/* Code Runner — elegant online IDE. Theme-aware (light default, body.dark-theme override). */

.cr-app {
    --cr-bg: #ffffff;
    --cr-bg-soft: #f6f8fa;
    --cr-bg-inset: #f0f3f6;
    --cr-panel: #ffffff;
    --cr-border: #e3e8ee;
    --cr-border-strong: #d0d7de;
    --cr-text: #1f2933;
    --cr-text-soft: #5b6773;
    --cr-text-mute: #8b95a1;
    --cr-accent: #4f46e5;
    --cr-accent-hover: #4338ca;
    --cr-accent-soft: #eef2ff;
    --cr-run: #16a34a;
    --cr-run-hover: #15803d;
    --cr-err: #dc2626;
    --cr-radius: 12px;
    --cr-shadow: 0 1px 2px rgba(16, 24, 40, .04), 0 4px 16px rgba(16, 24, 40, .06);
    --cr-mono: ui-monospace, "SFMono-Regular", "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

    max-width: 1240px;
    margin: 0 auto;
    padding: 1.25rem 1rem 2rem;
    color: var(--cr-text);
}

body.dark-theme .cr-app {
    --cr-bg: #0e1117;
    --cr-bg-soft: #161b22;
    --cr-bg-inset: #0b0f14;
    --cr-panel: #161b22;
    --cr-border: #262c36;
    --cr-border-strong: #333b46;
    --cr-text: #e6edf3;
    --cr-text-soft: #9da7b3;
    --cr-text-mute: #6e7681;
    --cr-accent: #7c83ff;
    --cr-accent-hover: #949aff;
    --cr-accent-soft: #1c2030;
    --cr-run: #2ea043;
    --cr-run-hover: #3fb950;
    --cr-err: #f85149;
    --cr-shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .35);
}

/* --- Header --- */
.cr-header {
    display: flex;
    align-items: center;
    gap: .85rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}
.cr-title {
    font-size: 1.35rem;
    font-weight: 700;
    margin: 0;
    display: flex;
    align-items: center;
    gap: .55rem;
}
.cr-lang-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px; height: 34px;
    border-radius: 9px;
    background: var(--cr-accent-soft);
    color: var(--cr-accent);
    font-weight: 700;
    font-size: .82rem;
}
.cr-toolchain {
    font-size: .78rem;
    color: var(--cr-text-mute);
    background: var(--cr-bg-soft);
    border: 1px solid var(--cr-border);
    padding: .2rem .55rem;
    border-radius: 999px;
}
.cr-lang-switch {
    margin-left: auto;
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: .5rem;
}
.cr-lang-label {
    font-size: .78rem;
    font-weight: 600;
    color: var(--cr-text-mute);
    margin: 0;
    white-space: nowrap;
}
.cr-lang-select {
    appearance: none;
    background: var(--cr-panel);
    border: 1px solid var(--cr-border-strong);
    color: var(--cr-text);
    border-radius: 9px;
    padding: .45rem 2rem .45rem .75rem;
    font-size: .9rem;
    font-weight: 600;
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%238b95a1' d='M6 8.5 2 4.5h8z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right .6rem center;
}

/* --- IDE split --- */
.cr-ide {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    min-height: 460px;
}
@media (max-width: 860px) {
    .cr-ide { grid-template-columns: 1fr; }
}
.cr-pane {
    display: flex;
    flex-direction: column;
    background: var(--cr-panel);
    border: 1px solid var(--cr-border);
    border-radius: var(--cr-radius);
    box-shadow: var(--cr-shadow);
    overflow: hidden;
    min-height: 320px;
}
.cr-pane-head {
    display: flex;
    align-items: center;
    gap: .5rem;
    padding: .5rem .7rem;
    border-bottom: 1px solid var(--cr-border);
    background: var(--cr-bg-soft);
    flex-wrap: wrap;
}
.cr-pane-title {
    font-size: .8rem;
    font-weight: 600;
    color: var(--cr-text-soft);
    letter-spacing: .02em;
    text-transform: uppercase;
}
.cr-filename {
    font-family: var(--cr-mono);
    font-size: .78rem;
    color: var(--cr-text-mute);
}
.cr-pane-actions { margin-left: auto; display: flex; gap: .4rem; align-items: center; }

/* --- Editor --- */
.cr-editor-host {
    flex: 1;
    min-height: 260px;
    overflow: hidden;
}
.cr-editor-host .cm-editor { height: 100%; font-size: 14px; }
.cr-editor-host .cm-scroller { font-family: var(--cr-mono); }
.cr-editor-host .cm-editor.cm-focused { outline: none; }

/* --- stdin --- */
.cr-stdin-wrap { border-top: 1px solid var(--cr-border); background: var(--cr-bg-soft); }
.cr-stdin-toggle {
    width: 100%;
    text-align: left;
    background: none;
    border: none;
    color: var(--cr-text-soft);
    font-size: .78rem;
    font-weight: 600;
    padding: .45rem .7rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: .4rem;
}
.cr-stdin {
    display: none;
    width: 100%;
    border: none;
    border-top: 1px solid var(--cr-border);
    background: var(--cr-bg-inset);
    color: var(--cr-text);
    font-family: var(--cr-mono);
    font-size: .82rem;
    padding: .5rem .7rem;
    min-height: 68px;
    resize: vertical;
    outline: none;
}
.cr-stdin-wrap.open .cr-stdin { display: block; }

/* --- Output --- */
.cr-output {
    flex: 1;
    margin: 0;
    padding: .75rem .85rem;
    overflow: auto;
    font-family: var(--cr-mono);
    font-size: .82rem;
    line-height: 1.5;
    white-space: pre-wrap;
    word-break: break-word;
    background: var(--cr-bg-inset);
    color: var(--cr-text);
}
.cr-output .cr-stderr { color: var(--cr-err); }
.cr-output-empty { color: var(--cr-text-mute); font-family: inherit; font-style: italic; }
.cr-statusbar {
    display: flex;
    align-items: center;
    gap: .8rem;
    padding: .4rem .7rem;
    border-top: 1px solid var(--cr-border);
    background: var(--cr-bg-soft);
    font-size: .76rem;
    color: var(--cr-text-soft);
}
.cr-status-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--cr-text-mute); display: inline-block; }
.cr-status-dot.ok { background: var(--cr-run); }
.cr-status-dot.err { background: var(--cr-err); }
.cr-status-dot.running { background: var(--cr-accent); animation: cr-pulse 1s infinite; }
@keyframes cr-pulse { 0%,100% { opacity: 1; } 50% { opacity: .35; } }

/* --- Buttons --- */
.cr-btn {
    display: inline-flex;
    align-items: center;
    gap: .4rem;
    border: 1px solid var(--cr-border-strong);
    background: var(--cr-panel);
    color: var(--cr-text);
    border-radius: 8px;
    padding: .4rem .7rem;
    font-size: .82rem;
    font-weight: 600;
    cursor: pointer;
    transition: background .12s, border-color .12s, transform .05s;
    white-space: nowrap;
}
.cr-btn:hover { background: var(--cr-bg-soft); }
.cr-btn:active { transform: translateY(1px); }
.cr-btn:disabled { opacity: .55; cursor: not-allowed; }
.cr-btn .fa-spin { margin-right: 0; }
.cr-btn-run {
    background: var(--cr-run);
    border-color: var(--cr-run);
    color: #fff;
    padding: .45rem .95rem;
}
.cr-btn-run:hover { background: var(--cr-run-hover); border-color: var(--cr-run-hover); }
.cr-btn-ai {
    background: var(--cr-accent-soft);
    border-color: transparent;
    color: var(--cr-accent);
}
.cr-btn-ai:hover { background: var(--cr-accent); color: #fff; }
.cr-btn-icon { padding: .4rem .5rem; }
.cr-kbd {
    font-size: .68rem;
    opacity: .7;
    border: 1px solid currentColor;
    border-radius: 4px;
    padding: 0 .28rem;
    margin-left: .1rem;
}

/* --- AI bar --- */
.cr-ai {
    margin-top: 1rem;
    background: var(--cr-panel);
    border: 1px solid var(--cr-border);
    border-radius: var(--cr-radius);
    box-shadow: var(--cr-shadow);
    padding: .8rem .9rem;
}
.cr-ai-row { display: flex; gap: .55rem; align-items: center; flex-wrap: wrap; }
.cr-ai-input {
    flex: 1;
    min-width: 180px;
    background: var(--cr-bg-inset);
    border: 1px solid var(--cr-border-strong);
    color: var(--cr-text);
    border-radius: 8px;
    padding: .5rem .7rem;
    font-size: .88rem;
    outline: none;
}
.cr-ai-input:focus { border-color: var(--cr-accent); }
.cr-ai-quick { display: flex; gap: .4rem; flex-wrap: wrap; }
.cr-model-select {
    appearance: none;
    background: var(--cr-bg-inset);
    border: 1px solid var(--cr-border-strong);
    color: var(--cr-text);
    border-radius: 8px;
    padding: .45rem 1.8rem .45rem .6rem;
    font-size: .82rem;
    max-width: 190px;
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%238b95a1' d='M6 8.5 2 4.5h8z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right .55rem center;
}
.cr-ai-meta {
    display: flex;
    align-items: center;
    gap: .8rem;
    margin-top: .55rem;
    font-size: .74rem;
    color: var(--cr-text-mute);
    flex-wrap: wrap;
}
.cr-credit-note i { color: var(--cr-accent); }

/* --- Quota chips --- */
.cr-quotas { display: flex; gap: .55rem; flex-wrap: wrap; margin-left: auto; }
.cr-chip {
    display: inline-flex;
    align-items: center;
    gap: .35rem;
    font-size: .72rem;
    font-weight: 600;
    color: var(--cr-text-soft);
    background: var(--cr-bg-soft);
    border: 1px solid var(--cr-border);
    border-radius: 999px;
    padding: .22rem .6rem;
}
.cr-chip b { color: var(--cr-text); }
.cr-chip.low { color: var(--cr-err); border-color: var(--cr-err); }
/* Inline AI message shown below the Fix/Comment/Optimize buttons. */
.cr-ai-msg {
    margin-top: .6rem;
    font-size: .82rem;
    line-height: 1.45;
    padding: .5rem .7rem;
    border-radius: 8px;
    background: var(--cr-bg-soft);
    border: 1px solid var(--cr-border);
    color: var(--cr-text-soft);
}
.cr-ai-msg.err { color: var(--cr-err); border-color: var(--cr-err); }
.cr-app .cr-ai-msg a { color: inherit; font-weight: 600; text-decoration: underline; }

/* .cr-app a… beats the global `.dark-theme a` link colour (0,1,1) so the chip
   keeps the accent colour in dark theme instead of the site's link blue. */
.cr-app a.cr-chip-link {
    text-decoration: none;
    color: var(--cr-accent);
    background: var(--cr-accent-soft);
    border-color: transparent;
}
.cr-app a.cr-chip-link:hover { background: var(--cr-accent); color: #fff; border-color: var(--cr-accent); }

/* --- Landing / SEO --- */
.cr-landing {
    margin-top: 2.5rem;
    display: grid;
    gap: 1.5rem;
}
.cr-landing h2 { font-size: 1.3rem; font-weight: 700; margin: 0 0 .6rem; }
.cr-landing h3 { font-size: 1.02rem; font-weight: 700; margin: 0 0 .3rem; }
.cr-landing p { color: var(--cr-text-soft); line-height: 1.65; margin: 0 0 .6rem; }
.cr-features { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1rem; }
.cr-feature {
    background: var(--cr-panel);
    border: 1px solid var(--cr-border);
    border-radius: var(--cr-radius);
    padding: 1rem;
}
.cr-feature i { color: var(--cr-accent); font-size: 1.1rem; margin-bottom: .4rem; display: block; }
.cr-crosslinks { display: flex; gap: .6rem; flex-wrap: wrap; }
.cr-crosslink {
    display: inline-flex;
    align-items: center;
    gap: .45rem;
    text-decoration: none;
    color: var(--cr-text);
    background: var(--cr-panel);
    border: 1px solid var(--cr-border-strong);
    border-radius: 999px;
    padding: .4rem .85rem;
    font-size: .85rem;
    font-weight: 600;
    transition: border-color .12s, color .12s;
}
.cr-crosslink:hover { border-color: var(--cr-accent); color: var(--cr-accent); }
.cr-crosslink i { color: var(--cr-accent); }
.cr-faq details {
    border: 1px solid var(--cr-border);
    border-radius: 10px;
    padding: .7rem .9rem;
    margin-bottom: .6rem;
    background: var(--cr-panel);
}
.cr-faq summary { font-weight: 600; cursor: pointer; }
.cr-faq p { margin-top: .5rem; }

/* --- History / details reuse --- */
.cr-run-list { display: grid; gap: .6rem; }
.cr-run-item {
    display: flex;
    align-items: center;
    gap: .8rem;
    background: var(--cr-panel);
    border: 1px solid var(--cr-border);
    border-radius: 10px;
    padding: .7rem .9rem;
    text-decoration: none;
    color: var(--cr-text);
}
.cr-run-item:hover { border-color: var(--cr-accent); }
.cr-run-snip { font-family: var(--cr-mono); font-size: .8rem; color: var(--cr-text-soft); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; flex: 1; }

.cr-toast {
    position: fixed;
    bottom: 1.2rem; left: 50%;
    transform: translateX(-50%);
    background: var(--cr-text);
    color: var(--cr-bg);
    padding: .6rem 1rem;
    border-radius: 8px;
    font-size: .85rem;
    z-index: 9999;
    box-shadow: var(--cr-shadow);
    opacity: 0;
    transition: opacity .2s;
}
.cr-toast.show { opacity: 1; }