   12. Responsive — Tablet (max-width: 1024px)
   --------------------------------------------------------- */
@media (max-width: 1024px) {
  .features-grid,
  .marketplace-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .contact-inner {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

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

  .footer-brand {
    grid-column: span 2;
  }
}

/* ---------------------------------------------------------
   13. Responsive — Mobile (max-width: 768px)
   --------------------------------------------------------- */
@media (max-width: 768px) {
  .mobile-menu-btn {
    display: flex;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background-color: var(--color-surface);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    box-shadow: var(--shadow-md);
    padding: var(--space-sm) 0;
    z-index: 99;
  }

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

  .nav-links a {
    width: 100%;
    padding: 14px var(--space-md);
    border-bottom: 1px solid var(--color-border);
    font-size: 1rem;
  }

  .nav-links a::after {
    display: none;
  }

  .site-header {
    position: sticky;
  }

  .hero {
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    padding: var(--space-2xl) 0;
  }

  .hero-actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

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

  .form-row {
    grid-template-columns: 1fr;
  }

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

  .footer-brand {
    grid-column: auto;
  }

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

@media (max-width: 480px) {
  .section {
    padding: var(--space-2xl) 0;
  }

  .hero h1 {
    font-size: 1.8rem;
  }
}