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

:root {
  --bg: #f5f5f4;
  --surface: #fff;
  --text-1: #1a1a1a;
  --text-2: #7a7a7a;
  --text-3: #aaa;
  --text-4: #ccc;
  --border: #e8e8e6;
  --badge-bg: #eaeae8;
  --badge-text: #888;
  --btn-bg: #1a1a1a;
  --btn-text: #fff;
  --btn-hover: #333;
  --card-bg: #fafaf9;
  --card-border: #eee;
  --divider: #ebebea;
  --icon-bg: #1a1a1a;
  --icon-text: #fff;
  --shadow: rgba(0,0,0,0.04);
}

body.dark {
  --bg: #141416;
  --surface: #1c1c20;
  --text-1: #e8e8e6;
  --text-2: #808086;
  --text-3: #58585e;
  --text-4: #3e3e44;
  --border: #28282d;
  --badge-bg: #28282d;
  --badge-text: #6e6e74;
  --btn-bg: #e8e8e6;
  --btn-text: #141416;
  --btn-hover: #d0d0ce;
  --card-bg: #1a1a1e;
  --card-border: #28282d;
  --divider: #28282d;
  --icon-bg: #e8e8e6;
  --icon-text: #141416;
  --shadow: rgba(0,0,0,0.15);
}

html { height: 100%; }

body {
  font-family: "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text-1);
  min-height: 100%;
  display: flex;
  justify-content: center;
  -webkit-font-smoothing: antialiased;
  transition: background 0.4s, color 0.4s;
}

.anim {
  opacity: 0;
  transform: translateY(18px);
  animation: fadeUp 0.65s ease forwards;
  animation-delay: calc(var(--d, 0) * 1ms);
}

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

.theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 50;
  width: 36px;
  height: 36px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text-3);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.25s;
}

.theme-toggle:hover {
  color: var(--text-1);
  border-color: var(--text-3);
}

.page {
  max-width: 460px;
  width: 100%;
  padding: 72px 28px 60px;
}

.hero {
  text-align: center;
  margin-bottom: 52px;
}

.app-icon {
  position: relative;
  width: fit-content;
  margin: 0 auto 22px;
}

.app-icon-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: var(--icon-bg);
  opacity: 0.08;
  filter: blur(20px);
  transition: background 0.4s;
}

.app-icon-box {
  position: relative;
  width: 54px;
  height: 54px;
  border-radius: 15px;
  background: var(--icon-bg);
  color: var(--icon-text);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 20px var(--shadow);
  transition: background 0.4s, color 0.4s, box-shadow 0.4s;
}

.hero-title {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--text-1);
  margin-bottom: 8px;
  line-height: 1.3;
}

.hero-sub {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.6;
}

.why {
  text-align: center;
  margin-bottom: 44px;
}

.why p {
  font-size: 13px;
  color: var(--text-3);
  line-height: 1.7;
  max-width: 380px;
  margin: 0 auto;
}

.steps { margin-bottom: 28px; }

.step {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 18px 0;
  border-bottom: 1px solid var(--divider);
  transition: border-color 0.4s;
}

.step:first-child { border-top: 1px solid var(--divider); }

.step-num {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 7px;
  background: var(--badge-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  color: var(--badge-text);
  margin-top: 1px;
  transition: background 0.4s, color 0.4s;
}

.step-text {
  font-size: 13.5px;
  color: var(--text-2);
  line-height: 1.65;
}

.step-text strong {
  color: var(--text-1);
  font-weight: 600;
}

.key-badge {
  display: inline-block;
  padding: 1px 6px;
  background: var(--badge-bg);
  border-radius: 4px;
  font-size: 10.5px;
  font-weight: 700;
  color: var(--badge-text);
  letter-spacing: 0.5px;
  text-transform: uppercase;
  vertical-align: 1px;
  font-style: normal;
  transition: background 0.4s, color 0.4s;
}

.note {
  text-align: left;
  padding: 16px 18px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 10px;
  margin-bottom: 52px;
  transition: all 0.4s;
}

.note-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--text-4);
  margin-bottom: 6px;
}

.note p {
  font-size: 12.5px;
  color: var(--text-3);
  line-height: 1.65;
}

.support { text-align: center; }

.support-text {
  font-size: 13.5px;
  color: var(--text-2);
  margin-bottom: 12px;
  line-height: 1.7;
}

.support-footer {
  font-size: 12px;
  color: var(--text-4);
}

.support-arrow {
  font-size: 13px;
  color: var(--text-4);
  text-align: center;
  margin-top: 10px;
  transition: color 0.4s;
}