/* Reset & base */
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --font-main: 'Inter', Arial, sans-serif;
  --color-bg: #f5f7fa;
  --color-bg-dark: #e9ecf3;
  --color-text: #181a1b;
  --color-accent: #3a47b8;
  --color-accent-hover: #232a5c;
  --color-section: #fff;
  --color-border: #e0e4ef;
  --radius: 14px;
  --transition: 0.18s cubic-bezier(.4,0,.2,1);
  --shadow: 0 2px 16px 0 rgba(34,40,80,0.06);
}
html { font-size: 18px; scroll-behavior: smooth; }
body {
  font-family: var(--font-main);
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
header {
  background: var(--color-section);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 10;
  box-shadow: 0 1px 8px 0 rgba(34,40,80,0.03);
}
nav {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 2.5rem;
}
header nav {
  position: relative;
}
.logo {
  font-weight: 900;
  font-size: 2rem;
  letter-spacing: 1px;
  color: var(--color-text);
  user-select: none;
}
.logo-accent {
  color: var(--color-accent);
  font-weight: 900;
}
.nav-links {
  list-style: none;
  display: flex;
  gap: 2.5rem;
}
.nav-links a {
  text-decoration: none;
  color: var(--color-text);
  font-weight: 500;
  font-size: 1.08rem;
  letter-spacing: 0.01em;
  position: relative;
  transition: color var(--transition);
}
.nav-links a::after {
  content: '';
  display: block;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition);
  position: absolute;
  left: 0; bottom: -4px;
}
.nav-links a:hover {
  color: var(--color-accent);
}
.nav-links a:hover::after {
  width: 100%;
}
.hero {
  max-width: 900px;
  margin: 5rem auto 0 auto;
  text-align: center;
  padding: 5rem 2rem 4rem 2rem;
}
.hero h1 {
  font-size: 3.2rem;
  font-weight: 900;
  margin-bottom: 1.6rem;
  letter-spacing: -1.5px;
  line-height: 1.08;
}
.hero p {
  font-size: 1.25rem;
  margin-bottom: 2.8rem;
  color: #444;
  font-weight: 400;
}
.cta {
  display: inline-block;
  background: var(--color-accent);
  color: #fff;
  padding: 1.1rem 2.8rem;
  border-radius: 8px;
  font-size: 1.13rem;
  font-weight: 700;
  text-decoration: none;
  box-shadow: var(--shadow);
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  letter-spacing: 0.03em;
}
.cta:hover {
  background: var(--color-accent-hover);
  transform: translateY(-2px) scale(1.04);
  box-shadow: 0 4px 24px 0 rgba(58,71,184,0.13);
}
.section {
  max-width: 820px;
  margin: 4rem auto;
  background: var(--color-section);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 3.5rem 2.5rem;
  border: 1px solid var(--color-border);
}
.section h2 {
  font-size: 2.1rem;
  margin-bottom: 1.3rem;
  font-weight: 800;
  letter-spacing: -0.5px;
}
.features-list {
  list-style: disc inside;
  color: var(--color-accent);
  font-size: 1.13rem;
  margin-left: 1.5rem;
  line-height: 1.7;
}
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.3rem;
  margin-top: 1.7rem;
}
.form-group {
  position: relative;
}
.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 1.1rem 1.1rem 1.1rem 0.9rem;
  border-radius: 7px;
  border: 1.2px solid var(--color-border);
  font-size: 1.05rem;
  font-family: var(--font-main);
  background: var(--color-bg-dark);
  resize: none;
  transition: border var(--transition), box-shadow var(--transition), background var(--transition);
  color: var(--color-text);
}
.contact-form input:focus,
.contact-form textarea:focus {
  border: 1.5px solid var(--color-accent);
  outline: none;
  background: #fff;
  box-shadow: 0 0 0 2px #3a47b822;
}
.contact-form input::placeholder,
.contact-form textarea::placeholder {
  color: #b0b5c3;
  opacity: 1;
  transition: opacity 0.18s;
}
.contact-form input:focus::placeholder,
.contact-form textarea:focus::placeholder {
  opacity: 0;
}
.contact-form button {
  background: var(--color-accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 1.1rem 0;
  font-size: 1.13rem;
  font-weight: 700;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: var(--shadow);
  letter-spacing: 0.03em;
}
.contact-form button:hover {
  background: var(--color-accent-hover);
  transform: translateY(-2px) scale(1.04);
  box-shadow: 0 4px 24px 0 rgba(58,71,184,0.13);
}
footer {
  text-align: center;
  color: #888;
  font-size: 1.05rem;
  padding: 2.5rem 0 1.2rem 0;
  margin-top: auto;
  letter-spacing: 0.01em;
}
.fade-in {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s cubic-bezier(.4,0,.2,1), transform 0.7s cubic-bezier(.4,0,.2,1);
}
.visible {
  opacity: 1;
  transform: none;
}
@media (max-width: 900px) {
  nav { padding: 0.5rem 1.2rem; }
  .hero { padding: 3.5rem 1rem 2.5rem 1rem; }
  .section { padding: 2rem 1rem; }
}
@media (max-width: 600px) {
  .hero h1 { font-size: 1.3rem; }
  .section h2 { font-size: 1.05rem; }
  .nav-links { gap: 0.7rem; }
  nav { flex-direction: column; gap: 0.7rem; }
  .hero { padding: 1.2rem 0.5rem 1.2rem 0.5rem; }
  .section { padding: 1.1rem 0.3rem; border-radius: 7px; }
  .cta { font-size: 0.98rem; padding: 0.7rem 1.2rem; border-radius: 6px; }
  .reviews-grid, .features-list { grid-template-columns: 1fr !important; gap: 1.1rem 0.5rem; }
  .review-card { min-height: 140px; padding: 1.1rem 0.7rem; border-radius: 7px; }
  .review-avatar { width: 36px; height: 36px; font-size: 1.1rem; margin-bottom: 0.6rem; }
  .review-name { font-size: 0.98rem; }
  .review-text { font-size: 0.95rem; }
  .faq-list { gap: 0.7rem; }
  .faq-list details { padding: 0.5rem 0.5rem; border-radius: 6px; }
  .faq-list summary { font-size: 0.98rem; }
  .contact-form { gap: 0.7rem; }
  .form-group input, .form-group textarea, .contact-form button { font-size: 0.98rem; border-radius: 6px; padding: 0.7rem 0.7rem 0.7rem 0.7rem; }
  .screenshots { flex-direction: column !important; gap: 1rem !important; }
  .screenshots > div { width: 100% !important; min-width: 0 !important; }
} 

/* Reviews grid */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2.2rem 1.2rem;
  margin-top: 2.2rem;
}
.review-card {
  background: var(--color-bg-dark);
  border-radius: 14px;
  box-shadow: 0 2px 16px 0 rgba(34,40,80,0.06);
  padding: 2.2rem 1.5rem 1.5rem 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  min-height: 220px;
  border: 1.2px solid var(--color-border);
  transition: box-shadow 0.18s;
}
.review-card:hover {
  box-shadow: 0 6px 32px 0 rgba(58,71,184,0.13);
}
.review-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-accent);
  color: #fff;
  font-weight: 900;
  font-size: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.1rem;
  box-shadow: 0 2px 8px 0 rgba(58,71,184,0.10);
  letter-spacing: 0.01em;
}
.review-stars {
  color: #f7b500;
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
  letter-spacing: 0.08em;
}
.review-name {
  font-weight: 700;
  font-size: 1.08rem;
  margin-bottom: 0.5rem;
  color: var(--color-accent);
}
.review-text {
  color: #444;
  font-size: 1.05rem;
  text-align: center;
}

/* FAQ accordion */
.faq-list {
  max-width: 700px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}
.faq-list details {
  background: var(--color-bg-dark);
  border-radius: 10px;
  border: 1.2px solid var(--color-border);
  box-shadow: 0 2px 8px 0 rgba(34,40,80,0.04);
  padding: 0.7rem 1.2rem;
  transition: box-shadow 0.18s;
}
.faq-list details[open] {
  box-shadow: 0 6px 24px 0 rgba(58,71,184,0.10);
}
.faq-list summary {
  font-weight: 700;
  font-size: 1.08rem;
  color: var(--color-accent);
  cursor: pointer;
  outline: none;
  padding: 0.5rem 0;
  transition: color 0.18s;
  list-style: none;
}
.faq-list summary::-webkit-details-marker {
  display: none;
}
.faq-list details > div {
  color: #444;
  font-size: 1.02rem;
  margin-top: 0.7rem;
  padding-bottom: 0.5rem;
  line-height: 1.6;
  animation: fadeInFaq 0.4s;
}
@keyframes fadeInFaq {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: none; }
} 

/* Burger menu */
.burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 38px;
  height: 38px;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 120;
  margin-left: 1rem;
}
.burger span {
  display: block;
  width: 26px;
  height: 3px;
  background: var(--color-accent);
  margin: 4px 0;
  border-radius: 2px;
  transition: 0.25s;
}
@media (max-width: 600px) {
  nav { position: relative; }
  .nav-links { display: none !important; }
  .burger {
    display: flex;
    position: absolute;
    right: 1.2rem;
    top: 0.7rem;
    z-index: 120;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 38px;
    height: 38px;
    background: none;
    border: none;
    cursor: pointer;
    margin-left: 1rem;
  }
  .burger span {
    display: block;
    width: 26px;
    height: 3px;
    background: var(--color-accent);
    margin: 4px 0;
    border-radius: 2px;
    transition: 0.25s;
  }
  .mobile-menu-overlay {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(245,247,250,0.98);
    z-index: 9999;
    padding-top: 3.5rem;
    transition: opacity 0.25s, visibility 0.25s;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
  }
  .mobile-menu-overlay.open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }
  .mobile-nav-links {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    align-items: center;
  }
  .mobile-nav-links a {
    color: var(--color-accent);
    font-size: 1.25rem;
    font-weight: 700;
    text-decoration: none;
    letter-spacing: 0.01em;
    transition: color 0.18s;
  }
  .mobile-nav-links a:hover {
    color: var(--color-accent-hover);
  }
  .close-mobile-menu {
    position: absolute;
    top: 1.1rem;
    right: 1.2rem;
    background: none;
    border: none;
    font-size: 2.2rem;
    color: var(--color-accent);
    cursor: pointer;
    z-index: 130;
    line-height: 1;
  }
}