/* ============================================================
   COMPONENTS — Reusable UI components
   ============================================================ */

/* --- Login Gate -------------------------------------------- */
.login-gate {
  position: fixed; inset: 0; z-index: 300;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg);
  padding: var(--sp-4);
}
.login-gate.hidden { display: none; }
.login-gate__card {
  text-align: center; max-width: 360px; width: 100%;
}
.login-gate__emoji {
  font-size: 4rem; margin-bottom: var(--sp-3);
  animation: bounce 1.5s ease-in-out infinite;
}
@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}
.login-gate__title {
  font-size: 1.5rem; font-weight: 800; color: var(--accent-dark);
  margin-bottom: var(--sp-1);
}
.login-gate__subtitle {
  font-size: .85rem; color: var(--text-muted); font-weight: 600;
  margin-bottom: var(--sp-4);
}
.login-gate__desc {
  font-size: .8rem; color: var(--text-secondary); line-height: 1.6;
  margin-bottom: var(--sp-5);
}
.login-gate__btn {
  display: inline-flex; align-items: center; gap: var(--sp-2);
  padding: 12px 28px;
  background: var(--surface); color: var(--text);
  border: 1px solid var(--border); border-radius: var(--radius-pill);
  font-size: .9rem; font-weight: 600; cursor: pointer;
  box-shadow: 0 2px 8px rgba(0,0,0,.08);
  transition: box-shadow .2s, transform .15s;
}
.login-gate__btn:hover {
  box-shadow: 0 4px 16px rgba(0,0,0,.12);
  transform: translateY(-1px);
}
.login-gate__btn:active { transform: translateY(0); }
.login-gate__btn:disabled {
  opacity: .6; cursor: not-allowed; transform: none;
}
.login-gate__footer {
  font-size: .7rem; color: var(--text-muted);
  margin-top: var(--sp-4); line-height: 1.5;
}

/* --- App Shell --------------------------------------------- */
.app-shell.hidden { display: none; }

/* --- Top Bar ----------------------------------------------- */
.top-bar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--top-bar-h);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 var(--sp-4);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.top-bar__left {
  display: flex; align-items: center; gap: var(--sp-2);
}
.top-bar__emoji { font-size: 1.4rem; }
.top-bar__title {
  font-size: 1.25rem; font-weight: 700; color: var(--accent-dark);
}
.top-bar__age {
  font-size: .75rem; font-weight: 600; color: var(--text-muted);
  background: var(--accent-light); border-radius: var(--radius-pill);
  padding: 2px 8px;
}
.top-bar__right {
  display: flex; align-items: center; gap: var(--sp-2);
}

/* --- Share Button ------------------------------------------ */
.share-btn {
  width: 36px; height: 36px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: var(--accent-light); color: var(--accent);
  transition: background .2s;
}
.share-btn:hover { background: var(--pink-200); }

/* --- Modal Overlay ----------------------------------------- */
.modal-overlay {
  position: fixed; inset: 0; z-index: 200;
  display: flex; align-items: center; justify-content: center;
  background: rgba(0,0,0,.45);
  padding: var(--sp-4);
  animation: fadeIn .15s ease;
}
.modal-overlay.hidden { display: none; }
.modal-card {
  background: var(--surface); border-radius: var(--radius-lg);
  padding: var(--sp-5); width: 100%; max-width: 400px;
  box-shadow: 0 10px 40px rgba(0,0,0,.2);
  animation: slideUp .2s ease;
}
@keyframes fadeIn { from { opacity: 0; } }
@keyframes slideUp { from { transform: translateY(20px); opacity: 0; } }

.share-link-row {
  display: flex; gap: var(--sp-2); align-items: center;
}
.share-url-input {
  flex: 1; font-size: .8rem; padding: 8px 12px;
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--bg); color: var(--text); font-family: monospace;
}
.share-copied {
  font-size: .75rem; color: var(--success); font-weight: 600;
  margin-top: var(--sp-1); text-align: center;
}
.share-copied.hidden { display: none; }

/* --- Auth Button ------------------------------------------- */
.auth-btn {
  width: 36px; height: 36px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: var(--accent-light); color: var(--accent);
  transition: background .2s;
}
.auth-btn:hover { background: var(--pink-200); }
.auth-btn__avatar {
  width: 28px; height: 28px; border-radius: 50%; object-fit: cover;
}

/* --- Sync Indicator ---------------------------------------- */
.sync-indicator {
  display: flex; align-items: center; color: var(--success);
}
.sync-indicator.syncing { animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* --- Tab Bar ----------------------------------------------- */
.tab-bar {
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 100;
  height: var(--tab-bar-h);
  display: flex; align-items: stretch;
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding-bottom: env(safe-area-inset-bottom, 0);
}
.tab-bar__btn {
  flex: 1; display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 2px;
  font-size: .65rem; font-weight: 600;
  color: var(--gray-400); transition: color .2s;
  touch-action: manipulation;
}
.tab-bar__btn.active { color: var(--accent); }
.tab-bar__btn svg { transition: transform .15s; }
.tab-bar__btn.active svg { transform: scale(1.1); }

/* --- Tab Panels -------------------------------------------- */
.tab-content {
  padding: var(--sp-4);
  max-width: 500px;
  margin: 0 auto;
}
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* --- Card -------------------------------------------------- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--sp-4);
  box-shadow: var(--shadow-sm);
}
.card + .card { margin-top: var(--sp-3); }

/* --- Buttons ----------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: var(--sp-2);
  padding: var(--sp-3) var(--sp-5);
  border-radius: var(--radius-pill);
  font-size: .875rem; font-weight: 600;
  transition: all .2s;
  min-height: 44px;
  touch-action: manipulation;
}
.btn--primary {
  background: var(--accent); color: #fff;
}
.btn--primary:hover { background: var(--accent-dark); }
.btn--secondary {
  background: var(--accent-light); color: var(--accent-dark);
}
.btn--danger {
  background: var(--red-100); color: var(--red-600);
}
.btn--small {
  padding: var(--sp-2) var(--sp-3);
  font-size: .8rem; min-height: 36px;
}
.btn--block { width: 100%; }
.btn--ghost {
  background: transparent; color: var(--text-muted);
}

/* --- Tags / Badges ----------------------------------------- */
.tag {
  display: inline-flex; align-items: center;
  padding: 2px 8px; border-radius: var(--radius-pill);
  font-size: .75rem; font-weight: 600;
  background: var(--accent-light); color: var(--accent-dark);
}
.tag--green { background: var(--green-100); color: var(--green-600); }
.tag--blue  { background: var(--blue-100); color: var(--blue-600); }
.tag--warm  { background: var(--warm-100); color: var(--warm-600); }
.tag--red   { background: var(--red-100); color: var(--red-600); }
.tag--muted { background: var(--gray-100); color: var(--gray-500); }

/* --- Form Elements ----------------------------------------- */
.form-group {
  margin-bottom: var(--sp-4);
}
.form-group label {
  display: block; font-size: .8125rem; font-weight: 600;
  color: var(--text-muted); margin-bottom: var(--sp-1);
}
.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: var(--sp-3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: .9rem;
  background: var(--surface);
  transition: border-color .2s;
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(236,72,153,.15);
}
.form-textarea { resize: vertical; min-height: 60px; }
.form-select { appearance: auto; }

/* --- Quick-action pills ------------------------------------ */
.quick-pills {
  display: flex; flex-wrap: wrap; gap: var(--sp-2); margin-bottom: var(--sp-4);
}
.quick-pill {
  display: flex; align-items: center; gap: 4px;
  padding: var(--sp-2) var(--sp-3);
  border-radius: var(--radius-pill);
  font-size: .8125rem; font-weight: 600;
  background: var(--surface); border: 1px solid var(--border);
  color: var(--text-muted); transition: all .2s;
  touch-action: manipulation;
}
.quick-pill:hover, .quick-pill.active {
  border-color: var(--accent); color: var(--accent);
  background: var(--accent-light);
}

/* --- Log Entry --------------------------------------------- */
.log-entry {
  display: flex; align-items: flex-start; gap: var(--sp-3);
  padding: var(--sp-3) 0;
  border-bottom: 1px solid var(--gray-100);
}
.log-entry:last-child { border-bottom: none; }
.log-entry__icon {
  width: 36px; height: 36px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; flex-shrink: 0;
}
.log-entry__content { flex: 1; min-width: 0; }
.log-entry__title {
  font-size: .875rem; font-weight: 600; color: var(--text);
}
.log-entry__detail {
  font-size: .8rem; color: var(--text-muted); margin-top: 2px;
}
.log-entry__time {
  font-size: .75rem; color: var(--gray-400); white-space: nowrap;
}
.log-entry__delete {
  font-size: 1.1rem; color: var(--gray-300); padding: var(--sp-1);
  transition: color .2s; touch-action: manipulation;
}
.log-entry__delete:hover { color: var(--danger); }

/* --- Section Header ---------------------------------------- */
.section-header {
  margin-bottom: var(--sp-4);
}
.section-header h2 {
  font-size: 1.1rem; font-weight: 700; color: var(--text);
  margin-bottom: var(--sp-1);
}
.section-header p {
  font-size: .8125rem; color: var(--text-muted);
}

/* --- Today Summary Strip ----------------------------------- */
.today-strip {
  display: flex; gap: var(--sp-2); margin-bottom: var(--sp-4);
  overflow-x: auto; padding-bottom: var(--sp-1);
  -webkit-overflow-scrolling: touch;
}
.today-strip::-webkit-scrollbar { display: none; }
.today-stat {
  flex-shrink: 0; text-align: center;
  padding: var(--sp-2) var(--sp-3);
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-sm); min-width: 70px;
}
.today-stat__value {
  font-size: 1.25rem; font-weight: 700; color: var(--accent-dark);
}
.today-stat__label {
  font-size: .65rem; font-weight: 600; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: .03em;
}

/* --- Empty State ------------------------------------------- */
.empty-state {
  text-align: center; padding: var(--sp-8) var(--sp-4);
  color: var(--text-muted);
}
.empty-state__icon { font-size: 2.5rem; margin-bottom: var(--sp-3); opacity: .5; }
.empty-state__text { font-size: .875rem; }

/* --- Milestone Card ---------------------------------------- */
.milestone-card {
  display: flex; align-items: center; gap: var(--sp-3);
  padding: var(--sp-3); background: var(--surface);
  border: 1px solid var(--border); border-radius: var(--radius);
  transition: all .2s; touch-action: manipulation; cursor: pointer;
}
.milestone-card + .milestone-card { margin-top: var(--sp-2); }
.milestone-card.done {
  background: var(--green-100); border-color: var(--green-500);
}
.milestone-card__check {
  width: 24px; height: 24px; border-radius: 50%;
  border: 2px solid var(--gray-300); flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  transition: all .2s;
}
.milestone-card.done .milestone-card__check {
  background: var(--green-500); border-color: var(--green-500); color: #fff;
}
.milestone-card__info { flex: 1; }
.milestone-card__title {
  font-size: .875rem; font-weight: 600;
}
.milestone-card__week {
  font-size: .75rem; color: var(--text-muted);
}
.milestone-card__date {
  font-size: .7rem; color: var(--gray-400);
}

/* --- Weight Chart (simple CSS) ----------------------------- */
.weight-chart {
  display: flex; align-items: flex-end; gap: 4px;
  height: 120px; padding: var(--sp-2) 0;
}
.weight-bar {
  flex: 1; min-width: 20px; max-width: 40px;
  background: var(--accent-light); border-radius: 4px 4px 0 0;
  position: relative; transition: height .3s;
}
.weight-bar__label {
  position: absolute; top: -18px; left: 50%; transform: translateX(-50%);
  font-size: .6rem; font-weight: 700; color: var(--accent-dark);
  white-space: nowrap;
}
.weight-bar__date {
  position: absolute; bottom: -16px; left: 50%; transform: translateX(-50%);
  font-size: .55rem; color: var(--gray-400); white-space: nowrap;
}