.mps-page {
    --mps-surface: rgba(255, 255, 255, 0.86);
    --mps-surface-strong: #ffffff;
    --mps-border: rgba(74, 144, 226, 0.18);
    --mps-text: #1f2937;
    --mps-muted: #64748b;
    --mps-primary: #4a90e2;
    --mps-secondary: #50e3c2;
    --mps-danger: #dc2626;
    color: var(--mps-text);
}

.mps-page .hidden {
    display: none !important;
}

.dark .mps-page {
    --mps-surface: rgba(17, 24, 39, 0.82);
    --mps-surface-strong: #111827;
    --mps-border: rgba(80, 227, 194, 0.2);
    --mps-text: #f9fafb;
    --mps-muted: #cbd5e1;
}

.mps-hero {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
    gap: 2rem;
    overflow: hidden;
    border: 1px solid var(--mps-border);
    border-radius: 1.5rem;
    padding: clamp(1.5rem, 4vw, 3rem);
    background:
        radial-gradient(circle at 14% 18%, rgba(80, 227, 194, 0.22), transparent 30%),
        radial-gradient(circle at 85% 10%, rgba(74, 144, 226, 0.22), transparent 28%),
        linear-gradient(135deg, rgba(74, 144, 226, 0.1), rgba(255, 255, 255, 0.92) 45%, rgba(80, 227, 194, 0.11));
    box-shadow: 0 24px 70px rgba(15, 23, 42, 0.12);
}

.dark .mps-hero {
    background:
        radial-gradient(circle at 14% 18%, rgba(80, 227, 194, 0.18), transparent 30%),
        radial-gradient(circle at 85% 10%, rgba(74, 144, 226, 0.2), transparent 28%),
        linear-gradient(135deg, rgba(15, 23, 42, 0.94), rgba(30, 41, 59, 0.92));
}

.mps-hero-bg {
    pointer-events: none;
    position: absolute;
    inset: 0;
}

.mps-symbol {
    position: absolute;
    font-weight: 800;
    color: var(--mps-primary);
    opacity: 0.08;
}

.mps-symbol-a {
    top: 1rem;
    left: 2rem;
    font-size: 5rem;
}

.mps-symbol-b {
    right: 15%;
    bottom: 1.5rem;
    font-size: 7rem;
    color: var(--mps-secondary);
}

.mps-symbol-c {
    top: 18%;
    right: 6%;
    font-size: 3rem;
}

.mps-hero-copy,
.mps-hero-card {
    position: relative;
    z-index: 1;
}

.mps-hero-copy {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 1.25rem;
}

.mps-hero-title {
    display: flex;
    align-items: center;
    gap: 0.875rem;
    margin: 0;
    font-size: clamp(2.25rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.02;
    color: var(--mps-text);
}

.mps-title-icon {
    display: inline-flex;
    width: 3.25rem;
    height: 3.25rem;
    align-items: center;
    justify-content: center;
    border-radius: 1rem;
    background: rgba(74, 144, 226, 0.12);
    color: var(--mps-primary);
    font-size: 1.35rem;
}

.mps-hero-lead {
    max-width: 46rem;
    margin: 0;
    color: var(--mps-muted);
    font-size: 1.05rem;
    line-height: 1.75;
}

.mps-hero-actions,
.mps-action-row,
.mps-export-row,
.mps-input-tools,
.mps-related-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.mps-primary-button,
.mps-secondary-button,
.mps-ghost-button,
.mps-example-chip,
.mps-history-button {
    display: inline-flex;
    min-height: 2.75rem;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    border-radius: 0.75rem;
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
    font-weight: 700;
    line-height: 1.1;
    transition: transform 160ms ease, border-color 160ms ease, background 160ms ease, color 160ms ease, box-shadow 160ms ease;
}

.mps-primary-button {
    border: 1px solid var(--mps-primary);
    background: linear-gradient(135deg, var(--mps-primary), var(--mps-secondary));
    color: #ffffff;
    box-shadow: 0 12px 26px rgba(74, 144, 226, 0.28);
}

.mps-secondary-button,
.mps-example-chip,
.mps-history-button {
    border: 1px solid var(--mps-border);
    background: var(--mps-surface);
    color: var(--mps-text);
}

.mps-ghost-button {
    min-height: 2rem;
    border: 0;
    background: transparent;
    color: var(--mps-primary);
    padding: 0.25rem 0.4rem;
}

.mps-primary-button:hover,
.mps-secondary-button:hover,
.mps-example-chip:hover,
.mps-history-button:hover {
    transform: translateY(-1px);
}

.mps-hero-card,
.mps-panel {
    border: 1px solid var(--mps-border);
    border-radius: 1.25rem;
    background: var(--mps-surface);
    box-shadow: 0 18px 45px rgba(15, 23, 42, 0.09);
    backdrop-filter: blur(16px);
}

.mps-hero-card {
    align-self: center;
    padding: 1.25rem;
}

.mps-card-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    border-bottom: 1px dashed var(--mps-border);
    padding: 0.9rem 0;
    color: var(--mps-muted);
    font-size: 0.9rem;
}

.mps-card-row:last-child {
    border-bottom: 0;
}

.mps-card-row strong {
    color: var(--mps-text);
    text-align: right;
}

.mps-panel {
    padding: clamp(1.125rem, 2vw, 1.5rem);
}

.mps-panel-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1rem;
}

.mps-panel-title {
    margin: 0;
    color: var(--mps-text);
    font-size: 1.15rem;
    font-weight: 800;
}

.mps-panel-subtitle,
.mps-help,
.mps-empty-note,
.mps-seo-intro p,
.mps-learning-grid p,
.mps-faq-list p {
    color: var(--mps-muted);
    font-size: 0.92rem;
    line-height: 1.65;
}

.mps-seo-intro h2 {
    margin: 0 0 0.75rem;
    color: var(--mps-text);
    font-size: 1.2rem;
    font-weight: 800;
}

.mps-workspace-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(280px, 0.38fr);
    gap: 1.25rem;
    align-items: start;
}

.mps-workspace-main,
.mps-workspace-side {
    display: grid;
    gap: 1.25rem;
}

.mps-workspace-side {
    position: sticky;
    top: 6rem;
}

.mps-type-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.75rem;
}

.mps-type-button {
    display: grid;
    gap: 0.4rem;
    min-height: 7rem;
    border: 1px solid var(--mps-border);
    border-radius: 1rem;
    background: var(--mps-surface-strong);
    color: var(--mps-text);
    padding: 1rem;
    text-align: left;
    transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease;
}

.mps-type-button i {
    color: var(--mps-primary);
}

.mps-type-button span {
    font-size: 0.95rem;
    font-weight: 800;
}

.mps-type-button small {
    color: var(--mps-muted);
    font-size: 0.78rem;
}

.mps-type-button:hover,
.mps-type-button.is-active {
    border-color: rgba(74, 144, 226, 0.55);
    box-shadow: 0 12px 26px rgba(74, 144, 226, 0.14);
    transform: translateY(-1px);
}

.mps-type-button.is-active {
    background: linear-gradient(135deg, rgba(74, 144, 226, 0.14), rgba(80, 227, 194, 0.14));
}

.mps-mode-pill {
    white-space: nowrap;
    border: 1px solid var(--mps-border);
    border-radius: 999px;
    background: rgba(74, 144, 226, 0.1);
    color: var(--mps-primary);
    padding: 0.35rem 0.7rem;
    font-size: 0.78rem;
    font-weight: 800;
}

.mps-input-section {
    display: grid;
    gap: 0.75rem;
}

.mps-input-tools {
    align-items: center;
    margin-bottom: 1rem;
}

.mps-shortcut-hint {
    color: var(--mps-muted);
    font-size: 0.82rem;
    font-weight: 700;
}

.mps-preview {
    margin-bottom: 1rem;
    overflow-x: auto;
    border: 1px solid var(--mps-border);
    border-radius: 0.9rem;
    background: rgba(74, 144, 226, 0.06);
    padding: 0.85rem 1rem;
}

.mps-preview-label {
    margin: 0 0 0.5rem;
    color: var(--mps-muted);
    font-size: 0.78rem;
    font-weight: 800;
    text-transform: uppercase;
}

.mps-preview .katex {
    color: var(--mps-text);
}

.mps-label {
    color: var(--mps-text);
    font-size: 0.9rem;
    font-weight: 800;
}

.mps-input {
    width: 100%;
    border: 1px solid var(--mps-border);
    border-radius: 0.9rem;
    background: var(--mps-surface-strong);
    color: var(--mps-text);
    padding: 0.9rem 1rem;
    font-size: 1rem;
    outline: none;
    transition: border-color 160ms ease, box-shadow 160ms ease;
}

.mps-input:focus {
    border-color: var(--mps-primary);
    box-shadow: 0 0 0 4px rgba(74, 144, 226, 0.14);
}

.mps-solution-panel {
    overflow: hidden;
}

.mps-loading-state {
    align-items: center;
    gap: 0.75rem;
    border-radius: 1rem;
    background: rgba(74, 144, 226, 0.08);
    color: var(--mps-primary);
    padding: 1rem;
    font-weight: 800;
}

.mps-spinner {
    width: 1.2rem;
    height: 1.2rem;
    border: 3px solid rgba(74, 144, 226, 0.2);
    border-top-color: var(--mps-primary);
    border-radius: 999px;
    animation: mps-spin 800ms linear infinite;
}

.mps-steps {
    display: grid;
    gap: 0.85rem;
}

.mps-step-card {
    display: grid;
    grid-template-columns: 2.25rem minmax(0, 1fr);
    gap: 0.85rem;
    border: 1px solid var(--mps-border);
    border-radius: 1rem;
    background: var(--mps-surface-strong);
    padding: 1rem;
    animation: mps-rise 220ms ease both;
}

.mps-step-index {
    display: inline-flex;
    width: 2.25rem;
    height: 2.25rem;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    background: linear-gradient(135deg, var(--mps-primary), var(--mps-secondary));
    color: #ffffff;
    font-weight: 800;
}

.mps-step-card h3 {
    margin: 0 0 0.25rem;
    color: var(--mps-text);
    font-size: 0.95rem;
    font-weight: 800;
}

.mps-step-card p {
    margin: 0.15rem 0;
    color: var(--mps-muted);
    font-size: 0.9rem;
    line-height: 1.55;
}

.mps-step-card .katex {
    color: var(--mps-text);
    font-size: 1.04em;
}

.mps-math-line {
    display: block;
    margin-top: 0.45rem;
    overflow-x: auto;
    border-radius: 0.65rem;
    background: rgba(74, 144, 226, 0.06);
    padding: 0.55rem 0.65rem;
}

.mps-final-answer {
    margin-top: 1rem;
    border-radius: 1rem;
    background: linear-gradient(135deg, rgba(74, 144, 226, 0.12), rgba(80, 227, 194, 0.12));
    padding: 1.25rem;
}

.mps-final-answer h3 {
    margin: 0 0 0.45rem;
    color: var(--mps-text);
    font-size: 1rem;
    font-weight: 800;
}

.mps-answer-value {
    color: var(--mps-primary);
    font-size: clamp(1.6rem, 4vw, 2.35rem);
    font-weight: 800;
    line-height: 1.2;
    overflow-wrap: anywhere;
}

.mps-answer-math {
    display: block;
    max-width: 100%;
    overflow-x: auto;
    color: var(--mps-primary);
    font-size: clamp(1.45rem, 3vw, 2rem);
    font-weight: 800;
}

.mps-answer-math .katex {
    color: var(--mps-primary);
}

.mps-export-row {
    margin-top: 1rem;
}

.mps-history-list,
.mps-example-list,
.mps-faq-list {
    display: grid;
    gap: 0.65rem;
}

.mps-history-button {
    justify-content: flex-start;
    width: 100%;
    text-align: left;
}

.mps-history-button span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

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

.mps-learning-grid article {
    border: 1px solid var(--mps-border);
    border-radius: 1rem;
    background: var(--mps-surface-strong);
    padding: 1rem;
}

.mps-learning-grid h3 {
    margin: 0 0 0.35rem;
    color: var(--mps-text);
    font-size: 0.95rem;
    font-weight: 800;
}

.mps-faq-list details {
    border-bottom: 1px solid var(--mps-border);
    padding: 0.75rem 0;
}

.mps-faq-list summary {
    cursor: pointer;
    color: var(--mps-text);
    font-weight: 800;
}

.mps-toast-region {
    position: fixed;
    right: 1rem;
    bottom: 1rem;
    z-index: 60;
    display: grid;
    gap: 0.65rem;
    max-width: min(24rem, calc(100vw - 2rem));
}

.mps-toast {
    border: 1px solid var(--mps-border);
    border-left: 4px solid var(--mps-primary);
    border-radius: 0.9rem;
    background: var(--mps-surface-strong);
    box-shadow: 0 16px 36px rgba(15, 23, 42, 0.18);
    color: var(--mps-text);
    padding: 0.85rem 1rem;
    font-size: 0.9rem;
    font-weight: 700;
    animation: mps-rise 180ms ease both;
}

.mps-toast.is-error {
    border-left-color: var(--mps-danger);
}

@keyframes mps-spin {
    to {
        transform: rotate(360deg);
    }
}

@keyframes mps-rise {
    from {
        opacity: 0;
        transform: translateY(0.4rem);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (prefers-reduced-motion: reduce) {
    .mps-page *,
    .mps-page *::before,
    .mps-page *::after {
        animation-duration: 1ms !important;
        scroll-behavior: auto !important;
        transition-duration: 1ms !important;
    }
}

@media (max-width: 1024px) {
    .mps-hero,
    .mps-workspace-grid {
        grid-template-columns: 1fr;
    }

    .mps-workspace-side {
        position: static;
    }

    .mps-type-grid,
    .mps-learning-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 640px) {
    .mps-hero {
        padding: 1.25rem;
    }

    .mps-hero-title {
        align-items: flex-start;
        font-size: 2.1rem;
    }

    .mps-type-grid,
    .mps-learning-grid {
        grid-template-columns: 1fr;
    }

    .mps-panel-header {
        flex-direction: column;
    }

    .mps-primary-button,
    .mps-secondary-button {
        width: 100%;
    }

    .mps-shortcut-hint {
        width: 100%;
        text-align: center;
    }
}