/* ===== Design tokens ===== */
:root {
    color-scheme: dark;

    --color-bg: #0a0c0f;
    --color-surface: #111419;
    --color-surface-raised: #161a20;
    --color-surface-sunken: #0d1014;
    --color-surface-hover: #1c2129;
    --color-border: #232831;
    --color-border-strong: #313844;

    --color-text: #e6e9ee;
    --color-text-strong: #ffffff;
    --color-text-muted: #a3acb9;
    --color-text-subtle: #7d8794;

    /* Azure brand blue for fills; the lighter tone keeps accent text above 4.5:1 on the dark surfaces */
    --color-accent: #0078d4;
    --color-accent-hover: #1a86d9;
    --color-accent-text: #479ef5;
    --color-accent-text-hover: #75b6f7;
    --color-accent-soft: rgba(71, 158, 245, 0.12);
    --color-accent-softer: rgba(71, 158, 245, 0.06);
    --color-on-accent: #ffffff;
    --color-brand-deep: #0b2a5b;

    --color-success: #4ade80;
    --color-success-border: #166534;
    --color-success-soft: rgba(74, 222, 128, 0.08);
    --color-danger: #f87171;
    --color-danger-border: #991b1b;
    --color-danger-soft: rgba(248, 113, 113, 0.08);
    --color-warning: #f5b544;
    --color-warning-border: #92600e;
    --color-warning-soft: rgba(245, 181, 68, 0.08);

    --font-sans: "Segoe UI Variable Text", "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: "Cascadia Code", "Cascadia Mono", Consolas, ui-monospace, "SF Mono", Menlo, monospace;

    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-md: 0.9375rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.5rem;
    --text-2xl: 1.875rem;
    --text-3xl: 2.5rem;

    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;
    --space-16: 64px;

    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-full: 999px;

    --shadow-raised: 0 1px 2px rgba(0, 0, 0, 0.4), 0 4px 12px rgba(0, 0, 0, 0.25);
    --focus-ring: 0 0 0 3px rgba(71, 158, 245, 0.35);

    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --duration-fast: 150ms;

    --header-h: 60px;
    --content-max: 1200px;
    --tools-sidebar-w: 264px;
    --tools-content-max: 1080px;
}

@media (max-width: 480px) {
    :root {
        --header-h: 56px;
    }
}

/* ===== Base ===== */
html, body {
    font-family: var(--font-sans);
    line-height: 1.6;
    color: var(--color-text);
    margin: 0;
    padding: 0;
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
}

html {
    scrollbar-color: var(--color-border-strong) var(--color-bg);
}

::selection {
    background: rgba(71, 158, 245, 0.35);
    color: var(--color-text-strong);
}

input, textarea, select {
    caret-color: var(--color-accent-text);
}

:focus-visible {
    outline: 2px solid var(--color-accent-text);
    outline-offset: 2px;
}

a, .btn-link {
    color: var(--color-accent-text);
    text-decoration: none;
    text-underline-offset: 3px;
    transition: color var(--duration-fast) var(--ease-out);
}

a:hover {
    color: var(--color-accent-text-hover);
}

code {
    font-family: var(--font-mono);
    color: var(--color-accent-text);
}

.btn-primary {
    color: var(--color-on-accent);
    background-color: var(--color-accent);
    border-color: var(--color-accent);
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
    box-shadow: var(--focus-ring);
}

.content {
    padding-top: 0;
}

h1:focus {
    outline: none;
}

.valid.modified:not([type=checkbox]) {
    outline: 1px solid var(--color-success);
}

.invalid {
    outline: 1px solid var(--color-danger);
}

.validation-message {
    color: var(--color-danger);
}

/* ===== Blazor error UI ===== */
#blazor-error-ui {
    background: var(--color-surface-raised);
    bottom: 0;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.5);
    display: none;
    left: 0;
    padding: var(--space-6);
    position: fixed;
    width: 100%;
    z-index: 1000;
    border-top: 1px solid var(--color-warning-border);
    animation: slideUp 0.3s var(--ease-out);
}

@keyframes slideUp {
    from {
        transform: translateY(100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

#blazor-error-ui .error-content {
    max-width: var(--content-max);
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: var(--space-6);
    color: var(--color-text);
}

#blazor-error-ui .error-icon {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: var(--color-warning-soft);
    border-radius: var(--radius-lg);
}

#blazor-error-ui .error-icon svg {
    color: var(--color-warning);
}

#blazor-error-ui .error-message {
    flex: 1;
}

#blazor-error-ui .error-message strong {
    display: block;
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: var(--space-1);
    color: var(--color-text-strong);
}

#blazor-error-ui .error-message p {
    margin: 0;
    font-size: var(--text-md);
    color: var(--color-text-muted);
}

#blazor-error-ui .error-actions {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

#blazor-error-ui .reload-btn {
    background: var(--color-accent);
    color: var(--color-on-accent);
    padding: 10px var(--space-6);
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    transition: background-color var(--duration-fast) var(--ease-out);
    font-size: var(--text-md);
}

#blazor-error-ui .reload-btn:hover {
    background: var(--color-accent-hover);
}

#blazor-error-ui .dismiss-btn {
    background: transparent;
    border: 1px solid var(--color-border-strong);
    color: var(--color-text-muted);
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    transition: color var(--duration-fast) var(--ease-out), border-color var(--duration-fast) var(--ease-out);
}

#blazor-error-ui .dismiss-btn:hover {
    color: var(--color-text-strong);
    border-color: var(--color-text-subtle);
}

@media (max-width: 768px) {
    #blazor-error-ui {
        padding: var(--space-5);
    }

    #blazor-error-ui .error-content {
        flex-direction: column;
        text-align: center;
        gap: var(--space-4);
    }

    #blazor-error-ui .error-actions {
        flex-direction: column;
        width: 100%;
        gap: var(--space-3);
    }

    #blazor-error-ui .reload-btn {
        width: 100%;
    }

    #blazor-error-ui .dismiss-btn {
        position: absolute;
        top: var(--space-4);
        right: var(--space-4);
    }
}

.blazor-error-boundary {
    background: url(data:image/svg+xml;base64,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) no-repeat 1rem/1.8rem, #b32121;
    padding: 1rem 1rem 1rem 3.7rem;
    color: white;
}

    .blazor-error-boundary::after {
        content: "An error has occurred."
    }

.darker-border-checkbox.form-check-input {
    border-color: var(--color-text-subtle);
}

.form-floating > .form-control-plaintext::placeholder, .form-floating > .form-control::placeholder {
    color: var(--bs-secondary-color);
    text-align: end;
}

.form-floating > .form-control-plaintext:focus::placeholder, .form-floating > .form-control:focus::placeholder {
    text-align: start;
}

/* ===== Home: hero ===== */
.hero-section {
    background:
        radial-gradient(ellipse 60% 120% at 50% 0%, rgba(0, 120, 212, 0.18), transparent 70%),
        var(--color-surface);
    color: var(--color-text-strong);
    padding: var(--space-16) var(--space-5);
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: clamp(2.25rem, 5vw, 3.75rem);
    font-weight: 700;
    margin: 0;
    letter-spacing: -0.03em;
    line-height: 1.1;
    color: var(--color-text-strong);
}

.hero-subtitle {
    font-size: var(--text-lg);
    margin: var(--space-3) 0 0;
    color: var(--color-text-muted);
}

.hero-location {
    font-size: var(--text-lg);
    color: var(--color-text-muted);
    margin-bottom: var(--space-6);
}

.hero-badges {
    display: flex;
    gap: var(--space-3);
    justify-content: center;
    flex-wrap: wrap;
}

.hero-badges .badge {
    background: var(--color-accent-soft);
    color: var(--color-accent-text);
    padding: var(--space-2) var(--space-5);
    border-radius: var(--radius-full);
    font-size: var(--text-md);
    font-weight: 500;
}

/* ===== Home: container and sections ===== */
.container {
    max-width: var(--content-max);
    margin: 0 auto;
    padding: var(--space-12) var(--space-5);
    background-color: transparent;
}

section {
    margin-bottom: var(--space-16);
}

.section-title {
    font-size: var(--text-2xl);
    font-weight: 600;
    letter-spacing: -0.01em;
    margin-bottom: var(--space-8);
    text-align: center;
    color: var(--color-text-strong);
    position: relative;
    padding-bottom: var(--space-4);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 3px;
    background: var(--color-accent);
    border-radius: var(--radius-full);
}

/* ===== Home: blog ===== */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-6);
    margin-top: var(--space-10);
}

.blog-card {
    position: relative;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    padding: var(--space-6);
    border-radius: var(--radius-lg);
    transition: border-color var(--duration-fast) var(--ease-out), background-color var(--duration-fast) var(--ease-out);
}

.blog-card:hover {
    border-color: var(--color-border-strong);
    background: var(--color-surface-raised);
}

.blog-card h3 {
    font-size: var(--text-lg);
    margin-bottom: var(--space-2);
    color: var(--color-text-strong);
    font-weight: 600;
    line-height: 1.4;
    text-wrap: balance;
}

.blog-card-link {
    color: inherit;
}

/* Stretch the title link over the whole card so the card is one click target */
.blog-card-link::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
}

.blog-card:hover .blog-card-link {
    color: var(--color-accent-text);
}

.blog-card-link:focus-visible {
    outline: none;
}

.blog-card:has(.blog-card-link:focus-visible) {
    outline: 2px solid var(--color-accent-text);
    outline-offset: 2px;
}

.blog-date {
    font-size: var(--text-sm);
    color: var(--color-text-subtle);
    margin-bottom: var(--space-3);
    font-variant-numeric: tabular-nums;
}

.blog-card p {
    color: var(--color-text-muted);
    line-height: 1.6;
}

/* ===== Home: GitHub ===== */
.github-profile {
    text-align: center;
}

.github-avatar {
    display: block;
    width: 96px;
    height: 96px;
    margin: 0 auto var(--space-4);
    border-radius: 50%;
    border: 2px solid var(--color-border-strong);
}

.github-bio {
    margin: 0;
    font-size: var(--text-lg);
    color: var(--color-text-muted);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 200px));
    justify-content: center;
    gap: var(--space-4);
    margin-top: var(--space-8);
}

.stat-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-5) var(--space-4);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    color: var(--color-text-muted);
    transition: border-color var(--duration-fast) var(--ease-out), background-color var(--duration-fast) var(--ease-out);
}

.stat-card:hover {
    border-color: var(--color-border-strong);
    background: var(--color-surface-raised);
}

.stat-number {
    font-size: var(--text-2xl);
    font-weight: 700;
    color: var(--color-text-strong);
    font-variant-numeric: tabular-nums;
    line-height: 1.1;
    transition: color var(--duration-fast) var(--ease-out);
}

.stat-label {
    font-size: var(--text-sm);
}

.stat-card:hover .stat-number {
    color: var(--color-accent-text);
}

/* ===== Utilities ===== */
.text-center {
    text-align: center;
}

.mt-4 {
    margin-top: var(--space-8);
}

.view-all-link {
    color: var(--color-accent-text);
    font-weight: 600;
    font-size: var(--text-base);
    display: inline-block;
}

.view-all-link:hover {
    color: var(--color-accent-text-hover);
    text-decoration: underline;
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }

    .section-title {
        font-size: var(--text-xl);
    }

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

    .stats-grid {
        gap: var(--space-3);
    }

    .hero-section {
        padding: var(--space-10) var(--space-5);
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.75rem;
    }

    .blog-card {
        padding: var(--space-5);
    }
}

/* ===== Tools: page layout ===== */

/* The page scrolls as a whole; the sidebar sticks under the header instead of the layout owning a fixed height */
.tools-layout {
    flex: 1;
    display: flex;
    align-items: stretch;
}

.tools-sidebar {
    width: var(--tools-sidebar-w);
    flex-shrink: 0;
    background: var(--color-surface);
    border-right: 1px solid var(--color-border);
}

.tools-sidebar-inner {
    position: sticky;
    top: var(--header-h);
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    padding: var(--space-6) var(--space-3) var(--space-8);
    scrollbar-width: thin;
}

.tools-group + .tools-group {
    margin-top: var(--space-5);
}

.tools-group-header {
    padding: 0 var(--space-3) var(--space-2);
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--color-text-subtle);
}

.tools-nav-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-2) var(--space-3);
    min-height: 36px;
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: var(--text-md);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background-color var(--duration-fast) var(--ease-out), color var(--duration-fast) var(--ease-out);
}

.tools-nav-item + .tools-nav-item {
    margin-top: 2px;
}

.tools-nav-item:hover {
    background: var(--color-surface-hover);
    color: var(--color-text-strong);
}

.tools-nav-item.active {
    background: var(--color-accent-soft);
    color: var(--color-text-strong);
    font-weight: 500;
}

.tools-nav-item i {
    width: 16px;
    text-align: center;
    font-size: var(--text-sm);
    color: var(--color-text-subtle);
    transition: color var(--duration-fast) var(--ease-out);
}

.tools-nav-item:hover i {
    color: var(--color-text-muted);
}

.tools-nav-item.active i {
    color: var(--color-accent-text);
}

.tools-content {
    flex: 1;
    min-width: 0;
    padding: var(--space-10) var(--space-12) var(--space-16);
}

.tools-content > * {
    max-width: var(--tools-content-max);
}

/* ===== Tools: tool chrome ===== */
.tool-header {
    margin-bottom: var(--space-6);
}

.tool-title {
    font-size: var(--text-2xl);
    font-weight: 600;
    letter-spacing: -0.015em;
    line-height: 1.2;
    color: var(--color-text-strong);
    margin: 0 0 var(--space-2) 0;
}

.tool-description {
    color: var(--color-text-muted);
    font-size: var(--text-base);
    margin: 0;
}

.tool-container {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
}

.tool-tabs {
    display: flex;
    gap: var(--space-1);
    margin: calc(var(--space-2) * -1) 0 var(--space-6);
    border-bottom: 1px solid var(--color-border);
}

.tool-tab {
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-md);
    font-weight: 500;
    color: var(--color-text-muted);
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    transition: color var(--duration-fast) var(--ease-out), border-color var(--duration-fast) var(--ease-out);
    margin-bottom: -1px;
}

.tool-tab:hover {
    color: var(--color-text-strong);
}

.tool-tab.active {
    color: var(--color-text-strong);
    border-bottom-color: var(--color-accent);
}

/* ===== Tools: form controls ===== */
.tool-form-group {
    margin-bottom: var(--space-5);
}

.tool-label {
    display: block;
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: var(--space-2);
}

.tool-input,
.tool-textarea {
    width: 100%;
    padding: 10px var(--space-3);
    font-size: var(--text-sm);
    font-family: var(--font-mono);
    color: var(--color-text);
    background: var(--color-surface-sunken);
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-md);
    transition: border-color var(--duration-fast) var(--ease-out), box-shadow var(--duration-fast) var(--ease-out);
    box-sizing: border-box;
}

.tool-input:hover,
.tool-textarea:hover,
.tool-select:hover {
    border-color: var(--color-text-subtle);
}

.tool-input:focus,
.tool-textarea:focus,
.tool-select:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: var(--focus-ring);
}

.tool-input::placeholder,
.tool-textarea::placeholder {
    color: var(--color-text-subtle);
}

.tool-textarea {
    min-height: 140px;
    resize: vertical;
    line-height: 1.55;
}

.tool-textarea-readonly {
    background: var(--color-bg);
    cursor: default;
}

.tool-select {
    width: 100%;
    padding: 10px 40px 10px var(--space-3);
    font-size: var(--text-md);
    font-family: inherit;
    color: var(--color-text);
    background-color: var(--color-surface-sunken);
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: border-color var(--duration-fast) var(--ease-out), box-shadow var(--duration-fast) var(--ease-out);
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='none' stroke='%23a3acb9' stroke-width='1.6' viewBox='0 0 16 16'%3E%3Cpath d='M4 6l4 4 4-4'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--space-3) center;
}

.tool-select option {
    background: var(--color-surface-raised);
    color: var(--color-text);
}

/* ===== Tools: buttons ===== */
.tool-actions {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
    margin-bottom: var(--space-6);
}

.tool-button {
    padding: var(--space-2) var(--space-4);
    min-height: 36px;
    font-size: var(--text-md);
    font-family: inherit;
    font-weight: 500;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background-color var(--duration-fast) var(--ease-out), border-color var(--duration-fast) var(--ease-out), color var(--duration-fast) var(--ease-out);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
}

.tool-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.tool-button-primary {
    background: var(--color-accent);
    color: var(--color-on-accent);
}

.tool-button-primary:hover:not(:disabled) {
    background: var(--color-accent-hover);
}

.tool-button-secondary {
    background: transparent;
    color: var(--color-text);
    border-color: var(--color-border-strong);
}

.tool-button-secondary:hover:not(:disabled) {
    background: var(--color-surface-hover);
    border-color: var(--color-text-subtle);
}

.tool-button-icon {
    padding: var(--space-2);
    min-width: 32px;
    min-height: 32px;
    background: transparent;
    color: var(--color-text-muted);
    border-color: var(--color-border-strong);
}

.tool-button-icon:hover:not(:disabled) {
    color: var(--color-accent-text);
    border-color: var(--color-accent);
}

/* ===== Tools: output ===== */
.tool-output {
    background: var(--color-surface-sunken);
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-md);
    padding: var(--space-3) var(--space-4);
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100px;
    white-space: pre-wrap;
    word-break: break-word;
}

.tool-output-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-2);
}

.tool-output-label {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text);
}

.tool-output-header .tool-label {
    margin-bottom: 0;
}

.tool-copy-button {
    min-height: 28px;
    padding: 2px var(--space-3);
    font-size: var(--text-sm);
}

.tool-copy-button.copied {
    color: var(--color-success);
    border-color: var(--color-success-border);
}

.tool-hint {
    margin: var(--space-2) 0 0;
    font-size: var(--text-xs);
    color: var(--color-text-subtle);
}

kbd {
    font-family: var(--font-mono);
    font-size: 0.85em;
    padding: 1px 5px;
    border: 1px solid var(--color-border-strong);
    border-bottom-width: 2px;
    border-radius: var(--radius-sm);
    background: var(--color-surface-raised);
    color: var(--color-text-muted);
}

.visually-hidden {
    position: absolute !important;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.tool-result-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.tool-result-item {
    padding: var(--space-3) var(--space-4);
    background: var(--color-surface-sunken);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-2);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-variant-numeric: tabular-nums;
}

.tool-result-item:last-child {
    margin-bottom: 0;
}

.tool-result-number {
    width: 24px;
    height: 24px;
    background: var(--color-accent-soft);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--color-accent-text);
    flex-shrink: 0;
}

.tool-explanation {
    background: var(--color-surface-sunken);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    margin-top: var(--space-4);
}

.tool-explanation-title {
    margin-bottom: var(--space-3);
    font-weight: 600;
    font-size: var(--text-sm);
    color: var(--color-text-strong);
}

.tool-explanation-item {
    display: flex;
    gap: var(--space-4);
    padding: 10px 0;
    border-bottom: 1px solid var(--color-border);
}

.tool-explanation-item:last-child {
    border-bottom: none;
}

.tool-explanation-token {
    font-family: var(--font-mono);
    background: var(--color-accent-soft);
    color: var(--color-accent-text);
    padding: 2px var(--space-2);
    border-radius: var(--radius-sm);
    font-size: var(--text-sm);
    flex-shrink: 0;
    align-self: flex-start;
}

.tool-explanation-desc {
    color: var(--color-text-muted);
    font-size: var(--text-md);
}

.tool-match {
    background: rgba(71, 158, 245, 0.3);
    border-radius: 2px;
    padding: 1px 2px;
}

.tool-match-value {
    color: var(--color-success);
}

.tool-match-meta {
    color: var(--color-text-subtle);
    font-size: var(--text-sm);
}

.tool-match-group {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

.tool-match-group code {
    color: var(--color-accent-text);
}

/* ===== Tools: status messages ===== */
.tool-error {
    background: var(--color-danger-soft);
    border: 1px solid var(--color-danger-border);
    border-radius: var(--radius-md);
    padding: var(--space-3) var(--space-4);
    color: var(--color-danger);
    font-size: var(--text-md);
    margin: var(--space-4) 0 var(--space-5);
}

.tool-error i {
    margin-right: var(--space-2);
}

.tool-success {
    background: var(--color-success-soft);
    border: 1px solid var(--color-success-border);
    border-radius: var(--radius-md);
    padding: var(--space-3) var(--space-4);
    color: var(--color-success);
    font-size: var(--text-md);
    margin-top: var(--space-4);
}

/* A ruled-off note rather than a card, so it doesn't read as a box nested inside the tool panel */
.tool-info {
    border-top: 1px solid var(--color-border);
    padding-top: var(--space-5);
    margin-top: var(--space-6);
}

.tool-info-warning {
    border: 1px solid var(--color-warning-border);
    border-radius: var(--radius-md);
    background: var(--color-warning-soft);
    padding: var(--space-3) var(--space-4);
}

.tool-info-warning .tool-info-content {
    color: var(--color-warning);
}

.tool-info-title {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-accent-text);
    margin-bottom: var(--space-2);
}

.tool-info-content {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    line-height: 1.6;
    max-width: 75ch;
}

/* ===== Tools: layout helpers ===== */
.tool-columns {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-5);
}

.tool-form-row {
    display: flex;
    gap: var(--space-4);
    align-items: flex-end;
    margin-bottom: var(--space-5);
}

.tool-form-row .tool-form-group {
    flex: 1;
    margin-bottom: 0;
}

/* ===== Tools: narrow screens ===== */

/* The picker collapses to one horizontally scrolling row pinned under the header, so the tool itself starts within the first screen */
@media (max-width: 1024px) {
    .tools-layout {
        flex-direction: column;
    }

    .tools-sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--color-border);
        position: sticky;
        top: var(--header-h);
        z-index: 50;
    }

    .tools-sidebar-inner {
        position: static;
        max-height: none;
        display: flex;
        gap: var(--space-2);
        padding: var(--space-3) var(--space-4);
        overflow-x: auto;
        overflow-y: hidden;
        scroll-snap-type: x proximity;
        scroll-padding-inline: var(--space-4);
        scrollbar-width: none;
        mask-image: linear-gradient(to right, #000 calc(100% - 32px), transparent);
    }

    .tools-sidebar-inner::-webkit-scrollbar {
        display: none;
    }

    .tools-group {
        display: contents;
    }

    .tools-group + .tools-group {
        margin-top: 0;
    }

    .tools-group-header {
        display: none;
    }

    .tools-nav-item {
        flex-shrink: 0;
        white-space: nowrap;
        scroll-snap-align: start;
        padding: 6px var(--space-3);
        min-height: 36px;
        border: 1px solid var(--color-border-strong);
        border-radius: var(--radius-full);
        font-size: var(--text-sm);
    }

    .tools-nav-item + .tools-nav-item {
        margin-top: 0;
    }

    .tools-nav-item.active {
        border-color: var(--color-accent);
    }

    .tools-content {
        padding: var(--space-8) var(--space-6) var(--space-12);
    }

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

@media (max-width: 768px) {
    .tools-content {
        padding: var(--space-6) var(--space-4) var(--space-10);
    }

    .tool-title {
        font-size: var(--text-xl);
    }

    .tool-container {
        padding: var(--space-4);
    }

    .tool-form-row {
        flex-direction: column;
        align-items: stretch;
        gap: var(--space-4);
    }

    .tool-form-row .tool-form-group {
        width: 100%;
    }

    .tool-form-row .tool-select {
        width: 100% !important;
    }

    .tool-actions {
        flex-direction: column;
    }

    .tool-button {
        width: 100%;
    }

    .tool-copy-button {
        width: auto;
    }
}

/* ===== Not found ===== */
.not-found {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    padding: var(--space-16) var(--space-5);
    text-align: center;
}

.not-found-code {
    margin: 0;
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    color: var(--color-accent-text);
}

.not-found-title {
    margin: 0;
    font-size: var(--text-2xl);
    font-weight: 600;
    color: var(--color-text-strong);
}

.not-found-text {
    margin: 0 0 var(--space-4);
    color: var(--color-text-muted);
}