/* --- Variables --- */
:root {
  --color-bg: #fafafa;
  --color-surface: #ffffff;
  --color-text: #1a1a1a;
  --color-text-muted: #5a5a5a;
  --color-primary: #007bff;
  --color-primary-hover: #0069d9;
  --color-primary-light: #e8f2ff;
  --color-border: #e5e7eb;
  --color-accent: #007bff;
  --font-sans: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  --font-mono: ui-monospace, monospace;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --max-width: 1200px;
}

/* --- Reset & base --- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  overflow-x: hidden;
}

a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* SEO & a11y: hide from view, keep for screen readers and crawlers */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}
@media (max-width: 640px) {
  .container { padding: 0 var(--space-md); }
}

/* --- Header --- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 3.5rem;
  gap: var(--space-md);
  flex-wrap: wrap;
}
.logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-text);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}
.logo:hover { text-decoration: none; color: var(--color-primary); }
.logo-img {
  height: 2rem;
  width: auto;
  display: block;
  object-fit: contain;
}

/* Hamburger: hidden on desktop */
.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  border-radius: var(--radius-sm);
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
}
.nav-toggle-bar {
  display: block;
  width: 1.25rem;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition: transform 0.2s, opacity 0.2s;
}
.header.nav-open .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.header.nav-open .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}
.header.nav-open .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  flex-wrap: wrap;
}
.nav-link {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
}
.nav-link:hover { color: var(--color-text); }
.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
}
.lang-label {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-right: var(--space-sm);
}
.lang-btn {
  padding: var(--space-xs) var(--space-sm);
  font-size: 0.8125rem;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  cursor: pointer;
}
.lang-btn:hover { border-color: var(--color-primary); color: var(--color-primary); }
.lang-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
}

/* Mobile: show hamburger, nav as drawer */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }
  .nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-md);
    gap: var(--space-sm);
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.3s ease, opacity 0.2s ease;
  }
  .header.nav-open .nav {
    max-height: 80vh;
    opacity: 1;
  }
  .nav .nav-link {
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-sm);
    font-size: 1rem;
  }
  .nav .nav-link:hover {
    background: var(--color-bg);
  }
  .nav .lang-switch {
    padding: var(--space-sm) var(--space-md);
    border-top: 1px solid var(--color-border);
    margin-top: var(--space-xs);
  }
  .nav .lang-label {
    margin-right: var(--space-md);
  }
  .nav .btn {
    margin-top: var(--space-xs);
    text-align: center;
  }
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  padding: var(--space-sm) var(--space-lg);
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  text-align: center;
  text-decoration: none;
  transition: background 0.2s, color 0.2s;
}
.btn-sm { padding: var(--space-xs) var(--space-md); font-size: 0.875rem; }
.btn-lg { padding: var(--space-md) var(--space-xl); font-size: 1.0625rem; }
.btn-primary {
  background: var(--color-primary);
  color: white;
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  text-decoration: none;
  color: white;
}
.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border: 2px solid var(--color-border);
}
.btn-secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  text-decoration: none;
}

/* --- Hero --- */
.hero {
  padding: var(--space-3xl) 0;
  text-align: center;
  background: linear-gradient(180deg, var(--color-surface) 0%, var(--color-bg) 100%);
}
.hero-title {
  margin: 0 0 var(--space-md);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
}
.hero-logo {
  display: block;
  max-width: 340px;
  width: 100%;
  height: auto;
  margin: 0 auto;
}
.hero-subtitle {
  margin: 0 0 var(--space-xl);
  max-width: 36rem;
  margin-left: auto;
  margin-right: auto;
  font-size: 1.125rem;
  color: var(--color-text-muted);
}
.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  justify-content: center;
}
@media (max-width: 640px) {
  .hero {
    padding: var(--space-2xl) 0;
  }
  .hero-cta {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-cta .btn { width: 100%; }
}

/* --- Section titles --- */
.section-title {
  margin: 0 0 var(--space-sm);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  text-align: center;
}
.section-subtitle {
  margin: 0 0 var(--space-2xl);
  text-align: center;
  color: var(--color-text-muted);
  max-width: 32rem;
  margin-left: auto;
  margin-right: auto;
}
@media (max-width: 640px) {
  .section-title { font-size: 1.375rem; }
  .section-subtitle { margin-bottom: var(--space-xl); font-size: 0.9375rem; }
}

/* --- Advantages (Kelebihan) --- */
.advantages {
  padding: var(--space-3xl) 0;
  background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-primary-light) 50%, var(--color-bg) 100%);
}
@media (max-width: 640px) {
  .advantages { padding: var(--space-2xl) 0; }
}
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-lg);
}
@media (max-width: 640px) {
  .advantages-grid { grid-template-columns: 1fr; gap: var(--space-md); }
}
.advantage-card {
  padding: var(--space-xl);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}
.advantage-card .advantage-title {
  margin: 0 0 var(--space-sm);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-primary);
}
.advantage-card .advantage-desc {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

/* --- Features --- */
.features {
  padding: var(--space-3xl) 0;
}
@media (max-width: 640px) {
  .features { padding: var(--space-2xl) 0; }
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
}
@media (max-width: 640px) {
  .features-grid { grid-template-columns: 1fr; gap: var(--space-md); }
}
.feature-card {
  padding: var(--space-xl);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}
.feature-title {
  margin: 0 0 var(--space-sm);
  font-size: 1.125rem;
  font-weight: 600;
}
.feature-desc {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}
.feature-items {
  list-style: none;
  padding: 0;
  margin: var(--space-sm) 0 0;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}
.feature-items li {
  padding: var(--space-xs) 0;
  padding-left: 1.25rem;
  position: relative;
}
.feature-items li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 600;
}

/* --- Pricing --- */
.pricing {
  padding: var(--space-3xl) 0;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
}
.pricing-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-2xl);
  flex-wrap: wrap;
}
@media (max-width: 640px) {
  .pricing { padding: var(--space-2xl) 0; }
  .pricing-toggle { margin-bottom: var(--space-xl); }
}
.pricing-toggle-yearly {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
}
.pricing-toggle-yearly .toggle-badge {
  margin-left: 0;
}
.toggle-btn {
  padding: var(--space-sm) var(--space-lg);
  font-size: 0.9375rem;
  font-weight: 600;
  border: 2px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text-muted);
  border-radius: var(--radius-md);
  cursor: pointer;
}
.toggle-btn:hover { border-color: var(--color-primary); color: var(--color-primary); }
.toggle-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
}
.toggle-badge {
  font-size: 0.8125rem;
  color: var(--color-primary);
  font-weight: 600;
  margin-left: var(--space-sm);
}
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}
@media (max-width: 1024px) {
  .pricing-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .pricing-grid { grid-template-columns: 1fr; }
}
.pricing-card {
  padding: var(--space-xl);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  position: relative;
}
.pricing-card.featured {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}
.pricing-card h3 {
  margin: 0 0 var(--space-xs);
  font-size: 1.25rem;
  font-weight: 700;
}
.pricing-card .plan-target {
  margin: 0 0 var(--space-md);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}
.pricing-card .plan-price-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin-bottom: var(--space-xs);
}
.pricing-card .plan-price {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: var(--space-xs);
  white-space: nowrap;
}
.pricing-card .plan-price-note {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
  white-space: nowrap;
}
.pricing-card .plan-limits {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}
.pricing-card .plan-features {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-lg);
  flex: 1;
  font-size: 0.875rem;
}
.pricing-card .plan-features li {
  padding: var(--space-xs) 0;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}
.pricing-card .plan-features .check { color: var(--color-primary); flex-shrink: 0; }
.pricing-card .plan-features .cross { color: var(--color-border); flex-shrink: 0; }
.pricing-card .plan-features .addon-badge {
  flex-shrink: 0;
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--color-primary);
  background: var(--color-primary-light);
  padding: 0.15rem 0.4rem;
  border-radius: var(--radius-sm);
}
.pricing-card .plan-cta {
  margin-top: auto;
  width: 100%;
}
@media (max-width: 640px) {
  .pricing-card {
    padding: var(--space-lg);
  }
  .pricing-card .plan-features {
    font-size: 0.8125rem;
  }
}
.addons {
  padding: var(--space-lg);
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}
.addons-title {
  margin: 0 0 var(--space-md);
  font-size: 1rem;
  font-weight: 600;
}
.addons-list {
  margin: 0;
  padding-left: var(--space-lg);
  font-size: 0.875rem;
  color: var(--color-text-muted);
}
.addons-list li { margin-bottom: var(--space-xs); }
@media (max-width: 640px) {
  .addons { padding: var(--space-md); }
}

/* --- CTA section --- */
.cta-section {
  padding: var(--space-3xl) 0;
  text-align: center;
  background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-primary-light) 100%);
}
.cta-title {
  margin: 0 0 var(--space-sm);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
}
.cta-subtitle {
  margin: 0 0 var(--space-xl);
  color: var(--color-text-muted);
  font-size: 1.0625rem;
}
.cta-button:hover { text-decoration: none; color: white; }
@media (max-width: 640px) {
  .cta-section { padding: var(--space-2xl) 0; }
  .cta-section .btn { width: 100%; }
}

/* --- Footer --- */
.footer {
  padding: var(--space-xl) 0;
  background: var(--color-text);
  color: #e5e7eb;
  font-size: 0.875rem;
}
.footer a { color: #a5b4fc; }
.footer a:hover { color: #c7d2fe; text-decoration: underline; }
.footer-inner {
  text-align: center;
}
.footer-logo {
  font-weight: 700;
  display: block;
  margin-bottom: var(--space-md);
}
.footer-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-lg);
  margin-bottom: var(--space-md);
}
@media (max-width: 640px) {
  .footer { padding: var(--space-lg) 0; font-size: 0.8125rem; }
  .footer-links { gap: var(--space-md); }
}
.footer-copyright {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.8125rem;
}