@import "https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap";
:root{--bg:#0a0a0f;--bg-subtle:#12121a;--bg-card:#ffffff08;--bg-card-hover:#ffffff0f;--bg-input:#ffffff0d;--bg-input-focus:#ffffff14;--text:#e8e8ed;--text-muted:#8b8b9e;--text-dim:#555568;--accent:#2563eb;--accent-light:#60a5fa;--accent-dark:#1d4ed8;--accent-glow:#2563eb4d;--accent-gradient:linear-gradient(135deg, #2563eb, #60a5fa);--success:#00cec9;--success-glow:#00cec94d;--warning:#fdcb6e;--error:#ff6b6b;--border:#ffffff14;--border-accent:#2563eb4d;--space-xs:4px;--space-sm:8px;--space-md:16px;--space-lg:24px;--space-xl:32px;--space-2xl:48px;--radius:16px;--radius-sm:10px;--radius-xs:6px;--radius-full:9999px;--shadow-sm:0 2px 8px #0000004d;--shadow-md:0 8px 32px #0006;--shadow-lg:0 16px 64px #00000080;--shadow-glow:0 0 30px var(--accent-glow);--transition-fast:.15s cubic-bezier(.4, 0, .2, 1);--transition-normal:.25s cubic-bezier(.4, 0, .2, 1);--transition-spring:.4s cubic-bezier(.34, 1.56, .64, 1);--font-sans:"Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{-webkit-text-size-adjust:100%;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-size:16px}body{font-family:var(--font-sans);background:var(--bg);color:var(--text);min-height:100dvh;line-height:1.6;overflow-x:hidden}body:before{content:"";pointer-events:none;z-index:0;background:radial-gradient(circle,#2563eb14 0%,#0000 70%);width:60%;height:60%;position:fixed;top:-30%;left:-20%}body:after{content:"";pointer-events:none;z-index:0;background:radial-gradient(circle,#00cec90f 0%,#0000 70%);width:50%;height:50%;position:fixed;bottom:-30%;right:-20%}.app-container{z-index:1;max-width:600px;padding:var(--space-md);padding-bottom:env(safe-area-inset-bottom,var(--space-lg));margin:0 auto;position:relative}.card{background:var(--bg-card);-webkit-backdrop-filter:blur(20px);border:1px solid var(--border);border-radius:var(--radius);padding:var(--space-lg);transition:border-color var(--transition-normal), box-shadow var(--transition-normal)}.card:hover{border-color:var(--border-accent)}.card-glow{box-shadow:var(--shadow-glow);border-color:var(--border-accent)}.heading-xl{letter-spacing:-.03em;background:var(--accent-gradient);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;font-size:2rem;font-weight:800;line-height:1.1}.heading-lg{letter-spacing:-.02em;color:var(--text);font-size:1.5rem;font-weight:700;line-height:1.2}.heading-md{letter-spacing:-.01em;color:var(--text);font-size:1.125rem;font-weight:600}.heading-sm{text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted);font-size:.875rem;font-weight:600}.text-muted{color:var(--text-muted);font-size:.9rem}.input{background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-sm);width:100%;color:var(--text);font-family:var(--font-sans);transition:border-color var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast);outline:none;padding:14px 18px;font-size:1rem}.input::placeholder{color:var(--text-dim)}.input:focus{border-color:var(--accent);background:var(--bg-input-focus);box-shadow:0 0 0 3px var(--accent-glow)}.btn{justify-content:center;align-items:center;gap:var(--space-sm);border-radius:var(--radius-sm);font-family:var(--font-sans);cursor:pointer;transition:all var(--transition-fast);-webkit-tap-highlight-color:transparent;-webkit-user-select:none;user-select:none;border:none;padding:14px 28px;font-size:1rem;font-weight:600;display:inline-flex;position:relative;overflow:hidden}.btn:active{transform:scale(.97)}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.btn-primary{background:var(--accent-gradient);color:#fff;box-shadow:0 4px 16px var(--accent-glow)}.btn-primary:hover:not(:disabled){box-shadow:0 6px 24px var(--accent-glow), 0 0 40px var(--accent-glow);transform:translateY(-1px)}.btn-primary:active:not(:disabled){transform:translateY(0)scale(.97)}.btn-secondary{background:var(--bg-card);color:var(--text);border:1px solid var(--border)}.btn-secondary:hover:not(:disabled){background:var(--bg-card-hover);border-color:var(--border-accent)}.btn-success{color:#fff;box-shadow:0 4px 16px var(--success-glow);background:linear-gradient(135deg,#00cec9,#00b894)}.btn-success:hover:not(:disabled){box-shadow:0 6px 24px var(--success-glow);transform:translateY(-1px)}.btn-sm{border-radius:var(--radius-xs);padding:8px 16px;font-size:.85rem}.btn-full{width:100%}.chip{border-radius:var(--radius-full);cursor:pointer;transition:all var(--transition-fast);-webkit-tap-highlight-color:transparent;-webkit-user-select:none;user-select:none;border:1px solid var(--border);background:var(--bg-card);color:var(--text-muted);align-items:center;padding:10px 18px;font-size:.9rem;font-weight:500;display:inline-flex}.chip:hover{background:var(--bg-card-hover);border-color:#ffffff1f}.chip.active{background:var(--accent-gradient);color:#fff;box-shadow:0 2px 12px var(--accent-glow);border-color:#0000}.section{margin-bottom:var(--space-xl)}.section-header{align-items:center;gap:var(--space-sm);margin-bottom:var(--space-md);display:flex}.grid-container{-webkit-overflow-scrolling:touch;border-radius:var(--radius);border:1px solid var(--border);background:var(--bg-card);overflow-x:auto}.grid-table{border-collapse:separate;border-spacing:0;width:100%;min-width:max-content}.grid-table th,.grid-table td{text-align:center;border-right:1px solid var(--border);border-bottom:1px solid var(--border);padding:0}.grid-table th:last-child,.grid-table td:last-child{border-right:none}.grid-table tr:last-child td{border-bottom:none}.grid-header-cell{text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted);z-index:2;background:#ffffff05;padding:12px 8px;font-size:.75rem;font-weight:600;position:sticky;top:0}.grid-header-cell .day-name{color:var(--text-dim);margin-bottom:2px;font-size:.7rem;display:block}.grid-header-cell .day-date{color:var(--text);font-size:.85rem;font-weight:600;display:block}.grid-time-cell{color:var(--text-muted);white-space:nowrap;z-index:1;text-align:left;background:#ffffff05;min-width:80px;padding:10px 14px;font-size:.8rem;font-weight:500;position:sticky;left:0}.grid-cell{cursor:pointer;min-width:70px;height:48px;transition:all var(--transition-fast);-webkit-tap-highlight-color:transparent;text-align:center;vertical-align:middle;position:relative}.grid-cell:hover{background:var(--bg-card-hover)}.grid-cell.selected{background:var(--accent-gradient);box-shadow:inset 0 0 20px #2563eb33}.grid-cell.selected:after{content:"✓";color:#fff;justify-content:center;align-items:center;font-size:1.1rem;font-weight:700;display:flex;position:absolute;inset:0}.grid-cell-result{text-align:center;vertical-align:middle;min-width:70px;height:48px;transition:all var(--transition-fast);font-size:.85rem;font-weight:600}.grid-cell-result .count{z-index:1;justify-content:center;align-items:center;width:100%;height:100%;min-height:48px;display:flex;position:relative}.heat-0{color:var(--text-dim);background:#ffffff05}.heat-1{color:var(--accent-light);background:#2563eb26}.heat-2{color:var(--accent-light);background:#2563eb4d}.heat-3{color:#fff;background:#2563eb80}.heat-4{color:#fff;background:#2563ebb3}.heat-full{background:var(--accent-gradient);color:#fff}.participant-list{gap:var(--space-sm);margin-top:var(--space-md);flex-wrap:wrap;display:flex}.participant-badge{border-radius:var(--radius-full);background:var(--bg-card);border:1px solid var(--border);color:var(--text-muted);align-items:center;gap:6px;padding:6px 14px;font-size:.8rem;display:inline-flex}.participant-dot{background:var(--accent);border-radius:50%;width:8px;height:8px}.share-container{gap:var(--space-sm);align-items:stretch;display:flex}.share-url{background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--accent-light);text-overflow:ellipsis;white-space:nowrap;flex:1;align-items:center;padding:12px 16px;font-family:SF Mono,Fira Code,monospace;font-size:.8rem;display:flex;overflow:hidden}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}@keyframes shimmer{0%{background-position:-200% 0}to{background-position:200% 0}}@keyframes slideInRight{0%{opacity:0;transform:translate(20px)}to{opacity:1;transform:translate(0)}}.animate-fade-in-up{animation:.5s ease-out forwards fadeInUp}.animate-fade-in{animation:.3s ease-out forwards fadeIn}.animate-slide-in{animation:.4s ease-out forwards slideInRight}.stagger>*{opacity:0;animation:.4s ease-out forwards fadeInUp}.stagger>:first-child{animation-delay:50ms}.stagger>:nth-child(2){animation-delay:.1s}.stagger>:nth-child(3){animation-delay:.15s}.stagger>:nth-child(4){animation-delay:.2s}.stagger>:nth-child(5){animation-delay:.25s}.stagger>:nth-child(6){animation-delay:.3s}.spinner{border:3px solid var(--border);border-top-color:var(--accent);border-radius:50%;width:24px;height:24px;animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.logo{align-items:center;gap:var(--space-sm);color:var(--text);letter-spacing:-.02em;font-size:1.25rem;font-weight:700;text-decoration:none;display:inline-flex}.logo-icon{border-radius:var(--radius-xs);background:var(--accent-gradient);justify-content:center;align-items:center;width:32px;height:32px;font-size:1rem;display:flex}.app-header{padding:var(--space-md) 0;margin-bottom:var(--space-xl);justify-content:space-between;align-items:center;display:flex}.form-label{color:var(--text-muted);margin-bottom:var(--space-sm);text-transform:uppercase;letter-spacing:.04em;font-size:.85rem;font-weight:600;display:block}.tooltip{background:var(--bg-subtle);border:1px solid var(--border);border-radius:var(--radius-xs);color:var(--text);white-space:nowrap;pointer-events:none;z-index:10;box-shadow:var(--shadow-md);padding:8px 14px;font-size:.75rem;animation:.15s ease-out fadeIn;position:absolute;bottom:calc(100% + 8px);left:50%;transform:translate(-50%)}.tooltip:after{content:"";border:5px solid #0000;border-top-color:var(--border);position:absolute;top:100%;left:50%;transform:translate(-50%)}@media (max-width:480px){.app-container{padding:var(--space-sm)}.card{padding:var(--space-md);border-radius:var(--radius-sm)}.heading-xl{font-size:1.75rem}.heading-lg{font-size:1.25rem}.btn{padding:12px 24px}}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:#ffffff26}.tab-bar{gap:var(--space-xs);background:var(--bg-card);border-radius:var(--radius-sm);border:1px solid var(--border);margin-bottom:var(--space-lg);padding:4px;display:flex}.tab{border-radius:var(--radius-xs);color:var(--text-muted);font-family:var(--font-sans);cursor:pointer;transition:all var(--transition-fast);-webkit-tap-highlight-color:transparent;background:0 0;border:none;flex:1;padding:10px 16px;font-size:.85rem;font-weight:500}.tab.active{background:var(--accent-gradient);color:#fff;box-shadow:0 2px 8px var(--accent-glow)}.tab:hover:not(.active){color:var(--text);background:#ffffff08}.success-banner{align-items:center;gap:var(--space-sm);padding:var(--space-md);border-radius:var(--radius-sm);color:var(--success);background:#00cec91a;border:1px solid #00cec933;font-size:.9rem;font-weight:500;animation:.4s ease-out fadeInUp;display:flex}.empty-state{text-align:center;padding:var(--space-2xl) var(--space-lg);color:var(--text-dim)}.empty-state-icon{margin-bottom:var(--space-md);opacity:.5;font-size:3rem}