/* Nền tảng dùng chung: màu, chữ, nút, ô nhập, hộp thoại, thông báo. */
:root {
  --cream: #fff4ee;
  --paper: #ffffff;
  --coral: #ff5a6e;
  --coral-dark: #e8435a;
  --peach: #ffd8c7;
  --wine: #4a1a2c;
  --ink: #3a2a2f;
  --muted: #8a7479;
  --line: #f1dcd4;
  --radius: 18px;
  --shadow: 0 10px 30px rgba(74, 26, 44, 0.12);
  --font: 'Be Vietnam Pro', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --hand: 'Dancing Script', 'Be Vietnam Pro', cursive;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--cream);
  -webkit-tap-highlight-color: transparent;
}
img { max-width: 100%; display: block; }
a { color: var(--coral-dark); }
h1, h2, h3 { line-height: 1.25; color: var(--wine); margin: 0 0 0.5em; }
p { margin: 0 0 0.8em; }
[hidden] { display: none !important; }

.muted { color: var(--muted); }
.small { font-size: 0.875rem; }
.center { text-align: center; }
.hand { font-family: var(--hand); }
.loading-text { text-align: center; padding: 40vh 16px 0; color: var(--muted); }

/* Nút: cao tối thiểu 48px cho dễ bấm bằng ngón cái */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4em;
  min-height: 48px;
  padding: 0.7em 1.4em;
  border: 0;
  border-radius: 999px;
  font: inherit;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  touch-action: manipulation;
  transition: transform 0.15s ease, background-color 0.15s ease, box-shadow 0.15s ease;
}
.btn:active { transform: scale(0.97); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: var(--coral); color: #fff; box-shadow: 0 6px 18px rgba(255, 90, 110, 0.35); }
.btn-primary:hover { background: var(--coral-dark); }
.btn-ghost { background: var(--paper); color: var(--wine); border: 1.5px solid var(--line); }
.btn-soft { background: #ffe9e2; color: var(--wine); }
.btn-sm { min-height: 40px; padding: 0.45em 1em; font-size: 0.9rem; }
.btn-lg { min-height: 56px; padding: 0.8em 2em; font-size: 1.1rem; }
.badge { display: inline-block; padding: 0.3em 0.9em; border-radius: 999px; background: var(--peach); color: var(--wine); font-size: 0.85rem; font-weight: 600; }

/* Ô nhập liệu — cỡ chữ 16px để iPhone không tự phóng to */
.field { display: block; margin-bottom: 1.1rem; }
.field-label { display: flex; justify-content: space-between; gap: 8px; font-weight: 600; margin-bottom: 0.4rem; color: var(--wine); }
.counter { font-weight: 400; color: var(--muted); font-size: 0.8rem; }
.input {
  width: 100%;
  padding: 0.8em 1em;
  border: 1.5px solid var(--line);
  border-radius: 14px;
  background: var(--paper);
  font: inherit;
  font-size: 16px;
  color: var(--ink);
  resize: vertical;
}
.input:focus { outline: none; border-color: var(--coral); box-shadow: 0 0 0 3px rgba(255, 90, 110, 0.15); }

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  min-height: 40px;
  padding: 0.4em 1em;
  border-radius: 999px;
  border: 1.5px solid var(--line);
  background: var(--paper);
  font: inherit;
  font-size: 0.95rem;
  color: var(--ink);
  text-decoration: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
}
.chip.selected { background: var(--coral); border-color: var(--coral); color: #fff; }

/* Thông báo nhỏ */
.toast {
  position: fixed;
  left: 50%;
  bottom: calc(96px + env(safe-area-inset-bottom));
  transform: translate(-50%, 20px);
  max-width: calc(100% - 32px);
  padding: 0.75em 1.2em;
  border-radius: 14px;
  background: var(--wine);
  color: #fff;
  font-size: 0.95rem;
  box-shadow: var(--shadow);
  opacity: 0;
  transition: opacity 0.25s, transform 0.25s;
  z-index: 1000;
  pointer-events: none;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* Hộp thoại */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(58, 26, 40, 0.45);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  z-index: 900;
  animation: fade-in 0.2s ease;
}
.modal {
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
  background: var(--paper);
  border-radius: 24px 24px 0 0;
  padding: 24px 20px calc(24px + env(safe-area-inset-bottom));
  animation: slide-up 0.25s ease;
}
@media (min-width: 600px) {
  .modal-backdrop { align-items: center; }
  .modal { border-radius: 24px; }
}
.modal-actions { display: flex; gap: 10px; justify-content: flex-end; margin: 12px 0; flex-wrap: wrap; }
.link-box { padding: 0.7em 1em; background: var(--cream); border-radius: 12px; word-break: break-all; font-size: 0.9rem; }

.empty-state { min-height: 100vh; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; padding: 24px 16px; }
.empty-emoji { font-size: 64px; margin-bottom: 12px; }

@keyframes fade-in { from { opacity: 0; } }
@keyframes slide-up { from { transform: translateY(40px); opacity: 0; } }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}