:root {
  --bg: #fbf9ff;
  --surface: #ffffff;
  --text: #1c1340;
  --muted: #6b6588;
  --line: rgba(124, 92, 255, 0.14);

  --violet: #7c5cff;
  --violet-2: #a78bfa;
  --pink: #ff5fa2;
  --orange: #ff9a5a;
  --cyan: #2ad2e0;
  --green: #34d399;

  --radius: 22px;
  --max: 1100px;
  --shadow: 0 18px 50px rgba(124, 92, 255, 0.16);
  --shadow-sm: 0 8px 24px rgba(124, 92, 255, 0.1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Plus Jakarta Sans", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
  line-height: 1.55;
}

a { color: inherit; }

/* ================= Animated background ================= */
.bg { position: fixed; inset: 0; z-index: -1; overflow: hidden; }
.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  opacity: 0.5;
  will-change: transform;
}
.blob-a {
  width: 36vmax; height: 36vmax;
  background: radial-gradient(circle, var(--violet-2), transparent 65%);
  top: -10vmax; left: -8vmax;
  animation: float-a 18s ease-in-out infinite;
}
.blob-b {
  width: 32vmax; height: 32vmax;
  background: radial-gradient(circle, var(--pink), transparent 65%);
  top: -6vmax; right: -8vmax;
  animation: float-b 22s ease-in-out infinite;
}
.blob-c {
  width: 30vmax; height: 30vmax;
  background: radial-gradient(circle, var(--cyan), transparent 65%);
  bottom: -12vmax; left: 20%;
  animation: float-c 26s ease-in-out infinite;
}
.blob-d {
  width: 26vmax; height: 26vmax;
  background: radial-gradient(circle, var(--orange), transparent 65%);
  bottom: -8vmax; right: 15%;
  opacity: 0.4;
  animation: float-a 24s ease-in-out infinite reverse;
}

@keyframes float-a { 0%,100% { transform: translate(0,0) scale(1); } 50% { transform: translate(6vmax,5vmax) scale(1.1); } }
@keyframes float-b { 0%,100% { transform: translate(0,0) scale(1); } 50% { transform: translate(-5vmax,4vmax) scale(1.12); } }
@keyframes float-c { 0%,100% { transform: translate(0,0) scale(1); } 50% { transform: translate(5vmax,-5vmax) scale(0.92); } }

/* ================= Shared ================= */
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow-sm);
}

.grad {
  background: linear-gradient(100deg, var(--violet), var(--pink), var(--orange));
  background-size: 200% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: shine 6s linear infinite;
}
@keyframes shine { to { background-position: 200% 0; } }

.section { max-width: var(--max); margin: 0 auto; padding: 70px 22px; text-align: center; }
.kicker {
  display: inline-block;
  font-size: 13px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--violet);
  background: rgba(124, 92, 255, 0.1);
  padding: 5px 12px; border-radius: 999px;
  margin: 0 0 14px;
}
.section-title { font-size: clamp(26px, 4.2vw, 38px); font-weight: 800; margin: 0 0 44px; letter-spacing: -0.02em; }

/* ================= Navbar ================= */
.nav {
  position: sticky; top: 0; z-index: 30;
  display: flex; align-items: center; justify-content: space-between;
  max-width: var(--max); margin: 0 auto; padding: 16px 22px;
  backdrop-filter: blur(8px);
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 20px; text-decoration: none; letter-spacing: -0.02em; }
.brand-mark {
  display: grid; place-items: center;
  width: 36px; height: 36px; border-radius: 11px;
  background: linear-gradient(135deg, var(--violet), var(--pink));
  color: #fff;
  box-shadow: 0 8px 20px rgba(255, 95, 162, 0.4);
}
.brand-mark svg { width: 21px; height: 21px; }
.nav-links { display: flex; align-items: center; gap: 28px; font-size: 14.5px; font-weight: 500; }
.nav-links a { color: var(--muted); text-decoration: none; transition: color 0.2s; }
.nav-links a:hover { color: var(--text); }
.nav-cta {
  color: #fff !important;
  background: linear-gradient(135deg, var(--violet), var(--pink));
  padding: 10px 18px; border-radius: 999px;
  box-shadow: 0 8px 20px rgba(124, 92, 255, 0.35);
  transition: transform 0.15s, box-shadow 0.25s;
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 12px 26px rgba(124, 92, 255, 0.45); }

/* ================= Hero ================= */
.hero {
  max-width: 780px; margin: 0 auto;
  padding: 56px 22px 36px; text-align: center;
  animation: rise 0.8s cubic-bezier(0.16, 1, 0.3, 1) both;
}
@keyframes rise { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: translateY(0); } }

.pill {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13.5px; font-weight: 600; color: var(--violet);
  background: rgba(124, 92, 255, 0.1);
  border: 1px solid var(--line);
  padding: 8px 16px; border-radius: 999px;
  margin-bottom: 24px;
}
.spark { animation: spin 4s linear infinite; display: inline-block; }
@keyframes spin { to { transform: rotate(360deg); } }

.hero-title { font-size: clamp(36px, 7.5vw, 62px); font-weight: 800; line-height: 1.05; letter-spacing: -0.03em; margin: 0 0 20px; }
.hero-sub { font-size: clamp(15px, 2.4vw, 18px); color: var(--muted); max-width: 560px; margin: 0 auto 34px; }

/* ---- Downloader ---- */
.downloader {
  display: flex; gap: 12px;
  padding: 14px;
  border-radius: var(--radius);
  max-width: 640px; margin: 0 auto;
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}
.field { position: relative; flex: 1; display: flex; align-items: center; min-width: 0; }
.field-ic { position: absolute; left: 16px; width: 18px; height: 18px; color: var(--violet); pointer-events: none; }
.field input {
  width: 100%;
  background: #f6f3ff;
  border: 1px solid transparent;
  color: var(--text);
  font-family: inherit; font-size: 15px;
  padding: 15px 80px 15px 44px;
  border-radius: 14px; outline: none;
  transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}
.field input:focus { background: #fff; border-color: var(--violet); box-shadow: 0 0 0 4px rgba(124, 92, 255, 0.16); }
.field input::placeholder { color: #a7a0c4; }

.paste {
  position: absolute; right: 8px;
  border: 0; cursor: pointer;
  background: rgba(124, 92, 255, 0.12);
  color: var(--violet);
  font-family: inherit; font-size: 13px; font-weight: 700;
  padding: 8px 14px; border-radius: 10px;
  transition: background 0.2s, transform 0.1s;
}
.paste:hover { background: rgba(124, 92, 255, 0.2); }
.paste:active { transform: scale(0.93); }

/* ---- Buttons ---- */
.btn {
  position: relative;
  border: 0; cursor: pointer;
  background: linear-gradient(135deg, var(--violet), var(--pink), var(--orange));
  background-size: 200% 200%;
  color: #fff;
  font-family: inherit; font-weight: 700; font-size: 15.5px;
  padding: 15px 28px; border-radius: 14px;
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  white-space: nowrap; text-decoration: none;
  overflow: hidden;
  box-shadow: 0 10px 26px rgba(255, 95, 162, 0.35);
  transition: transform 0.12s, box-shadow 0.25s;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 16px 34px rgba(124, 92, 255, 0.4); animation: gradShift 3s ease infinite; }
.btn:active { transform: translateY(0) scale(0.98); }
.btn svg { width: 18px; height: 18px; }
@keyframes gradShift { 0%,100% { background-position: 0% 50%; } 50% { background-position: 100% 50%; } }

.btn::after {
  content: ""; position: absolute; top: 0; left: -120%;
  width: 55%; height: 100%;
  background: linear-gradient(120deg, transparent, rgba(255, 255, 255, 0.5), transparent);
  transform: skewX(-20deg);
}
.btn:hover::after { animation: sweep 0.9s ease; }
@keyframes sweep { to { left: 130%; } }

button:disabled { opacity: 0.8; cursor: progress; }

.spinner {
  width: 16px; height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.5);
  border-top-color: #fff; border-radius: 50%;
  display: none; animation: rot 0.6s linear infinite;
}
.loading .btn-label { opacity: 0.6; }
.loading .spinner { display: inline-block; }
@keyframes rot { to { transform: rotate(360deg); } }

/* ---- Status ---- */
.status { text-align: center; margin: 16px auto 0; font-size: 14px; min-height: 18px; max-width: 640px; font-weight: 500; }
.status.err { color: #e5484d; }
.status.ok { color: #16a34a; }

/* ---- Result ---- */
.result {
  max-width: 640px; margin: 24px auto 0;
  padding: 16px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--line);
  box-shadow: var(--shadow);
  display: grid; grid-template-columns: 150px 1fr; gap: 18px; align-items: center;
  text-align: left;
}
.result[hidden] { display: none; }
.result:not([hidden]) { animation: pop 0.5s cubic-bezier(0.16, 1, 0.3, 1) both; }
@keyframes pop { from { opacity: 0; transform: translateY(16px) scale(0.97); } to { opacity: 1; transform: translateY(0) scale(1); } }

.media { position: relative; border-radius: 14px; overflow: hidden; background: #eee; aspect-ratio: 9 / 12; }
.thumb { width: 100%; height: 100%; object-fit: cover; display: block; animation: fade 0.4s ease both; }
@keyframes fade { from { opacity: 0; } to { opacity: 1; } }
.skeleton {
  width: 100%; height: 100%;
  background: linear-gradient(100deg, #efeaff 30%, #f8f5ff 50%, #efeaff 70%);
  background-size: 200% 100%;
  animation: shimmer 1.2s infinite;
}
@keyframes shimmer { to { background-position: -200% 0; } }

.result-body { display: flex; flex-direction: column; gap: 8px; }
.vtitle { margin: 0; font-size: 15px; color: var(--text); word-break: break-word; font-weight: 700; }
.vauthor { margin: 0; font-size: 13px; color: var(--muted); }
.dl-btn { width: 100%; padding: 15px; margin-top: 6px; }

/* ---- Trust row ---- */
.trust {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 12px 24px;
  margin-top: 32px; font-size: 13.5px; color: var(--muted); font-weight: 500;
}

/* ================= Reveal on scroll ================= */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.in { opacity: 1; transform: translateY(0); }

/* ================= Steps / Features ================= */
.steps, .features { display: grid; gap: 18px; }
.steps { grid-template-columns: repeat(3, 1fr); }
.features { grid-template-columns: repeat(4, 1fr); }

.step, .feature {
  padding: 28px 22px; border-radius: 18px; text-align: left;
  transition: transform 0.25s, box-shadow 0.25s;
}
.step:hover, .feature:hover { transform: translateY(-6px); box-shadow: var(--shadow); }

.step-no {
  display: grid; place-items: center;
  width: 42px; height: 42px; border-radius: 12px;
  font-weight: 800; font-size: 18px; margin-bottom: 16px;
  background: linear-gradient(135deg, var(--violet), var(--pink));
  color: #fff;
  box-shadow: 0 8px 18px rgba(124, 92, 255, 0.3);
}
.step h3, .feature h3 { margin: 0 0 8px; font-size: 17px; font-weight: 700; }
.step p, .feature p { margin: 0; color: var(--muted); font-size: 14px; }

.feat-ic {
  display: grid; place-items: center;
  width: 52px; height: 52px; border-radius: 14px;
  font-size: 24px; margin-bottom: 14px;
}
.ic-1 { background: linear-gradient(135deg, #fff0d6, #ffd9a8); }
.ic-2 { background: linear-gradient(135deg, #ffe0ee, #ffc2dd); }
.ic-3 { background: linear-gradient(135deg, #e3f9ee, #bff0d6); }
.ic-4 { background: linear-gradient(135deg, #e7e3ff, #cdc4ff); }

/* ================= FAQ ================= */
.faq { display: grid; gap: 14px; max-width: 760px; margin: 0 auto; text-align: left; }
.faq details {
  padding: 4px 20px; border-radius: 16px;
  transition: box-shadow 0.25s;
}
.faq details[open] { box-shadow: var(--shadow); }
.faq summary {
  list-style: none; cursor: pointer;
  font-weight: 700; font-size: 15.5px;
  padding: 16px 0; position: relative; padding-right: 30px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; position: absolute; right: 0; top: 50%; transform: translateY(-50%);
  font-size: 22px; font-weight: 400; color: var(--violet);
  transition: transform 0.25s;
}
.faq details[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq details p { margin: 0 0 16px; color: var(--muted); font-size: 14.5px; }

/* ================= Footer ================= */
.foot {
  text-align: center; padding: 56px 22px 64px;
  color: var(--muted); font-size: 13px; line-height: 1.7;
  border-top: 1px solid var(--line);
  max-width: var(--max); margin: 30px auto 0;
  display: flex; flex-direction: column; align-items: center; gap: 12px;
}
.foot .brand { font-size: 18px; }
.foot p { max-width: 460px; margin: 0; }
.copy { font-size: 12px; opacity: 0.7; }

/* ================= Responsive ================= */
@media (max-width: 860px) {
  .features { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 680px) {
  .nav-links a:not(.nav-cta) { display: none; }
  .downloader { flex-direction: column; }
  .btn { width: 100%; }
  .steps { grid-template-columns: 1fr; }
  .result { grid-template-columns: 1fr; }
  .media { aspect-ratio: 16 / 10; max-height: 280px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}