:root {
    color-scheme: light;
    --color-bg: #f5f7fb;
    --color-bg-strong: #eaf0f7;
    --color-surface: #ffffff;
    --color-surface-soft: #fafdff;
    --color-text: #13201f;
    --color-muted: #59666f;
    --color-line: #dbe3ec;
    --color-accent: #14796f;
    --color-accent-strong: #0f5f58;
    --color-accent-soft: #dff5f1;
    --color-warm: #c97735;
    --shadow-card: 0 18px 42px rgba(28, 45, 64, 0.10);
    --radius: 8px;
    --space-page: clamp(16px, 5vw, 56px);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--color-bg);
    color: var(--color-text);
    font-size: 16px;
    line-height: 1.5;
}

a {
    color: inherit;
}

.site-header,
main {
    width: min(1120px, 100%);
    margin: 0 auto;
    padding-inline: var(--space-page);
}

.site-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding-block: 14px;
}

.brand {
    display: inline-flex;
    align-items: center;
    color: var(--color-text);
    text-decoration: none;
    min-width: 0;
}

.brand strong {
    display: block;
    line-height: 1.1;
    font-size: 1.18rem;
    letter-spacing: 0;
}

.site-nav {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    flex: 0 0 auto;
}

.hero {
    padding-block: 44px 36px;
}

.eyebrow,
.tool-slug {
    margin: 0 0 10px;
    color: var(--color-warm);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0;
    text-transform: uppercase;
}

h1,
h2,
h3,
p {
    overflow-wrap: anywhere;
}

h1,
h2,
h3 {
    margin: 0;
    line-height: 1.08;
}

h1 {
    max-width: 880px;
    font-size: clamp(2.35rem, 11vw, 5.2rem);
}

h2 {
    font-size: clamp(1.8rem, 7vw, 3rem);
}

h3 {
    font-size: 1.2rem;
}

.hero-copy {
    max-width: 680px;
    margin: 22px 0 0;
    color: var(--color-muted);
    font-size: 1.08rem;
}

.tool-section,
.seo-copy {
    padding-block: 28px;
}

.section-heading {
    margin-bottom: 18px;
}

.tool-grid {
    display: grid;
    gap: 14px;
}

.tool-card,
.empty-state,
.content-card {
    border: 1px solid var(--color-line);
    border-radius: var(--radius);
    background: var(--color-surface);
    box-shadow: var(--shadow-card);
}

.tool-card {
    display: grid;
    gap: 22px;
    padding: 20px;
    position: relative;
    overflow: hidden;
}

.tool-card::before {
    content: "";
    display: block;
    width: 46px;
    height: 4px;
    border-radius: 99px;
    background: var(--color-accent);
}

.tool-card p:not(.tool-slug) {
    margin: 12px 0 0;
    color: var(--color-muted);
}

.tool-link {
    display: inline-flex;
    min-height: 44px;
    align-items: center;
    justify-content: center;
    justify-self: start;
    border-radius: var(--radius);
    background: var(--color-accent);
    color: var(--color-surface);
    padding: 10px 16px;
    font-weight: 800;
    text-decoration: none;
}

.tool-link:hover,
.tool-link:focus-visible,
.button:hover,
.button:focus-visible {
    background: var(--color-accent-strong);
}

.tool-link:focus-visible,
.button:focus-visible,
.nav-link:focus-visible,
.segmented button:focus-visible,
.text-box:focus {
    outline: 3px solid var(--color-accent-soft);
    outline-offset: 2px;
}

.empty-state {
    padding: 22px;
}

.empty-state p,
.seo-copy p {
    max-width: 760px;
    color: var(--color-muted);
}

.seo-copy {
    border-top: 1px solid var(--color-line);
    margin-top: 26px;
    padding-bottom: 60px;
}

.page {
    width: min(1120px, 100%);
    margin: 0 auto;
    padding: 16px var(--space-page) 60px;
}

.nav-link {
    display: inline-flex;
    min-height: 40px;
    align-items: center;
    color: var(--color-accent-strong);
    font-weight: 800;
    text-decoration: none;
    white-space: nowrap;
}

.page-title {
    max-width: 820px;
    font-size: clamp(2.35rem, 11vw, 4.6rem);
}

.lede {
    max-width: 700px;
    margin: 18px 0 28px;
    color: var(--color-muted);
    font-size: 1.08rem;
}

.panel {
    border: 1px solid var(--color-line);
    border-radius: var(--radius);
    background: var(--color-surface);
    box-shadow: var(--shadow-card);
    margin-top: 16px;
    padding: 18px;
}

.toolbar,
.field-header {
    display: grid;
    gap: 12px;
}

.control-row {
    display: grid;
    gap: 8px;
}

.select-label {
    font-size: 0.86rem;
    font-weight: 800;
}

.select {
    min-height: 44px;
    border: 1px solid var(--color-line);
    border-radius: var(--radius);
    background: var(--color-surface-soft);
    color: var(--color-text);
    font: inherit;
    font-weight: 700;
    padding: 8px 12px;
}

.select:focus {
    border-color: var(--color-accent);
    outline: 3px solid var(--color-accent-soft);
    outline-offset: 2px;
}

.section-title {
    font-size: 1.35rem;
}

.segmented {
    display: grid;
    grid-template-columns: 1fr;
    gap: 8px;
    border-radius: var(--radius);
    background: var(--color-bg-strong);
    padding: 4px;
}

.segmented button,
.button {
    min-height: 44px;
    border: 0;
    border-radius: var(--radius);
    font: inherit;
    font-weight: 800;
    cursor: pointer;
}

.segmented button {
    background: transparent;
    color: var(--color-muted);
    padding: 10px 12px;
}

.segmented button[aria-pressed="true"] {
    background: var(--color-surface);
    color: var(--color-text);
    box-shadow: 0 1px 10px rgba(23, 32, 26, 0.08);
}

.button {
    background: var(--color-accent);
    color: var(--color-surface);
    height: 44px;
    line-height: 1;
    padding: 0 14px;
}

.button.secondary {
    background: var(--color-accent-soft);
    color: var(--color-accent-strong);
}

.button.secondary:hover,
.button.secondary:focus-visible {
    background: #ccece6;
    color: var(--color-accent-strong);
}

.io-grid {
    display: grid;
    gap: 16px;
    margin-top: 18px;
}

.label {
    display: block;
    margin-bottom: 8px;
    font-weight: 800;
}

.io-grid > div > .label,
.field-header {
    min-height: 44px;
}

.io-grid > div > .label {
    display: flex;
    align-items: center;
}

.field-header {
    margin-bottom: 8px;
}

.field-header .label {
    margin-bottom: 0;
}

.text-box {
    width: 100%;
    min-height: 190px;
    resize: vertical;
    border: 1px solid var(--color-line);
    border-radius: var(--radius);
    background: var(--color-surface-soft);
    color: var(--color-text);
    padding: 16px;
    font: inherit;
}

.text-box:focus {
    border-color: var(--color-accent);
}

.hint {
    margin: 10px 0 0;
    color: var(--color-muted);
    font-size: 0.94rem;
}

.mapping {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    margin-top: 16px;
}

.mapping-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    border: 1px solid var(--color-line);
    border-radius: var(--radius);
    background: var(--color-surface-soft);
    padding: 10px;
}

.latin,
.cyrillic {
    font-weight: 800;
}

.content-grid {
    display: grid;
    gap: 16px;
    margin-top: 16px;
}

.content-card {
    padding: 18px;
}

.calendar-summary {
    border: 1px solid var(--color-line);
    border-radius: var(--radius);
    background: var(--color-accent-soft);
    color: var(--color-accent-strong);
    font-weight: 800;
    margin-top: 18px;
    padding: 12px;
}

.calendar-grid {
    display: grid;
    gap: 14px;
    margin-top: 14px;
}

.calendar-list {
    border: 1px solid var(--color-line);
    border-radius: var(--radius);
    background: var(--color-surface-soft);
    padding: 14px;
}

.calendar-list h3 {
    margin-bottom: 10px;
}

.event-row {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
    border-top: 1px solid var(--color-line);
    padding-block: 10px;
}

.event-row:first-child {
    border-top: 0;
}

.event-row strong,
.event-row span {
    display: block;
}

.event-row span,
.empty-copy {
    color: var(--color-muted);
}

.badge {
    flex: 0 0 auto;
    border-radius: 99px;
    background: var(--color-bg-strong);
    color: var(--color-accent-strong);
    font-size: 0.78rem;
    font-weight: 800;
    padding: 4px 8px;
}

.steps {
    margin: 14px 0 0;
    padding-left: 22px;
    color: var(--color-muted);
}

.steps li + li {
    margin-top: 8px;
}

details {
    border-top: 1px solid var(--color-line);
    padding-block: 14px;
}

details:first-of-type {
    margin-top: 10px;
}

summary {
    cursor: pointer;
    font-weight: 800;
}

details p {
    margin: 10px 0 0;
    color: var(--color-muted);
}

@media (max-width: 459px) {
    .site-header {
        gap: 12px;
    }

    .brand strong {
        font-size: 1.05rem;
    }
}

@media (min-width: 760px) {
    .site-header {
        padding-block: 22px;
    }

    .hero {
        padding-block: 78px 56px;
    }

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

    .tool-card {
        min-height: 250px;
        align-content: space-between;
        padding: 26px;
    }

    .page {
        padding-top: 24px;
    }

    .toolbar,
    .field-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
    }

    .control-row {
        grid-template-columns: auto minmax(180px, 1fr) auto minmax(110px, 1fr);
        align-items: center;
    }

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

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

    .mapping {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }

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

@media (min-width: 1040px) {
    .tool-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .mapping {
        grid-template-columns: repeat(6, minmax(0, 1fr));
    }

    .calendar-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

.symbols-toolbar {
    align-items: stretch;
}

.symbol-search {
    width: 100%;
    min-height: 44px;
    border: 1px solid var(--color-line);
    border-radius: var(--radius);
    background: var(--color-surface-soft);
    padding: 10px 12px;
    font: inherit;
}

.symbol-categories {
    position: sticky;
    top: 0;
    z-index: 2;
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    padding: 10px 0;
    margin-top: 14px;
    background: var(--color-surface);
}

.chip {
    display: inline-flex;
    min-height: 36px;
    align-items: center;
    padding: 6px 10px;
    border-radius: 999px;
    border: 1px solid var(--color-line);
    text-decoration: none;
    font-weight: 700;
    font-size: 0.9rem;
}

.symbol-section h3 {
    margin: 20px 0 10px;
}

.symbol-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
}

.symbol-grid.compact {
    margin-top: 10px;
}

.symbol-tile {
    border: 1px solid var(--color-line);
    border-radius: var(--radius);
    background: var(--color-surface-soft);
    padding: 10px 6px;
    display: grid;
    gap: 4px;
    justify-items: center;
    cursor: pointer;
}

.symbol-char {
    font-size: 1.7rem;
    line-height: 1;
}

.symbol-name,
.symbol-code {
    font-size: 0.75rem;
    color: var(--color-muted);
    text-align: center;
}

.recently-copied h3 {
    margin: 16px 0 0;
}

@media (min-width: 760px) {
    .symbols-toolbar {
        align-items: center;
    }

    .symbol-search {
        max-width: 400px;
    }

    .symbol-grid {
        grid-template-columns: repeat(5, minmax(0, 1fr));
    }
}

.markdown-io-grid {
    align-items: start;
}

.markdown-input {
    min-height: 260px;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

.markdown-preview {
    min-height: 260px;
    border: 1px solid var(--color-line);
    border-radius: var(--radius);
    background: var(--color-surface-soft);
    padding: 16px;
}

.markdown-preview h2,
.markdown-preview h3,
.markdown-preview p,
.markdown-preview ul {
    margin: 0;
}

.markdown-preview h2,
.markdown-preview h3,
.markdown-preview p,
.markdown-preview ul {
    margin-top: 12px;
}

.markdown-preview h2:first-child,
.markdown-preview h3:first-child,
.markdown-preview p:first-child,
.markdown-preview ul:first-child {
    margin-top: 0;
}

.markdown-preview ul {
    padding-left: 22px;
}

.markdown-preview code {
    background: var(--color-bg-strong);
    border-radius: 4px;
    padding: 1px 5px;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

.markdown-preview a {
    color: var(--color-accent-strong);
}