:root {
  --bg: #0f0f0f;
  --surface: #1a1a1a;
  --surface-2: #222222;
  --border: #2e2e2e;
  --accent: #F5C518;
  --accent-dim: #c49a10;
  --accent-subtle: #2a2000;
  --text: #f0f0f0;
  --text-muted: #888888;
  --tag-bg: #251e00;
  --tag-border: #3d3200;
  --tag-text: #F5C518;
  --star-on: #F5C518;
  --star-off: #333333;
  --danger: #e53e3e;
  --section-accent: #F5C518;
  --radius: 10px;
  --shadow: 0 2px 16px rgba(0,0,0,0.4);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
}

/* ── Header ── */
header {
  background: #000000;
  border-bottom: 2px solid var(--accent);
  padding: 20px 32px;
  display: flex;
  align-items: center;
  gap: 16px;
}
.header-logo {
  width: 36px;
  height: 36px;
  background: var(--accent);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}
header h1 {
  font-size: 1.4rem;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: -0.3px;
}
header p {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 1px;
}

/* ── Layout ── */
main {
  max-width: 980px;
  margin: 0 auto;
  padding: 28px 20px;
}

/* ── Controls bar ── */
.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 20px;
  align-items: center;
}
.search-wrap { position: relative; flex: 1; min-width: 200px; }
.search-wrap input {
  width: 100%;
  padding: 10px 14px 10px 38px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  font-size: 0.93rem;
  outline: none;
  transition: border-color 0.15s;
}
.search-wrap input::placeholder { color: var(--text-muted); }
.search-wrap input:focus { border-color: var(--accent); }
.search-icon {
  position: absolute;
  left: 11px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}
select {
  padding: 10px 12px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  font-size: 0.88rem;
  outline: none;
  cursor: pointer;
}
select:focus { border-color: var(--accent); }
select option { background: var(--surface); color: var(--text); }

.btn {
  padding: 10px 16px;
  border-radius: var(--radius);
  border: none;
  font-size: 0.88rem;
  font-weight: 700;
  cursor: pointer;
  transition: opacity 0.15s, transform 0.1s;
  letter-spacing: 0.01em;
}
.btn:active { transform: scale(0.97); }
.btn-primary { background: var(--accent); color: #000; }
.btn-primary:hover { background: var(--accent-dim); }
.btn-ghost {
  background: transparent;
  border: 1.5px solid var(--border);
  color: var(--text-muted);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn-danger { background: transparent; border: 1px solid #4a1515; color: #e53e3e; font-size: 0.78rem; padding: 5px 10px; }
.btn-danger:hover { background: #2a0808; }

/* ── Results count ── */
.results-meta {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

/* ── Piece cards ── */
.pieces-grid {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.piece-card {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: border-color 0.15s;
}
.piece-card:hover { border-color: #444; }

.card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: 18px 20px 14px;
  gap: 12px;
  border-bottom: 1px solid var(--border);
}
.card-title-block { flex: 1; }
.card-title {
  font-size: 1.08rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 3px;
}
.card-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
}
.card-meta span + span::before { content: " · "; }

/* Difficulty colour scale: green → yellow → orange → red */
.diff-1 { --diff-color: #4ade80; --diff-bg: #052e16; --diff-border: #166534; }
.diff-2 { --diff-color: #a3e635; --diff-bg: #1a2e05; --diff-border: #3f6212; }
.diff-3 { --diff-color: #facc15; --diff-bg: #1c1500; --diff-border: #854d0e; }
.diff-4 { --diff-color: #fb923c; --diff-bg: #1c0a00; --diff-border: #9a3412; }
.diff-5 { --diff-color: #f87171; --diff-bg: #1f0000; --diff-border: #991b1b; }

/* Difficulty badge */
.difficulty-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--diff-bg, var(--accent-subtle));
  border: 1px solid var(--diff-border, #3d3200);
  border-radius: 6px;
  padding: 4px 10px;
  margin-top: 6px;
}
.difficulty-badge .stars { display: flex; gap: 2px; }
.difficulty-badge .star { font-size: 0.75rem; }
.difficulty-badge .star.on { color: var(--diff-color, var(--star-on)); }
.difficulty-badge .star.off { color: var(--star-off); }
.difficulty-badge .diff-label {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--diff-color, var(--accent));
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.card-actions { display: flex; gap: 6px; flex-shrink: 0; align-items: flex-start; }

/* Card body sections */
.card-body { padding: 0; }

.card-section {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}
.card-section:last-child { border-bottom: none; }

.section-label {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 7px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.section-label::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border);
}

.section-text {
  font-size: 0.875rem;
  color: #cccccc;
  line-height: 1.7;
  white-space: pre-line;
}

.tags-row { display: flex; flex-wrap: wrap; gap: 6px; }
.tag {
  background: var(--tag-bg);
  color: var(--tag-text);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 99px;
  border: 1px solid var(--tag-border);
  cursor: pointer;
  transition: background 0.1s, border-color 0.1s;
}
.tag:hover { background: #3a2e00; border-color: var(--accent); }

/* ── Empty state ── */
.empty {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}
.empty-icon { font-size: 3rem; margin-bottom: 12px; opacity: 0.5; }

/* ── Modal ── */
.modal-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  z-index: 100;
  align-items: center;
  justify-content: center;
}
.modal-backdrop.open { display: flex; }
.modal {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: 14px;
  width: min(660px, calc(100vw - 32px));
  max-height: calc(100vh - 48px);
  overflow-y: auto;
  padding: 28px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.6);
}
.modal h2 { font-size: 1.1rem; font-weight: 700; margin-bottom: 22px; color: #fff; }

.form-group { margin-bottom: 16px; }
.form-group label {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  margin-bottom: 5px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 9px 12px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-size: 0.9rem;
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s;
  color: var(--text);
  background: var(--surface-2);
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: #555; }
.form-group input:focus,
.form-group textarea:focus { border-color: var(--accent); }
.form-group textarea { resize: vertical; min-height: 100px; line-height: 1.6; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

/* Difficulty picker */
.diff-picker-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.diff-option {
  padding: 7px 14px;
  border-radius: 8px;
  border: 1.5px solid var(--border);
  background: var(--surface-2);
  color: var(--text-muted);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.12s;
}
.diff-option:hover { border-color: var(--accent); color: var(--accent); }
.diff-option.selected { background: var(--accent-subtle); border-color: var(--accent); color: var(--accent); }

/* Tag input */
.tags-input-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 8px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  cursor: text;
  background: var(--surface-2);
  min-height: 44px;
}
.tags-input-wrap:focus-within { border-color: var(--accent); }
.tags-input-wrap .tag { cursor: default; }
.tag-remove { cursor: pointer; margin-left: 4px; opacity: 0.5; }
.tag-remove:hover { opacity: 1; }
.tags-input-wrap input {
  border: none;
  outline: none;
  font-size: 0.86rem;
  background: transparent;
  flex: 1;
  min-width: 100px;
  padding: 2px 4px;
  color: var(--text);
}
.tags-input-wrap input::placeholder { color: #555; }

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
}

/* ── Header user info ── */
.header-user {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: auto;
}
#header-email {
  font-size: 0.8rem;
  color: var(--text-muted);
}
.btn-sm { padding: 6px 12px; font-size: 0.8rem; }

/* ── Loading screen ── */
#loading-screen {
  position: fixed;
  inset: 0;
  background: var(--bg);
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
}
.loading-spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Login screen ── */
#login-screen {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--bg);
  z-index: 200;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.login-card {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: 16px;
  padding: 40px 36px;
  width: min(420px, 100%);
  box-shadow: 0 24px 64px rgba(0,0,0,0.5);
}
.login-logo {
  font-size: 2.4rem;
  margin-bottom: 12px;
  background: var(--accent);
  width: 56px;
  height: 56px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.login-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 4px;
}
.login-subtitle {
  font-size: 0.85rem;
  color: var(--text-muted);
}
.login-error {
  background: #2a0808;
  border: 1px solid #5a1515;
  color: #f87171;
  font-size: 0.84rem;
  padding: 10px 12px;
  border-radius: 8px;
  margin-top: 12px;
}

/* ── Email list (Manage Access modal) ── */
.email-list {
  list-style: none;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  max-height: 260px;
  overflow-y: auto;
}
.email-list-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  gap: 12px;
}
.email-list-item:last-child { border-bottom: none; }
.email-list-addr {
  font-size: 0.87rem;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
}
.owner-badge {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: var(--accent-subtle);
  color: var(--accent);
  border: 1px solid #3d3200;
  padding: 2px 7px;
  border-radius: 99px;
}

/* ── CSV upload button ── */
.csv-upload-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border: 1.5px dashed var(--border);
  border-radius: 8px;
  color: var(--text-muted);
  font-size: 0.87rem;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}
.csv-upload-label:hover { border-color: var(--accent); color: var(--accent); }

/* ── Card expand / collapse ── */
.card-body {
  display: none;
}
.piece-card.card-expanded .card-body {
  display: block;
}
.expand-chevron {
  font-size: 1.3rem;
  color: var(--text-muted);
  transition: transform 0.2s;
  line-height: 1;
  display: inline-block;
  user-select: none;
}
.piece-card.card-expanded .expand-chevron {
  transform: rotate(90deg);
}
.piece-card:hover .expand-chevron {
  color: var(--accent);
}

/* ── Collection sub-tabs ── */
.sub-tab-bar {
  display: flex;
  gap: 2px;
  margin-bottom: 20px;
  border-bottom: 1.5px solid var(--border);
}
.sub-tab {
  padding: 8px 16px;
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--text-muted);
  background: transparent;
  border: none;
  border-bottom: 2.5px solid transparent;
  margin-bottom: -1.5px;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
  display: flex;
  align-items: center;
  gap: 7px;
}
.sub-tab:hover { color: var(--text); }
.sub-tab.active { color: var(--text); border-bottom-color: var(--accent); }
.sub-tab-count {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.72rem;
  font-weight: 700;
  border-radius: 99px;
  padding: 1px 7px;
  min-width: 20px;
  text-align: center;
}
.sub-tab.active .sub-tab-count {
  background: var(--accent-subtle);
  border-color: #3d3200;
  color: var(--accent);
}

/* ── Tab bar ── */
.tab-bar {
  display: flex;
  gap: 4px;
  margin-bottom: 24px;
  border-bottom: 1.5px solid var(--border);
  padding-bottom: 0;
}
.tab {
  padding: 10px 20px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-muted);
  background: transparent;
  border: none;
  border-bottom: 2.5px solid transparent;
  margin-bottom: -1.5px;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
  letter-spacing: 0.01em;
}
.tab:hover { color: var(--text); }
.tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* ── Collection footer on cards ── */
.collection-footer {
  border-top: 1px solid var(--border);
  padding: 12px 20px;
  background: #111111;
}
.collection-footer-label {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 8px;
}
.collection-footer-inner {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  align-items: center;
}

/* ── Status buttons ── */
.status-btn {
  padding: 5px 12px;
  border-radius: 6px;
  border: 1.5px solid var(--border);
  background: transparent;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
  color: var(--text-muted);
}
/* Active states — always applied regardless of device */
.status-btn.status-aspire.active  { border-color: #7c3aed; color: #a78bfa; background: #1e0a3c; }
.status-btn.status-learning.active { border-color: #0369a1; color: #38bdf8; background: #001e30; }
.status-btn.status-completed.active { border-color: #15803d; color: #4ade80; background: #052e16; }

/* Hover states — only on real pointer devices (not touch) */
@media (hover: hover) {
  .status-btn:hover { color: var(--text); border-color: #555; }
  .status-btn.status-aspire:hover  { border-color: #7c3aed; color: #a78bfa; background: #1e0a3c; }
  .status-btn.status-learning:hover { border-color: #0369a1; color: #38bdf8; background: #001e30; }
  .status-btn.status-completed:hover { border-color: #15803d; color: #4ade80; background: #052e16; }
}

.status-remove-btn {
  padding: 5px 10px;
  border-radius: 6px;
  border: 1px solid #3a1515;
  background: transparent;
  color: #e53e3e;
  font-size: 0.72rem;
  cursor: pointer;
  transition: background 0.12s;
  margin-left: 4px;
}
@media (hover: hover) {
  .status-remove-btn:hover { background: #2a0808; }
}

/* ── Status badge (shown on collection view cards) ── */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 10px;
  border-radius: 99px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.status-badge.badge-aspire { background: #1e0a3c; color: #a78bfa; border: 1px solid #7c3aed; }
.status-badge.badge-learning { background: #001e30; color: #38bdf8; border: 1px solid #0369a1; }
.status-badge.badge-completed { background: #052e16; color: #4ade80; border: 1px solid #15803d; }

/* ── Collection view ── */
.collection-group {
  margin-bottom: 36px;
}
.collection-group-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1.5px solid var(--border);
}
.collection-group-header h2 {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}
.collection-group-header .group-count {
  font-size: 0.78rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: 99px;
  padding: 2px 9px;
}

.status-learning-header h2 { color: #38bdf8; }
.status-aspire-header h2 { color: #a78bfa; }
.status-completed-header h2 { color: #4ade80; }

/* ── Viewing bar (owner browsing another member's collection) ── */
.viewing-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  background: #1a1200;
  border: 1.5px solid #3d3200;
  border-radius: var(--radius);
  padding: 10px 16px;
  margin-bottom: 20px;
  font-size: 0.87rem;
  color: var(--accent);
  flex-wrap: wrap;
}
.viewing-bar label {
  font-weight: 600;
  white-space: nowrap;
}
.viewing-bar select {
  background: #0f0d00;
  border-color: #3d3200;
  color: var(--accent);
  font-size: 0.85rem;
  padding: 6px 10px;
}

/* ── Responsive ── */
/* iOS: prevent zoom on input focus by forcing 16px minimum */
@media (max-width: 640px) {
  input, textarea, select { font-size: 16px !important; }
}

@media (max-width: 640px) {
  /* Header: wrap to two rows */
  header {
    padding: 10px 14px;
    flex-wrap: wrap;
    row-gap: 0;
    align-items: center;
  }
  .header-logo {
    width: 28px;
    height: 28px;
    font-size: 0.95rem;
  }
  header h1 { font-size: 1rem; }
  header > div:nth-child(2) > p { display: none; } /* hide subtitle */
  .header-user {
    width: 100%;
    margin-left: 0;
    border-top: 1px solid #1e1e1e;
    padding: 8px 0 2px;
    gap: 8px;
    justify-content: flex-end;
  }
  #header-email {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 0.72rem;
  }
  .btn-sm { padding: 5px 10px; font-size: 0.76rem; }

  /* Cards */
  .card-header { gap: 8px; }
  .form-row { grid-template-columns: 1fr; }
  .diff-picker-row { gap: 6px; }
  .diff-option { font-size: 0.76rem; padding: 6px 10px; }

  /* Collection sub-tabs */
  .sub-tab { padding: 8px 10px; font-size: 0.78rem; gap: 5px; }
  .tab { padding: 9px 14px; font-size: 0.82rem; }
}