:root {
  --bg: #0f0f13;
  --bg2: #1a1a24;
  --bg3: #252535;
  --accent: #e8002d;
  --accent2: #FF8000;
  --text: #f0f0f0;
  --text2: #a0a0b0;
  --border: #333344;
  --sprint: #FFD700;
  --radius: 10px;
  --font: 'Segoe UI', system-ui, sans-serif;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body { background: var(--bg); color: var(--text); font-family: var(--font); min-height: 100vh; }

/* LOGIN */
.screen { display: none; }
.screen.active { display: block; }
#login-screen { align-items: center; justify-content: center; min-height: 100vh; }
.login-card { background: var(--bg2); border: 1px solid var(--border); border-radius: 16px; padding: 48px 40px; text-align: center; max-width: 380px; width: 90%; }
.f1-logo { font-size: 2rem; font-weight: 900; color: var(--accent); margin-bottom: 12px; }
.login-card p { color: var(--text2); margin-bottom: 28px; }
.btn-google { display: flex; align-items: center; gap: 12px; background: white; color: #333; border: none; padding: 12px 24px; border-radius: 8px; font-size: 1rem; cursor: pointer; width: 100%; justify-content: center; font-weight: 500; transition: .2s; }
.btn-google:hover { background: #f5f5f5; transform: translateY(-1px); }

/* HEADER */
header { background: var(--bg2); border-bottom: 2px solid var(--accent); padding: 0 24px; display: flex; align-items: center; gap: 24px; height: 56px; position: sticky; top: 0; z-index: 100; }
.logo { font-weight: 900; font-size: 1.1rem; color: var(--accent); white-space: nowrap; }
nav { display: flex; gap: 4px; flex: 1; }
.tab-btn { background: none; border: none; color: var(--text2); padding: 6px 16px; border-radius: 6px; cursor: pointer; font-size: .9rem; transition: .2s; white-space: nowrap; }
.tab-btn.active, .tab-btn:hover { background: var(--bg3); color: var(--text); }
.user-info { display: flex; align-items: center; gap: 8px; white-space: nowrap; }
.avatar { border-radius: 50%; }
.btn-sm { background: var(--bg3); border: 1px solid var(--border); color: var(--text2); padding: 4px 10px; border-radius: 6px; cursor: pointer; font-size: .8rem; }

/* MAIN CONTENT */
.tab-content { display: none; padding: 24px; max-width: 1100px; margin: 0 auto; }
.tab-content.active { display: block; }
.tab-content h2 { margin-bottom: 20px; font-size: 1.4rem; }

/* GP GRID */
.gp-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; }
.gp-card { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; cursor: pointer; transition: .2s; position: relative; }
.gp-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.gp-card.locked { opacity: .7; cursor: default; }
.gp-card.saved { border-color: #4CAF50; }
.gp-card.sprint-gp { border-top: 3px solid var(--sprint); }
.gp-flag { font-size: 1.8rem; }
.gp-round { font-size: .7rem; color: var(--text2); }
.gp-name { font-weight: 700; font-size: .95rem; margin: 4px 0; }
.gp-dates { font-size: .8rem; color: var(--text2); }
.sprint-badge { background: var(--sprint); color: #000; font-size: .65rem; font-weight: 700; padding: 2px 6px; border-radius: 4px; position: absolute; top: 8px; right: 8px; }
.status-dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; margin-right: 4px; }
.dot-saved { background: #4CAF50; }
.dot-locked { background: var(--accent); }
.dot-open { background: var(--accent2); }

/* FORM */
.form-header { display: flex; align-items: center; gap: 16px; margin-bottom: 24px; flex-wrap: wrap; }
.form-header h2 { flex: 1; }
.deadline-badge { background: var(--bg3); border: 1px solid var(--border); padding: 6px 12px; border-radius: 20px; font-size: .8rem; }
.deadline-badge.open { border-color: #4CAF50; color: #4CAF50; }
.deadline-badge.locked { border-color: var(--accent); color: var(--accent); }
.section-card { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; margin-bottom: 20px; }
.section-card h3 { margin-bottom: 16px; font-size: 1rem; letter-spacing: .05em; }
.sprint-card { border-color: var(--sprint); }
.sprint-card h3 { color: var(--sprint); }
.form-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; }
.form-field { display: flex; flex-direction: column; gap: 6px; }
.form-field label { font-size: .8rem; color: var(--text2); font-weight: 500; }
.form-field select, .form-field input { background: var(--bg3); border: 1px solid var(--border); color: var(--text); padding: 10px 12px; border-radius: 8px; font-size: .9rem; width: 100%; }
.form-field select:focus, .form-field input:focus { outline: none; border-color: var(--accent); }
.form-field select:disabled, .form-field input:disabled { opacity: .5; cursor: not-allowed; }
.hint { font-size: .8rem; color: var(--text2); margin-bottom: 12px; }

/* DRAG LIST */
.drag-list { list-style: none; max-height: 440px; overflow-y: auto; border: 1px solid var(--border); border-radius: 8px; }
.drag-list.locked .drag-item { cursor: default; }
.drag-item { display: flex; align-items: center; gap: 12px; padding: 10px 14px; border-bottom: 1px solid var(--border); cursor: grab; transition: background .15s; user-select: none; }
.drag-item:last-child { border-bottom: none; }
.drag-item:hover { background: var(--bg3); }
.drag-item.dragging { opacity: .4; background: var(--bg3); }
.drag-item.drag-over { background: #1a2a1a; border-top: 2px solid #4CAF50; }
.pos-num { width: 28px; height: 28px; background: var(--bg3); border-radius: 6px; display: flex; align-items: center; justify-content: center; font-size: .8rem; font-weight: 700; color: var(--accent); flex-shrink: 0; }
.pos-num.podium { background: var(--accent); color: white; }
.driver-code { font-weight: 700; font-size: .9rem; min-width: 36px; }
.driver-team-dot { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }
.drag-icon { margin-left: auto; color: var(--text2); font-size: .8rem; }

/* ACTIONS */
.form-actions { display: flex; align-items: center; justify-content: flex-end; gap: 16px; padding: 16px 0; }
.btn-primary { background: var(--accent); color: white; border: none; padding: 12px 28px; border-radius: 8px; font-size: 1rem; font-weight: 700; cursor: pointer; transition: .2s; }
.btn-primary:hover { background: #c00022; transform: translateY(-1px); }
.btn-primary:disabled { opacity: .5; cursor: not-allowed; }
#btn-back { background: var(--bg3); border: 1px solid var(--border); color: var(--text); padding: 8px 16px; border-radius: 8px; cursor: pointer; }
#save-status { font-size: .85rem; }
.status-ok { color: #4CAF50; }
.status-err { color: var(--accent); }

/* HISTORIAL */
.historial-item { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; margin-bottom: 12px; display: flex; align-items: center; gap: 20px; }
.hist-flag { font-size: 2rem; }
.hist-info { flex: 1; }
.hist-gp { font-weight: 700; }
.hist-meta { font-size: .8rem; color: var(--text2); }
.hist-score { text-align: right; }
.hist-pts { font-size: 1.8rem; font-weight: 900; color: var(--accent2); }
.hist-pts-label { font-size: .7rem; color: var(--text2); }
.score-pending { color: var(--text2); font-size: .9rem; }

/* RANKING */
.ranking-filters { margin-bottom: 16px; }
.ranking-filters select { background: var(--bg2); border: 1px solid var(--border); color: var(--text); padding: 8px 12px; border-radius: 8px; }
.ranking-table { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.ranking-row { display: grid; grid-template-columns: 50px 1fr 100px 100px; align-items: center; padding: 14px 20px; border-bottom: 1px solid var(--border); transition: background .15s; }
.ranking-row:last-child { border-bottom: none; }
.ranking-row:hover { background: var(--bg3); }
.ranking-row.header { background: var(--bg3); font-size: .75rem; color: var(--text2); font-weight: 700; text-transform: uppercase; }
.ranking-row.me { background: #1a1a2e; border-left: 3px solid var(--accent); }
.rank-pos { font-weight: 900; font-size: 1.1rem; color: var(--text2); }
.rank-pos.top1 { color: #FFD700; }
.rank-pos.top2 { color: #C0C0C0; }
.rank-pos.top3 { color: #CD7F32; }
.rank-name { display: flex; align-items: center; gap: 8px; }
.rank-pts { font-weight: 700; color: var(--accent2); text-align: right; }
.rank-gps { font-size: .8rem; color: var(--text2); text-align: right; }

@media (max-width: 600px) {
  header { padding: 0 12px; }
  .tab-btn span { display: none; }
  .tab-content { padding: 12px; }
  .gp-grid { grid-template-columns: repeat(2, 1fr); }
  .form-grid { grid-template-columns: 1fr; }
  .ranking-row { grid-template-columns: 40px 1fr 80px; }
  .rank-gps { display: none; }
}