:root {
  --indigo: #4f46e5;
  --indigo-dark: #3730a3;
  --ink: #111827;
  --paper: #ffffff;
  --muted: #c7d2fe;
  --grey: #6b7280;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: linear-gradient(180deg, #4f46e5 0%, #3730a3 100%);
  color: #fff;
  line-height: 1.6;
}

.wrap {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
}

header.hero {
  text-align: center;
  padding: 96px 24px 72px;
}

.hero .logo {
  width: 96px;
  height: 96px;
  border-radius: 22px;
  margin-bottom: 28px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}

.hero h1 {
  font-size: clamp(32px, 6vw, 52px);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.hero p.tagline {
  font-size: clamp(16px, 2.5vw, 21px);
  color: var(--muted);
  margin: 16px auto 36px;
  max-width: 640px;
}

.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: 28px;
  font-size: 17px;
  font-weight: 700;
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn:hover { transform: translateY(-2px); }

.btn-primary {
  background: #fff;
  color: var(--indigo);
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.25);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.35);
  margin-left: 12px;
}

section.feature {
  padding: 72px 24px;
  text-align: center;
}

section.feature:nth-of-type(even) {
  background: rgba(0, 0, 0, 0.14);
}

.feature h2 {
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 800;
  letter-spacing: -0.01em;
}

.feature p.sub {
  color: var(--muted);
  font-size: clamp(15px, 2vw, 19px);
  margin: 12px auto 48px;
  max-width: 620px;
}

/* ===== mockups ===== */
.mock-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
}

.shorts-card {
  width: 200px;
  height: 356px;
  background: var(--ink);
  border-radius: 18px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

.shorts-card .tag {
  position: absolute;
  bottom: 14px;
  left: 14px;
  color: #9ca3af;
  font-size: 13px;
  font-weight: 700;
}

.play-tri {
  width: 0;
  height: 0;
  border-top: 22px solid transparent;
  border-bottom: 22px solid transparent;
  border-left: 34px solid #fff;
}

.arrow {
  font-size: 48px;
  font-weight: 800;
}

.player-card {
  width: 380px;
  max-width: 90vw;
  background: #fff;
  border-radius: 18px;
  padding: 14px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

.player-card .screen {
  background: var(--ink);
  border-radius: 10px;
  height: 210px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.player-card .seek {
  margin: 16px 4px 8px;
  height: 6px;
  border-radius: 3px;
  background: #e5e7eb;
  position: relative;
}

.player-card .seek .prog {
  width: 60%;
  height: 100%;
  border-radius: 3px;
  background: var(--indigo);
}

.player-card .seek .head {
  position: absolute;
  left: 60%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--indigo);
}

.player-card .meta {
  display: flex;
  justify-content: space-between;
  color: var(--grey);
  font-size: 13px;
  font-weight: 600;
  padding: 4px;
}

/* popup mockup */
.popup-card {
  width: 340px;
  max-width: 90vw;
  margin: 0 auto;
  background: #fff;
  color: #202124;
  border-radius: 18px;
  padding: 24px 26px;
  text-align: left;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

.popup-card h3 { font-size: 19px; margin-bottom: 14px; }

.popup-card .group-label {
  font-size: 11px;
  font-weight: 700;
  color: var(--grey);
  letter-spacing: 0.04em;
  margin-bottom: 6px;
}

.popup-card .opt {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 0;
  font-size: 15px;
}

.radio {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 2.5px solid #d1d5db;
  flex-shrink: 0;
}

.radio.on {
  border-color: var(--indigo);
  position: relative;
}

.radio.on::after {
  content: "";
  position: absolute;
  inset: 3px;
  border-radius: 50%;
  background: var(--indigo);
}

.popup-card .toggle-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid #eee;
  margin-top: 12px;
  padding-top: 14px;
  font-size: 15px;
}

.switch {
  width: 44px;
  height: 26px;
  border-radius: 13px;
  background: var(--indigo);
  position: relative;
  flex-shrink: 0;
}

.switch::after {
  content: "";
  position: absolute;
  top: 3px;
  right: 3px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #fff;
}

/* floating button mockup */
.float-btn {
  position: absolute;
  top: 20px;
  right: -60px;
  background: var(--indigo);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  padding: 10px 18px;
  border-radius: 22px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.4);
  white-space: nowrap;
}

@media (max-width: 560px) {
  .float-btn { right: -20px; }
}

footer {
  text-align: center;
  padding: 56px 24px 72px;
  color: var(--muted);
  font-size: 14px;
}

footer a { color: #fff; }

footer .links { margin-bottom: 12px; }

footer .links a { margin: 0 10px; }

/* feedback / privacy pages */
.page {
  max-width: 720px;
  margin: 0 auto;
  padding: 72px 24px;
}

.page h1 { font-size: 36px; font-weight: 800; margin-bottom: 8px; }

.page p.lead { color: var(--muted); font-size: 18px; margin-bottom: 40px; }

.card {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 16px;
  padding: 28px;
  margin-bottom: 20px;
}

.card h2 { font-size: 20px; margin-bottom: 8px; }

.card p { color: var(--muted); font-size: 15px; margin-bottom: 18px; }

.page.privacy h2 { font-size: 20px; margin: 32px 0 8px; }

.page.privacy p, .page.privacy li { color: var(--muted); font-size: 15px; }

.page.privacy ul { padding-left: 22px; }

.back { display: inline-block; margin-bottom: 32px; color: #fff; font-size: 14px; }