:root{
  /* Primary (Indigo) tones */
  --md-primary-50:  #E8EAF6;
  --md-primary-100: #C5CAE9;
  --md-primary-200: #9FA8DA;
  --md-primary-300: #7986CB;
  --md-primary-400: #5C6BC0;
  --md-primary-500: #3F51B5; /* primary main */
  --md-primary-600: #3949AB;
  --md-primary-700: #303F9F;
  --md-primary-800: #283593;
  --md-primary-900: #1A237E;

  /* Secondary (Teal) tones */
  --md-secondary-50:  #E0F2F1;
  --md-secondary-100: #B2DFDB;
  --md-secondary-200: #80CBC4;
  --md-secondary-300: #4DB6AC;
  --md-secondary-400: #26A69A;
  --md-secondary-500: #009688; /* secondary main */
  --md-secondary-600: #00897B;
  --md-secondary-700: #00796B;
  --md-secondary-800: #00695C;
  --md-secondary-900: #004D40;

  /* App-level color usage */
  --color-primary: var(--md-primary-500);
  --color-primary-variant: var(--md-primary-700);
  --color-secondary: var(--md-secondary-500);
  --color-surface: #FFFFFF;
  --color-background: var(--md-primary-50);
  --color-on-primary: #FFFFFF;
  --color-on-surface: rgba(0,0,0,0.87);
  --color-on-surface-muted: rgba(0,0,0,0.6);
  --color-disabled: rgba(0,0,0,0.38);
  --color-error: #B00020;

  /* Spacing / sizing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 12px;
  --space-lg: 16px;
  --space-xl: 24px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;

  /* Elevation shadows (Material-like) */
  --elevation-1: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
  --elevation-2: 0 3px 6px rgba(0,0,0,0.16), 0 3px 6px rgba(0,0,0,0.23);
  --elevation-3: 0 10px 20px rgba(0,0,0,0.19), 0 6px 6px rgba(0,0,0,0.23);

  /* Typography scale */
  --font-family: 'Roboto', system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;;
  --font-size-base: 14px;
  --font-size-lg: 16px;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-bold: 700;

  /* Animation */
  --transition-fast: 150ms cubic-bezier(.4,0,.2,1);
  --transition-medium: 240ms cubic-bezier(.4,0,.2,1);

  --bg: #ffffff;
  --muted: #6b7280;
  --text: #0f172a;
  --accent: var(--md-primary-500);
  --accent-2: --color-secondary;
  --card-bg: #ffffff;
  --glass: rgba(15,23,42,0.04);
  --shadow-1: 0 6px 18px rgba(11,105,255,0.08);
  --shadow-2: 0 10px 30px rgba(15,23,42,0.06);
  --radius-md: 14px;
  --radius-sm: 10px;
  font-synthesis: none;
}

*{box-sizing:border-box}

html,body{height:100%}

body{
  margin:0; padding:32px; background:var(--bg); color:var(--text);
  font-family: var(--font-family);
  -webkit-font-smoothing:antialiased; -moz-osx-font-smoothing:grayscale;
}

h2 {
  text-align: center;
}

p {
  color:var(--muted);
}

ol, ul {
  padding-left: 20px;
  color:var(--muted)
}

li + li {
  margin-top: 5px;
}

select,
::picker(select) {
  appearance: base-select;
  border-radius: 10px;
  border: 1px solid #eef2ff;
  color: var(--muted);
  cursor: pointer;
}

select::picker-icon {
  transition: 0.4s rotate;
}

select:open::picker-icon {
  rotate: 180deg;
}

option::checkmark {
  display:none;
}

option:checked {
  background: var(--accent);
  color: var(--color-on-primary);
}

.lang-select {
  font-family: inherit;
  padding:8px 12px;
  border-radius:10px;
  border:1px solid #eef2ff;
  background:transparent
}

.lang-select:focus {
  outline: none;
}

.text-center {
  text-align: center;
}

.avatar {
  display:flex;
  justify-content:center;
}

.reviewer-name {
  margin-top: 16px;
  font-weight: 700;
}

.avatar img {
  width: 100px;
  border-radius: 999px;
}

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

.header {
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px
}

.brand{display:flex; align-items:center; gap:12px}

.logo{width:44px; height:44px; border-radius:10px; background:linear-gradient(135deg,var(--accent),#4b8bff); box-shadow:var(--shadow-1); display:flex; align-items:center; justify-content:center; color:#fff; font-weight:700}

.site-title{font-weight:700; font-size:1rem}

.hero{display:grid; grid-template-columns:1fr 360px; gap:28px; align-items:center; margin-top:26px}

.hero-card{background:linear-gradient(180deg, rgba(11,105,255,0.02), rgba(255,183,3,0.01)); padding:28px; border-radius:18px; box-shadow:var(--shadow-2); border:1px solid rgba(11,105,255,0.04)}

.h-title{margin:0; font-size:clamp(1.4rem,2.4vw,2rem); line-height:1.05}

.h-lead{color:var(--muted); margin-top:10px}

.cta-row{margin-top:18px; display:flex; gap:12px; align-items:center}

.btn {
  font-family: inherit;
  font-size: var(--font-size-base);
  border-radius: 999px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: box-shadow var(--transition-fast), transform var(--transition-fast), background var(--transition-fast), color var(--transition-fast);
  border: none;
  text-decoration: none;
  user-select: none;
  -webkit-appearance: none;
  vertical-align: middle;
  display:inline-flex;
  gap:10px;
  padding:12px 16px;
  font-weight:700
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-on-primary);
  box-shadow: var(--elevation-1);
  font-weight: var(--font-weight-medium);
}

.btn-primary:hover {
  background: var(--color-primary-variant);
  box-shadow: var(--elevation-2);
  transform: translateY(-1px);
}

.btn-primary:active { transform: translateY(0); }

.btn-ghost {
  background:transparent;
  border:2px solid rgba(15,23,42,0.06);
  color:var(--text);
  transition: border 0.4s;
}

.btn-ghost:hover {
  border: 2px solid var(--muted);
}

.visual-card{display:flex; align-items:center; justify-content:center}

.visual-card img{max-width:100%; border-radius:12px; box-shadow:var(--shadow-1)}

.section{margin-top:28px}

.cards-container {
  display: flex;
  justify-content: space-evenly;
}

.card {
  max-width: 400px;
  padding: var(--space-md);
  margin: 10px;
  border-radius: var(--radius-sm);
  background: linear-gradient(180deg, rgba(255,255,255,0.96), rgba(255,255,255,0.98));
  box-shadow: var(--elevation-1);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  border: 1px solid rgba(0,0,0,0.03);
  display: flex;
  flex: 1;
  flex-direction: column;
}

.card .title{font-weight:700}

.price{font-size:1.6rem; font-weight:800}

.card p {
  color:var(--muted);
}

.info-btn {
  display: inline;
  position: relative;
  padding: 0 6px;
  border-radius: 999px;
  background: var(--accent);
  color: var(--color-on-primary);
  cursor: pointer;
}

.info-btn:hover .info-container {
  display: block;
}

.info-container {
  display: none;
  position: absolute;
  color: var(--color-on-surface);
  border-radius: var(--radius-sm);
  padding: var(--space-md);
  background: linear-gradient(180deg, rgba(255,255,255,0.96), rgba(255,255,255,0.98));
  box-shadow: 0 1px 3px var(--md-primary-100), 0 1px 2px var(--md-primary-200);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  border: 1px solid var(--md-primary-200);
  font-weight: var(--font-weight-regular);
}

.icons-container {
  display: flex;
  justify-content: center;
}

.arrow-down {
  display: none;
}

.how-list{margin-top:14px; color:var(--muted)}

.footer {
  margin-top: var(--space-lg);
  padding: var(--space-lg) 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.footer p {
  margin: 0;
  text-align: center;
}

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

.footer a:hover {
  text-decoration: underline;
  transition: text-decoration var(--transition-fast);
}

/* responsive */
@media (max-width:600px){
  .hero{
    grid-template-columns:1fr;
  }

  .cards-container {
    flex-direction: column;
  }

  .icons-container {
    flex-direction: column;
    align-items: center;
  }

  .arrow-right {
    display: none;
  }

  .arrow-down {
    display: block;
  }

  body {
    padding:20px
  }
}

/* small screens */
@media (max-width:420px){
  .logo {
    width:40px;
    height:40px;
  }
}

/* utility */
.kv{display:flex; gap:10px; align-items:center}
.kv .dot{width:10px;height:10px;border-radius:50%;background:var(--accent-2)}

/* small accessibility tweaks */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}