/* ===== Tokens ===== */
:root {
  --navy: #284162;
  --navy-dark: #1c2f47;
  --red: #F81200;
  --telegram: #229ED9;
  --telegram-dark: #1a8ac4;
  --green: #16a34a;
  --green-light: #dcfce7;
  --white: #ffffff;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;

  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.8125rem);
  --text-sm: clamp(0.8125rem, 0.78rem + 0.2vw, 0.875rem);
  --text-base: clamp(0.9375rem, 0.9rem + 0.2vw, 1rem);
  --text-lg: clamp(1.0625rem, 1rem + 0.35vw, 1.1875rem);
  --text-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.625rem);
  --text-2xl: clamp(1.625rem, 1.3rem + 1.5vw, 2.25rem);

  --space-1: 0.25rem; --space-2: 0.5rem; --space-3: 0.75rem;
  --space-4: 1rem; --space-5: 1.25rem; --space-6: 1.5rem;
  --space-8: 2rem; --space-10: 2.5rem; --space-12: 3rem;
  --space-16: 4rem; --space-20: 5rem;

  --radius-sm: 0.375rem; --radius-md: 0.5rem;
  --radius-lg: 0.75rem; --radius-xl: 1rem; --radius-2xl: 1.25rem;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 10px 30px rgba(0,0,0,0.1);
  --transition: 200ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; text-rendering: optimizeLegibility; scroll-behavior: smooth; }
body { min-height: 100dvh; font-family: var(--font); font-size: var(--text-base); color: var(--gray-800); background: var(--white); line-height: 1.6; display: flex; flex-direction: column; }
img { display: block; max-width: 100%; height: auto; }
a { text-decoration: none; color: inherit; }
button { cursor: pointer; background: none; border: none; font: inherit; }

.container { max-width: 580px; margin: 0 auto; padding: 0 var(--space-5); }

/* ===== Header ===== */
.header {
  padding: var(--space-3) 0 0;
  border-bottom: 1px solid var(--gray-200);
  background: var(--white);
}

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

.logo { height: 100px; width: auto; }

.lang-toggle {
  display: flex; align-items: center; gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm); font-weight: 500; color: var(--gray-500);
  transition: background var(--transition);
}
.lang-toggle:hover { background: var(--gray-100); }
.lang-sep { color: var(--gray-300); }
.lang-option { color: var(--gray-400); transition: color var(--transition); }
.lang-option.active { color: var(--navy); font-weight: 600; }

/* ===== Main ===== */
.main { flex: 1; padding: var(--space-8) 0 var(--space-12); }

/* ===== Badge ===== */
.badge {
  display: inline-flex; align-items: center; gap: var(--space-2);
  padding: var(--space-1) var(--space-3) var(--space-1) var(--space-2);
  background: var(--green-light); color: var(--green);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm); font-weight: 600;
  margin-bottom: var(--space-6);
  opacity: 0; transform: translateY(8px);
  transition: opacity 400ms ease, transform 400ms ease;
}
.badge.visible { opacity: 1; transform: translateY(0); }
.badge svg { width: 18px; height: 18px; }

/* ===== Heading ===== */
.heading {
  font-size: var(--text-2xl); font-weight: 800;
  color: var(--navy); line-height: 1.15;
  margin-bottom: var(--space-3);
  opacity: 0; transform: translateY(8px);
  transition: opacity 400ms ease 100ms, transform 400ms ease 100ms;
}
.heading.visible { opacity: 1; transform: translateY(0); }

.subtext {
  font-size: var(--text-lg); color: var(--gray-600);
  line-height: 1.5; margin-bottom: var(--space-8);
  max-width: 480px;
  opacity: 0; transform: translateY(8px);
  transition: opacity 400ms ease 200ms, transform 400ms ease 200ms;
}
.subtext.visible { opacity: 1; transform: translateY(0); }

/* ===== Primary CTA ===== */
.cta {
  display: flex; align-items: center; gap: var(--space-4);
  width: 100%;
  padding: var(--space-5) var(--space-6);
  background: var(--navy);
  color: var(--white);
  border-radius: var(--radius-2xl);
  transition: all var(--transition);
  opacity: 0; transform: translateY(8px);
  transition: opacity 400ms ease 300ms, transform 400ms ease 300ms, background 200ms ease, box-shadow 200ms ease;
}
.cta.visible { opacity: 1; transform: translateY(0); }
.cta:hover { background: var(--navy-dark); box-shadow: var(--shadow-lg); }

.cta-icon {
  flex-shrink: 0;
  width: 48px; height: 48px;
  background: rgba(255,255,255,0.15);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
}
.cta-icon svg { width: 26px; height: 26px; }

.cta-text { flex: 1; }

.cta-label {
  display: block;
  font-size: var(--text-lg); font-weight: 700;
  line-height: 1.3;
}

.cta-sub {
  display: block;
  font-size: var(--text-xs);
  opacity: 0.65; font-weight: 400;
  margin-top: 2px;
}

.cta-arrow {
  flex-shrink: 0;
  width: 24px; height: 24px;
  opacity: 0.7;
  transition: transform var(--transition), opacity var(--transition);
}
.cta:hover .cta-arrow { transform: translateX(4px); opacity: 1; }

/* Pulse animation */
@keyframes ctaPulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(40, 65, 98, 0.4); }
  50% { box-shadow: 0 0 0 12px rgba(40, 65, 98, 0); }
}
.cta.pulse { animation: ctaPulse 2s ease-in-out 3; }

/* ===== Nudge ===== */
.nudge {
  display: flex; align-items: center; gap: var(--space-2);
  margin-top: var(--space-4);
  font-size: var(--text-sm); color: var(--gray-500);
  opacity: 0; transform: translateY(8px);
  transition: opacity 400ms ease 400ms, transform 400ms ease 400ms;
}
.nudge.visible { opacity: 1; transform: translateY(0); }

.nudge-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--green);
  flex-shrink: 0;
  animation: blink 2s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* ===== Expand Section ===== */
.expand-section {
  margin-top: var(--space-8);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-xl);
  overflow: hidden;
  opacity: 0; transform: translateY(8px);
  transition: opacity 400ms ease 500ms, transform 400ms ease 500ms;
}
.expand-section.visible { opacity: 1; transform: translateY(0); }

.expand-trigger {
  display: flex; align-items: center; justify-content: space-between;
  width: 100%;
  padding: var(--space-4) var(--space-5);
  font-size: var(--text-sm); font-weight: 600;
  color: var(--gray-600);
  transition: background var(--transition);
}
.expand-trigger:hover { background: var(--gray-50); }

.expand-chevron {
  width: 20px; height: 20px; color: var(--gray-400);
  transition: transform 300ms ease;
}
.expand-trigger[aria-expanded="true"] .expand-chevron {
  transform: rotate(180deg);
}

.expand-content {
  max-height: 0; opacity: 0; overflow: hidden;
  transition: max-height 400ms ease, opacity 300ms ease;
}

.install-steps {
  padding: 0 var(--space-5) var(--space-5);
  display: flex; flex-direction: column; gap: var(--space-4);
}

.install-step {
  display: flex; gap: var(--space-3); align-items: flex-start;
}

.install-num {
  flex-shrink: 0;
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--gray-100); color: var(--gray-600);
  font-size: var(--text-xs); font-weight: 700;
  display: flex; align-items: center; justify-content: center;
}

.install-text {
  font-size: var(--text-sm); color: var(--gray-700);
  line-height: 1.5; margin-bottom: var(--space-3);
}

.install-buttons {
  display: flex; gap: var(--space-2); flex-wrap: wrap;
}

.store-btn {
  display: inline-flex; align-items: center; gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--gray-900); color: var(--white);
  border-radius: var(--radius-md);
  font-size: var(--text-xs); font-weight: 500;
  transition: background var(--transition);
}
.store-btn:hover { background: var(--gray-700); }
.store-btn svg { width: 16px; height: 16px; }

/* ===== Prompt Section ===== */
.prompt-section {
  margin-top: var(--space-10);
  opacity: 0; transform: translateY(8px);
  transition: opacity 400ms ease 600ms, transform 400ms ease 600ms;
}
.prompt-section.visible { opacity: 1; transform: translateY(0); }

.prompt-label {
  font-size: var(--text-sm); font-weight: 600;
  color: var(--gray-500); text-transform: uppercase;
  letter-spacing: 0.03em;
  margin-bottom: var(--space-3);
}

.prompt-cards {
  display: flex; flex-direction: column; gap: var(--space-2);
}

.prompt-card {
  display: block; width: 100%; text-align: left;
  padding: var(--space-3) var(--space-4);
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm); color: var(--gray-600);
  font-style: italic;
  transition: all var(--transition);
  line-height: 1.5;
}
.prompt-card:hover {
  border-color: var(--navy);
  color: var(--navy);
  background: var(--white);
  box-shadow: var(--shadow-sm);
}

/* ===== Footer ===== */
.footer {
  padding: var(--space-6) 0;
  border-top: 1px solid var(--gray-200);
  background: var(--gray-50);
}

.footer .container {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: var(--space-3);
}

.footer-text { font-size: var(--text-xs); color: var(--gray-400); }

.footer-help {
  display: flex; align-items: center; gap: var(--space-2);
  font-size: var(--text-xs); color: var(--gray-400);
  transition: color var(--transition);
}
.footer-help:hover { color: var(--gray-600); }

/* ===== Mobile ===== */
@media (max-width: 640px) {
  .logo { height: 72px; }

  .main { padding: var(--space-6) 0 var(--space-10); }

  .cta { padding: var(--space-4) var(--space-5); }

  .cta-icon { width: 42px; height: 42px; }
  .cta-icon svg { width: 22px; height: 22px; }

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