/* ========================================
   Linnda Amazon Ads — Landing Page Styles
   ======================================== */

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

:root {
  --color-primary: #0f1b2d;
  --color-primary-light: #1a2d47;
  --color-accent: #00c896;
  --color-accent-dark: #00a87d;
  --color-accent-glow: rgba(0, 200, 150, 0.15);
  --color-gold: #f5a623;
  --color-gold-light: rgba(245, 166, 35, 0.12);
  --color-text: #e8ecf1;
  --color-text-muted: #8d99ae;
  --color-surface: #162236;
  --color-surface-light: #1e3050;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-white: #ffffff;
  --color-bg: #0b1220;
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --max-width: 1140px;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.4);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: var(--font-main);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

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

/* --- Typography --- */
h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-white);
}

h1 { font-size: clamp(2rem, 5vw, 3.2rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.6rem); }

p {
  margin-bottom: 1rem;
  color: var(--color-text-muted);
}

.text-accent { color: var(--color-accent); }
.text-gold { color: var(--color-gold); }

/* --- Layout --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

section {
  padding: 5rem 0;
}

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 1rem;
  padding: 0.35rem 0.75rem;
  background: var(--color-accent-glow);
  border-radius: 20px;
}

.section-title {
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  max-width: 640px;
  margin-bottom: 3rem;
}

.text-center { text-align: center; }
.mx-auto { margin-left: auto; margin-right: auto; }

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1rem 0;
  transition: background var(--transition), box-shadow var(--transition);
}

.nav.scrolled {
  background: rgba(11, 18, 32, 0.95);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--color-border);
}

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

.nav-logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-white);
  letter-spacing: -0.02em;
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

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

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

.nav-lang {
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.3rem 0.7rem;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  color: var(--color-text-muted);
  transition: all var(--transition);
}

.nav-lang:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

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

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.9rem 2rem;
  font-family: var(--font-main);
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}

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

.btn-primary:hover {
  background: var(--color-accent-dark);
  color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 200, 150, 0.3);
}

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

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

.btn-lg {
  padding: 1.1rem 2.5rem;
  font-size: 1.1rem;
}

/* --- Hero --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 5rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0, 200, 150, 0.08), transparent 70%);
  pointer-events: none;
}

.hero-content {
  max-width: 720px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--color-gold-light);
  color: var(--color-gold);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.5rem 1rem;
  border-radius: 20px;
  margin-bottom: 1.5rem;
}

.hero h1 {
  margin-bottom: 1.5rem;
}

.hero h1 .highlight {
  color: var(--color-accent);
  position: relative;
}

.hero-description {
  font-size: 1.2rem;
  color: var(--color-text-muted);
  max-width: 560px;
  margin-bottom: 2rem;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 3rem;
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}

.hero-stat {
  text-align: left;
}

.hero-stat-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-accent);
  font-family: var(--font-mono);
}

.hero-stat-label {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* --- Problem Section --- */
.problems {
  background: var(--color-surface);
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}

.problem-card {
  background: var(--color-primary-light);
  padding: 2rem;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  transition: transform var(--transition), border-color var(--transition);
}

.problem-card:hover {
  transform: translateY(-4px);
  border-color: rgba(245, 166, 35, 0.3);
}

.problem-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.problem-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.75rem;
}

.problem-card p {
  font-size: 0.95rem;
}

/* --- Solution Section --- */
.solution-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.solution-card {
  background: var(--color-surface);
  padding: 2.5rem;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  transition: transform var(--transition), border-color var(--transition);
}

.solution-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-accent);
}

.solution-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--color-accent-glow);
  color: var(--color-accent);
  font-weight: 700;
  font-size: 1.1rem;
  border-radius: 10px;
  margin-bottom: 1.25rem;
}

.solution-card h3 {
  margin-bottom: 0.75rem;
}

.solution-tech {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-accent);
  background: var(--color-accent-glow);
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  margin-top: 1rem;
  font-family: var(--font-mono);
}

/* --- Case Study Section --- */
.case-study {
  background: var(--color-surface);
}

.case-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2rem;
}

.case-brand {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--color-white);
}

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

.case-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.case-metric {
  background: var(--color-primary-light);
  padding: 1.75rem;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  text-align: center;
}

.case-metric-value {
  font-size: 2.5rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 0.3rem;
}

.case-metric-value.gold {
  color: var(--color-gold);
}

.case-metric-label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 0.25rem;
}

.case-metric-target {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  opacity: 0.7;
}

.case-details {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.case-detail-card {
  background: var(--color-primary-light);
  padding: 2rem;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}

.case-detail-card h3 {
  font-size: 1rem;
  margin-bottom: 1rem;
  color: var(--color-accent);
}

.case-detail-card ul {
  list-style: none;
  padding: 0;
}

.case-detail-card li {
  padding: 0.5rem 0;
  font-size: 0.95rem;
  color: var(--color-text-muted);
  border-bottom: 1px solid var(--color-border);
}

.case-detail-card li:last-child {
  border-bottom: none;
}

.case-detail-card li strong {
  color: var(--color-white);
}

.case-quote {
  margin-top: 3rem;
  padding: 2rem;
  background: var(--color-primary-light);
  border-left: 3px solid var(--color-accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-style: italic;
  font-size: 1.1rem;
  color: var(--color-text);
}

/* --- How It Works --- */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 2rem;
  counter-reset: step;
}

.step {
  position: relative;
  padding: 2rem;
  background: var(--color-surface);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  counter-increment: step;
}

.step::before {
  content: counter(step);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: var(--color-accent);
  color: var(--color-primary);
  font-weight: 800;
  font-size: 1.2rem;
  border-radius: 50%;
  margin-bottom: 1.25rem;
}

.step h3 {
  margin-bottom: 0.75rem;
}

.step-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-gold);
  margin-top: 1rem;
}

/* --- Mexico Opportunity --- */
.mexico {
  background: var(--color-surface);
}

.mexico-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}

.mexico-card {
  background: var(--color-primary-light);
  padding: 2rem;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  text-align: center;
}

.mexico-card-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-gold);
  font-family: var(--font-mono);
  margin-bottom: 0.25rem;
}

.mexico-card-label {
  font-size: 0.95rem;
  color: var(--color-white);
  margin-bottom: 0.5rem;
}

.mexico-card p {
  font-size: 0.85rem;
}

/* --- FAQ --- */
.faq-list {
  max-width: 780px;
  margin: 0 auto;
}

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

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 1.5rem 0;
  background: none;
  border: none;
  color: var(--color-white);
  font-family: var(--font-main);
  font-size: 1.05rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  transition: color var(--transition);
}

.faq-question:hover {
  color: var(--color-accent);
}

.faq-icon {
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--color-accent);
  transition: transform var(--transition);
  flex-shrink: 0;
  margin-left: 1rem;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding-bottom: 1.5rem;
}

.faq-answer p {
  font-size: 0.95rem;
  line-height: 1.7;
}

/* --- CTA / Form Section --- */
.cta-section {
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-surface));
  text-align: center;
}

.cta-section h2 {
  margin-bottom: 1rem;
}

.cta-section .section-subtitle {
  margin-left: auto;
  margin-right: auto;
}

.form-container {
  max-width: 560px;
  margin: 0 auto;
  background: var(--color-primary);
  padding: 2.5rem;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
}

.form-group {
  margin-bottom: 1.25rem;
  text-align: left;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.4rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.8rem 1rem;
  font-family: var(--font-main);
  font-size: 0.95rem;
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition);
  outline: none;
}

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

.form-group input::placeholder {
  color: var(--color-text-muted);
  opacity: 0.6;
}

.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='%238d99ae' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}

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

.form-submit {
  width: 100%;
  margin-top: 0.5rem;
}

.form-note {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: 1rem;
  opacity: 0.7;
}

.form-success {
  display: none;
  text-align: center;
  padding: 2rem;
}

.form-success.visible {
  display: block;
}

.form-success h3 {
  color: var(--color-accent);
  margin-bottom: 0.5rem;
}

/* --- Footer --- */
.footer {
  padding: 3rem 0;
  border-top: 1px solid var(--color-border);
}

.footer .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-logo {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--color-white);
}

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

.footer-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.footer-links a {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

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

.footer-copy {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  opacity: 0.6;
}

/* --- Animations --- */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  section {
    padding: 3.5rem 0;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(11, 18, 32, 0.98);
    backdrop-filter: blur(12px);
    padding: 1.5rem;
    gap: 1rem;
    border-bottom: 1px solid var(--color-border);
  }

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

  .nav-toggle {
    display: flex;
  }

  .hero {
    min-height: auto;
    padding-top: 7rem;
    padding-bottom: 3rem;
  }

  .hero-stats {
    gap: 1.5rem;
  }

  .hero-stat-value {
    font-size: 1.5rem;
  }

  .case-details {
    grid-template-columns: 1fr;
  }

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

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

  .footer-links {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: 1.75rem;
  }

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

  .case-metric-value {
    font-size: 1.8rem;
  }

  .form-container {
    padding: 1.5rem;
  }
}