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

:root {
  --bg: #0f0e17;
  --surface: #1a1830;
  --card: #211f35;
  --accent: #f7a823;
  --accent2: #e84393;
  --text: #fffffe;
  --muted: #a7a9be;
  --tab-active: #f7a823;
  --radius: 18px;
}

body {
  font-family: 'Heebo', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 2rem 1rem 4rem;
  overflow-x: hidden;
}

/* Background decorative circles */
.bg-circles { position: fixed; inset: 0; pointer-events: none; z-index: 0; }
.circle {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.18;
}
.c1 { width: 400px; height: 400px; background: #f7a823; top: -100px; right: -120px; }
.c2 { width: 350px; height: 350px; background: #e84393; bottom: -80px; left: -80px; }
.c3 { width: 250px; height: 250px; background: #6c63ff; top: 40%; left: 50%; }

.container {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 540px;
}

header {
  position: relative;
  text-align: center;
  margin-bottom: 2.2rem;
}

/* Usage guide: a quiet "?" in the header corner */
.help-btn {
  position: absolute;
  top: 0; inset-inline-end: 0;
  width: 32px; height: 32px;
  border-radius: 50%;
  background: transparent;
  border: 1.5px solid rgba(255,255,255,0.15);
  color: var(--muted);
  font-family: 'Heebo', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s;
}
.help-btn:hover { border-color: var(--accent); color: var(--accent); }
header h1 {
  font-family: 'Secular One', sans-serif;
  font-size: 2.4rem;
  letter-spacing: -1px;
  color: var(--accent);
  text-shadow: 0 0 30px rgba(247,168,35,0.35);
}
.logo-clock {
  width: 0.9em;
  height: 0.9em;
  vertical-align: -0.1em;
  filter: drop-shadow(0 0 12px rgba(247,168,35,0.35));
}
.subtitle { color: var(--muted); margin-top: 0.35rem; font-size: 1rem; }

/* Tabs */
.tabs-wrapper {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.2rem;
  flex-wrap: wrap;
}
.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  flex: 1;
}
.tab {
  background: var(--surface);
  color: var(--muted);
  border: 2px solid transparent;
  border-radius: 40px;
  padding: 0.42rem 1.1rem;
  font-size: 0.95rem;
  font-family: 'Heebo', sans-serif;
  cursor: pointer;
  transition: all 0.22s ease;
  white-space: nowrap;
}
.tab:hover { border-color: var(--accent); color: var(--accent); }
.tab.active {
  background: var(--accent);
  color: #0f0e17;
  font-weight: 700;
  border-color: var(--accent);
  box-shadow: 0 0 18px rgba(247,168,35,0.4);
}

.add-btn {
  width: 42px; height: 42px;
  border-radius: 50%;
  border: none;
  background: #fdf4e3;
  color: #0f0e17;
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  flex-shrink: 0;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 0 16px rgba(253,244,227,0.25);
}
.add-btn:hover { transform: scale(1.12); box-shadow: 0 0 24px rgba(253,244,227,0.4); }
.add-btn:disabled { opacity: 0.4; cursor: not-allowed; transform: none; }

/* Card */
.card {
  background: var(--card);
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.07);
  padding: 2.5rem 2rem;
  box-shadow: 0 8px 40px rgba(0,0,0,0.4);
  min-height: 260px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Empty state */
.empty-state { text-align: center; color: var(--muted); }
.empty-icon { font-size: 3rem; margin-bottom: 1rem; }
.empty-state p { font-size: 1.05rem; }

/* Person view */
.person-view { text-align: center; width: 100%; }
.avatar {
  width: 72px; height: 72px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  display: flex; align-items: center; justify-content: center;
  font-size: 2rem;
  margin: 0 auto 1rem;
  box-shadow: 0 0 24px rgba(247,168,35,0.3);
}
.person-view h2 {
  font-family: 'Secular One', sans-serif;
  font-size: 1.8rem;
  color: var(--text);
  margin-bottom: 1.4rem;
}

/* Age display */
.age-display {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.8rem;
  margin-bottom: 1.2rem;
  flex-wrap: wrap;
}
.age-block {
  display: flex; flex-direction: column; align-items: center;
  background: var(--surface);
  border-radius: 14px;
  padding: 0.9rem 1.4rem;
  border: 1px solid rgba(255,255,255,0.08);
  min-width: 80px;
}
.age-number {
  font-family: 'Secular One', sans-serif;
  font-size: 2.4rem;
  color: var(--accent);
  line-height: 1;
}
.age-label { font-size: 0.78rem; color: var(--muted); margin-top: 0.3rem; }
.age-sep { font-size: 1.8rem; color: var(--muted); opacity: 0.5; }

.birthdate-label {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

.delete-btn {
  background: transparent;
  border: 1.5px solid rgba(232,67,147,0.5);
  color: var(--accent2);
  border-radius: 40px;
  padding: 0.45rem 1.3rem;
  font-family: 'Heebo', sans-serif;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.2s;
}
.delete-btn:hover { background: var(--accent2); color: #fff; }

/* Footer */
.app-footer { text-align: center; margin-top: 1.6rem; }
.app-footer a { color: var(--muted); font-size: 0.8rem; opacity: 0.7; text-decoration: none; }
.app-footer a:hover { color: var(--accent); opacity: 1; }

/* Modal */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.65);
  backdrop-filter: blur(4px);
  display: flex; align-items: center; justify-content: center;
  z-index: 100;
  animation: fadeIn 0.2s ease;
}
.modal {
  background: var(--card);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius);
  padding: 2rem 1.8rem;
  width: 100%; max-width: 360px;
  box-shadow: 0 16px 60px rgba(0,0,0,0.6);
  animation: slideUp 0.25s ease;
}
.modal h3 { font-family: 'Secular One', sans-serif; font-size: 1.4rem; margin-bottom: 1.4rem; color: var(--accent); }
.modal label {
  display: flex; flex-direction: column;
  gap: 0.4rem;
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}
.modal input {
  background: var(--surface);
  border: 1.5px solid rgba(255,255,255,0.1);
  border-radius: 10px;
  padding: 0.65rem 0.9rem;
  color: var(--text);
  font-family: 'Heebo', sans-serif;
  font-size: 1rem;
  outline: none;
  transition: border 0.2s;
}
.modal input:focus { border-color: var(--accent); }
.modal-error { color: #ff6b6b; font-size: 0.85rem; margin-bottom: 0.5rem; }
.modal-actions { display: flex; gap: 0.8rem; margin-top: 0.5rem; }
.btn-confirm {
  flex: 1;
  background: var(--accent);
  color: #0f0e17;
  font-weight: 700;
  border: none; border-radius: 10px;
  padding: 0.65rem;
  font-family: 'Heebo', sans-serif;
  font-size: 1rem;
  cursor: pointer;
  transition: opacity 0.2s;
}
.btn-confirm:hover { opacity: 0.88; }
.btn-cancel {
  flex: 1;
  background: transparent;
  border: 1.5px solid rgba(255,255,255,0.15);
  color: var(--muted);
  border-radius: 10px;
  padding: 0.65rem;
  font-family: 'Heebo', sans-serif;
  font-size: 1rem;
  cursor: pointer;
  transition: border 0.2s, color 0.2s;
}
.btn-cancel:hover { border-color: var(--accent2); color: var(--accent2); }

/* Guide video */
.guide {
  position: relative;
  width: min(92vw, 380px);
  animation: slideUp 0.25s ease;
}
.guide video {
  display: block;
  width: 100%;
  max-height: 82vh;
  aspect-ratio: 9 / 16;
  object-fit: contain;
  background: #000;
  border-radius: var(--radius);
  box-shadow: 0 16px 60px rgba(0,0,0,0.6);
}
.guide-close {
  position: absolute;
  top: -14px; inset-inline-end: -14px;
  z-index: 1;
  width: 36px; height: 36px;
  border-radius: 50%;
  border: none;
  background: var(--card);
  color: var(--text);
  font-size: 1rem;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(0,0,0,0.5);
}

/* Popup toast */
.popup {
  position: fixed;
  bottom: 2rem;
  left: 50%; transform: translateX(-50%) translateY(20px);
  background: var(--accent);
  color: #0f0e17;
  font-family: 'Secular One', sans-serif;
  font-size: 1.05rem;
  padding: 0.9rem 2rem;
  border-radius: 40px;
  box-shadow: 0 8px 30px rgba(247,168,35,0.45);
  opacity: 0;
  transition: opacity 0.3s, transform 0.3s;
  z-index: 200;
  white-space: nowrap;
}
.popup.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* Utility */
.hidden { display: none !important; }

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: translateY(0); } }

@media (max-width: 420px) {
  header h1 { font-size: 1.8rem; }
  .age-number { font-size: 1.9rem; }
  .card { padding: 2rem 1.2rem; }
}