.btn { appearance: none; cursor: pointer; display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: 38px; padding: 0 16px; border-radius: var(--r); border: 1px solid var(--ink); background: var(--ink); color: var(--on-ink); font-weight: 600; font-size: 14px; white-space: nowrap; text-decoration: none; transition: background var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease); }
.btn:hover { background: var(--ink-hover); border-color: var(--ink-hover); }
.btn.sec { background: var(--surface); color: var(--ink); border-color: var(--control); }
.btn.sec:hover, .btn.sec.on { border-color: var(--ink); }
.btn.ghost { background: transparent; border-color: transparent; color: var(--ink-soft); }
.btn.ghost:hover, .btn.ghost.on { background: var(--paper-2); color: var(--ink); }
.btn.danger { background: var(--danger-fill); border-color: var(--danger-fill); color: var(--on-solid); }
.btn.danger:hover { background: var(--danger-fill-hover); border-color: var(--danger-fill-hover); }
.btn.sec.danger-text, .btn.ghost.danger-text { color: var(--danger); }
.btn.sm { height: 32px; padding: 0 12px; font-size: 13px; gap: 6px; }
.btn.lg { height: 46px; padding: 0 22px; font-size: 15px; }
.btn.block { width: 100%; }
.btn[disabled], .btn[aria-busy="true"] { opacity: .45; cursor: not-allowed; }
.btn svg { width: 16px; height: 16px; flex: none; }
.btn.sm svg { width: 14px; height: 14px; }
.btns { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }

.icon-btn { appearance: none; border: 0; background: none; width: 34px; height: 34px; border-radius: var(--r); display: grid; place-items: center; color: var(--ink); cursor: pointer; flex: none; padding: 0; text-decoration: none; }
.icon-btn:hover, .icon-btn.on { background: var(--paper-2); color: var(--ink); }
.icon-btn svg { width: 18px; height: 18px; }
.icon-btn.sm { width: 28px; height: 28px; }
.icon-btn.sm svg { width: 16px; height: 16px; }

.link { appearance: none; background: none; border: 0; padding: 0; cursor: pointer; color: var(--ink); font-weight: 600; font-size: inherit; text-decoration: underline; text-decoration-color: var(--line-hard); text-underline-offset: 3px; display: inline-flex; align-items: center; gap: 4px; }
.link:hover { text-decoration-color: var(--ink); }
.link.quiet { color: var(--ink-soft); }
.link svg { width: 13px; height: 13px; }
.back { display: inline-flex; align-items: center; gap: 4px; font-size: 14px; font-weight: 600; color: var(--ink-soft); text-decoration: none; }
.back:hover { color: var(--ink); }
.back svg { width: 16px; height: 16px; flex: none; }

/* The chosen option sits on a marker that slides to the next choice. */
.seg { position: relative; display: inline-flex; border: 1px solid var(--control); border-radius: var(--r); padding: 2px; gap: 2px; background: var(--surface); }
.seg-thumb { position: absolute; top: 2px; bottom: 2px; left: 0; width: 0; border-radius: 6px; background: var(--ink); pointer-events: none; }
.seg-thumb.slide { transition: transform var(--dur) var(--ease), width var(--dur) var(--ease); }
.seg button { position: relative; z-index: 1; appearance: none; border: 0; background: none; padding: 5px 12px; border-radius: 6px; font-size: 13px; font-weight: 600; color: var(--ink-soft); cursor: pointer; transition: color var(--dur) var(--ease); }
.seg button[aria-pressed="true"] { color: var(--on-ink); }
.seg button { display: inline-flex; align-items: center; gap: 5px; }
.seg button .ico { width: 14px; height: 14px; }

.field { display: flex; flex-direction: column; gap: 7px; }
.field > .seg { align-self: flex-start; }
.field-label { font-size: 14px; font-weight: 600; color: var(--ink); }
.field-hint { font-size: 13px; color: var(--ink-soft); }
.input, .textarea { width: 100%; height: 40px; padding: 0 12px; border: 1px solid var(--control); border-radius: var(--r); background: var(--surface); font-size: 15px; color: var(--ink); }
.textarea { height: auto; padding: 10px 12px; line-height: 1.55; resize: none; display: block; field-sizing: content; min-height: 64px; }
.textarea.mono { font-family: var(--mono); font-size: 13px; }
.input:focus, .textarea:focus { outline: none; border-color: var(--ink); }
.input::placeholder, .textarea::placeholder { color: var(--ink-faint); opacity: 1; }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px 18px; }
.check { display: flex; gap: 10px; align-items: flex-start; font-size: 15px; cursor: pointer; }
.check input { width: 16px; height: 16px; margin: 3px 0 0; accent-color: var(--ink); flex: none; }
.check .hint { display: block; font-size: 13px; color: var(--ink-soft); margin-top: 2px; }
.preview-line { font-size: 14px; color: var(--ink-soft); background: var(--paper-2); border-radius: var(--r); padding: 10px 12px; }

.dd { position: relative; display: block; min-width: 0; }
.dd-trigger { appearance: none; width: 100%; height: 38px; display: flex; align-items: center; gap: 10px; padding: 0 12px 0 14px; border: 1px solid var(--control); border-radius: var(--r); background: var(--surface); color: var(--ink); font-size: 14px; font-weight: 400; cursor: pointer; text-align: left; transition: border-color var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease); }
.dd-trigger:hover { border-color: var(--ink-soft); }
.dd-trigger[aria-expanded="true"] { border-color: var(--ink); box-shadow: 0 0 0 3px var(--paper-2); }
.dd-trigger .dd-p { flex: none; color: var(--ink-soft); font-weight: 400; margin-right: -4px; }
.dd-trigger .dd-v { font-weight: 600; flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.dd-trigger svg { width: 16px; height: 16px; color: var(--ink-faint); flex: none; transition: transform var(--dur-fast) var(--ease); }
.dd-trigger[aria-expanded="true"] svg { transform: rotate(180deg); }
/* Only the chevron turns: a trigger may also lead with its own icon. */
.menu-btn svg:last-child { transition: transform var(--dur-fast) var(--ease); }
.menu-btn[aria-expanded="true"] svg:last-child { transform: rotate(180deg); }
.start-ctl { display: flex; align-items: center; gap: 12px; flex: 0 1 auto; min-width: 0; }
.start-ctl > .btn, .start-ctl > .anchor { flex: none; }
.start-note { font-size: 13px; line-height: 1.4; color: var(--ink-soft); max-width: 300px; min-width: 0; text-align: right; }
.dd.sm .dd-trigger { height: 32px; font-size: 13px; padding: 0 10px 0 12px; }
.menu.dd-menu { top: calc(100% + 6px); left: 0; transform-origin: top left; min-width: 100%; max-height: 280px; overflow: auto; z-index: 70; }
.dd-menu .menu-item { justify-content: space-between; }
.dd-o { display: inline-flex; align-items: center; gap: 8px; }
.dd-o .ico { width: 16px; height: 16px; color: var(--ink-soft); }
.dd-menu .menu-item[aria-selected="true"] { font-weight: 600; }

.big-code { font-family: var(--mono); font-size: 30px; font-weight: 700; letter-spacing: .14em; color: var(--ink); font-variant-numeric: tabular-nums slashed-zero; }
.code-box { display: flex; align-items: center; gap: 12px; padding: 12px 14px; border: 1px solid var(--line-hard); border-radius: var(--r); background: var(--surface); font-family: var(--mono); font-size: 15px; }