:root {
  --bg: #0a1628;
  --bg-gradient: radial-gradient(ellipse at top left, #12325c 0%, #0a1628 55%, #0a1628 100%);
  --fg: #eef2f7;
  --muted: #8ea0b8;
  --brand-blue: #1f6fe0;
  --brand-blue-bright: #2d86ff;
  --brand-green: #8ed93a;
  --brand-green-bright: #a8e850;
  --accent: var(--brand-blue-bright);
  --accent-gradient: linear-gradient(135deg, #2d86ff 0%, #8ed93a 100%);
  --panel: #112542;
  --border: #1f3a63;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  background-image: var(--bg-gradient);
  background-attachment: fixed;
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
html { scroll-padding-top: 88px; scroll-behavior: smooth; }
body { padding-top: 73px; overflow-x: hidden; }

body::before {
  content: "";
  position: fixed;
  inset: -20%;
  background:
    radial-gradient(circle at 20% 30%, rgba(45, 134, 255, 0.18), transparent 40%),
    radial-gradient(circle at 80% 70%, rgba(142, 217, 58, 0.12), transparent 45%);
  filter: blur(40px);
  z-index: -1;
  animation: drift 22s ease-in-out infinite alternate;
  pointer-events: none;
}

@keyframes drift {
  0%   { transform: translate3d(0, 0, 0) scale(1); }
  50%  { transform: translate3d(3%, -2%, 0) scale(1.05); }
  100% { transform: translate3d(-2%, 3%, 0) scale(1.02); }
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 32px;
  border-bottom: 1px solid var(--border);
  background: rgba(10, 22, 40, 0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--fg);
  font-weight: 700;
  letter-spacing: -0.01em;
}
.brand img { width: 32px; height: 32px; border-radius: 7px; box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3); }
.brand:hover { text-decoration: none; }

nav { display: flex; gap: 20px; align-items: center; }
nav a { color: var(--muted); font-size: 14px; }
nav a:hover { color: var(--fg); text-decoration: none; }
nav a.lang {
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: 6px;
  font-weight: 600;
  color: var(--fg);
}
nav a.lang:hover { border-color: var(--brand-blue-bright); }

main {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px;
}

/* --- hero --- */

.hero {
  min-height: calc(88vh - 73px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  padding: 40px 0 80px;
}

.hero h1 {
  font-size: clamp(36px, 6vw, 64px);
  line-height: 1.05;
  margin: 0 0 20px;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, #2d86ff 0%, #8ed93a 50%, #2d86ff 100%);
  background-size: 200% 200%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: gradientShift 8s ease-in-out infinite;
  max-width: 900px;
}

@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50%      { background-position: 100% 50%; }
}

.hero > p {
  color: var(--muted);
  font-size: clamp(17px, 1.6vw, 20px);
  max-width: 680px;
  margin: 0 0 28px;
}

.eyebrow {
  display: inline-block;
  color: var(--brand-green-bright);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0 0 20px;
  padding: 5px 12px;
  border: 1px solid rgba(142, 217, 58, 0.35);
  border-radius: 999px;
  background: rgba(142, 217, 58, 0.08);
  white-space: nowrap;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
}

.cta { margin-top: 8px; display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-block;
  background: var(--accent-gradient);
  color: #0a1628;
  padding: 12px 22px;
  border-radius: 8px;
  font-weight: 700;
  box-shadow: 0 4px 14px rgba(45, 134, 255, 0.25);
  transition: transform 0.12s, box-shadow 0.15s;
}
.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(142, 217, 58, 0.3);
}
.btn.ghost {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--fg);
  box-shadow: none;
}
.btn.ghost:hover {
  border-color: var(--brand-blue-bright);
  background: rgba(45, 134, 255, 0.08);
  transform: none;
  box-shadow: none;
}

/* --- sections --- */

section { padding: 120px 0; }

.section-intro {
  max-width: 720px;
  margin-bottom: 56px;
}
.section-intro .eyebrow { margin-bottom: 16px; }
.section-intro h2 {
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.1;
  letter-spacing: -0.025em;
  margin: 0;
  color: var(--fg);
}

h3 {
  font-size: 18px;
  margin: 0 0 10px;
  color: var(--fg);
  letter-spacing: -0.01em;
}

/* --- privacy: bento layout --- */

.privacy .stages {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 20px;
}
.privacy .card {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 32px;
  overflow: hidden;
  isolation: isolate;
}
.privacy .card .num {
  position: absolute;
  top: 22px;
  right: 28px;
  font-size: 13px;
  font-weight: 700;
  color: rgba(142, 217, 58, 0.55);
  letter-spacing: 0.12em;
}
.privacy .card h3 {
  font-size: clamp(22px, 2.4vw, 28px);
  margin: 0 0 12px;
  letter-spacing: -0.02em;
}
.privacy .card > p {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
  max-width: 520px;
  line-height: 1.55;
}

/* --- card 01: wide hero with mock app window --- */
.card-01 {
  grid-column: span 4;
  background:
    radial-gradient(circle at 80% 20%, rgba(45, 134, 255, 0.18), transparent 55%),
    var(--panel);
  padding-bottom: 200px;
}
.card-01 .mock {
  position: absolute;
  right: -40px;
  bottom: -30px;
  width: 380px;
  background: #0a1628;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
  transform: rotate(-4deg);
  overflow: hidden;
}
.card-01 .mock-bar {
  display: flex;
  gap: 6px;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.02);
}
.card-01 .mock-bar span {
  width: 10px; height: 10px; border-radius: 50%;
  background: #3a4a65;
}
.card-01 .mock-bar span:first-child { background: #ff5f57; }
.card-01 .mock-bar span:nth-child(2) { background: #febc2e; }
.card-01 .mock-bar span:nth-child(3) { background: #28c840; }
.card-01 .mock-body { padding: 16px; }
.card-01 .mock-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(142, 217, 58, 0.14);
  border: 1px solid rgba(142, 217, 58, 0.3);
  color: var(--brand-green-bright);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}
.card-01 .mock-chip::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--brand-green-bright);
  box-shadow: 0 0 8px var(--brand-green-bright);
  animation: pulse 1.8s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}
.card-01 .mock-line {
  height: 8px;
  border-radius: 4px;
  background: linear-gradient(90deg, #1f3a63, #12253f);
  margin-bottom: 8px;
}
.card-01 .mock-line.short { width: 65%; }
.card-01 .mock-line.tiny  { width: 40%; }

/* --- card 02: narrow, strike-through cloud --- */
.card-02 {
  grid-column: span 2;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background:
    radial-gradient(circle at 50% 20%, rgba(255, 95, 87, 0.1), transparent 60%),
    var(--panel);
}
.card-02 .big-cloud {
  position: relative;
  font-size: 96px;
  line-height: 1;
  margin: 8px 0 20px;
  text-align: center;
  filter: grayscale(0.4) opacity(0.85);
}
.card-02 .big-cloud::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 120%;
  height: 4px;
  background: linear-gradient(90deg, transparent, #ff6b6b, transparent);
  transform: translate(-50%, -50%) rotate(-20deg);
  border-radius: 2px;
  box-shadow: 0 0 12px rgba(255, 107, 107, 0.5);
}

/* --- card 03: file-path folder --- */
.card-03 {
  grid-column: span 3;
  background:
    radial-gradient(circle at 20% 80%, rgba(142, 217, 58, 0.12), transparent 55%),
    var(--panel);
}
.card-03 .folder {
  margin-top: 20px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 13px;
  color: var(--muted);
  background: rgba(10, 22, 40, 0.5);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.card-03 .folder::before {
  content: "📁";
  font-size: 18px;
}
.card-03 .folder b {
  color: var(--brand-green-bright);
  font-weight: 600;
}
.card-03 .folder-sub {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
  color: var(--muted);
  margin-top: 8px;
  padding-left: 4px;
  opacity: 0.7;
  white-space: pre;
  line-height: 1.7;
}

/* --- card 04: wide, giant $0 --- */
.card-04 {
  grid-column: span 3;
  background:
    radial-gradient(circle at 80% 80%, rgba(142, 217, 58, 0.14), transparent 55%),
    var(--panel);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: center;
}
.card-04 .content { min-width: 0; }
.card-04 .price {
  font-size: clamp(56px, 8vw, 96px);
  font-weight: 800;
  line-height: 0.9;
  letter-spacing: -0.04em;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  white-space: nowrap;
}
.card-04 .price small {
  display: block;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--muted);
  -webkit-text-fill-color: var(--muted);
  text-transform: uppercase;
  margin-top: 4px;
  text-align: right;
}

@media (max-width: 900px) {
  .privacy .stages { grid-template-columns: 1fr; }
  .card-01, .card-02, .card-03, .card-04 { grid-column: span 1; }
  .card-01 { padding-bottom: 32px; }
  .card-01 .mock { display: none; }
  .card-04 { grid-template-columns: 1fr; text-align: left; }
  .card-04 .price small { text-align: left; }
}

/* --- features: split into alternating rows --- */

.features .row {
  display: grid;
  grid-template-columns: 64px 1fr 1fr;
  gap: 28px 40px;
  align-items: center;
  padding: 28px 0;
  border-bottom: 1px solid var(--border);
}
.features .row:last-child { border-bottom: none; }
.features .row .icon {
  font-size: 36px;
  line-height: 1;
  text-align: center;
  filter: drop-shadow(0 3px 10px rgba(45, 134, 255, 0.25));
}
.features .row h3 {
  font-size: clamp(20px, 2.2vw, 26px);
  letter-spacing: -0.015em;
  margin: 0;
}
.features .row p { margin: 0; color: var(--muted); font-size: 16px; }

.features .coda {
  margin-top: 28px;
  color: var(--muted);
  font-size: 15px;
  max-width: 640px;
}

/* --- download --- */

#download {
  text-align: center;
  padding: 120px 0 160px;
}
#download h2 {
  font-size: clamp(28px, 4vw, 44px);
  letter-spacing: -0.025em;
  margin: 0 0 16px;
}
#download p {
  color: var(--muted);
  font-size: 17px;
  max-width: 560px;
  margin: 0 auto 20px;
}
#download .btn { padding: 14px 28px; font-size: 16px; }

/* --- reveals --- */

.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.9s cubic-bezier(0.2, 0.7, 0.2, 1);
  will-change: opacity, transform;
}
.reveal.from-left  { transform: translate3d(-60px, 0, 0); }
.reveal.from-right { transform: translate3d(60px, 0, 0); }
.reveal.from-up    { transform: translate3d(0, 40px, 0); }
.reveal.zoom       { transform: scale(0.94); }

.reveal.visible {
  opacity: 1;
  transform: translate3d(0, 0, 0) scale(1);
}
.reveal.delay-1 { transition-delay: 0.08s; }
.reveal.delay-2 { transition-delay: 0.16s; }
.reveal.delay-3 { transition-delay: 0.24s; }
.reveal.delay-4 { transition-delay: 0.32s; }

/* --- hero intro --- */

.hero .eyebrow,
.hero h1,
.hero > p,
.hero .cta {
  opacity: 0;
  transform: translateY(20px);
  animation: heroIn 0.9s cubic-bezier(0.2, 0.7, 0.2, 1) forwards;
}
.hero .eyebrow { animation-delay: 0.05s; }
.hero h1       { animation-delay: 0.18s; }
.hero > p      { animation-delay: 0.35s; }
.hero .cta     { animation-delay: 0.5s; }

@keyframes heroIn {
  to { opacity: 1; transform: translateY(0); }
}

/* --- scroll-linked (progressive enhancement, Chrome/Edge) --- */

@supports (animation-timeline: view()) {
  .scroll-fade {
    animation: scrollFadeIn linear both;
    animation-timeline: view();
    animation-range: entry 0% cover 28%;
  }
  .scroll-rise {
    animation: scrollRise linear both;
    animation-timeline: view();
    animation-range: entry 0% cover 35%;
  }
  @keyframes scrollFadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
  }
  @keyframes scrollRise {
    from { opacity: 0; transform: translateY(60px); }
    to   { opacity: 1; transform: translateY(0); }
  }
}

/* --- misc --- */

.muted { color: var(--muted); }
.small { font-size: 14px; }

footer {
  border-top: 1px solid var(--border);
  padding: 40px 32px;
  color: var(--muted);
  font-size: 14px;
  text-align: center;
}

/* --- responsive --- */

@media (max-width: 700px) {
  header { flex-direction: column; gap: 12px; padding: 16px; }
  body { padding-top: 116px; }
  html { scroll-padding-top: 128px; }
  section { padding: 80px 0; }
  .privacy .card { padding: 28px 24px 28px 32px; }
  .features .row { grid-template-columns: 48px 1fr; gap: 8px 16px; padding: 24px 0; }
  .features .row .icon { font-size: 28px; text-align: left; }
  .features .row h3 { grid-column: 2; }
  .features .row p { grid-column: 2; }
  .privacy .card .icon { font-size: 28px; top: 20px; right: 20px; }
  .hero { min-height: auto; padding: 40px 0 60px; }
  #download { padding: 80px 0 100px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  body::before { animation: none; }
  .reveal, .hero .eyebrow, .hero h1, .hero > p, .hero .cta {
    opacity: 1;
    transform: none;
    animation: none;
    transition: none;
  }
  .hero h1 { animation: none; }
}