/* ============================================================
   Gun Library Design System
   ============================================================ */
:root {
  --gun-950: rgb(9, 11, 14);
  --gun-900: rgb(15, 19, 24);
  --gun-800: rgb(22, 28, 37);
  --gun-750: rgb(26, 33, 44);
  --gun-700: rgb(36, 46, 61);
  --gun-600: rgb(46, 60, 79);
  --gun-500: rgb(61, 80, 105);
  --gun-400: rgb(93, 114, 143);
  --gun-300: rgb(122, 144, 168);
  --gun-100: rgb(208, 220, 232);
  --brass:   rgb(200, 146, 42);
  --brass-light: rgb(219, 169, 60);
  --brass-dim: rgba(200, 146, 42, 0.25);
  --red:     rgb(239, 68, 68);
  --green:   rgb(52, 211, 153);
  --sidebar-width: 220px;
}

/* ============================================================
   Reset & Base
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  background: var(--gun-900);
  color: var(--gun-100);
  font-family: 'Barlow', sans-serif;
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ============================================================
   Layout
   ============================================================ */
.app-shell {
  display: flex;
  min-height: 100vh;
}

/* ============================================================
   Sidebar
   ============================================================ */
.sidebar {
  width: var(--sidebar-width);
  min-height: 100vh;
  background: var(--gun-950);
  border-right: 1px solid var(--gun-700);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
}

.sidebar-brand {
  padding: 1.5rem 1.25rem 1rem;
}

.sidebar-logo-link {
  display: block;
}

.sidebar-logo-line {
  display: block;
  font-family: 'Bebas Neue', sans-serif;
  font-size: 2rem;
  letter-spacing: 0.15em;
  color: var(--brass);
  line-height: 1;
}

.sidebar-divider {
  height: 1px;
  background: var(--gun-700);
  margin-top: 0.75rem;
}

.sidebar-nav {
  flex: 1;
  padding: 0.75rem 0.5rem;
}

.sidebar-nav ul {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.625rem 0.75rem;
  font-family: 'Barlow', sans-serif;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--gun-400);
  border-left: 2px solid transparent;
  border-radius: 0 3px 3px 0;
  transition: color 0.15s, background 0.15s;
  cursor: pointer;
}

.nav-link:hover {
  color: var(--gun-100);
  background: var(--gun-800);
}

.nav-link.active {
  color: var(--brass);
  background: var(--gun-800);
  border-left-color: var(--brass);
}

.nav-link svg {
  flex-shrink: 0;
  opacity: 0.8;
}

.sidebar-footer {
  padding: 0 1.25rem 1.25rem;
}

.sidebar-footer-label {
  display: block;
  margin-top: 0.75rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.625rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gun-600);
}

/* Mobile header (hidden on desktop) */
.mobile-header {
  display: none;
  align-items: center;
  justify-content: space-between;
  background: var(--gun-950);
  border-bottom: 1px solid var(--gun-700);
  padding: 0.75rem 1rem;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
}

.sidebar-logo {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 1.5rem;
  letter-spacing: 0.2em;
  color: var(--brass);
}

.mobile-menu-btn {
  background: none;
  border: none;
  color: var(--gun-400);
  cursor: pointer;
  padding: 0.25rem;
  display: flex;
}

/* ============================================================
   Main Content
   ============================================================ */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  padding: 2rem 2.5rem;
  max-width: 1100px;
}

.view { /* views are shown/hidden via d-none */ }

.d-none { display: none !important; }

/* ============================================================
   Page Header
   ============================================================ */
.page-header {
  margin-bottom: 2rem;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  flex-wrap: wrap;
}

.detail-heading { flex: 1; }

.page-title {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 3rem;
  letter-spacing: 0.15em;
  color: var(--gun-100);
  line-height: 1;
}

.page-divider {
  height: 1px;
  background: var(--gun-700);
  margin-top: 0.4rem;
  margin-bottom: 0.25rem;
}

.page-subtitle {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.625rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--gun-500);
}

.section-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.625rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gun-500);
}

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  font-family: 'Barlow', sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: 3px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
  white-space: nowrap;
}

.btn-sm {
  padding: 0.3rem 0.7rem;
  font-size: 0.75rem;
}

.btn-brass {
  background: var(--brass);
  color: var(--gun-950);
  border-color: var(--brass);
}
.btn-brass:hover {
  background: var(--brass-light);
  border-color: var(--brass-light);
}

.btn-ghost {
  background: transparent;
  color: var(--gun-400);
  border-color: var(--gun-700);
}
.btn-ghost:hover {
  background: var(--gun-800);
  color: var(--gun-100);
}

.btn-danger {
  background: transparent;
  color: var(--red);
  border-color: rgba(239, 68, 68, 0.3);
  font-size: 0.75rem;
  padding: 0.35rem 0.75rem;
}
.btn-danger:hover {
  background: rgba(239, 68, 68, 0.1);
  border-color: var(--red);
}

.btn-back {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  background: none;
  border: none;
  color: var(--gun-400);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  padding: 0.5rem 0;
  transition: color 0.15s;
  align-self: flex-start;
}
.btn-back:hover { color: var(--brass); }

/* ============================================================
   Upload
   ============================================================ */
.upload-container {
  max-width: 640px;
}

.drop-zone {
  border: 1px dashed var(--gun-600);
  border-radius: 4px;
  padding: 3rem 2rem;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  background: var(--gun-800);
}
.drop-zone:hover,
.drop-zone.drag-over {
  border-color: var(--brass);
  background: var(--gun-750);
}
.drop-icon { color: var(--gun-500); margin-bottom: 0.75rem; }
.drop-label {
  color: var(--gun-300);
  font-size: 0.875rem;
  margin-bottom: 0.25rem;
}
.drop-label strong { color: var(--brass); }
.drop-sub {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--gun-500);
}

.upload-status {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--gun-400);
  padding: 1rem 0;
  font-size: 0.875rem;
}

/* ============================================================
   Spinner
   ============================================================ */
.spinner {
  width: 18px;
  height: 18px;
  border: 2px solid var(--gun-700);
  border-top-color: var(--brass);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  flex-shrink: 0;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ============================================================
   Upload Preview Table
   ============================================================ */
.preview-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.check-label {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--gun-400);
  cursor: pointer;
}

.check-label input[type="checkbox"] {
  accent-color: var(--brass);
}

.table-wrap {
  overflow-x: auto;
  border-radius: 4px;
  border: 1px solid var(--gun-700);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
}

.data-table thead tr {
  background: var(--gun-950);
}

.data-table th {
  padding: 0.5rem 0.75rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gun-500);
  text-align: left;
  font-weight: 500;
}

.data-table td {
  padding: 0.6rem 0.75rem;
  border-top: 1px solid var(--gun-700);
  color: var(--gun-100);
  background: var(--gun-800);
}

.data-table tr.dup td {
  color: var(--gun-500);
  background: var(--gun-900);
}

.data-table td input[type="checkbox"] {
  accent-color: var(--brass);
}

.preview-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  margin-top: 1rem;
}

.alert-error {
  margin-top: 0.75rem;
  padding: 0.6rem 0.75rem;
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  border-radius: 3px;
  color: rgb(239, 68, 68);
  font-size: 0.8rem;
}

/* ============================================================
   Sessions Grid
   ============================================================ */
.sessions-grid {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.sessions-row {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 0.75rem;
  margin-bottom: 2rem;
}

/* Group header: ─── MARCH 2026 · .308 WIN ─── */
.group-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
  margin-top: 0.5rem;
}

.group-header-line {
  flex: 1;
  height: 1px;
  background: var(--gun-700);
}

.group-header-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  white-space: nowrap;
  flex-shrink: 0;
}

.group-month {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gun-400);
}

.group-cartridge {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  color: var(--brass);
  background: rgba(200, 146, 42, 0.1);
  border: 1px solid var(--brass-dim);
  border-radius: 2px;
  padding: 0.1rem 0.4rem;
}

/* Session cards generated in JS */
.session-card {
  background: var(--gun-800);
  border: 1px solid var(--gun-700);
  border-left: 2px solid var(--brass);
  border-radius: 4px;
  padding: 1rem;
  transition: background 0.15s, box-shadow 0.15s;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.session-card:hover {
  background: var(--gun-750);
  box-shadow: 0 4px 20px rgba(0,0,0,0.4);
}

.session-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.5rem;
}

.session-date {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--gun-100);
}

.session-time {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  color: var(--gun-500);
  margin-top: 0.15rem;
}

.session-proj-badge {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  color: var(--brass);
  background: rgba(200, 146, 42, 0.12);
  border: 1px solid var(--brass-dim);
  border-radius: 2px;
  padding: 0.15rem 0.4rem;
  white-space: nowrap;
}

.session-meta {
  font-size: 0.78rem;
  color: var(--gun-400);
}

.session-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  margin-top: 0.25rem;
}

.stat-pill {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  padding: 0.15rem 0.4rem;
  border-radius: 2px;
  border: 1px solid;
}
.stat-pill--avg   { color: var(--brass-light); border-color: var(--brass-dim); background: rgba(200,146,42,0.08); }
.stat-pill--sd    { color: var(--gun-300); border-color: var(--gun-700); background: rgba(0,0,0,0.2); }
.stat-pill--es    { color: rgb(251, 191, 36); border-color: rgba(251,191,36,0.3); background: rgba(251,191,36,0.08); }
.stat-pill--fast  { color: var(--green); border-color: rgba(52,211,153,0.3); background: rgba(52,211,153,0.08); }
.stat-pill--slow  { color: rgb(252, 129, 129); border-color: rgba(239,68,68,0.3); background: rgba(239,68,68,0.08); }


/* ============================================================
   Empty / Loading States
   ============================================================ */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  padding: 4rem 2rem;
  color: var(--gun-500);
  text-align: center;
}
.empty-state p { font-size: 0.875rem; }

.loading-state {
  display: flex;
  justify-content: center;
  padding: 4rem;
}

/* ============================================================
   Panel
   ============================================================ */
.panel {
  background: var(--gun-800);
  border: 1px solid var(--gun-700);
  border-radius: 4px;
  margin-bottom: 1rem;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 1rem;
  border-bottom: 1px solid var(--gun-700);
}

.panel-hint {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  color: var(--gun-400);
}

.panel-body {
  padding: 1rem;
}

.panel-body--chart {
  padding: 0.75rem 1rem 1rem;
}

.panel-footer-row {
  margin-top: 0.75rem;
  display: flex;
  justify-content: flex-end;
}

/* ============================================================
   Metadata Form
   ============================================================ */
.meta-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}

.field-group--full {
  grid-column: 1 / -1;
}

.field-label {
  display: block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gun-500);
  margin-bottom: 0.3rem;
}

.field-input {
  width: 100%;
  background: var(--gun-900);
  border: 1px solid var(--gun-700);
  border-radius: 3px;
  color: var(--gun-100);
  font-family: 'Barlow', sans-serif;
  font-size: 0.875rem;
  padding: 0.45rem 0.6rem;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.field-input::placeholder { color: var(--gun-600); }
.field-input:focus {
  border-color: var(--brass);
  box-shadow: 0 0 0 2px rgba(200, 146, 42, 0.15);
}

/* ============================================================
   Stats Row
   ============================================================ */
.stats-row {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.stat-card {
  background: var(--gun-800);
  border: 1px solid var(--gun-700);
  border-radius: 4px;
  padding: 0.75rem 0.5rem;
  text-align: center;
}

.stat-card .stat-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gun-400);
  margin-bottom: 0.35rem;
}

.stat-card .stat-value {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.3rem;
  font-weight: 600;
  line-height: 1;
  color: var(--gun-100);
  margin-bottom: 0.2rem;
}

.stat-value--brass { color: var(--brass-light); }
.stat-value--green { color: var(--green); }
.stat-value--red   { color: rgb(252, 129, 129); }

.stat-card .stat-unit {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gun-500);
}

/* ============================================================
   Shot Badges
   ============================================================ */
.shot-badges-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.shot-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.4rem;
  padding: 0.3rem 0.5rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 3px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s;
  user-select: none;
}

.shot-badge.included {
  background: var(--brass);
  color: var(--gun-950);
  border-color: var(--brass);
}
.shot-badge.included:hover {
  background: var(--brass-light);
}

.shot-badge.excluded {
  background: var(--gun-900);
  color: var(--gun-600);
  border-color: rgba(239, 68, 68, 0.5);
  text-decoration: line-through;
}
.shot-badge.excluded:hover {
  border-color: var(--red);
  color: var(--gun-400);
}

/* ============================================================
   Badges / Pills (for table)
   ============================================================ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.15rem 0.5rem;
  border-radius: 2px;
  border: 1px solid;
}

.badge-new {
  color: var(--green);
  border-color: rgba(52, 211, 153, 0.3);
  background: rgba(52, 211, 153, 0.08);
}

.badge-dup {
  color: rgb(251, 191, 36);
  border-color: rgba(251, 191, 36, 0.3);
  background: rgba(251, 191, 36, 0.08);
}

/* ============================================================
   Save Indicator
   ============================================================ */
.save-indicator {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  color: var(--green);
}

/* ============================================================
   Focus rings (keyboard nav)
   ============================================================ */
:focus-visible {
  outline: 2px solid var(--brass);
  outline-offset: 2px;
}

.field-input:focus-visible {
  outline: none; /* field-input has its own box-shadow focus style */
}

.nav-link:focus-visible,
.session-card:focus-visible,
.session-card-btn:focus-visible {
  outline: 2px solid var(--brass);
  outline-offset: 2px;
}

/* ============================================================
   Chart overrides
   ============================================================ */
#shot-chart { display: block; }

/* ============================================================
   Reduced motion
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  .spinner { animation: none; border-top-color: var(--brass); opacity: 0.6; }
  .sidebar { transition: none; }
  .btn, .nav-link, .session-card, .shot-badge,
  .drop-zone, .field-input, .session-card-btn { transition: none; }
}

/* ============================================================
   Mobile
   ============================================================ */
@media (max-width: 768px) {
  .mobile-header { display: flex; }

  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.25s;
    top: 49px;
  }

  .sidebar.open { transform: translateX(0); }

  .main-content {
    margin-left: 0;
    padding: 1rem;
    margin-top: 49px;
  }

  .stats-row {
    grid-template-columns: repeat(3, 1fr);
  }

  .meta-grid {
    grid-template-columns: 1fr 1fr;
  }

  .page-title { font-size: 2.2rem; }

  /* Prevent iOS zoom on input focus — must be ≥16px */
  .field-input { font-size: 16px; }

  /* Larger tap targets on mobile */
  .shot-badge { min-height: 44px; min-width: 44px; }
  .nav-link { padding: 0.875rem 0.75rem; }
  .session-card-btn { padding: 0.75rem; }
}

@media (max-width: 480px) {
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .meta-grid { grid-template-columns: 1fr; }
}