:root{--bg-color: #ffffff;--text-color: #212529;--card-bg: rgba(255, 255, 255, .95);--nav-bg: #0d6efd;--nav-active: #ffffff;--footer-bg: #f8f9fa;--header-height: 44px;--left-rail-width: 240px;--border-soft: rgba(0, 0, 0, .08);--shadow-soft: 0 8px 24px rgba(0, 0, 0, .06)}html,body{margin:0;padding:0;height:100%}body{background-color:var(--bg-color);color:var(--text-color);font-family:Helvetica Neue,sans-serif}#root{min-height:100vh}.card{width:100%;max-width:720px;background-color:var(--card-bg);border-radius:16px;padding:2rem 2.5rem;box-shadow:var(--shadow-soft);border:1px solid rgba(0,0,0,.06);box-sizing:border-box}.color-Black,.color-Red,.color-Blue,.color-Brown,.color-Orange,.color-Yellow{display:inline-block;padding:.15rem .7rem;border-radius:999px;font-weight:600;font-size:.9rem;line-height:1.2}.color-Black{background-color:#343a40;color:#fff}.color-Red{background-color:#ff4b4b;color:#fff}.color-Blue{background-color:#0d6efd;color:#fff}.color-Brown{background-color:#8b4513;color:#fff}.color-Orange{background-color:#fd7e14;color:#fff}.color-Yellow{background-color:#ff0;color:#212529}.tool-container{width:100%;max-width:720px}.tool-title{text-align:center;font-size:1.8rem;font-weight:600;margin:0 0 1.5rem}.tool-form{max-width:520px;margin:0 auto}.form-group{margin-bottom:1rem}.form-label{display:block;font-weight:500;margin-bottom:.25rem}.form-control{width:100%;padding:.5rem .75rem;border-radius:6px;border:1px solid #ced4da;font-size:.95rem;box-sizing:border-box}.tool-button-row{display:flex;justify-content:center;margin-top:.9rem}.primary-button{background-color:#4285f4;color:#fff;border:none;border-radius:6px;padding:.55rem 1.75rem;font-weight:500;font-size:.95rem;cursor:pointer;transition:background-color .15s ease,transform .05s ease}.primary-button:hover{background-color:#2f6fe0;transform:translateY(-1px)}.primary-button:active{background-color:#2456b2;transform:translateY(0)}.primary-button--small{min-width:220px}.result-box{margin-top:1.25rem;padding:.8rem 1rem;border-radius:8px;font-size:.95rem;text-align:center}.result-box--info{background-color:#e3f7ff;border:1px solid #c1ecff;color:#084d6e}.result-box--error{background-color:#fde2e4;border:1px solid #f8b4b8;color:#842029}.result-box--info strong{margin-right:.3rem}.app-shell{min-height:100vh;display:flex;flex-direction:column}.app-header{height:var(--header-height);display:flex;align-items:center;justify-content:space-between;padding:0 14px;background-color:var(--nav-bg);color:var(--nav-active);box-sizing:border-box}.header-title{font-size:1.1rem;font-weight:600;margin:0}.header-right{display:flex;align-items:center;gap:10px}.header-home{color:var(--nav-active);text-decoration:none;font-weight:700;font-size:.9rem;opacity:.95}.header-home:hover{opacity:1;text-decoration:underline}.header-tools{display:none;border:1px solid rgba(255,255,255,.35);background:#ffffff24;color:var(--nav-active);border-radius:999px;padding:.35rem .75rem;font-weight:800;font-size:.85rem;cursor:pointer}.header-tools:hover{background:#ffffff38}.app-shell-inner{flex:1;display:flex;min-height:0}.left-rail{width:var(--left-rail-width);background:#fff;border-right:1px solid var(--border-soft);padding:10px;box-sizing:border-box}.tools-button{width:auto;display:inline-flex;align-items:center;gap:8px;border-radius:10px;border:1px solid rgba(13,110,253,.25);background:#0d6efd14;color:#0d6efd;padding:6px 10px;font-weight:800;font-size:.85rem;cursor:pointer}.tools-button:hover{background:#0d6efd1f}.sidebar-panel{margin-top:10px}.tool-list{display:flex;flex-direction:column;gap:6px}.tool-button{width:100%;text-align:left;padding:6px 10px;border-radius:6px;border:1px solid transparent;background:transparent;color:var(--text-color);cursor:pointer;font-size:.95rem;transition:background-color .15s ease,color .15s ease,border-color .15s ease}.tool-button:hover{background-color:#0d6efd1a}.tool-button.active{background-color:var(--nav-bg);color:var(--nav-active);border-color:var(--nav-bg)}.app-main{flex:1;position:relative;background:var(--bg-color);padding:16px;box-sizing:border-box;overflow:auto}.main-dim{position:absolute;inset:0;background:#0003;opacity:0;pointer-events:none;transition:opacity .12s ease;z-index:5;border:none}.main-dim.open{opacity:1;pointer-events:auto}.tool-stage{position:relative;z-index:10}.app-footer{height:34px;display:flex;align-items:center;justify-content:center;background-color:var(--footer-bg);border-top:1px solid rgba(0,0,0,.06);font-size:.9rem}@media(max-width:768px){.header-tools{display:inline-flex}.tools-button{display:none}.left-rail{position:fixed;top:var(--header-height);left:0;height:calc(100vh - var(--header-height));width:min(var(--left-rail-width),86vw);transform:translate(-110%);transition:transform .16s ease;z-index:20;box-shadow:8px 0 24px #0000001f}.left-rail.open{transform:translate(0)}.app-shell-inner{display:block}.app-main{padding:12px}.card{padding:1.25rem 1.5rem}.tool-title{font-size:1.5rem}}