/* ============================================
   Smart AI Renamer – Marketing Website
   Design system: purple gradient, glass-morphism
   ============================================ */

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

:root {
  --bg-start: #e0eaf6;
  --bg-mid: #b8d0ec;
  --bg-end: #d4e3f5;
  --accent-start: #6366f1;
  --accent-end: #8b5cf6;
  --dark: #1a1a2e;
  --medium: #2d2d44;
  --light-text: #4a4a6a;
  --glass-bg: rgba(255, 255, 255, 0.85);
  --glass-border: rgba(255, 255, 255, 0.6);
  --glass-blur: 20px;
  --radius: 28px;
  --radius-sm: 16px;
  --radius-xs: 10px;
  --shadow: 0 8px 32px rgba(99, 102, 241, 0.10);
  --shadow-lg: 0 16px 48px rgba(99, 102, 241, 0.14);
  --max-w: 1200px;
  --nav-h: 72px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 16px); }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--dark);
  line-height: 1.6;
  background: linear-gradient(160deg, var(--bg-start), var(--bg-mid), var(--bg-end));
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: "Avenir Next", "Avenir", -apple-system, sans-serif;
  font-weight: 700;
  line-height: 1.2;
}

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

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

.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }

/* --- Glass Card --- */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 14px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
  color: #fff;
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.3);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(99, 102, 241, 0.4);
  color: #fff;
}

.btn-secondary {
  background: var(--glass-bg);
  color: var(--dark);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(10px);
}
.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.95);
  transform: translateY(-1px);
  color: var(--dark);
}

.btn-sm { padding: 8px 18px; font-size: 0.875rem; border-radius: 10px; }

/* Mac App Store badge styling */
.appstore-badge {
  display: inline-block;
  transition: transform var(--transition);
}
.appstore-badge:hover { transform: translateY(-2px); }
.appstore-badge img { height: 48px; width: auto; }

/* ============================================
   NAVBAR
   ============================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-h);
  z-index: 100;
  transition: background var(--transition), box-shadow var(--transition);
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 24px rgba(99, 102, 241, 0.08);
}

.navbar .container {
  display: flex;
  align-items: center;
  height: 100%;
  gap: 32px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: "Avenir Next", "Avenir", sans-serif;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--dark);
  flex-shrink: 0;
}
.nav-logo img { height: 44px; width: 44px; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
  margin-left: auto;
}
.nav-links a {
  color: var(--medium);
  font-size: 0.925rem;
  font-weight: 500;
  padding: 6px 2px;
  position: relative;
}
.nav-links a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-start), var(--accent-end));
  transition: width var(--transition);
  border-radius: 1px;
}
.nav-links a:hover::after { width: 100%; }

.lang-toggle {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 12px;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--medium);
  background: rgba(255, 255, 255, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.6);
}
.lang-toggle:hover { background: rgba(255, 255, 255, 0.8); color: var(--dark); }

.nav-cta { flex-shrink: 0; }

/* Mobile menu button */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  margin-left: auto;
}
.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--dark);
  margin: 6px 0;
  transition: all var(--transition);
  border-radius: 2px;
}
.menu-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 6px); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -6px); }

/* ============================================
   HERO
   ============================================ */
.hero {
  padding: calc(var(--nav-h) + 64px) 0 80px;
  text-align: center;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  color: var(--dark);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.hero h1 .gradient-text {
  background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero .subtitle {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--light-text);
  max-width: 640px;
  margin: 0 auto 32px;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.hero-screenshot {
  max-width: 900px;
  margin: 0 auto;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.hero-screenshot img { width: 100%; }

/* ============================================
   SECTIONS (shared)
   ============================================ */
section { padding: 80px 0; }

.section-header {
  text-align: center;
  margin-bottom: 48px;
}
.section-header h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  margin-bottom: 12px;
}
.section-header p {
  color: var(--light-text);
  font-size: 1.1rem;
  max-width: 560px;
  margin: 0 auto;
}

/* ============================================
   FEATURES – 2x2 grid
   ============================================ */
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.feature-card {
  padding: 36px 32px;
  transition: transform var(--transition), box-shadow var(--transition);
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 16px;
  color: #fff;
}

.feature-card h3 {
  font-size: 1.2rem;
  margin-bottom: 8px;
}
.feature-card p {
  color: var(--light-text);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* ============================================
   HOW IT WORKS – 3 columns
   ============================================ */
.how-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.how-card {
  padding: 32px 28px;
  text-align: center;
}

.how-badge {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
  color: #fff;
  font-family: "Avenir Next", sans-serif;
  font-weight: 700;
  font-size: 1.3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}

.how-icon {
  font-size: 3.5rem;
  line-height: 1;
  margin-bottom: 12px;
}

.how-card h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}
.how-card p {
  color: var(--light-text);
  font-size: 0.925rem;
}

/* ============================================
   SCREENSHOTS CAROUSEL
   ============================================ */
.screenshots {
  overflow: hidden;
}

.carousel-wrapper {
  position: relative;
  max-width: 100%;
}

.carousel-track {
  display: flex;
  gap: 24px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  padding: 16px 0 24px;
}
.carousel-track::-webkit-scrollbar { display: none; }

.carousel-slide {
  flex: 0 0 auto;
  width: min(88vw, 960px);
  scroll-snap-align: center;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform var(--transition);
}
.carousel-slide:hover { transform: scale(1.02); }
.carousel-slide img { width: 100%; display: block; }

.carousel-nav {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 8px;
}

.carousel-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: none;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--dark);
  transition: all var(--transition);
}
.carousel-btn:hover {
  background: #fff;
  transform: scale(1.1);
}

.carousel-dots {
  display: flex;
  align-items: center;
  gap: 8px;
}
.carousel-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(99, 102, 241, 0.25);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  padding: 0;
}
.carousel-dot.active {
  background: var(--accent-start);
  width: 28px;
  border-radius: 5px;
}

/* ============================================
   USE CASES
   ============================================ */
.usecases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
}

.usecase-card {
  padding: 28px 24px;
  text-align: center;
  transition: transform var(--transition);
}
.usecase-card:hover { transform: translateY(-3px); }

.usecase-icon {
  font-size: 2rem;
  margin-bottom: 12px;
}
.usecase-card h3 {
  font-size: 1.05rem;
  margin-bottom: 6px;
}
.usecase-card p {
  color: var(--light-text);
  font-size: 0.875rem;
}

/* ============================================
   PRICING
   ============================================ */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: start;
}

.pricing-card {
  padding: 36px 28px;
  text-align: center;
  position: relative;
  transition: transform var(--transition);
}
.pricing-card:hover { transform: translateY(-4px); }

.pricing-card.featured {
  border: 2px solid var(--accent-start);
  transform: scale(1.04);
}
.pricing-card.featured:hover { transform: scale(1.06); }

.pricing-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.pricing-card h3 {
  font-size: 1.3rem;
  margin-bottom: 8px;
}

.pricing-price {
  font-size: 2.4rem;
  font-family: "Avenir Next", sans-serif;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 4px;
}
.pricing-price span {
  font-size: 1rem;
  font-weight: 400;
  color: var(--light-text);
}

.pricing-renames {
  color: var(--light-text);
  font-size: 0.95rem;
  margin-bottom: 20px;
}

.pricing-features {
  list-style: none;
  text-align: left;
  margin-bottom: 24px;
}
.pricing-features li {
  padding: 6px 0;
  font-size: 0.925rem;
  color: var(--medium);
  display: flex;
  align-items: center;
  gap: 8px;
}
.pricing-features li::before {
  content: "\2713";
  color: var(--accent-start);
  font-weight: 700;
  flex-shrink: 0;
}

/* ============================================
   DOWNLOAD CTA
   ============================================ */
.download-cta {
  text-align: center;
  padding: 80px 0 64px;
}

.download-cta .glass {
  padding: 56px 40px;
  max-width: 640px;
  margin: 0 auto;
}

.download-icon {
  width: 96px;
  height: 96px;
  border-radius: 22px;
  margin: 0 auto 20px;
  box-shadow: var(--shadow);
}

.download-cta h2 {
  font-size: 1.8rem;
  margin-bottom: 12px;
}
.download-cta p {
  color: var(--light-text);
  margin-bottom: 24px;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  padding: 48px 0 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.4);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 32px;
}

.footer-brand p {
  color: var(--light-text);
  font-size: 0.9rem;
  margin-top: 8px;
  max-width: 300px;
}

.footer h4 {
  font-size: 0.95rem;
  margin-bottom: 12px;
  color: var(--dark);
}

.footer-links {
  list-style: none;
}
.footer-links li { margin-bottom: 8px; }
.footer-links a {
  color: var(--light-text);
  font-size: 0.9rem;
}
.footer-links a:hover { color: var(--accent-start); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.3);
  font-size: 0.825rem;
  color: var(--light-text);
  flex-wrap: wrap;
  gap: 12px;
}

.impressum {
  font-size: 0.825rem;
  color: var(--light-text);
  text-align: right;
}

/* ============================================
   LANGUAGE BANNER
   ============================================ */
.lang-banner {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 90;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.925rem;
  animation: slideUp 0.4s ease;
}
.lang-banner.hidden { display: none; }
.lang-banner-close {
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  color: var(--light-text);
  padding: 4px;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateX(-50%) translateY(20px); }
  to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* ============================================
   PRIVACY & SUPPORT – Content Pages
   ============================================ */
.page-content {
  padding: calc(var(--nav-h) + 48px) 0 80px;
}

.content-card {
  max-width: 800px;
  margin: 0 auto;
  padding: 48px 56px;
}

.content-card h1 {
  font-size: 2rem;
  margin-bottom: 8px;
}

.content-card .last-updated {
  color: var(--light-text);
  font-size: 0.9rem;
  margin-bottom: 32px;
}

.content-card h2 {
  font-size: 1.35rem;
  margin-top: 36px;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid rgba(99, 102, 241, 0.15);
}

.content-card h3 {
  font-size: 1.1rem;
  margin-top: 24px;
  margin-bottom: 8px;
}

.content-card p, .content-card li {
  color: var(--medium);
  font-size: 0.95rem;
  line-height: 1.7;
}

.content-card ul {
  padding-left: 24px;
  margin: 12px 0;
}
.content-card li { margin-bottom: 6px; }

.content-card a {
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* Data table */
.data-table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0 24px;
  font-size: 0.9rem;
}
.data-table th, .data-table td {
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid rgba(99, 102, 241, 0.1);
}
.data-table th {
  font-weight: 600;
  color: var(--dark);
  background: rgba(99, 102, 241, 0.05);
}
.data-table td { color: var(--medium); }

/* Support page */
.faq-item {
  margin-bottom: 24px;
}
.faq-item h3 {
  border: none;
  margin-top: 0;
  color: var(--dark);
}

.contact-card {
  margin-top: 36px;
  padding: 32px;
  background: rgba(99, 102, 241, 0.05);
  border-radius: var(--radius-sm);
}
.contact-card h2 { border: none; margin-top: 0; }
.contact-card p { margin-bottom: 16px; }

.contact-info {
  font-size: 0.9rem;
  color: var(--light-text);
  margin-top: 20px;
}
.contact-info p { margin-bottom: 4px; }

/* ============================================
   RESPONSIVE
   ============================================ */

/* Tablet */
@media (max-width: 900px) {
  .features-grid { grid-template-columns: 1fr; }
  .how-grid { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; max-width: 400px; margin: 0 auto; }
  .pricing-card.featured { transform: none; }
  .pricing-card.featured:hover { transform: translateY(-4px); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

/* Mobile */
@media (max-width: 640px) {
  :root { --nav-h: 64px; }

  .nav-links {
    display: none;
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    padding: 16px 24px 24px;
    gap: 4px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 0; font-size: 1rem; }

  .menu-toggle { display: block; }
  .nav-cta { display: none; }

  .hero { padding-top: calc(var(--nav-h) + 32px); padding-bottom: 48px; }
  .hero h1 { font-size: 1.8rem; }

  section { padding: 48px 0; }
  .section-header { margin-bottom: 32px; }

  .carousel-slide { width: 85vw; }

  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .impressum { text-align: center; }

  .content-card { padding: 28px 24px; }
  .content-card h1 { font-size: 1.6rem; }

  .data-table { font-size: 0.8rem; }
  .data-table th, .data-table td { padding: 8px 10px; }
}