:root,[data-theme=light]{--bg: #f8f9fb;--card: #ffffff;--text: #1f2937;--muted: #6b7280;--accent: #4f46e5;--accent-hover: #4338ca;--border: #e5e7eb;--good: #10b981;--warn: #f59e0b;--bad: #ef4444}[data-theme=dark]{--bg: #111827;--card: #1f2937;--text: #f9fafb;--muted: #9ca3af;--accent: #818cf8;--accent-hover: #6366f1;--border: #374151;--good: #34d399;--warn: #fbbf24;--bad: #f87171}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);line-height:1.5}nav{background:var(--card);border-bottom:1px solid var(--border);padding:1rem 2rem;display:flex;justify-content:space-between;align-items:center;position:sticky;top:0;z-index:10}.brand{font-size:1.5rem;font-weight:800;color:var(--accent);cursor:pointer;text-decoration:none}.nav-user{display:flex;align-items:center;gap:.75rem;font-size:.95rem}button,.btn{background:var(--accent);color:#fff;border:none;padding:.55rem 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var(--border);border-radius:.5rem;background:#fff;cursor:pointer;text-decoration:none;color:inherit}[data-theme=dark] .event-item{background:var(--card)}.event-item:hover{border-color:var(--accent)}.badge{display:inline-block;padding:.2rem .6rem;border-radius:999px;font-size:.75rem;font-weight:600;margin-left:.5rem}.badge-host{background:#e0e7ff;color:var(--accent)}.badge-open{background:#d1fae5;color:#065f46}.badge-closed{background:#fee2e2;color:#991b1b}.tabs{display:flex;gap:.5rem;margin-bottom:1rem;border-bottom:1px solid var(--border)}.tab{padding:.6rem 1rem;background:none;border:none;color:var(--muted);border-bottom:2px solid transparent;border-radius:0}.tab.active{color:var(--accent);border-bottom-color:var(--accent)}.hidden{display:none!important}.error{color:var(--bad);font-size:.9rem;margin-top:.25rem}.success{color:var(--good);font-size:.9rem;margin-top:.25rem}.participants{display:flex;gap:.5rem;flex-wrap:wrap;margin:1rem 0}.chip{background:#f3f4f6;padding:.3rem .7rem;border-radius:999px;font-size:.85rem;display:inline-flex;align-items:center}[data-theme=dark] .chip{background:#374151}.chip button{background:none;border:none;padding:0;margin-left:.25rem;cursor:pointer;color:var(--muted);font-size:1rem;line-height:1}.invite-row{display:flex;gap:.5rem;align-items:flex-start}.invite-row input{flex:1}.settings-menu{position:relative}.settings-menu>button{padding:.4rem .6rem;font-size:1.1rem;line-height:1}.settings-dropdown{position:absolute;top:calc(100% + .5rem);right:0;background:var(--card);border:1px solid var(--border);border-radius:.5rem;box-shadow:0 4px 12px #00000026;min-width:200px;padding:.5rem 0;z-index:100}.dropdown-item{display:flex;align-items:center;width:100%;padding:.6rem 1rem;background:none;border:none;color:var(--text);font-size:.95rem;cursor:pointer;text-align:left;font-family:inherit}.dropdown-item:hover{background:var(--bg)}.dropdown-item 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.calendar-day:hover{background:#374151}.calendar-day.selected{background:var(--accent);color:#fff;border-color:var(--accent)}.calendar-day.disabled{color:var(--muted);background:var(--bg);cursor:not-allowed;opacity:.5}.calendar-day.disabled:hover{background:var(--bg)}.calendar-day.empty{background:transparent;border-color:transparent;cursor:default}.calendar-day-label{text-align:center;font-size:.75rem;font-weight:600;color:var(--muted);padding:.25rem 0}.deadline-picker-inline{display:flex;gap:1rem;align-items:flex-start;flex-wrap:wrap}.deadline-calendar-wrap{flex:1;min-width:280px;max-width:320px}.deadline-time-wrap{min-width:120px;max-width:160px}.deadline-time-wrap label{margin-top:0}@media(max-width:600px){nav{padding:1rem}main{margin:1rem auto}.grid{grid-template-columns:50px repeat(var(--days),minmax(60px,1fr))}.invite-row{flex-direction:column}.invite-row button{width:100%}.calendar,.deadline-calendar-wrap,.deadline-time-wrap{max-width:100%}.deadline-picker-inline{flex-direction:column}}