/* Regex tester page styles built on the keycaps design system. */

/* The three columns sit in one row with a gap wide enough for the hard shadows. */
.tool-wrapper > .row {
    --bs-gutter-y: 0;
    margin: 0;
    gap: 24px;
}

/* The pattern column gets a fixed width and the two panels share the rest. */
@media (min-width: 768px) {
    .tool-wrapper > .row { flex-wrap: nowrap; }

    #inputEditor,
    #outputEditor {
        flex: 1 1 0;
        width: auto;
        max-width: none;
        min-width: 0;
    }

    .tool-wrapper .center-col {
        flex: 0 0 clamp(200px, 19vw, 250px);
        width: auto;
        max-width: none;
        padding: 0 12px 12px 0;
    }
}

/* The results panel matches the height of the test string panel. */
#outputEditor {
    --panel-c: var(--cyan);
    height: var(--panel-h);
}

/* Everything in the pattern column is centred. */
.center-col .center-actions-label { margin: 0 auto 10px; }
.center-col .center-actions-wrapper { text-align: center; }
#builderContainer { text-align: center !important; }
.center-col .center-actions-wrapper:first-child { margin-top: 2px; }

/* The pattern field uses the mono font so regex symbols line up. */
#patternInput { font-size: 0.88rem; }

/* Error sticker shown under an invalid pattern. */
.regex-error-msg {
    display: none;
    margin: -2px 0 6px;
    padding: 3px 8px;
    background: var(--red);
    color: var(--on-color);
    border: 2.5px solid var(--ink);
    box-shadow: 1.5px 1.5px 0 var(--ink);
    font-size: 0.72rem;
    font-weight: 700;
    line-height: 1.4;
    text-align: center;
    overflow-wrap: anywhere;
    transform: rotate(-1deg);
}

.regex-error-msg.visible { display: block; }

/* The library description reads like a small note stuck under the dropdown. */
.lib-desc:not(:empty) {
    margin: -2px 2px 6px 0;
    padding: 6px 9px;
    background: var(--lilac);
    color: var(--on-color);
    border: 2.5px solid var(--ink);
    box-shadow: 1.5px 1.5px 0 var(--ink);
    font-size: 0.72rem;
    font-weight: 700;
    line-height: 1.4;
    text-align: center;
    transform: rotate(-1deg);
}

/* Five flag keys fit on one row inside the narrow pattern column. */
.center-col .flag-group { justify-content: center; gap: 6px; }
.center-col .flag-toggle label { width: 32px; height: 32px; }

/* Builder group names are drawn as small ink labels. */
.token-group-label {
    display: table;
    margin: 14px auto 8px;
    padding: 1px 8px;
    background: var(--ink);
    color: var(--bg);
    font-family: var(--display-font);
    font-size: 0.68rem;
    text-transform: uppercase;
}

.token-group-label:first-child { margin-top: 0; }

.token-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px 6px;
    margin-bottom: 6px;
}

/* Each token group gets its own hover colour. */
.token-grid:nth-child(2) { --c: var(--yellow); }
.token-grid:nth-child(4) { --c: var(--pink); }
.token-grid:nth-child(6) { --c: var(--cyan); }
.token-grid:nth-child(8) { --c: var(--lilac); }

/* Builder tokens are small keycaps that sink when pressed. */
.token-btn {
    min-width: 30px;
    padding: 3px 7px;
    background: var(--paper);
    color: var(--ink);
    border: 2.5px solid var(--ink);
    border-radius: 7px;
    box-shadow: 0 1.5px 0 var(--ink);
    font: 700 0.75rem var(--mono-font);
    white-space: nowrap;
    transition: transform 0.08s, box-shadow 0.08s, background-color 0.12s;
}

.token-btn:hover { background: var(--c, var(--yellow)); color: var(--on-color); transform: translateY(0.5px); box-shadow: 0 1px 0 var(--ink); }
.token-btn:active { transform: translateY(1.5px); box-shadow: 0 0 0 var(--ink); }
.token-btn:focus-visible { outline: 3px solid var(--blue); outline-offset: 2px; }

/* Output tabs are drawn as keycaps where the open tab sinks in. */
.output-tabs {
    display: flex;
    align-items: center;
    gap: 10px;
}

.output-tab {
    position: relative;
    display: flex;
    align-items: center;
    padding: 4px 9px;
    background: var(--paper);
    color: var(--ink);
    border: 2.5px solid var(--ink);
    border-radius: 8px;
    box-shadow: 0 2px 0 var(--ink);
    font: 700 0.72rem var(--mono-font);
    text-transform: uppercase;
    white-space: nowrap;
    transition: transform 0.08s, box-shadow 0.08s, background-color 0.12s;
}

.output-tab:hover { transform: translateY(1px); box-shadow: 0 1px 0 var(--ink); }
.output-tab.active { background: var(--yellow); color: var(--on-color); transform: translateY(2px); box-shadow: 0 0 0 var(--ink), inset 0 1.5px 0 rgba(0, 0, 0, 0.2); }
.output-tab:focus-visible { outline: 3px solid var(--blue); outline-offset: 3px; }

/* The match count is a tilted sticker slapped on the corner of the matches tab. */
.badge-count {
    position: absolute;
    top: -15px;
    right: -14px;
    z-index: 2;
    padding: 0 5px;
    background: var(--paper);
    color: var(--ink);
    border: 2px solid var(--ink);
    box-shadow: 1px 1px 0 var(--ink);
    font-size: 0.6rem;
    font-weight: 700;
    line-height: 1.5;
    white-space: nowrap;
    transform: rotate(6deg);
    pointer-events: none;
}

.badge-ok { background: var(--lime); color: var(--on-color); }
.badge-none { background: var(--paper); color: var(--ink); }
.badge-err { background: var(--red); color: var(--on-color); }

/* Result bodies fill the space between the panel header and footer. */
.match-body,
.snippet-body {
    flex: 1 1 auto;
    height: auto;
    min-height: 0;
    overflow-y: auto;
}

.match-body { padding: 16px 18px 18px 14px !important; }

/* Each match is a receipt card with dashed rows. */
.match-item {
    margin-bottom: 16px;
    padding: 10px 12px;
    background: var(--paper);
    color: var(--ink);
    border: 3px solid var(--ink);
    box-shadow: 2px 2px 0 var(--ink);
    font-size: 0.8rem;
    text-align: left;
    cursor: pointer;
    transition: transform 0.08s, box-shadow 0.08s, background-color 0.12s;
}

.match-item:last-child { margin-bottom: 0; }
.match-item:hover { transform: translate(1px, 1px); box-shadow: 1px 1px 0 var(--ink); }
.match-item.active { background: var(--yellow); color: var(--on-color); transform: translate(2px, 2px); box-shadow: 0 0 0 var(--ink); }

/* The matched text is shown as a marker highlight. */
.match-item .match-val {
    display: inline;
    padding: 1px 5px;
    background: var(--yellow);
    color: var(--on-color);
    font-weight: 700;
    line-height: 1.7;
    overflow-wrap: anywhere;
    -webkit-box-decoration-break: clone;
    box-decoration-break: clone;
}

.match-item.active .match-val { background: var(--pink); outline: 2px solid var(--on-color); }

.match-item .match-meta {
    margin-top: 8px;
    padding-top: 6px;
    border-top: 2px dashed currentColor;
    font-size: 0.68rem;
    font-weight: 700;
    text-transform: uppercase;
}

.match-item .match-groups { margin-top: 6px; }

/* Capture groups are listed as dashed receipt rows. */
.group-row {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 5px 0;
    border-top: 2px dashed currentColor;
    font-size: 0.75rem;
}

.group-label {
    flex: 0 0 auto;
    min-width: 64px;
    max-width: 45%;
    padding: 0 5px;
    background: var(--c, var(--pink));
    color: var(--on-color);
    border: 2px solid var(--ink);
    font-size: 0.66rem;
    font-weight: 700;
    line-height: 1.5;
    text-align: center;
    text-transform: uppercase;
    overflow-wrap: anywhere;
    transform: rotate(-2deg);
}

/* Group labels cycle colours so each group number keeps its own colour. */
.group-row:nth-child(4n + 2) .group-label { --c: var(--cyan); }
.group-row:nth-child(4n + 3) .group-label { --c: var(--lilac); }
.group-row:nth-child(4n + 4) .group-label { --c: var(--orange); }

.group-val {
    min-width: 0;
    font-weight: 700;
    overflow-wrap: anywhere;
}

/* Empty and error states show a big tilted keycap above the message. */
.no-matches {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    height: 100%;
    padding: 2rem 1.5rem;
    font-size: 0.8rem;
    font-weight: 700;
    text-align: center;
    text-transform: uppercase;
}

.no-matches i {
    width: 64px;
    height: 64px;
    display: grid;
    place-items: center;
    background: var(--yellow);
    color: var(--on-color);
    border: 3px solid var(--ink);
    border-radius: 12px;
    box-shadow: 0 3px 0 var(--ink);
    font-size: 1.8rem;
    transform: rotate(-4deg);
}

.no-matches.match-error i { background: var(--red); }

/* Matches in the test string use the marker look from the template. */
.CodeMirror .cm-regex-match {
    background: var(--yellow);
    box-shadow: 0 -1px 0 rgba(17, 17, 17, 0.35) inset;
}

/* The selected match is pink with an ink ring like the current find hit. */
.CodeMirror .cm-regex-match-selected {
    background: var(--pink);
    outline: 2px solid var(--ink);
}

/* Dark mode uses see-through fills so the cream editor text stays readable. */
body.dark-theme .CodeMirror .cm-regex-match {
    background: rgba(255, 210, 63, 0.3);
    box-shadow: 0 -1px 0 var(--yellow) inset;
}

body.dark-theme .CodeMirror .cm-regex-match-selected {
    background: rgba(255, 111, 181, 0.4);
    box-shadow: 0 -1px 0 var(--pink) inset;
    outline: 2px solid var(--pink);
}

/* Code snippet output is shown as plain mono text. */
.snippet-body { padding: 14px 16px !important; }

.snippet-pre {
    margin: 0;
    color: var(--ink);
    font: 400 0.82rem/1.7 var(--mono-font);
    white-space: pre;
    text-align: left;
}

.snippet-pre code { color: inherit; font: inherit; }

/* Phone layout stacks the columns and lets the pattern column grow freely. */
@media (max-width: 767px) {
    .tool-wrapper .center-col { padding: 0 8px 8px 0; }
    #outputEditor { height: max(480px, 70vh); }
}