:root {
    color-scheme: dark;
    --solver-surface: rgba(18, 23, 27, 0.78);
    --solver-surface-strong: rgba(24, 31, 36, 0.92);
    --solver-border: rgba(255, 255, 255, 0.2);
    --solver-border-soft: rgba(255, 255, 255, 0.12);
    --solver-text: #ffffff;
    --solver-text-muted: rgba(255, 255, 255, 0.72);
    --solver-accent: #7dd3fc;
    --solver-accent-strong: #2dd4bf;
    --solver-radius: 12px;
    --solver-font: Consolas, "SFMono-Regular", "Cascadia Code", "Liberation Mono", Menlo, Monaco, monospace;
}

* {
    box-sizing: border-box;
}

html,
body,
button,
input,
textarea,
#output,
mjx-container {
    font-family: var(--solver-font) !important;
}

body {
    min-height: 100vh;
    margin: 0;
    overflow-x: hidden;
    color: var(--solver-text);
    background:
        linear-gradient(rgba(8, 13, 18, 0.72), rgba(8, 13, 18, 0.9)),
        url("../../../../images/bg.jpg") center / cover fixed;
}

a {
    color: inherit;
}

button,
input,
textarea {
    font: inherit;
}

.latex-shell {
    width: min(58rem, calc(100vw - 2rem));
    margin: 0 auto;
    padding: 5rem 0 4rem;
}

.top-right-buttons {
    position: fixed;
    top: 0.75rem;
    right: 0.75rem;
    display: grid;
    grid-template-columns: repeat(2, max-content);
    gap: 0.35rem;
    max-width: calc(100vw - 1.5rem);
    padding: 0.35rem;
    z-index: 10002;
    background: rgba(8, 13, 18, 0.74);
    border: 1px solid var(--solver-border-soft);
    border-radius: 10px;
    box-shadow: 0 0.75rem 2rem rgba(0, 0, 0, 0.24);
    backdrop-filter: blur(10px);
}

.top-right-buttons a {
    display: grid;
    place-items: center;
    min-width: 0;
    min-height: 2.35rem;
    padding: 0 0.78rem;
    color: var(--solver-text);
    font-size: 0.78rem;
    line-height: 1;
    letter-spacing: 0.03rem;
    text-decoration: none;
    white-space: nowrap;
    background: rgba(255, 255, 255, 0.055);
    border: 1px solid var(--solver-border);
    border-radius: 7px;
}

.top-right-buttons a:hover {
    background: rgba(125, 211, 252, 0.14);
    border-color: rgba(125, 211, 252, 0.48);
}

.top-right-buttons a:focus-visible,
.latex-options label:focus-within,
#input:focus {
    outline: 2px solid var(--solver-accent);
    outline-offset: 3px;
}

.latex-header {
    width: 100%;
    margin: 0 0 1rem;
    padding: 2.25rem 2rem;
    text-align: center;
    background: rgba(18, 23, 27, 0.58);
    border: 1px solid var(--solver-border);
    border-radius: var(--solver-radius);
    box-shadow: 0 1rem 3rem rgba(0, 0, 0, 0.22);
    backdrop-filter: blur(8px);
}

.latex-kicker {
    margin: 0 0 0.85rem;
    color: var(--solver-accent);
    font-size: 0.78rem;
    letter-spacing: 0.16rem;
    text-transform: uppercase;
}

.latex-header h1 {
    margin: 0;
    font-size: clamp(2.1rem, 6vw, 4.2rem);
    line-height: 1;
    letter-spacing: 0.05rem;
}

.latex-header p:last-child {
    max-width: 44rem;
    margin: 1rem auto 0;
    color: var(--solver-text-muted);
    font-size: 0.95rem;
    letter-spacing: 0.05rem;
    line-height: 1.75;
}

.solver-mode,
.results-panel {
    position: relative;
    z-index: 2;
    width: 100%;
    background: var(--solver-surface);
    border: 1px solid var(--solver-border-soft);
    border-radius: var(--solver-radius);
    box-shadow: 0 1rem 3rem rgba(0, 0, 0, 0.22);
    backdrop-filter: blur(8px);
}

.latex-options {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem;
    margin: 0.75rem auto 1rem;
    padding: 1.15rem 1.25rem;
}

.latex-options label {
    display: inline-flex;
    align-items: center;
    min-height: 2.65rem;
    gap: 0.5rem;
    padding: 0 1rem;
    color: var(--solver-text-muted);
    background: rgba(255, 255, 255, 0.055);
    border: 1px solid var(--solver-border-soft);
    border-radius: 8px;
    cursor: pointer;
}

.latex-options label:hover,
.latex-options label:has(input:checked) {
    color: var(--solver-text);
    background: rgba(125, 211, 252, 0.14);
    border-color: rgba(125, 211, 252, 0.55);
}

.latex-options input {
    accent-color: var(--solver-accent-strong);
}

.latex-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
    padding: 1.35rem;
}

.latex-panel {
    display: grid;
    gap: 0.85rem;
    min-width: 0;
}

.solver-field-label {
    display: block;
    margin: 0;
    color: var(--solver-text-muted);
    font-size: 0.78rem;
    letter-spacing: 0.08rem;
    text-transform: uppercase;
}

#input,
#output {
    width: 100%;
    min-height: 22rem;
    color: var(--solver-text);
    background: rgba(255, 255, 255, 0.045);
    border: 1px solid var(--solver-border-soft);
    border-radius: 8px;
}

#input {
    padding: 1rem;
    resize: vertical;
    outline: none;
}

#input::placeholder {
    color: rgba(255, 255, 255, 0.42);
}

#input:focus {
    border-color: var(--solver-accent);
    box-shadow: 0 0 0 0.15rem rgba(125, 211, 252, 0.16);
}

#output {
    overflow: auto;
    padding: 1rem;
    white-space: pre-wrap;
    word-break: break-word;
    background: rgba(0, 0, 0, 0.18);
}

#output:empty::before {
    color: var(--solver-text-muted);
    content: "预览会显示在这里。";
}

@media screen and (max-width: 736px) {
    .latex-shell {
        width: calc(100% - 1rem);
        max-width: 100%;
        padding-top: 5.75rem;
    }

    .top-right-buttons {
        left: 0.75rem;
        right: 0.75rem;
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .top-right-buttons a {
        width: 100%;
        min-height: 2.25rem;
        padding: 0 0.35rem;
        font-size: 0.72rem;
    }

    .latex-header {
        padding: 1.75rem 1rem;
    }

    .latex-header h1 {
        font-size: clamp(1.35rem, 6.8vw, 1.62rem);
        line-height: 1.18;
        overflow-wrap: anywhere;
    }

    .latex-header p:last-child {
        font-size: 0.85rem;
        letter-spacing: 0.03rem;
    }

    .latex-options,
    .latex-grid {
        padding: 1rem;
    }

    .latex-options {
        display: grid;
        grid-template-columns: 1fr;
    }

    .latex-grid {
        grid-template-columns: 1fr;
    }

    .latex-options label {
        width: 100%;
    }

    #input,
    #output {
        min-height: 220px;
    }
}