* { box-sizing: border-box; }
body { margin: 0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif; background: #f2f4f7; color: #1c2430; }
.muted { color: #6b7683; }
.alert { background: #fdecea; border: 1px solid #f5c6c2; color: #a13022; padding: 8px 12px; border-radius: 6px; margin: 10px 0; }
.btn { display: inline-block; background: #e8ebef; border: 1px solid #cdd3da; color: #1c2430; padding: 8px 14px; border-radius: 6px; text-decoration: none; cursor: pointer; font-size: 13px; font-family: inherit; }
.btn:hover { background: #dde2e8; }
.btn.primary { background: #1f6feb; border-color: #1f6feb; color: #fff; }
.btn.primary:hover { background: #1858c0; }
.btn.accent { background: #2da44e; border-color: #2da44e; color: #fff; }
.btn.accent:hover { background: #23803d; }
.btn.small { padding: 4px 10px; font-size: 12px; }
.btn.danger { background: #f85149; border-color: #f85149; color: #fff; }

/* topbar */
.topbar { background: #fff; border-bottom: 1px solid #e2e6ea; padding: 10px 18px; display: flex; align-items: center; gap: 16px; }
.topbar .brand { font-size: 15px; }
.topbar nav { margin-left: auto; display: flex; gap: 8px; }
.builder-page .topbar .title-edit { flex: 1; max-width: 420px; }
.title-edit input { width: 100%; padding: 7px 10px; border: 1px solid #cdd3da; border-radius: 6px; font-size: 14px; }

/* login */
.login-page { display: flex; align-items: center; justify-content: center; min-height: 100vh; background: #eef1f5; }
.login-box { background: #fff; padding: 28px; border-radius: 12px; width: 320px; box-shadow: 0 4px 20px rgba(0,0,0,.08); text-align: center; }
.login-box form { display: flex; flex-direction: column; gap: 10px; margin-top: 14px; }
.login-box input { padding: 9px 12px; border: 1px solid #cdd3da; border-radius: 6px; font-size: 14px; }

/* container/list */
.container { max-width: 980px; margin: 24px auto; padding: 0 16px; }
.container h2 { margin-top: 0; }
table.tlist { width: 100%; border-collapse: collapse; background: #fff; border-radius: 8px; overflow: hidden; }
table.tlist th, table.tlist td { text-align: left; padding: 9px 12px; border-bottom: 1px solid #eceff2; font-size: 14px; }
table.tlist th { background: #f7f9fb; }
.actions { text-align: right; }
.guide { background: #fff; border: 1px solid #e2e6ea; border-radius: 8px; padding: 10px 14px; margin: 12px 0 20px; }
.guide summary { cursor: pointer; font-weight: 600; font-size: 14px; }
.guide ol { margin: 10px 0 4px; padding-left: 20px; font-size: 13px; color: #39424e; }
.guide code { background: #eef1f5; padding: 1px 5px; border-radius: 4px; font-size: 12px; }
.guide pre { background: #0f1720; color: #d6e2ef; padding: 10px; border-radius: 6px; font-size: 12px; overflow-x: auto; }
.create-form { display: flex; flex-direction: column; gap: 10px; background: #fff; border: 1px solid #e2e6ea; border-radius: 8px; padding: 14px; margin-bottom: 26px; }
.create-form input[type=text], .create-form textarea { padding: 9px 12px; border: 1px solid #cdd3da; border-radius: 6px; font-size: 13px; font-family: ui-monospace, Menlo, Consolas, monospace; }
.create-form textarea { resize: vertical; }

/* builder layout */
.builder-page body, .builder-page { height: 100vh; overflow: hidden; }
.builder-page .topbar { height: 54px; }
.builder { display: flex; height: calc(100vh - 54px); }
#paramPanel { width: 292px; flex-shrink: 0; background: #fff; border-right: 1px solid #e2e6ea; overflow-y: auto; padding: 14px; }
#paramPanel h3 { margin: 0 0 8px; font-size: 14px; }
.hint { font-size: 12px; line-height: 1.5; }
#paramList { display: flex; flex-direction: column; gap: 14px; }
.param { display: flex; flex-direction: column; gap: 5px; border-top: 1px dashed #e6eaef; padding-top: 12px; }
.param label { font-size: 12.5px; font-weight: 600; }
.param .ctrl { padding: 7px 9px; border: 1px solid #cdd3da; border-radius: 6px; font-size: 13px; width: 100%; }
.param input[type=color].ctrl { padding: 2px; height: 34px; }
.param input[type=range].ctrl { padding: 0; border: none; }
.range-val { font-size: 11px; color: #6b7683; }
.stage { flex: 1; display: flex; flex-direction: column; background: #e6eaf0; }
.stage-toolbar { display: flex; align-items: center; gap: 10px; padding: 6px 12px; font-size: 12px; background: #f7f9fb; border-bottom: 1px solid #dfe4ea; }
.stage-toolbar .spacer { flex: 1; }
#preview { flex: 1; width: 100%; border: 0; background: #fff; }