:root{--nav-height: 64px;--accent: #2563eb;--bg: linear-gradient(180deg, #0f172a 0%, #071029 100%);--muted: #bfe0ff}*{box-sizing:border-box}html,body,#root{height:100%;margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,Arial;background:var(--bg);color:#e6eef8}.top-nav,nav.top-nav{position:fixed;top:0;left:0;right:0;height:var(--nav-height);display:flex;align-items:center;justify-content:space-between;padding:0 18px;z-index:120;background:#060a14bf;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);border-bottom:1px solid rgba(255,255,255,.03)}.nav-left{font-weight:700;font-size:18px;color:#fff}.nav-center{position:absolute;left:50%;transform:translate(-50%);display:flex;gap:12px;align-items:center;pointer-events:auto}.nav-right{display:flex;gap:10px;align-items:center}.nav-link{background:transparent;border:none;color:var(--muted);padding:8px 10px;border-radius:8px;cursor:pointer;font-weight:600}.nav-link:hover{background:#ffffff08;color:#fff}.nav-button{background:linear-gradient(90deg,#2563eb,#7c3aed);border:none;padding:8px 12px;border-radius:8px;color:#fff;cursor:pointer;font-weight:700}.nav-user{margin-right:8px;color:#cfe6ff;font-weight:600;font-size:13px}.page-with-nav{padding-top:calc(var(--nav-height) + 18px);min-height:calc(100vh - var(--nav-height))}.landing{width:100%;max-width:1100px;margin:24px auto;padding:28px;border-radius:12px;display:grid;grid-template-columns:1fr 360px;gap:24px;align-items:start;position:relative;transition:filter .18s ease}.left,.right{padding:18px}.mode-grid{display:grid;gap:12px}.mode-tile{background:linear-gradient(180deg,#ffffff08,#ffffff03);padding:16px;border-radius:10px;cursor:pointer;border:1px solid rgba(255,255,255,.04);display:flex;gap:12px;align-items:center}.mode-tile:hover{transform:translateY(-4px);box-shadow:0 8px 30px #02061799}.thumb{width:86px;height:66px;border-radius:6px;background:linear-gradient(135deg,#222,#444);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700}.title{font-weight:700;font-size:16px}.info{font-size:14px;color:#dbeafe}.rules-page{min-height:calc(100vh - var(--nav-height));padding-top:calc(var(--nav-height) + 18px);display:flex;justify-content:center;align-items:flex-start}.rules-card{width:100%;max-width:900px;margin:24px;padding:20px;background:#ffffff05;border-radius:10px;border:1px solid rgba(255,255,255,.03)}.placeholder-page{min-height:calc(100vh - 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var(--nav-height));display:flex;justify-content:center;align-items:flex-start;padding:24px 18px}.profile-container{width:100%;max-width:1100px;display:flex;flex-direction:column;gap:18px}.profile-card{width:100%;background:#ffffff05;border:1px solid rgba(255,255,255,.05);border-radius:12px;padding:18px}.profile-card-title{font-weight:800;font-size:18px;margin-bottom:14px;color:#fff}.replay-slots{display:flex;flex-direction:column;gap:14px}.replay-slot-row{display:flex;gap:12px;align-items:center}.replay-slot-box{flex:1;background:#fffffff2;color:#0b1220;border-radius:10px;padding:18px 16px;font-weight:800;text-align:center;box-shadow:0 10px 18px #02061740;border:1px solid rgba(0,0,0,.05)}.replay-slot-box.empty{background:#ffffff1a;color:#ffffffa6;box-shadow:none;border:1px dashed rgba(255,255,255,.15)}.replay-slot-actions{display:flex;gap:10px;align-items:center}.replay-slot-btn{background:linear-gradient(90deg,#2563eb,#7c3aed);border:none;padding:10px 14px;border-radius:10px;color:#fff;cursor:pointer;font-weight:800;transition:transform .12s ease,filter .12s ease,opacity .12s ease}.replay-slot-btn:hover{transform:translateY(-1px);filter:brightness(1.06)}.replay-slot-btn:active{transform:translateY(0);filter:brightness(.98)}.replay-slot-btn:disabled{opacity:.6;cursor:default;transform:none;filter:none}.replay-slot-btn.danger{width:52px;height:44px;display:inline-flex;align-items:center;justify-content:center;padding:0}@media(max-width:900px){.profile-container{max-width:100%}.replay-slot-row{flex-direction:column;align-items:stretch}.replay-slot-actions{justify-content:flex-end;width:100%}.replay-slot-btn.danger{width:100%;height:44px}}.replay-page{width:100%;display:flex;flex-direction:column;align-items:center;padding:18px}.replay-header{width:980px;max-width:calc(100% - 24px);display:flex;align-items:center;gap:14px;margin:6px 0 18px}.replay-header-title{color:#fff;font-weight:800;font-size:26px;line-height:1.15}.replay-layout{width:980px;max-width:calc(100% - 24px);display:flex;gap:24px;align-items:flex-start}.replay-board-col{display:flex;flex-direction:column;align-items:center}.replay-side-col{width:340px;display:flex;flex-direction:column;gap:12px}@media(max-width:1000px){.replay-header-title{font-size:20px}.replay-layout{flex-direction:column;align-items:center}.replay-side-col{width:100%;max-width:520px}}