/* Base Theme Variables */
:root {
  --bg: #f5f7fa;
  --bg-alt: #ffffff;
  --bg-accent: #eef2f7;
  --border: #d9e1ea;
  --text: #1d2733;
  --text-dim: #5a6b7d;
  --brand: #2563eb;
  --brand-accent: #4191ff;
  --danger: #dc2626;
  --success: #059669;
  --warning: #d97706;
  --radius-sm: 4px;
  --radius: 10px;
  --radius-pill: 999px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.06), 0 0 0 1px var(--border);
  --shadow: 0 4px 12px -2px rgba(0,0,0,.08), 0 2px 4px rgba(0,0,0,.06);
  --trans-fast: 120ms cubic-bezier(.4,0,.2,1);
  font-family: system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,sans-serif;
}

/* Dark Mode */
:root.dark {
  --bg: #0f1720;
  --bg-alt: #15212c;
  --bg-accent: #1e2d3a;
  --border: #243544;
  --text: #e2ecf5;
  --text-dim: #9db1c2;
  --brand: #3b82f6;
  --brand-accent: #60a5fa;
  --danger: #f87171;
  --success: #34d399;
  --warning: #fbbf24;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.6), 0 0 0 1px #243544;
  --shadow: 0 4px 14px -4px rgba(0,0,0,.6), 0 2px 6px -2px rgba(0,0,0,.5);
}

* { box-sizing: border-box; }
html,body { height: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); line-height: 1.45; -webkit-font-smoothing: antialiased; }

.page { max-width: 1000px; margin: 0 auto; padding: clamp(1rem,2.5vw,2rem); }

.site-header { display: flex; align-items: center; gap: .75rem; justify-content: space-between; margin-bottom: 1.5rem; }
.title { margin: 0; font-size: clamp(1.8rem,3.6vw,2.6rem); letter-spacing: .5px; }

.theme-toggle { cursor: pointer; background: var(--bg-alt); border: 1px solid var(--border); padding: .55rem .8rem; border-radius: var(--radius-pill); font-size: 1rem; line-height: 1; box-shadow: var(--shadow-sm); transition: background var(--trans-fast), color var(--trans-fast), transform 140ms ease; }
.theme-toggle:hover { background: var(--bg-accent); }
.theme-toggle:active { transform: translateY(2px); }

.panel { background: var(--bg-alt); border: 1px solid var(--border); box-shadow: var(--shadow-sm); border-radius: var(--radius); padding: 1.1rem 1.25rem 1.4rem; margin-bottom: 1.75rem; backdrop-filter: saturate(1.2) blur(8px); }
.panel-title { margin-top: 0; margin-bottom: .9rem; font-size: 1.25rem; }

.table { width: 100%; border-collapse: collapse; font-size: .95rem; }
.table thead tr { background: linear-gradient(var(--bg-accent), var(--bg-alt)); }
.table th, .table td { padding: .65rem .75rem; text-align: left; }
.table tbody tr { border-top: 1px solid var(--border); transition: background var(--trans-fast); }
.table tbody tr:hover { background: var(--bg-accent); }

/* Row movement animation (FLIP technique) */
.table tbody tr.moving { transition: transform 420ms cubic-bezier(.25,.8,.25,1); }
.table tbody tr.rank-up { animation: flashUp 900ms ease; }
.table tbody tr.rank-down { animation: flashDown 900ms ease; }
tr.route-row.hidden { display: none; }
tr.route-row td { background: var(--bg-accent); border-top: 1px dashed var(--border); }
.buckets-wrap {
  display:flex;
  gap:.55rem;
}
.buckets-wrap .bucket { margin-right:0; }
@keyframes flashUp { 0%{box-shadow:0 0 0 0 rgba(16,185,129,.0);} 25%{box-shadow:0 0 0 4px rgba(16,185,129,.4);} 100%{box-shadow:0 0 0 0 rgba(16,185,129,0);} }
@keyframes flashDown { 0%{box-shadow:0 0 0 0 rgba(239,68,68,.0);} 25%{box-shadow:0 0 0 4px rgba(239,68,68,.35);} 100%{box-shadow:0 0 0 0 rgba(239,68,68,0);} }

.col-rank { font-weight: 600; width: 60px; }
.col-score { font-variant-numeric: tabular-nums; font-weight: 500; }
.col-change { width: 90px; }
.col-buckets { min-width: 240px; }
.bucket { display:inline-block; margin-right:.5rem; }
[data-field="nickname"][data-editable="0"] { cursor:not-allowed; opacity:.6; }
tr.locked .bucket-select { opacity:.4; }
.id-btn { background: var(--bg-accent); border:1px solid var(--border); border-radius: var(--radius-pill); padding:.35rem .75rem; cursor:pointer; font:inherit; font-size:.7rem; letter-spacing:.5px; text-transform:uppercase; box-shadow: var(--shadow-sm); transition: background var(--trans-fast), border-color var(--trans-fast); }
.id-btn:hover { background: var(--bg); }
.id-btn.unlocked { background: linear-gradient(135deg,var(--brand),var(--brand-accent)); color:#fff; border-color: var(--brand); }
.toolbar input:focus { outline:none; box-shadow:0 0 0 2px color-mix(in srgb,var(--brand) 55%,transparent); }
.rank-delta { font-size:.7rem; font-weight:600; padding:.15rem .45rem; border-radius:999px; background:var(--bg-accent); border:1px solid var(--border); vertical-align: middle; }
.rank-delta.up { color: var(--success); border-color: color-mix(in srgb,var(--success) 45%, var(--border)); }
.rank-delta.down { color: var(--danger); border-color: color-mix(in srgb,var(--danger) 45%, var(--border)); }
.bucket-select {
  cursor:pointer;
  border:2px solid var(--border);
  border-radius:6px;
  padding:.4rem .55rem;
  font-weight:600;
  min-width:72px;
  text-align:center;
  transition:background-color .25s, border-color .25s, color .25s;
}
.bucket-select:disabled {
  opacity:.75;
  cursor:not-allowed;
}
.bucket-select option {
  font-weight:600;
}
.bucket-select:focus { outline:none; border-color: var(--brand); background: var(--bg-alt); box-shadow:0 0 0 2px color-mix(in srgb, var(--brand) 55%, transparent); }

[contenteditable="true"] { outline: 2px dashed transparent; border-radius:4px; padding:2px 4px; }
[contenteditable="true"]:focus { outline-color: var(--brand); background: var(--bg-accent); }

.badge { display: inline-block; min-width: 2.2ch; text-align: center; padding: .25rem .55rem; border-radius: var(--radius-pill); font-size: .75rem; font-weight: 600; letter-spacing: .5px; background: var(--bg-accent); border: 1px solid var(--border); }
.badge.up { color: var(--success); background: color-mix(in srgb, var(--success) 12%, var(--bg-alt)); border-color: color-mix(in srgb, var(--success) 45%, var(--border)); }
.badge.down { color: var(--danger); background: color-mix(in srgb, var(--danger) 12%, var(--bg-alt)); border-color: color-mix(in srgb, var(--danger) 45%, var(--border)); }
.badge.same { color: var(--text-dim); }

.form { display: flex; flex-direction: column; gap: 1rem; }
.grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit,minmax(180px,1fr)); }
.field { display: flex; flex-direction: column; gap: .35rem; font-size: .8rem; letter-spacing: .5px; text-transform: uppercase; color: var(--text-dim); }
.field input { padding: .65rem .75rem; border-radius: var(--radius-sm); border: 1px solid var(--border); font: inherit; background: var(--bg); color: var(--text); transition: border-color var(--trans-fast), background var(--trans-fast); }
.field input:focus { outline: none; border-color: var(--brand); background: var(--bg-alt); box-shadow: 0 0 0 2px color-mix(in srgb, var(--brand) 55%, transparent); }

.fieldset { border: 1px dashed var(--border); padding: .9rem 1rem 1.2rem; border-radius: var(--radius); }
.fieldset legend { padding: 0 .5rem; font-size: .75rem; letter-spacing: 1px; text-transform: uppercase; color: var(--text-dim); }
.fieldset .colors { grid-template-columns: repeat(auto-fit,minmax(120px,1fr)); }

.actions { display: flex; gap: .75rem; }
.btn { --btn-bg: var(--bg-accent); --btn-border: var(--border); cursor: pointer; padding: .7rem 1.05rem; border: 1px solid var(--btn-border); background: var(--btn-bg); color: var(--text); font: inherit; font-weight: 500; border-radius: var(--radius-sm); box-shadow: var(--shadow-sm); transition: background var(--trans-fast), border-color var(--trans-fast), transform 140ms ease; }
.btn:hover { background: var(--bg); }
.btn:active { transform: translateY(2px); }
.btn.primary { --btn-bg: linear-gradient(135deg,var(--brand),var(--brand-accent)); --btn-border: var(--brand); color: #fff; }
.btn.primary:hover { filter: brightness(1.05); }
.btn.primary:active { filter: brightness(.92); }

.site-footer { text-align: center; padding: 1rem 0 2rem; font-size: .75rem; color: var(--text-dim); }

/* Smooth fade & dark mode transition */
body, .panel, .btn, .badge, .theme-toggle, .field input, .table tbody tr { transition: background-color var(--trans-fast), color var(--trans-fast), border-color var(--trans-fast); }

/* Scrollbar styling (WebKit + Firefox) */
* { scrollbar-width: thin; scrollbar-color: var(--brand) var(--bg-accent); }
*::-webkit-scrollbar { width: 10px; }
*::-webkit-scrollbar-track { background: var(--bg-accent); }
*::-webkit-scrollbar-thumb { background: var(--brand); border: 2px solid var(--bg-accent); border-radius: 20px; }
*::-webkit-scrollbar-thumb:hover { background: var(--brand-accent); }

@media (max-width: 640px) {
  .col-rank { width: 48px; }
  .theme-toggle { padding: .5rem .65rem; }
  .panel { padding: .95rem 1rem 1.2rem; }
  .actions { flex-direction: column; }
  .btn { width: 100%; }
}