:root{--bg:#0e1116;--panel:#161b22;--border:#2a323d;--text:#e6edf3;--muted:#8b949e;--accent:#fd9791;--accent-strong:#f97066}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;min-height:100vh}a{color:var(--accent)}.center{min-height:100vh;display:grid;place-items:center;padding:24px}.card{width:100%;max-width:380px;background:var(--panel);border:1px solid var(--border);border-radius:16px;padding:32px}.card h1{font-size:22px;margin:0 0 4px}.card p.sub{font-size:14px;margin:0 0 24px}.card p.sub,label{color:var(--muted)}label{display:block;font-size:13px;margin-bottom:6px}input[type=email],input[type=password],input[type=text]{width:100%;padding:12px 14px;font-size:15px;color:var(--text);background:#0d1117;border:1px solid var(--border);border-radius:10px;outline:none}input:focus{border-color:var(--accent)}button{width:100%;margin-top:16px;padding:12px 14px;font-size:15px;font-weight:600;color:#1a1207;background:var(--accent);border:none;border-radius:10px;cursor:pointer}button:hover{background:var(--accent-strong)}button:disabled{opacity:.6;cursor:not-allowed}.error{color:#ff7b72;margin-top:12px}.error,.hint{font-size:13px}.hint{color:var(--muted);margin-top:16px;text-align:center}.linklike{background:none;border:none;color:var(--accent);width:auto;margin:0;padding:0;font-size:13px;cursor:pointer}.linklike:disabled{color:var(--muted);cursor:default}.code-input{letter-spacing:10px;text-align:center;font-size:24px}.viewer{display:flex;flex-direction:column;height:100vh}.viewer-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 16px;border-bottom:1px solid var(--border);background:var(--panel);flex:0 0 auto}.viewer-bar .title{font-size:14px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.viewer-bar .counter{font-size:13px;color:var(--muted);font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.viewer-bar .actions{display:flex;gap:8px;align-items:center}.nav-btn{width:auto;margin:0;padding:8px 14px;background:#21262d;color:var(--text);font-weight:500}.nav-btn:hover:not(:disabled){background:#2d333b}.logout-btn{width:auto;margin:0;padding:8px 14px;background:transparent;border:1px solid var(--border);color:var(--muted);font-weight:500}.stage{position:relative;flex:1 1 auto;display:grid;place-items:center;padding:24px;overflow:auto;-webkit-user-select:none;-moz-user-select:none;user-select:none}.slide-wrap{position:relative;display:inline-block;line-height:0}.slide-wrap,.slide-wrap img{max-width:100%;max-height:100%}.slide-wrap img{border-radius:8px;box-shadow:0 8px 40px rgba(0,0,0,.5);-webkit-user-drag:none}.slide-link{position:absolute;display:block;border-radius:3px;transition:background-color .12s ease,box-shadow .12s ease}.slide-link:hover{background-color:rgba(253,151,145,.28);box-shadow:0 0 0 2px rgba(253,151,145,.7)}.watermark{position:absolute;inset:-25%;display:flex;flex-wrap:wrap;gap:40px 70px;align-content:center;justify-content:center;transform:rotate(-30deg);pointer-events:none;overflow:hidden;opacity:.08}.watermark span{color:#000;font-size:15px;font-weight:600;white-space:nowrap;line-height:1}.flip-btn{position:absolute;top:50%;transform:translateY(-50%);z-index:3;width:40px;height:40px;margin:0;padding:0;display:grid;place-items:center;font-size:20px;font-weight:400;line-height:1;color:var(--text);background:rgba(20,24,30,.55);border:1px solid var(--border);border-radius:999px;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);transition:background-color .12s ease,opacity .12s ease}.flip-btn:hover{background:rgba(20,24,30,.85);color:#fff}.flip-btn:disabled{opacity:0;pointer-events:none}.flip-btn.left{left:16px}.flip-btn.right{right:16px}@media (max-width:640px){.flip-btn{width:34px;height:34px;font-size:17px}.flip-btn.left{left:8px}.flip-btn.right{right:8px}.card{padding:24px}.viewer-bar{padding:8px 10px;gap:8px}.viewer-bar .title{max-width:32vw}.logout-btn,.nav-btn{padding:8px 10px;font-size:13px}.stage{padding:12px}}