/* Aviation for Kids — What I Want You to Know Before You Fly */
#aviation-for-kids-app * { box-sizing: border-box; margin: 0; padding: 0; font-family: 'Nunito', 'Arial Rounded MT Bold', Arial, sans-serif; }

@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;700;800;900&family=Fredoka+One&display=swap');

#aviation-for-kids-app {
  --navy: #1a3a6e;
  --navy-mid: #2a5aae;
  --navy-light: #e8f4fd;
  --gold: #f0c040;
  --gold-light: #fffbef;
  --gold-mid: #ff9a3c;
  --green: #50c878;
  --green-light: #f0faf4;
  --muted: #6a8aaa;
  --dark: #1a2a3a;
  --cream: #dde8f4;
  max-width: 480px;
  margin: 0 auto;
  padding: 1rem;
  color: #2a3a4a;
  background: #e8f4fd;
  min-height: 100vh;
}

/* Screens */
.avk-screen { display: none; flex-direction: column; gap: 1rem; }
.avk-screen.avk-active { display: flex; }

/* Images */
.avk-hero-img, .avk-lesson-img {
  width: 100%; border-radius: 12px; display: block; object-fit: cover;
}
.avk-lesson-img { max-height: 200px; }

/* Opening card */
.avk-opening-card {
  background: #fff;
  border-radius: 16px; padding: 1.5rem; text-align: center;
  box-shadow: 0 2px 12px rgba(26,58,110,.08);
}
.avk-logo {
  width: 72px; height: 72px; border-radius: 50%;
  background: var(--navy); margin: -52px auto 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 34px; box-shadow: 0 4px 18px rgba(26,58,110,.25);
  position: relative; z-index: 2;
}
.avk-brand {
  font-size: 11px; font-weight: 900; color: var(--muted);
  letter-spacing: 2px; text-transform: uppercase; margin-bottom: 4px;
}
.avk-opening-card h1 { font-family: 'Fredoka One', cursive; font-size: 26px; color: var(--dark); line-height: 1.3; margin-bottom: 4px; }
.avk-subtitle { font-size: 13px; color: var(--muted); font-style: italic; margin-bottom: 16px; font-weight: 700; }

/* Feature list */
.avk-feats {
  background: var(--navy-light); border-radius: 12px;
  padding: 12px; margin-bottom: 16px; text-align: left;
}
.avk-feat { display: flex; align-items: center; gap: 12px; padding: 6px 0; }
.avk-feat-icon { font-size: 22px; flex-shrink: 0; }
.avk-feat-title { font-size: 13px; font-weight: 800; color: var(--dark); }
.avk-feat-sub { font-size: 11px; color: var(--muted); }
.avk-feat-divider { height: 1px; background: var(--cream); margin: 3px 0; }

/* Buttons */
.avk-btn-primary {
  background: linear-gradient(135deg, var(--navy), var(--navy-mid));
  color: #fff; border: none; border-radius: 12px;
  padding: 14px 1.5rem; font-size: 18px; cursor: pointer; width: 100%;
  font-family: 'Fredoka One', cursive; box-shadow: 0 4px 18px rgba(26,58,110,.3);
  transition: transform .2s;
}
.avk-btn-primary:hover { transform: scale(1.02); }
.avk-btn-secondary {
  background: transparent; color: var(--navy); border: 1.5px solid var(--navy);
  border-radius: 10px; padding: 0.65rem 1.25rem; font-size: 14px;
  cursor: pointer; width: 100%; font-family: 'Nunito', sans-serif; font-weight: 800;
}
.avk-btn-secondary:hover { background: var(--navy-light); }

/* Nav */
.avk-nav {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 4px;
  background: #fff; border: 1px solid var(--cream);
  border-radius: 14px; padding: 6px;
  box-shadow: 0 2px 8px rgba(0,0,0,.05);
}
.avk-nav-btn {
  background: transparent; border: none; border-radius: 10px;
  padding: 8px 4px; font-size: 11px; color: var(--muted);
  cursor: pointer; text-align: center; line-height: 1.4;
  font-family: 'Nunito', sans-serif; font-weight: 800;
}
.avk-nav-btn.avk-active { background: var(--navy); color: #fff; }
.avk-nav-icon { font-size: 15px; display: block; margin-bottom: 2px; }

/* Cards */
.avk-card {
  background: #fff; border: 1px solid var(--cream);
  border-radius: 14px; padding: 1.1rem;
  box-shadow: 0 2px 8px rgba(0,0,0,.05);
}
.avk-card-gold {
  background: var(--gold-light); border: 1px solid var(--gold);
  border-radius: 14px; padding: 1.1rem;
}
.avk-card-navy {
  background: linear-gradient(135deg, var(--navy), var(--navy-mid));
  border-radius: 16px; padding: 1.1rem;
  box-shadow: 0 4px 18px rgba(26,58,110,.25);
  cursor: pointer; transition: transform .2s;
}
.avk-card-navy:hover { transform: translateY(-2px); }

/* Progress bar */
.avk-progress-wrap { background: var(--cream); border-radius: 99px; height: 12px; overflow: hidden; margin: 0.5rem 0; }
.avk-progress-fill { background: linear-gradient(90deg, var(--gold), var(--gold-mid)); height: 12px; border-radius: 99px; transition: width 0.5s ease; }

/* Lesson header */
.avk-lesson-header {
  background: #fff; border-radius: 14px;
  padding: 1rem 1.1rem; border-left: 4px solid var(--navy);
  box-shadow: 0 2px 8px rgba(0,0,0,.05);
}
.avk-lesson-number { font-size: 12px; color: var(--muted); font-weight: 900; margin-bottom: 3px; text-transform: uppercase; letter-spacing: 1px; }
.avk-lesson-title { font-family: 'Fredoka One', cursive; font-size: 24px; color: var(--dark); }
.avk-lesson-theme { font-size: 12px; color: var(--muted); font-weight: 700; margin-top: 2px; }

/* Section blocks */
.avk-section-block { margin-bottom: 1rem; }
.avk-section-label {
  font-size: 10px; font-weight: 900; color: var(--navy);
  text-transform: uppercase; letter-spacing: 0.12em; margin-bottom: 6px;
  display: flex; align-items: center; gap: 6px;
}
.avk-section-text { font-size: 14px; color: #2a3a4a; line-height: 1.75; }
.avk-section-text ul { list-style: none; padding: 0; }
.avk-section-text ul li { padding: 4px 0; display: flex; gap: 10px; align-items: flex-start; line-height: 1.5; font-size: 13px; }
.avk-section-text ul li::before { content: '✈'; font-size: 12px; flex-shrink: 0; margin-top: 3px; color: var(--navy); }

.avk-section-activity { font-size: 14px; color: #2a3a4a; line-height: 1.75; }
.avk-section-reflect { font-size: 15px; color: var(--navy); font-style: italic; font-weight: 800; line-height: 1.6; }
.avk-section-funfact { font-size: 13px; color: #1a5a2a; line-height: 1.75; }

/* Section card variants */
.avk-card-activity { background: var(--gold-light); border: 1px solid var(--gold); border-radius: 14px; padding: 1rem; }
.avk-card-activity .avk-section-label { color: #a07010; }
.avk-card-reflect { background: #f0f5ff; border: 1px solid #c0d4f8; border-radius: 14px; padding: 1rem; }
.avk-card-reflect .avk-section-label { color: var(--navy-mid); }
.avk-card-funfact { background: var(--green-light); border: 1px solid var(--green); border-radius: 14px; padding: 1rem; }
.avk-card-funfact .avk-section-label { color: #1a7a3a; }

/* Complete button */
.avk-complete-btn {
  background: linear-gradient(135deg, var(--navy), var(--navy-mid));
  color: #fff; border: none; border-radius: 12px;
  padding: 14px; font-size: 17px; font-weight: 900; cursor: pointer;
  width: 100%; margin-top: 0.5rem;
  font-family: 'Fredoka One', cursive;
  box-shadow: 0 4px 14px rgba(26,58,110,.3); transition: all .2s;
}
.avk-complete-btn.avk-done { background: linear-gradient(135deg, var(--green), #30a858); cursor: default; }
.avk-complete-btn:hover:not(.avk-done) { transform: scale(1.02); }

/* Daily card */
.avk-daily-label { font-size: 10px; font-weight: 900; color: rgba(255,255,255,.7); letter-spacing: 2px; text-transform: uppercase; margin-bottom: 6px; }
.avk-daily-title { font-family: 'Fredoka One', cursive; font-size: 20px; color: #fff; margin-bottom: 4px; }
.avk-daily-sub { font-size: 12px; color: rgba(255,255,255,.75); margin-bottom: 12px; }
.avk-daily-btn { display: inline-block; background: var(--gold); color: var(--dark); font-family: 'Fredoka One', cursive; font-size: 15px; padding: 8px 20px; border-radius: 10px; }

/* Countdown */
.avk-countdown-card { background: #fff; border-radius: 14px; padding: 14px; text-align: center; box-shadow: 0 2px 8px rgba(0,0,0,.05); }
.avk-countdown-card h4 { font-size: 13px; font-weight: 900; color: var(--navy); margin-bottom: 4px; }
.avk-countdown-timer { font-family: 'Fredoka One', cursive; font-size: 28px; color: var(--gold); }
.avk-countdown-sub { font-size: 11px; color: var(--muted); margin-top: 2px; }

/* Section tabs */
.avk-sectabs { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 6px; }
.avk-sectabs::-webkit-scrollbar { display: none; }
.avk-sectab {
  flex-shrink: 0; padding: 7px 14px; border-radius: 20px;
  font-size: 11px; font-weight: 800; cursor: pointer;
  border: 2px solid var(--cream); background: #fff; color: var(--muted);
  transition: all .2s; white-space: nowrap;
}
.avk-sectab.avk-active { background: var(--navy); color: #fff; border-color: var(--navy); }

/* Lesson list */
.avk-lesson-list { display: flex; flex-direction: column; gap: 10px; }
.avk-lesson-row {
  display: flex; align-items: center; gap: 12px;
  background: #fff; border: 2px solid var(--cream);
  border-radius: 14px; padding: 13px 15px;
  cursor: pointer; transition: all .2s;
  box-shadow: 0 2px 8px rgba(0,0,0,.04);
}
.avk-lesson-row:hover:not(.avk-locked) { border-color: var(--gold); transform: translateY(-2px); }
.avk-lesson-row.avk-done-row { border-color: var(--green); background: var(--green-light); }
.avk-lesson-row.avk-locked { opacity: .55; cursor: not-allowed; }
.avk-lesson-row.avk-today-row { border-color: var(--gold); background: var(--gold-light); }
.avk-lesson-num {
  width: 38px; height: 38px; border-radius: 50%; flex-shrink: 0;
  background: var(--navy-light); display: flex; align-items: center;
  justify-content: center; font-size: 13px; font-weight: 900; color: var(--navy);
}
.avk-lesson-row.avk-done-row .avk-lesson-num { background: var(--green); color: #fff; }
.avk-lesson-row.avk-locked .avk-lesson-num { background: #c8d8e8; color: #8aaabb; }
.avk-lesson-row.avk-today-row .avk-lesson-num { background: var(--gold); color: var(--dark); }
.avk-lesson-info { flex: 1; }
.avk-lesson-info h3 { font-size: 13px; font-weight: 900; color: var(--dark); margin-bottom: 2px; }
.avk-lesson-info p { font-size: 11px; color: var(--muted); }
.avk-lesson-arr { font-size: 20px; flex-shrink: 0; color: var(--cream); }
.avk-lesson-row.avk-today-row .avk-lesson-arr { color: var(--gold); }
.avk-lesson-row.avk-done-row .avk-lesson-arr { color: var(--green); }

/* Day grid */
.avk-day-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 6px; }
.avk-day-dot {
  width: 100%; aspect-ratio: 1; border-radius: 50%;
  border: 1px solid var(--cream); background: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 11px; color: var(--muted); cursor: pointer; font-weight: bold;
}
.avk-day-dot.avk-dot-done { background: var(--navy); color: #fff; border-color: var(--navy); }
.avk-day-dot.avk-dot-today { border: 2px solid var(--gold); color: var(--navy); }

/* Badges */
.avk-badge-row { display: flex; gap: 8px; flex-wrap: wrap; }
.avk-badge {
  font-size: 12px; padding: 5px 12px;
  background: var(--navy-light); color: var(--navy);
  border: 1px solid var(--cream); border-radius: 99px;
  font-weight: 800;
}
.avk-badge.avk-earned { background: var(--navy); color: #fff; border-color: var(--navy); }

/* Completion banner */
.avk-completion-card {
  background: linear-gradient(135deg, #e8f8ee, #fff8e0);
  border: 2px solid var(--green); border-radius: 16px;
  padding: 1.25rem; text-align: center;
}
.avk-completion-card h3 { font-size: 16px; color: #2a8a4a; font-weight: 900; margin-bottom: 4px; }
.avk-completion-card p { font-size: 12px; color: #4a8a5a; }

/* Certificate */
.avk-cert {
  background: linear-gradient(160deg, var(--navy-light), var(--gold-light));
  border: 2px solid var(--gold); border-radius: 20px;
  padding: 2rem 1.5rem; text-align: center;
  box-shadow: 0 4px 24px rgba(240,192,64,.2);
}
.avk-cert-seal {
  width: 64px; height: 64px; border-radius: 50%;
  background: var(--navy); margin: 0 auto 1rem;
  display: flex; align-items: center; justify-content: center; font-size: 28px;
}
.avk-cert h2 { font-family: 'Fredoka One', cursive; font-size: 22px; color: var(--dark); margin-bottom: 4px; }
.avk-cert-sub { font-size: 13px; color: var(--muted); margin-bottom: 1rem; font-weight: 700; }
.avk-cert-names { font-size: 15px; color: var(--dark); line-height: 2.4; }
.avk-cert-names strong { color: var(--navy); font-size: 17px; }
.avk-cert-divider { border: none; border-top: 1px solid var(--cream); margin: 1rem 0; }
.avk-cert-quote { font-style: italic; font-size: 13px; color: var(--muted); line-height: 1.7; }
.avk-cert-input {
  width: 100%; padding: 10px 12px; border: 2px solid var(--cream);
  border-radius: 10px; font-size: 15px; margin-bottom: 10px;
  font-family: 'Nunito', sans-serif; color: var(--dark); outline: none;
}
.avk-cert-input:focus { border-color: var(--gold); }

/* Back button */
.avk-back-btn {
  display: flex; align-items: center; gap: 6px;
  background: none; border: none; color: var(--muted);
  font-size: 13px; font-family: 'Nunito', sans-serif;
  font-weight: 800; cursor: pointer; padding: 4px 0;
}
.avk-back-btn:hover { color: var(--navy); }

/* Utility */
.avk-label-sm { font-size: 13px; color: var(--muted); font-weight: 700; }
.avk-heading-lg { font-family: 'Fredoka One', cursive; font-size: 22px; color: var(--dark); }
.avk-text-sm { font-size: 12px; color: var(--muted); }
.avk-subbar {
  background: var(--navy); color: #fff; text-align: center;
  padding: 10px 16px; border-radius: 12px;
  font-size: 13px; font-weight: 700;
}
.avk-subbar span { color: var(--gold); }