.cm-ide-page { padding-bottom: 4rem; }

.cm-ide-mast {
    padding: 2.5rem 0 2rem;
    background:
        radial-gradient(ellipse 70% 80% at 0% 0%, rgba(59, 130, 246, 0.16), transparent 55%),
        linear-gradient(180deg, #080d1a, var(--cm-bg));
    border-bottom: 1px solid var(--cm-border);
}

.cm-ide-mast-compact { padding: 1.75rem 0 1.25rem; }

.cm-ide-kicker {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    margin: 0 0 0.75rem;
    color: #93c5fd;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.cm-ide-mast h1 {
    font-family: "Source Serif 4", Georgia, serif;
    font-size: clamp(2.1rem, 4.5vw, 3.1rem);
    font-weight: 600;
    letter-spacing: -0.03em;
    color: #fff;
    margin: 0 0 0.7rem;
    background: none;
    -webkit-text-fill-color: #fff;
}

.cm-ide-lead {
    margin: 0;
    max-width: 42rem;
    color: #94a3b8;
    font-size: 1.05rem;
    line-height: 1.65;
}

.cm-ide-task {
    padding: 1rem 1.15rem;
    border: 1px solid var(--cm-border);
    border-radius: 1rem;
    background: var(--cm-surface);
    color: #e2e8f0;
    font-size: 0.92rem;
}

.cm-compiler-section { padding-top: 1.5rem; }

.cm-compiler-wrap {
    background: var(--cm-surface);
    border: 1px solid var(--cm-border);
    border-radius: 1rem;
    overflow: hidden;
}

.cm-compiler-langs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
    padding: 0.85rem 1rem;
    border-bottom: 1px solid var(--cm-border);
    background: rgba(2, 6, 23, 0.35);
}

.cm-compiler-lang {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.38rem 0.75rem;
    border-radius: 999px;
    border: 1px solid var(--cm-border);
    background: transparent;
    color: var(--cm-muted);
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: border-color 0.15s, color 0.15s, background 0.15s;
}

.cm-compiler-lang img { border-radius: 3px; }

.cm-compiler-lang em {
    font-size: 0.65rem;
    font-style: normal;
    color: #86efac;
    background: rgba(34, 197, 94, 0.15);
    padding: 0.1rem 0.35rem;
    border-radius: 999px;
}

.cm-compiler-lang em.is-editor {
    color: #cbd5e1;
    background: rgba(148, 163, 184, 0.18);
}

.cm-compiler-lang:hover,
.cm-compiler-lang.is-active {
    color: #fff;
    border-color: rgba(59, 130, 246, 0.45);
    background: rgba(59, 130, 246, 0.12);
}

.cm-compiler-workspace {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.85fr);
    min-height: 480px;
}

.cm-compiler-pane {
    display: flex;
    flex-direction: column;
    min-height: 0;
    border-right: 1px solid var(--cm-border);
}

.cm-compiler-pane-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.65rem 0.85rem;
    border-bottom: 1px solid var(--cm-border);
    background: rgba(2, 6, 23, 0.45);
    flex-wrap: wrap;
}

.cm-compiler-head-left {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    flex-wrap: wrap;
}

.cm-compiler-head-left strong {
    color: #fff;
    font-size: 0.9rem;
}

.cm-compiler-template {
    width: auto;
    min-width: 130px;
    font-size: 0.78rem;
    padding: 0.35rem 0.6rem;
}

.cm-compiler-actions { display: flex; gap: 0.4rem; }

.cm-compiler-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #64748b;
    flex-shrink: 0;
}

.cm-compiler-dot[data-state="live"] {
    background: #22c55e;
    box-shadow: 0 0 8px rgba(34, 197, 94, 0.6);
}

.cm-compiler-dot[data-state="editor"] {
    background: #94a3b8;
}

.cm-compiler-editor {
    flex: 1;
    min-height: 360px;
}

.cm-compiler-foot {
    display: flex;
    justify-content: space-between;
    gap: 0.5rem;
    padding: 0.45rem 0.85rem;
    border-top: 1px solid var(--cm-border);
    color: var(--cm-muted);
    font-size: 0.75rem;
    flex-wrap: wrap;
}

.cm-compiler-side {
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.cm-compiler-pane-out {
    border-right: 0;
    flex: 1;
}

.cm-compiler-output {
    flex: 1;
    margin: 0;
    padding: 0.85rem 1rem;
    background: #020617;
    color: #e2e8f0;
    font-family: "JetBrains Mono", monospace;
    font-size: 0.82rem;
    line-height: 1.5;
    min-height: 200px;
    white-space: pre-wrap;
    word-break: break-word;
    border: 0;
}

.cm-compiler-output.is-error { color: #fca5a5; }

.cm-compiler-runtime {
    color: var(--cm-muted);
    font-size: 0.72rem;
    font-weight: 600;
}

.cm-compiler-notice {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.65rem 1rem;
    background: rgba(59, 130, 246, 0.1);
    border-top: 1px solid var(--cm-border);
    color: #93c5fd;
    font-size: 0.84rem;
}

.cm-compiler-notice.is-editor {
    background: rgba(148, 163, 184, 0.1);
    color: #cbd5e1;
}

.cm-compiler-notice[hidden] { display: none; }

.cm-compiler-run[hidden],
[data-compiler-run][hidden] { display: none !important; }

@media (max-width: 991px) {
    .cm-compiler-workspace { grid-template-columns: 1fr; }

    .cm-compiler-pane {
        border-right: 0;
        border-bottom: 1px solid var(--cm-border);
    }

    .cm-compiler-pane-out { min-height: 220px; }
}

.cm-ide-practice {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--cm-border);
}

.cm-ide-practice-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.1rem;
}

.cm-ide-practice-head .cm-ide-kicker { margin-bottom: 0.35rem; }

.cm-ide-practice h2 {
    margin: 0;
    color: #fff;
    font-family: "Source Serif 4", Georgia, serif;
    font-size: clamp(1.45rem, 2.4vw, 1.9rem);
    font-weight: 600;
    letter-spacing: -0.02em;
}

.cm-ide-practice-meta {
    margin: 0;
    color: #93c5fd;
    font-size: 0.82rem;
    font-weight: 600;
    text-decoration: none;
}

a.cm-ide-practice-meta:hover { color: #fff; }

.cm-ide-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
    margin-bottom: 1.25rem;
}

.cm-ide-filter {
    display: inline-flex;
    align-items: center;
    padding: 0.38rem 0.85rem;
    border-radius: 999px;
    border: 1px solid var(--cm-border);
    color: #94a3b8;
    font-size: 0.8rem;
    font-weight: 600;
    text-decoration: none;
    background: transparent;
    cursor: pointer;
}

.cm-ide-filter:hover,
.cm-ide-filter.is-active {
    color: #fff;
    border-color: rgba(59, 130, 246, 0.5);
    background: rgba(59, 130, 246, 0.14);
    text-decoration: none;
}

.cm-ide-board {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1rem;
}

.cm-ide-task-card {
    display: flex;
    flex-direction: column;
    min-height: 100%;
    min-width: 0;
    padding: 1.1rem 1.05rem 1rem;
    border: 1px solid var(--cm-border);
    border-radius: 1rem;
    background:
        linear-gradient(180deg, rgba(59, 130, 246, 0.08), transparent 48%),
        var(--cm-surface);
    text-decoration: none;
    transition: border-color 0.15s, transform 0.15s;
}

.cm-ide-task-card:hover {
    border-color: rgba(59, 130, 246, 0.5);
    transform: translateY(-2px);
    text-decoration: none;
}

.cm-ide-task-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    margin-bottom: 0.7rem;
}

.cm-ide-task-lang {
    color: #93c5fd;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.cm-ide-task-card h3 {
    margin: 0 0 0.4rem;
    color: #fff;
    font-size: 1rem;
    font-weight: 650;
    letter-spacing: -0.02em;
    line-height: 1.35;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.cm-ide-task-card p {
    margin: 0;
    color: #cbd5e1;
    font-size: 0.84rem;
    line-height: 1.5;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.cm-ide-task-go {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    margin-top: 0.9rem;
    color: #93c5fd;
    font-size: 0.78rem;
    font-weight: 650;
}

.cm-ide-task-card.is-collapsed { display: none; }

.cm-ide-pager {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 0.65rem;
    margin-top: 1.35rem;
}

.cm-ide-empty {
    grid-column: 1 / -1;
    margin: 0;
    padding: 1.5rem;
    border: 1px dashed var(--cm-border);
    border-radius: 1rem;
    color: #cbd5e1;
    text-align: center;
}

.cm-ide-back {
    display: inline-block;
    margin-bottom: 0.85rem;
    color: #93c5fd;
    font-size: 0.82rem;
    font-weight: 600;
    text-decoration: none;
}

.cm-ide-back:hover { color: #fff; }

@media (max-width: 1099px) {
    .cm-ide-board { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 767px) {
    .cm-ide-board { grid-template-columns: 1fr; }
    .cm-ide-practice-head { align-items: flex-start; flex-direction: column; }
}