:root {
  --bg: #0f1117; --surface: #1a1d27; --surface2: #22263a; --border: #2e3350;
  --accent: #4f7cff; --accent2: #7c5cfc; --green: #2dd4a0; --red: #ff5c5c;
  --text: #e8eaf6; --muted: #8892b0; --radius: 10px; --font: 'Inter', system-ui, sans-serif;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { background: var(--bg); color: var(--text); font-family: var(--font); min-height: 100vh; }

#lockScreen {
  position: fixed; inset: 0; background: var(--bg);
  display: flex; align-items: center; justify-content: center; z-index: 9999;
}
#lockScreen.hidden { display: none; }
.lock-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: 14px;
  padding: 36px 32px; width: 100%; max-width: 360px; margin: 20px;
  display: flex; flex-direction: column; gap: 16px;
}
.lock-logo { font-size: 1.4rem; font-weight: 700; letter-spacing: -0.5px; text-align: center; }
.lock-logo span { color: var(--accent); }
.lock-subtitle { font-size: 0.82rem; color: var(--muted); text-align: center; line-height: 1.5; }
.lock-error { font-size: 0.8rem; color: var(--red); text-align: center; min-height: 1rem; }

nav {
  background: var(--surface); border-bottom: 1px solid var(--border);
  padding: 0 24px; display: flex; align-items: center; gap: 8px;
  height: 56px; position: sticky; top: 0; z-index: 100;
}
nav .logo { font-weight: 700; font-size: 1rem; letter-spacing: -0.5px; color: var(--text); margin-right: 8px; }
nav .logo span { color: var(--accent); }
.nav-tab {
  background: none; border: none; color: var(--muted); padding: 6px 14px;
  border-radius: 6px; cursor: pointer; font-size: 0.875rem; font-weight: 500; transition: all .15s;
}
.nav-tab:hover { color: var(--text); background: var(--surface2); }
.nav-tab.active { color: var(--accent); background: rgba(79,124,255,.12); }
nav .spacer { flex: 1; }

.year-select {
  background: var(--surface2); border: 1px solid var(--border); color: var(--text);
  border-radius: 6px; padding: 5px 10px; font-size: 0.875rem; outline: none;
  cursor: pointer; font-family: var(--font); font-weight: 700; margin-right: 4px;
}
.year-select:focus { border-color: var(--accent); }

.year-badge {
  background: rgba(79,124,255,.15); color: var(--accent);
  padding: 2px 8px; border-radius: 4px; font-size: 0.78rem; font-weight: 600;
}

.sync-status {
  display: flex; align-items: center; gap: 6px;
  font-size: 0.75rem; color: var(--muted); padding: 4px 10px;
  border-radius: 6px; border: 1px solid var(--border);
}
.sync-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--muted); }
.sync-dot.ok { background: var(--green); }
.sync-dot.err { background: var(--red); }
.sync-dot.loading { background: var(--accent); animation: pulse 1s infinite; }
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:.3} }

main { max-width: 960px; margin: 0 auto; padding: 28px 20px; }

.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px; margin-bottom: 28px; }
.stat-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px 20px; }
.stat-card .label { font-size: 0.75rem; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; margin-bottom: 8px; }
.stat-card .value { font-size: 1.6rem; font-weight: 700; letter-spacing: -1px; }
.stat-card .sub { font-size: 0.78rem; color: var(--muted); margin-top: 4px; }
.accent-blue { color: var(--accent); } .accent-green { color: var(--green); } .accent-purple { color: var(--accent2); }

.section-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.section-header h2 { font-size: 1rem; font-weight: 600; }

.form-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; margin-bottom: 28px; }
.form-card h2 { font-size: 0.95rem; font-weight: 600; margin-bottom: 18px; }
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 14px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 0.75rem; color: var(--muted); font-weight: 500; text-transform: uppercase; letter-spacing: .05em; }
.form-group input, .form-group select {
  background: var(--surface2); border: 1px solid var(--border); color: var(--text);
  border-radius: 7px; padding: 9px 12px; font-size: 0.875rem; outline: none;
  transition: border-color .15s; font-family: var(--font);
}
.form-group input:focus, .form-group select:focus { border-color: var(--accent); }
.form-group input::placeholder { color: var(--muted); }
.form-actions { margin-top: 16px; display: flex; gap: 10px; align-items: center; }
.btn-primary {
  background: var(--accent); color: #fff; border: none;
  padding: 9px 20px; border-radius: 7px; font-weight: 600; font-size: 0.875rem;
  cursor: pointer; transition: opacity .15s;
}
.btn-primary:hover { opacity: .85; }
.btn-secondary {
  background: none; color: var(--muted); border: 1px solid var(--border);
  padding: 9px 16px; border-radius: 7px; font-size: 0.875rem; cursor: pointer; transition: all .15s;
}
.btn-secondary:hover { color: var(--text); border-color: var(--muted); }
.btn-secondary.danger { color: var(--red); border-color: var(--red); }
.btn-secondary.danger:hover { background: rgba(255,92,92,.08); }
.calc-preview { font-size: 0.8rem; color: var(--green); font-weight: 500; }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 0.86rem; }
thead th {
  text-align: left; padding: 10px 14px; color: var(--muted);
  font-size: 0.72rem; text-transform: uppercase; letter-spacing: .06em;
  border-bottom: 1px solid var(--border); font-weight: 500;
}
tbody tr { transition: background .1s; }
tbody tr:hover { background: var(--surface2); }
tbody td { padding: 11px 14px; border-bottom: 1px solid rgba(46,51,80,.5); }
.badge { display: inline-block; padding: 2px 8px; border-radius: 4px; font-size: 0.72rem; font-weight: 600; }
.badge-ar { background: rgba(79,124,255,.15); color: var(--accent); }
.badge-simple { background: rgba(136,146,176,.12); color: var(--muted); }
.km-col { font-variant-numeric: tabular-nums; font-weight: 500; }
.frais-col { font-variant-numeric: tabular-nums; color: var(--green); font-weight: 600; }
.btn-del { background: none; border: none; color: var(--muted); cursor: pointer; padding: 4px 7px; border-radius: 5px; font-size: 0.85rem; transition: all .15s; }
.btn-del:hover { color: var(--red); background: rgba(255,92,92,.1); }
.btn-edit { background: none; border: none; color: var(--muted); cursor: pointer; padding: 4px 7px; border-radius: 5px; font-size: 0.85rem; transition: all .15s; }
.btn-edit:hover { color: var(--accent); background: rgba(79,124,255,.1); }

.recap-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; }
.recap-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 16px; display: flex; justify-content: space-between; align-items: center; }
.recap-card .month { font-size: 0.85rem; font-weight: 500; }
.recap-card .amounts { text-align: right; }
.recap-card .km-val { font-size: 0.8rem; color: var(--muted); }
.recap-card .euros-val { font-size: 1rem; font-weight: 700; color: var(--green); }
.recap-card.empty { opacity: .4; }

.settings-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; max-width: 560px; margin-bottom: 20px; }
.settings-card h2 { font-size: 0.95rem; font-weight: 600; margin-bottom: 20px; display: flex; align-items: center; gap: 10px; }
.setting-row { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; border-bottom: 1px solid var(--border); gap: 16px; }
.setting-row:last-child { border-bottom: none; }
.setting-label { font-size: 0.875rem; font-weight: 500; }
.setting-desc { font-size: 0.75rem; color: var(--muted); margin-top: 2px; }
.setting-input {
  background: var(--surface2); border: 1px solid var(--border); color: var(--text);
  border-radius: 7px; padding: 7px 12px; width: 180px; font-size: 0.875rem;
  outline: none; text-align: right; font-family: var(--font); transition: border-color .15s;
}
.setting-input:focus { border-color: var(--accent); }
.setting-input.wide { width: 100%; text-align: left; }
.settings-actions { margin-top: 20px; display: flex; gap: 10px; flex-wrap: wrap; }

.setup-banner {
  background: rgba(79,124,255,.08); border: 1px solid rgba(79,124,255,.3);
  border-radius: var(--radius); padding: 20px 24px; margin-bottom: 28px;
}
.setup-banner h3 { font-size: 0.95rem; font-weight: 600; margin-bottom: 8px; color: var(--accent); }
.setup-banner p { font-size: 0.82rem; color: var(--muted); line-height: 1.6; }
.setup-banner a { color: var(--accent); }
.setup-banner ol { margin: 10px 0 0 16px; font-size: 0.82rem; color: var(--muted); line-height: 2; }

.filters { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 16px; align-items: center; }
.filter-select { background: var(--surface); border: 1px solid var(--border); color: var(--text); border-radius: 7px; padding: 7px 12px; font-size: 0.82rem; outline: none; cursor: pointer; font-family: var(--font); }
.filter-search { background: var(--surface); border: 1px solid var(--border); color: var(--text); border-radius: 7px; padding: 7px 12px; font-size: 0.82rem; outline: none; width: 180px; font-family: var(--font); }
.filter-search::placeholder { color: var(--muted); }

.export-btn { background: none; border: 1px solid var(--border); color: var(--muted); padding: 6px 13px; border-radius: 6px; cursor: pointer; font-size: 0.8rem; display: flex; align-items: center; gap: 6px; transition: all .15s; font-family: var(--font); }
.export-btn:hover { color: var(--green); border-color: var(--green); }

.tab-content { display: none; }
.tab-content.active { display: block; }

.toast {
  position: fixed; bottom: 24px; right: 24px; background: var(--surface);
  border: 1px solid var(--border); color: var(--text); padding: 12px 18px;
  border-radius: 8px; font-size: 0.85rem; font-weight: 500;
  box-shadow: 0 8px 24px rgba(0,0,0,.4); transform: translateY(60px);
  opacity: 0; transition: all .25s cubic-bezier(.34,1.56,.64,1); z-index: 999;
}
.toast.show { transform: translateY(0); opacity: 1; }
.toast.success { border-color: var(--green); }
.toast.error { border-color: var(--red); }

.modal-bg { display: none; position: fixed; inset: 0; background: rgba(0,0,0,.6); z-index: 200; align-items: center; justify-content: center; }
.modal-bg.open { display: flex; }
.modal { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 24px; width: 100%; max-width: 480px; margin: 20px; }
.modal h3 { font-size: 1rem; margin-bottom: 18px; }
.modal-actions { margin-top: 18px; display: flex; gap: 10px; }

.empty-state { text-align: center; padding: 48px 20px; color: var(--muted); }
.empty-state .icon { font-size: 2.5rem; margin-bottom: 12px; }

@media (max-width: 600px) {
  main { padding: 16px 12px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  thead th:nth-child(5), tbody td:nth-child(5) { display: none; }
  .year-select { font-size: 0.8rem; padding: 4px 8px; }
}