:root {
  --iy-bg: #071d17;
  --iy-bg-2: #0f3b2f;
  --iy-card: rgba(255,255,255,.08);
  --iy-card-2: rgba(255,255,255,.12);
  --iy-text: #f7fbf4;
  --iy-muted: rgba(247,251,244,.72);
  --iy-gold: #d9b56d;
  --iy-line: rgba(255,255,255,.14);
  --iy-radius: 24px;
  --iy-shadow: 0 24px 80px rgba(0,0,0,.28);
  color-scheme: dark;
}
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; background: radial-gradient(circle at top left, #185b47 0, var(--iy-bg) 44%, #04110e 100%); color: var(--iy-text); font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
button, select, input, textarea { font: inherit; }
button { cursor: pointer; }
.iy-shell { min-height: 100vh; padding-bottom: 92px; }
.iy-hero { padding: 20px; position: relative; overflow: hidden; }
.iy-hero::before { content: ""; position: absolute; inset: -140px -80px auto auto; width: 320px; height: 320px; border-radius: 999px; background: rgba(217,181,109,.22); filter: blur(24px); }
.iy-topbar { position: relative; z-index: 1; display: flex; align-items: center; justify-content: space-between; gap: 16px; max-width: 1180px; margin: 0 auto 22px; }
.iy-brand { display: flex; align-items: center; gap: 12px; }
.iy-brand strong { display: block; font-size: 18px; letter-spacing: -.02em; }
.iy-brand span { display: block; color: var(--iy-muted); font-size: 12px; margin-top: 2px; }
.iy-logo { width: 46px; height: 46px; display: grid; place-items: center; border-radius: 18px; background: linear-gradient(135deg, #123d32, #d9b56d); box-shadow: var(--iy-shadow); }
.iy-menu-btn, .iy-user-types button, .iy-card button { border: 1px solid var(--iy-line); background: rgba(255,255,255,.09); color: var(--iy-text); border-radius: 999px; padding: 11px 16px; }
.iy-hero-card { position: relative; z-index: 1; max-width: 1180px; margin: 0 auto; border: 1px solid var(--iy-line); background: linear-gradient(135deg, rgba(255,255,255,.12), rgba(255,255,255,.05)); border-radius: 34px; padding: clamp(26px, 6vw, 70px); box-shadow: var(--iy-shadow); overflow: hidden; }
.iy-hero-card::after { content: ""; position: absolute; inset: 18px; border: 1px solid rgba(217,181,109,.14); border-radius: 28px; pointer-events: none; }
.iy-badge, .iy-kicker { display: inline-flex; align-items: center; color: #ffe4a7; background: rgba(217,181,109,.12); border: 1px solid rgba(217,181,109,.25); border-radius: 999px; padding: 7px 12px; font-size: 12px; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; }
.iy-hero h1 { max-width: 760px; font-size: clamp(36px, 8vw, 76px); line-height: .92; margin: 20px 0 18px; letter-spacing: -.06em; }
.iy-hero p { max-width: 680px; color: var(--iy-muted); font-size: clamp(16px, 2vw, 20px); line-height: 1.7; margin: 0; }
.iy-user-types { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
.iy-user-types button { background: rgba(217,181,109,.15); border-color: rgba(217,181,109,.32); }
.iy-main { max-width: 1180px; margin: 0 auto; padding: 20px; }
.iy-section { margin-top: 22px; }
.iy-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.iy-card, .iy-panel { border: 1px solid var(--iy-line); background: var(--iy-card); border-radius: var(--iy-radius); box-shadow: var(--iy-shadow); backdrop-filter: blur(20px); }
.iy-card { padding: 22px; min-height: 210px; display: flex; flex-direction: column; align-items: flex-start; }
.iy-feature span { color: var(--iy-gold); font-weight: 800; }
.iy-card h2 { margin: 12px 0 8px; font-size: 22px; letter-spacing: -.03em; }
.iy-card p { margin: 0 0 20px; color: var(--iy-muted); line-height: 1.6; }
.iy-card button { margin-top: auto; background: rgba(255,255,255,.12); }
.iy-panel { padding: 22px; }
.iy-section-head { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin-bottom: 18px; }
.iy-section-head h2 { margin: 8px 0 0; font-size: 28px; letter-spacing: -.04em; }
.iy-section-head select { color: var(--iy-text); background: rgba(255,255,255,.1); border: 1px solid var(--iy-line); border-radius: 14px; padding: 11px 14px; }
.iy-content-mount { display: grid; gap: 12px; }
.iy-dynamic-card { padding: 18px; border-radius: 20px; background: rgba(255,255,255,.07); border: 1px solid var(--iy-line); }
.iy-dynamic-card h3 { margin: 0 0 8px; }
.iy-dynamic-card p { color: var(--iy-muted); line-height: 1.65; margin: 0; }
.iy-loading { color: var(--iy-muted); padding: 24px; text-align: center; }
.iy-bottom-nav { position: fixed; z-index: 20; left: 50%; bottom: 14px; transform: translateX(-50%); width: min(720px, calc(100% - 24px)); display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; padding: 10px; border: 1px solid var(--iy-line); background: rgba(5,19,15,.84); backdrop-filter: blur(22px); border-radius: 24px; box-shadow: var(--iy-shadow); }
.iy-bottom-nav button { border: 0; border-radius: 16px; color: var(--iy-muted); background: transparent; padding: 11px 6px; font-size: 13px; }
.iy-bottom-nav button.active { color: #171205; background: var(--iy-gold); font-weight: 800; }

/* v1.0.3 - Desktop preview shell: hidden on real mobile/tablet by default */
.iy-desktop-preview-stage { display: none; width: 100%; }
.iy-live-app { display: block; }
.iy-preview-frame-body .iy-desktop-preview-stage { display: none !important; }
.iy-preview-frame-body .iy-live-app { display: block !important; }
.iy-device-preview-frame { display: block; border: 0; background: transparent; }

/* v1.0.4 mobile-first guided start */
.iy-user-types button.active,
.iy-inline-actions button.active {
  background: linear-gradient(135deg, rgba(217,181,109,.95), rgba(255,229,166,.86));
  border-color: rgba(255,230,170,.9);
  color: #171205;
  box-shadow: 0 12px 30px rgba(217,181,109,.18);
}
.iy-profile-card { display: grid; gap: 12px; }
.iy-profile-card h3 { margin: 0; font-size: 25px; letter-spacing: -.04em; }
.iy-profile-card p { margin: 0; color: var(--iy-muted); line-height: 1.65; }
.iy-start-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; margin-top: 4px; }
.iy-start-card { text-align: left; border: 1px solid rgba(217,181,109,.24); border-radius: 20px; padding: 15px; background: rgba(217,181,109,.10); color: var(--iy-text); min-height: 118px; }
.iy-start-card strong { display: block; font-size: 15px; margin-bottom: 8px; }
.iy-start-card span { display: block; color: var(--iy-muted); font-size: 13px; line-height: 1.5; }
.iy-card-title-row { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 8px; }
.iy-card-title-row h3 { margin: 0; }
.iy-card-title-row button,
.iy-inline-actions button { border: 1px solid var(--iy-line); background: rgba(255,255,255,.09); color: var(--iy-text); border-radius: 999px; padding: 9px 12px; font-size: 12px; font-weight: 800; white-space: nowrap; }
.iy-announcement { border-color: rgba(217,181,109,.30); background: linear-gradient(135deg, rgba(217,181,109,.14), rgba(255,255,255,.06)); }
.iy-page-detail h3,
.iy-path-card h3,
.iy-daily-card h3 { margin: 10px 0 8px; font-size: 26px; letter-spacing: -.04em; }
.iy-lead { color: #ffe4a7 !important; font-weight: 700; }
.iy-rich-text { display: grid; gap: 12px; color: var(--iy-muted); line-height: 1.75; }
.iy-rich-text p { margin: 0; }
.iy-inline-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 12px; }
.iy-lesson-list { display: grid; gap: 10px; margin-top: 14px; }
.iy-lesson-card { border: 1px solid rgba(255,255,255,.12); border-radius: 18px; padding: 14px; background: rgba(0,0,0,.12); }
.iy-lesson-card strong { display: block; color: #ffe4a7; margin-bottom: 6px; }
.iy-lesson-card p { margin: 0 0 8px; }
.iy-lesson-card small,
.iy-lesson-card em,
.iy-daily-card small,
.iy-daily-card em,
.iy-faq-card small { display: block; color: var(--iy-muted); line-height: 1.55; margin-top: 8px; }
.iy-lesson-card em,
.iy-daily-card em { color: #ffe4a7; font-style: normal; font-weight: 700; }
.iy-faq-card summary { cursor: pointer; font-weight: 800; color: #ffe4a7; }
.iy-faq-card p { margin: 10px 0 0; }

@media (max-width: 640px) {
  .iy-start-grid { grid-template-columns: 1fr; }
  .iy-card-title-row { align-items: flex-start; flex-direction: column; }
  .iy-inline-actions { display: grid; grid-template-columns: 1fr; }
  .iy-page-detail h3,
  .iy-path-card h3,
  .iy-daily-card h3 { font-size: 23px; }
}

@media (min-width: 641px) and (max-width: 1024px) {
  .iy-start-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .iy-start-card:first-child { grid-column: span 2; }
}

/* v1.0.6 - journey progress and mobile engagement polish */
.iy-today-step {
  border-color: rgba(217,181,109,.32);
  background: linear-gradient(135deg, rgba(217,181,109,.16), rgba(255,255,255,.06));
}
.iy-progress-card h3,
.iy-today-step h3 { margin: 0; }
.iy-progress-wrap { display: grid; gap: 8px; margin-top: 14px; }
.iy-progress-bar {
  width: 100%;
  height: 10px;
  border-radius: 999px;
  overflow: hidden;
  background: rgba(255,255,255,.11);
  border: 1px solid rgba(255,255,255,.10);
}
.iy-progress-bar span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, rgba(217,181,109,.88), rgba(255,231,171,.98));
  box-shadow: 0 0 24px rgba(217,181,109,.24);
  transition: width .25s ease;
}
.iy-progress-wrap small { color: var(--iy-muted); line-height: 1.4; }
.iy-lesson-card.is-complete {
  border-color: rgba(217,181,109,.34);
  background: linear-gradient(135deg, rgba(217,181,109,.12), rgba(0,0,0,.10));
}
.iy-lesson-card.is-complete strong::before {
  content: "✓ ";
  color: #ffe4a7;
}
.iy-lesson-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 8px;
}
.iy-lesson-head strong { margin-bottom: 0; }
.iy-lesson-head button {
  flex: 0 0 auto;
  border: 1px solid rgba(217,181,109,.34);
  background: rgba(217,181,109,.13);
  color: #ffe4a7;
  border-radius: 999px;
  padding: 8px 10px;
  font-size: 12px;
  font-weight: 800;
}
.iy-lesson-card.is-complete .iy-lesson-head button {
  color: #171205;
  background: var(--iy-gold);
}
.iy-faq-card:not([open]) {
  padding-bottom: 18px;
}

@media (max-width: 640px) {
  .iy-lesson-head { flex-direction: column; }
  .iy-lesson-head button { width: 100%; justify-content: center; }
  .iy-today-step .iy-card-title-row button { width: 100%; }
}