@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;600;700&family=JetBrains+Mono:wght@400&display=swap');

:root {
  --surface: #131313;
  --surface-bright: #393939;
  --surface-container-lowest: #0e0e0e;
  --surface-container-low: #1b1b1b;
  --surface-container: #1f1f1f;
  --surface-container-high: #2a2a2a;
  --surface-container-highest: #353535;
  --on-surface: #e2e2e2;
  --on-surface-variant: #bacac6;
  --outline: #859490;
  --outline-variant: #3b4a47;
  --primary: #46efda;
  --on-primary: #003731;
  --secondary: #ffc07a;
  --tertiary: #5bf375;
  --background: #131313;
  --on-background: #e2e2e2;

  --radius-sm: 4px;
  --radius: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 40px;
  --space-xl: 64px;
  --space-gutter: 20px;
  --space-margin: 32px;

  --glass-bg: rgba(255, 255, 255, 0.06);
  --glass-border: 1px solid rgba(255, 255, 255, 0.12);
  --glass-blur: blur(24px);

  --glow-primary: 0 0 15px rgba(70, 239, 218, 0.18);
  --glow-primary-btn: 0 0 10px rgba(70, 239, 218, 0.45);

  --transition: 200ms ease;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: #000000;
  color: var(--on-background);
  font-family: 'Inter', sans-serif;
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
}

/* ─── Layout ──────────────────────────────────────────────── */

.container {
  width: 100%;
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: var(--space-margin);
}

/* ─── Typography helpers ─────────────────────────────────── */

.display-lg {
  font-family: 'Inter', sans-serif;
  font-size: clamp(28px, 5vw, 56px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.headline-md {
  font-family: 'Inter', sans-serif;
  font-size: 24px;
  font-weight: 600;
  line-height: 1.3;
}

.label-caps {
  font-family: 'Inter', sans-serif;
  font-size: 12px;
  font-weight: 700;
  line-height: 1.0;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--on-surface-variant);
}

.mono-data {
  font-family: 'JetBrains Mono', monospace;
  font-size: 14px;
  font-weight: 400;
  line-height: 1.4;
}

/* ─── Glass surface ──────────────────────────────────────── */

.glass {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
}

/* ─── Buttons ────────────────────────────────────────────── */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 14px 32px;
  border-radius: var(--radius-full);
  font-family: 'Inter', sans-serif;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: box-shadow var(--transition), transform var(--transition), background var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary);
  color: var(--on-primary);
  box-shadow: var(--glow-primary-btn);
}

.btn-primary:hover {
  box-shadow: 0 0 20px rgba(70, 239, 218, 0.65);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--primary);
}

.btn-ghost:hover {
  background: rgba(70, 239, 218, 0.08);
  box-shadow: var(--glow-primary-btn);
  transform: translateY(-1px);
}

/* ─── Language Switcher ──────────────────────────────────── */

.lang-switcher {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-full);
  border: 1px solid var(--outline-variant);
  background: var(--glass-bg);
  cursor: pointer;
  font-size: 22px;
  line-height: 1;
  text-decoration: none;
  position: relative;
  overflow: hidden;
  flex-shrink: 0;
  transition: border-color var(--transition), background var(--transition);
}

.lang-switcher:hover {
  border-color: var(--primary);
  background: rgba(70, 239, 218, 0.08);
}

.lang-flag-current,
.lang-flag-hover {
  position: absolute;
  transition: opacity 200ms ease, transform 200ms ease;
  line-height: 1;
}

.lang-flag-hover {
  opacity: 0;
  transform: scale(0.6);
}

.lang-switcher:hover .lang-flag-current {
  opacity: 0;
  transform: scale(0.6);
}

.lang-switcher:hover .lang-flag-hover {
  opacity: 1;
  transform: scale(1);
}

/* ─── Navbar ─────────────────────────────────────────────── */

.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  padding-block: var(--space-sm);
  transition: background var(--transition), backdrop-filter var(--transition), border-color var(--transition);
  border-bottom: 1px solid transparent;
}

.navbar.scrolled {
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom-color: rgba(255, 255, 255, 0.08);
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  flex-shrink: 0;
}

.nav-logo img {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
}

.nav-logo-text {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--on-surface);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  list-style: none;
}

.nav-links a {
  font-size: 15px;
  font-weight: 500;
  color: var(--on-surface-variant);
  transition: color var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  border-radius: var(--radius-full);
  transition: width var(--transition);
}

.nav-links a:hover {
  color: var(--on-surface);
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-download {
  font-size: 14px;
  padding: 10px 22px;
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}

.nav-hamburger:hover {
  background: var(--glass-bg);
}

.nav-hamburger span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--on-surface);
  border-radius: var(--radius-full);
  transition: transform var(--transition), opacity var(--transition);
}

.nav-hamburger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-hamburger.open span:nth-child(2) {
  opacity: 0;
}

.nav-hamburger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav-mobile-menu {
  display: none;
  flex-direction: column;
  gap: 0;
  background: rgba(0, 0, 0, 0.92);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: var(--space-sm) 0;
}

.nav-mobile-menu.open {
  display: flex;
}

.nav-mobile-menu a {
  display: block;
  padding: var(--space-sm) var(--space-margin);
  font-size: 16px;
  font-weight: 500;
  color: var(--on-surface-variant);
  transition: color var(--transition), background var(--transition);
}

.nav-mobile-menu a:hover {
  color: var(--on-surface);
  background: var(--glass-bg);
}

.nav-mobile-menu .btn {
  margin: var(--space-sm) var(--space-margin) var(--space-xs);
  justify-content: center;
}

/* ─── Hero brand & tagline ───────────────────────────────── */

.hero-app-name {
  font-size: clamp(52px, 9vw, 88px);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1;
  background: linear-gradient(135deg, #ffffff 0%, var(--primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-tagline {
  font-size: clamp(18px, 2.5vw, 26px);
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 1.3;
  background: linear-gradient(90deg, #ffffff 0%, var(--secondary) 50%, #fa9b00 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ─── App Store Badge ────────────────────────────────────── */

.appstore-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 11px 22px;
  background: #000;
  border: 1.5px solid rgba(255, 255, 255, 0.65);
  border-radius: 10px;
  color: #fff;
  cursor: default;
  pointer-events: none;
  flex-shrink: 0;
}

.appstore-badge-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.appstore-badge-small {
  font-family: 'Inter', sans-serif;
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 0.01em;
  opacity: 0.85;
}

.appstore-badge-large {
  font-family: 'Inter', sans-serif;
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.appstore-badge-nav {
  padding: 7px 14px;
  border-radius: 8px;
  gap: 7px;
}

.appstore-badge-nav .appstore-badge-large {
  font-size: 14px;
}

.appstore-badge-nav .appstore-badge-small {
  font-size: 9px;
}

/* ─── Hero Section ───────────────────────────────────────── */

.hero {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
  padding-block: var(--space-xl) var(--space-xl);
  overflow: hidden;
}

.hero-glow-left {
  position: absolute;
  top: 10%;
  left: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(ellipse at center, rgba(70, 239, 218, 0.07) 0%, transparent 65%);
  pointer-events: none;
}

.hero-glow-right {
  position: absolute;
  bottom: 5%;
  right: -150px;
  width: 500px;
  height: 500px;
  background: radial-gradient(ellipse at center, rgba(91, 243, 117, 0.05) 0%, transparent 65%);
  pointer-events: none;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: var(--space-xl);
  position: relative;
  z-index: 1;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  border: 1px solid var(--outline-variant);
  background: rgba(70, 239, 218, 0.06);
  width: fit-content;
}

.hero-badge-dot {
  width: 7px;
  height: 7px;
  background: var(--tertiary);
  border-radius: var(--radius-full);
  box-shadow: 0 0 6px rgba(91, 243, 117, 0.7);
  flex-shrink: 0;
}

.hero-headline {
  background: linear-gradient(135deg, #ffffff 0%, var(--on-surface) 50%, var(--primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subline {
  font-size: 18px;
  color: var(--on-surface-variant);
  max-width: 480px;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  align-items: center;
  margin-top: var(--space-xs);
}

.hero-platform-note {
  font-size: 13px;
  color: var(--outline);
  display: flex;
  align-items: center;
  gap: 6px;
}

.hero-platform-note svg {
  flex-shrink: 0;
}

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

.hero-icon-wrapper {
  position: relative;
  width: 260px;
  height: 260px;
}

.hero-icon-glow {
  position: absolute;
  inset: -30px;
  background: radial-gradient(ellipse at center, rgba(70, 239, 218, 0.15) 0%, transparent 65%);
  border-radius: var(--radius-full);
  animation: pulseGlow 3s ease-in-out infinite;
}

.hero-icon-wrapper img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: var(--radius-xl);
  filter: drop-shadow(0 0 40px rgba(70, 239, 218, 0.2));
}

@keyframes pulseGlow {
  0%, 100% { opacity: 0.6; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.05); }
}

/* ─── Section shared ─────────────────────────────────────── */

section {
  padding-block: var(--space-xl);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-lg);
}

.section-header .label-caps {
  margin-bottom: var(--space-xs);
  display: block;
}

.section-header h2 {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--on-surface);
}

.section-header p {
  margin-top: var(--space-sm);
  color: var(--on-surface-variant);
  max-width: 520px;
  margin-inline: auto;
  font-size: 17px;
}

/* ─── Features Section ───────────────────────────────────── */

#features {
  background: linear-gradient(180deg, #000000 0%, var(--surface-container-lowest) 100%);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.feature-card {
  border-radius: var(--radius-xl);
  padding: var(--space-lg) var(--space-md);
  transition: box-shadow var(--transition), transform var(--transition);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.feature-card:hover {
  box-shadow: var(--glow-primary);
  transform: translateY(-3px);
}

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-lg);
  background: rgba(70, 239, 218, 0.1);
  border: 1px solid rgba(70, 239, 218, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  flex-shrink: 0;
}

.feature-card h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--on-surface);
  line-height: 1.3;
}

.feature-card p {
  color: var(--on-surface-variant);
  font-size: 15px;
  line-height: 1.6;
  flex: 1;
}

.feature-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: var(--space-xs);
}

.tag {
  font-size: 12px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  background: rgba(70, 239, 218, 0.08);
  color: var(--primary);
  border: 1px solid rgba(70, 239, 218, 0.2);
}

.tag-secondary {
  background: rgba(255, 192, 122, 0.08);
  color: var(--secondary);
  border-color: rgba(255, 192, 122, 0.2);
}

.tag-tertiary {
  background: rgba(91, 243, 117, 0.08);
  color: var(--tertiary);
  border-color: rgba(91, 243, 117, 0.2);
}

/* ─── Screenshots Section ────────────────────────────────── */

#screenshots {
  background: #000000;
}

.screenshots-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
  align-items: start;
}

.screenshot-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  position: relative;
  z-index: 1;
  transition: transform 300ms ease, z-index 0s 300ms;
}

.screenshot-item:hover {
  transform: scale(2);
  z-index: 100;
  transition: transform 300ms ease, z-index 0s;
}

.screenshot-frame {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 0 30px rgba(70, 239, 218, 0.08), 0 8px 32px rgba(0, 0, 0, 0.5);
  transition: box-shadow var(--transition), transform var(--transition);
  background: var(--surface-container-lowest);
}

.screenshot-frame::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-xl);
  box-shadow: inset 0 0 0 18px var(--surface-container-lowest);
  pointer-events: none;
  z-index: 1;
}

.screenshot-frame:hover {
  box-shadow: 0 0 40px rgba(70, 239, 218, 0.18), 0 16px 48px rgba(0, 0, 0, 0.6);
  transform: translateY(-4px);
}

.screenshot-frame img {
  width: 100%;
  height: auto;
  display: block;
}

.screenshot-caption {
  font-size: 13px;
  color: var(--on-surface-variant);
  text-align: center;
  padding-inline: var(--space-xs);
  line-height: 1.4;
}

.screenshot-caption strong {
  display: block;
  color: var(--on-surface);
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 2px;
}

/* ─── Tech Specs Section ─────────────────────────────────── */

#specs {
  background: linear-gradient(180deg, var(--surface-container-lowest) 0%, #000000 100%);
  padding-block: var(--space-lg);
}

.specs-card {
  border-radius: var(--radius-xl);
  padding: var(--space-lg);
  max-width: 860px;
  margin-inline: auto;
}

.specs-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
}

.specs-header h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--on-surface);
}

.badge-platform {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: var(--radius-full);
  background: rgba(91, 243, 117, 0.1);
  border: 1px solid rgba(91, 243, 117, 0.3);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--tertiary);
}

.badge-platform-dot {
  width: 6px;
  height: 6px;
  background: var(--tertiary);
  border-radius: var(--radius-full);
}

.specs-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.spec-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: var(--space-sm);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.spec-value {
  font-family: 'JetBrains Mono', monospace;
  font-size: 15px;
  color: var(--on-surface);
  line-height: 1.4;
}

.spec-no-sub {
  font-size: 14px;
  color: var(--on-surface-variant);
  font-style: italic;
  margin-top: 2px;
}

/* ─── Download / CTA Section ─────────────────────────────── */

#download {
  padding-block: var(--space-xl);
  position: relative;
  overflow: hidden;
}

.download-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 700px;
  height: 400px;
  background: radial-gradient(ellipse at center, rgba(70, 239, 218, 0.06) 0%, transparent 65%);
  pointer-events: none;
}

.download-card {
  border-radius: var(--radius-xl);
  padding: var(--space-xl) var(--space-lg);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  position: relative;
  z-index: 1;
  max-width: 700px;
  margin-inline: auto;
}

.download-card h2 {
  font-size: clamp(24px, 4vw, 38px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--on-surface);
}

.download-card h2 span {
  color: var(--primary);
}

.download-card p {
  color: var(--on-surface-variant);
  font-size: 15px;
  line-height: 1.6;
  max-width: 460px;
}

.download-actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
}

.download-note {
  font-size: 13px;
  color: var(--outline);
}

/* ─── Footer ─────────────────────────────────────────────── */

footer {
  border-top: 1px solid rgba(255, 255, 255, 0.07);
  padding-block: var(--space-lg);
  background: var(--surface-container-lowest);
}

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

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.footer-logo img {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-sm);
}

.footer-logo-text {
  font-size: 16px;
  font-weight: 700;
  color: var(--on-surface);
}

.footer-copy {
  font-size: 13px;
  color: var(--outline);
}

.footer-links {
  display: flex;
  gap: var(--space-md);
  list-style: none;
}

.footer-links a {
  font-size: 13px;
  color: var(--on-surface-variant);
  transition: color var(--transition);
}

.footer-links a:hover {
  color: var(--primary);
}

/* ─── Scroll-reveal ──────────────────────────────────────── */

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ─── Responsive ─────────────────────────────────────────── */

@media (max-width: 900px) {
  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-content {
    align-items: center;
  }

  .hero-subline {
    max-width: 100%;
  }

  .hero-visual {
    order: -1;
  }

  .hero-icon-wrapper {
    width: 180px;
    height: 180px;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .screenshots-grid {
    grid-template-columns: 1fr;
    max-width: 560px;
    margin-inline: auto;
  }

  .specs-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  .nav-links,
  .nav-download {
    display: none;
  }

  .nav-hamburger {
    display: flex;
  }

  .container {
    padding-inline: var(--space-sm);
  }

  .hero {
    min-height: auto;
    padding-block: var(--space-lg) var(--space-lg);
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
    justify-content: center;
  }

  .specs-card {
    padding: var(--space-md);
  }

  .download-card {
    padding: var(--space-lg) var(--space-sm);
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
    gap: var(--space-sm);
  }

  .footer-links {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  :root {
    --space-xl: 48px;
    --space-lg: 32px;
  }
}