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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text-primary);
  min-height: 100dvh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

input, textarea, select, button {
  font-family: inherit;
  font-size: inherit;
  outline: none;
  border: none;
  background: none;
  -webkit-appearance: none;
  appearance: none;
}
button { cursor: pointer; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
img { display: block; max-width: 100%; }

/* ── Screen system ── */
.screen {
  display: none;
  flex-direction: column;
  min-height: 100dvh;
  animation: screenIn var(--dur-slow) var(--ease-out) both;
}
.screen.active { display: flex; }

@keyframes screenIn {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Scrollable content ── */
.screen-content {
  flex: 1;
  padding: var(--s4);
  padding-bottom: calc(var(--s7) + var(--sab));
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

/* ── Page header ── */
.page-header {
  display: flex;
  align-items: center;
  gap: var(--s3);
  padding: calc(var(--s4) + var(--sat)) var(--s4) var(--s3);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid transparent;
}
.page-header.scrolled { border-bottom-color: var(--border); }

.page-header h1 {
  font-size: var(--t-xl);
  font-weight: 800;
  letter-spacing: -0.6px;
  flex: 1;
  line-height: 1.1;
}

.back-btn {
  width: 38px; height: 38px;
  border-radius: var(--r-pill);
  background: var(--bg-input);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 20px;
  font-weight: 600;
  color: var(--text-secondary);
  transition: background var(--dur-fast), transform var(--dur-fast);
  user-select: none;
}
.back-btn:active { background: var(--border); transform: scale(0.92); }

/* ── Section title ── */
.section-title {
  font-size: var(--t-xs);
  font-weight: 700;
  color: var(--text-hint);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  padding: var(--s4) 0 var(--s3);
}

/* ── Divider ── */
.divider {
  height: 1px;
  background: var(--border);
  margin: var(--s4) 0;
}

/* ── Empty state ── */
.empty-state {
  text-align: center;
  padding: var(--s8) var(--s6);
  color: var(--text-hint);
}
.empty-state .empty-icon { font-size: 52px; margin-bottom: var(--s3); line-height: 1; }
.empty-state .empty-title { font-size: var(--t-lg); font-weight: 700; color: var(--text-secondary); margin-bottom: var(--s2); }
.empty-state .empty-sub { font-size: var(--t-sm); line-height: 1.5; }

/* ── Loading shimmer ── */
.shimmer {
  background: linear-gradient(90deg, var(--bg-input) 25%, var(--bg-elevated) 50%, var(--bg-input) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.4s infinite;
  border-radius: var(--r-md);
}
@keyframes shimmer {
  from { background-position: 200% 0; }
  to   { background-position: -200% 0; }
}

.loading-row {
  height: 72px;
  margin-bottom: var(--s3);
}

/* ── Offline banner ── */
#offline-banner {
  display: none;
  background: var(--warning-bg);
  color: var(--warning-clr);
  padding: 10px var(--s4);
  font-size: var(--t-xs);
  font-weight: 700;
  text-align: center;
  letter-spacing: 0.3px;
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 999;
}
#offline-banner.show { display: block; }

/* ── Animations ── */
@keyframes shake {
  0%,100% { transform: translateX(0); }
  15%     { transform: translateX(-10px); }
  30%     { transform: translateX(10px); }
  45%     { transform: translateX(-8px); }
  60%     { transform: translateX(8px); }
  75%     { transform: translateX(-4px); }
}

@keyframes pulse-dot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50%       { transform: scale(1.5); opacity: 0.7; }
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes popIn {
  from { opacity: 0; transform: scale(0.88); }
  to   { opacity: 1; transform: scale(1); }
}