:root{--accent: #4c5bd4;--accent-weak: #eef0fb;--ink: #23262e;--ink-soft: #5b616e;--ink-faint: #9aa0ab;--line: #e7e9ef;--surface: #ffffff;--canvas: #f4f5f8;--editor-bg: #fbfbfd;--radius: 10px;--radius-sm: 7px;--shadow-sm: 0 1px 2px rgba(24, 27, 34, .06);--shadow-md: 0 10px 30px rgba(24, 27, 34, .1);--dur: .18s;--ease: cubic-bezier(.16, 1, .3, 1);--font-ui: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;--font-mono: "SFMono-Regular", Consolas, Menlo, monospace}*{box-sizing:border-box}html,body{margin:0;height:100%}body{font-family:var(--font-ui);color:var(--ink);background:var(--canvas);-webkit-font-smoothing:antialiased}.app{display:grid;grid-template-rows:auto 1fr auto;height:100vh}.topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px 20px;background:var(--surface);border-bottom:1px solid var(--line);flex-wrap:wrap}.brand{display:flex;align-items:center;gap:12px}.brand__mark{width:38px;height:38px;display:grid;place-items:center;font-size:20px;font-weight:700;color:#fff;background:linear-gradient(135deg,var(--accent),#6f7ce6);border-radius:11px;box-shadow:var(--shadow-sm)}.brand__text{display:flex;flex-direction:column;line-height:1.15}.brand__text strong{font-size:15px;letter-spacing:.2px}.brand__sub{font-size:12px;color:var(--ink-faint)}.toolbar{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.themes{display:flex;gap:6px;padding:4px;background:var(--canvas);border-radius:999px}.theme-pill{display:inline-flex;align-items:center;gap:6px;padding:5px 12px 5px 8px;font-size:13px;color:var(--ink-soft);background:transparent;border:none;border-radius:999px;cursor:pointer;transition:background var(--dur) var(--ease),color var(--dur) var(--ease)}.theme-pill:hover{color:var(--ink)}.theme-pill.is-active{color:var(--ink);background:var(--surface);box-shadow:var(--shadow-sm)}.theme-pill__dot{width:12px;height:12px;border-radius:50%;box-shadow:inset 0 0 0 1px #00000014}.accent{display:inline-flex;width:30px;height:30px;border-radius:8px;overflow:hidden;border:1px solid var(--line);cursor:pointer;box-shadow:var(--shadow-sm)}.accent input[type=color]{width:150%;height:150%;margin:-25%;border:none;padding:0;background:none;cursor:pointer}.widthtoggle{display:flex;padding:3px;background:var(--canvas);border-radius:999px}.widthtoggle button{padding:5px 12px;font-size:13px;color:var(--ink-soft);background:transparent;border:none;border-radius:999px;cursor:pointer;transition:background var(--dur) var(--ease),color var(--dur) var(--ease)}.widthtoggle button.is-active{color:var(--ink);background:var(--surface);box-shadow:var(--shadow-sm)}.select{font-family:inherit;font-size:13px;padding:7px 10px;color:var(--ink-soft);background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);cursor:pointer;transition:border-color var(--dur) var(--ease)}.select:hover{border-color:var(--ink-faint)}.select--compact{max-width:98px}.btn{font-family:inherit;font-size:13px;padding:8px 14px;border-radius:var(--radius-sm);border:1px solid transparent;cursor:pointer;transition:transform var(--dur) var(--ease),background var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease)}.btn:active{transform:translateY(1px)}.btn--ghost{color:var(--ink-soft);background:var(--surface);border-color:var(--line)}.btn--ghost:hover{color:var(--ink);border-color:var(--ink-faint)}.btn--primary{color:#fff;background:var(--accent);box-shadow:0 4px 14px #4c5bd452}.btn--primary:hover{background:#4150c4}.btn--mobile{display:none}@media(max-width:820px){.btn--mobile{display:inline-block}}.panes{display:grid;grid-template-columns:1fr 6px 1fr;overflow:hidden}.pane{overflow:auto;min-width:0}.pane--editor{background:var(--editor-bg);border-right:1px solid var(--line)}#editor{width:100%;height:100%;padding:24px 28px;border:none;outline:none;resize:none;background:transparent;color:var(--ink);font-family:var(--font-mono);font-size:14.5px;line-height:1.75;tab-size:2}.divider{cursor:col-resize;background:var(--line);transition:background var(--dur) var(--ease)}.divider:hover,.divider.is-dragging{background:var(--accent)}.pane--preview{display:flex;justify-content:center;padding:28px 20px;background:var(--canvas)}.phone{width:100%;max-width:375px;align-self:flex-start;background:var(--surface);border-radius:16px;box-shadow:var(--shadow-md);overflow:hidden;transition:max-width var(--dur) var(--ease)}.phone.is-wide{max-width:720px}.preview{padding:22px 20px}.statusbar{display:flex;align-items:center;gap:10px;padding:8px 20px;font-size:12px;color:var(--ink-faint);background:var(--surface);border-top:1px solid var(--line)}.statusbar__spacer{flex:1}.toast{position:fixed;left:50%;bottom:32px;transform:translate(-50%,20px);padding:10px 18px;font-size:13px;color:#fff;background:#23262e;border-radius:999px;box-shadow:var(--shadow-md);opacity:0;pointer-events:none;transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease);z-index:10}.toast.is-show{opacity:1;transform:translate(-50%)}.settings-overlay{position:fixed;inset:0;z-index:20;background:#14171e52;backdrop-filter:blur(2px)}.settings-panel{position:fixed;inset:0 0 0 auto;z-index:21;width:min(460px,100vw);background:var(--surface);border-left:1px solid var(--line);box-shadow:-18px 0 50px #181b2224;overflow:hidden}.settings-panel__header{height:76px;display:flex;align-items:center;justify-content:space-between;padding:14px 20px;border-bottom:1px solid var(--line)}.settings-panel__header h2{margin:2px 0 0;font-size:20px;letter-spacing:0}.settings-panel__eyebrow{display:block;color:var(--ink-faint);font-size:11px}.icon-btn{width:34px;height:34px;display:grid;place-items:center;padding:0;color:var(--ink-soft);background:var(--canvas);border:1px solid var(--line);border-radius:50%;font:inherit;font-size:22px;line-height:1;cursor:pointer}.icon-btn:hover{color:var(--ink);border-color:var(--ink-faint)}.settings-panel__body{height:calc(100vh - 76px);overflow-y:auto;overscroll-behavior:contain}.settings-section{padding:22px 20px;border-bottom:1px solid var(--line)}.settings-section__heading{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:16px}.settings-section__heading h3{margin:0 0 4px;font-size:15px;letter-spacing:0}.settings-section__heading p,.current-theme p{margin:0;color:var(--ink-faint);font-size:12px;line-height:1.55}.count-badge{flex:none;color:var(--ink-faint);font-size:11px}.count-badge strong{color:var(--ink);font-size:18px}.current-theme{display:grid;grid-template-columns:30px 1fr;gap:12px;align-items:start;padding:14px;margin-bottom:14px;background:var(--canvas);border:1px solid var(--line);border-radius:8px}.current-theme__swatch{width:30px;height:30px;border-radius:7px;box-shadow:inset 0 0 0 1px #00000014}.current-theme div{min-width:0}.current-theme div>span{display:block;color:var(--ink-faint);font-size:10px}.current-theme strong{display:block;margin:2px 0 3px;font-size:14px}.setting-tabs{display:grid;grid-template-columns:repeat(3,1fr);gap:4px;padding:3px;margin-bottom:12px;background:var(--canvas);border-radius:8px}.setting-tabs button{min-height:32px;color:var(--ink-soft);background:transparent;border:none;border-radius:6px;font:inherit;font-size:12px;cursor:pointer}.setting-tabs button.is-active{color:var(--ink);background:var(--surface);box-shadow:var(--shadow-sm)}.theme-gallery{display:grid;gap:7px}.theme-option{width:100%;min-height:58px;display:grid;grid-template-columns:26px 1fr;gap:11px;align-items:center;padding:9px 11px;text-align:left;color:var(--ink);background:var(--surface);border:1px solid var(--line);border-radius:7px;cursor:pointer;transition:border-color var(--dur) var(--ease),background var(--dur) var(--ease)}.theme-option:hover{border-color:var(--ink-faint)}.theme-option.is-active{background:var(--accent-weak);border-color:var(--accent)}.theme-option__swatch{width:26px;height:26px;border-radius:50%;box-shadow:inset 0 0 0 1px #00000017}.theme-option__copy{min-width:0}.theme-option__copy strong,.theme-option__copy small{display:block}.theme-option__copy strong{margin-bottom:3px;font-size:13px}.theme-option__copy small{overflow:hidden;color:var(--ink-faint);font-size:11px;text-overflow:ellipsis;white-space:nowrap}.setting-row,.setting-block{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:54px;padding:10px 0;border-top:1px solid var(--line)}.setting-row strong,.setting-row small,.setting-block__label strong,.setting-block__label small{display:block}.setting-row strong,.setting-block__label strong{margin-bottom:3px;font-size:13px}.setting-row small,.setting-block__label small{color:var(--ink-faint);font-size:11px}.switch{position:relative;flex:none;width:42px;height:24px}.switch input{position:absolute;inset:0;z-index:1;width:100%;height:100%;margin:0;opacity:0;cursor:pointer}.switch__track{position:absolute;inset:0;background:#c7cbd4;border-radius:999px;cursor:pointer;transition:background var(--dur) var(--ease)}.switch__track:after{content:"";position:absolute;top:3px;left:3px;width:18px;height:18px;background:#fff;border-radius:50%;box-shadow:0 1px 3px #181b223d;transition:transform var(--dur) var(--ease)}.switch input:checked+.switch__track{background:var(--accent)}.switch input:checked+.switch__track:after{transform:translate(18px)}.switch input:focus-visible+.switch__track{outline:2px solid var(--accent);outline-offset:2px}.segmented{display:grid;grid-template-columns:repeat(3,50px);gap:3px;padding:3px;background:var(--canvas);border-radius:8px}.segmented button{min-height:34px;color:var(--ink-soft);background:transparent;border:none;border-radius:6px;font:inherit;font-size:12px;cursor:pointer}.segmented button small{margin-left:2px;color:var(--ink-faint);font-size:9px}.segmented button.is-active{color:var(--ink);background:var(--surface);box-shadow:var(--shadow-sm)}.background-options{display:grid;gap:7px}.background-option{display:grid;grid-template-columns:18px 38px 1fr;gap:10px;align-items:center;min-height:58px;padding:8px 10px;border:1px solid var(--line);border-radius:7px;cursor:pointer}.background-option:has(input:checked){background:var(--accent-weak);border-color:var(--accent)}.background-option input{accent-color:var(--accent)}.background-option__preview{width:38px;height:38px;border:1px solid var(--line);border-radius:6px}.background-option__preview.is-warm{background:#fff8ee}.background-option__preview.is-grid{background-color:#fff;background-image:linear-gradient(rgba(47,54,64,.1) 1px,transparent 1px),linear-gradient(90deg,rgba(47,54,64,.1) 1px,transparent 1px);background-size:9px 9px}.background-option__preview.is-none{background-color:#fff;background-image:linear-gradient(45deg,#eceef2 25%,transparent 25%),linear-gradient(-45deg,#eceef2 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#eceef2 75%),linear-gradient(-45deg,transparent 75%,#eceef2 75%);background-position:0 0,0 6px,6px -6px,-6px 0;background-size:12px 12px}.background-option strong,.background-option small{display:block}.background-option strong{margin-bottom:3px;font-size:13px}.background-option small{color:var(--ink-faint);font-size:11px}@media(max-width:600px){.settings-panel{width:100vw}.settings-section{padding-inline:16px}}@media(max-width:820px){.panes{grid-template-columns:1fr;grid-template-rows:1fr}.divider,.pane--preview,.app.show-preview .pane--editor{display:none}.app.show-preview .pane--preview{display:flex}}