@import url('https://fonts.googleapis.com/css2?family=DM+Serif+Text:ital@0;1&family=Manrope:wght@400;500;600;700&display=swap');

:root {
    --color-dark: #2e5fa9;
    --color-light: #5d9fd2;
    --color-bg-start: #f8fbff;
    --color-bg-end: #e2edff;
    --color-border: rgba(93, 159, 210, 0.55);
    --color-panel: #ffffff;
    --sidebar-width: 320px;
    --content-width: 1120px;
}

* {
    box-sizing: border-box;
}

html {
    min-height: 100%;
}

body {
    min-height: 100%;
    margin: 0;
    background: linear-gradient(180deg, var(--color-bg-start) 0%, var(--color-bg-end) 100%);
    color: var(--color-dark);
    font-family: 'Manrope', 'Helvetica Now', 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--color-dark);
    font-family: 'DM Serif Text', Georgia, 'Times New Roman', serif;
    font-weight: 400;
    line-height: 1.12;
}

a {
    color: var(--color-dark);
}

a:hover,
a:focus {
    color: var(--color-light);
}

.section a,
.resource-link a {
    color: var(--color-dark);
    font-weight: 700;
    text-decoration: underline;
    text-decoration-thickness: 0.14em;
    text-underline-offset: 0.18em;
    border-radius: 0.15rem;
    padding: 0 0.08rem;
    background: linear-gradient(
        to top,
        rgba(93, 159, 210, 0.22) 42%,
        transparent 42%
    );
}

.section a:hover,
.section a:focus,
.resource-link a:hover,
.resource-link a:focus {
    color: var(--color-dark);
    text-decoration-thickness: 0.18em;
    background: rgba(93, 159, 210, 0.28);
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
    background: white;
}

th,
td {
    padding: 0.75rem;
    border: 1px solid var(--color-border);
    vertical-align: top;
}

th {
    background: rgba(226, 237, 255, 0.75);
    text-align: left;
}

.weeks-table tr.thematic-boundary td {
    border-top: 4px double var(--color-dark);
}

hr {
    border: 0;
    border-top: 1px solid var(--color-light);
}

code {
    padding: 0.08rem 0.25rem;
    border-radius: 0.25rem;
    background: rgba(46, 95, 169, 0.08);
}

pre {
    padding: 1rem;
    overflow-x: auto;
    border-radius: 0.75rem;
    background: #f4f8ff;
}

pre code {
    padding: 0;
    background: transparent;
}

.skip-link {
    position: absolute;
    left: 1rem;
    top: -4rem;
    z-index: 20;
    padding: 0.5rem 0.75rem;
    border-radius: 0.5rem;
    background: var(--color-dark);
    color: white;
}

.skip-link:focus {
    top: 1rem;
    color: white;
}

.site-shell {
    display: grid;
    grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
    min-height: 100vh;
}

.site-sidebar {
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
    padding: 1.25rem 1rem 2rem;
    border-right: 1px solid var(--color-border);
    background: rgba(248, 251, 255, 0.94);
    backdrop-filter: blur(12px);
    font-family: 'Manrope', 'Helvetica Now', 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

.sidebar-home,
.site-sidebar a,
.sidebar-disabled {
    display: block;
    border-radius: 0.65rem;
    padding: 0.55rem 0.7rem;
    color: var(--color-dark);
    font-size: 0.94rem;
    line-height: 1.25;
    text-decoration: none;
}

.site-sidebar .sidebar-home {
    font-family: 'DM Serif Text', Georgia, 'Times New Roman', serif;
    font-size: 1.35rem;
    font-weight: 400;
    line-height: 1.12;
    margin-bottom: 1rem;
}

.site-sidebar a:hover,
.site-sidebar a:focus,
.site-sidebar a.active {
    background: rgba(93, 159, 210, 0.18);
    color: var(--color-dark);
}

.sidebar-disabled {
    opacity: 0.58;
    cursor: not-allowed;
}

.sidebar-disabled small {
    display: block;
    margin-top: 0.15rem;
    font-size: 0.72rem;
    line-height: 1.25;
}

.sidebar-group {
    margin: 1.1rem 0;
}

.sidebar-group h2 {
    margin: 0 0 0.4rem;
    padding: 0 0.7rem;
    font-family: 'Manrope', 'Helvetica Now', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    font-size: 0.84rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

.sidebar-group ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

.sidebar-feedback {
    border: 1px dashed var(--color-light);
    background: rgba(93, 159, 210, 0.1);
    text-align: center;
    font-weight: 600;
}

.site-main {
    width: min(100%, var(--content-width));
    margin: 0 auto;
    padding: 1.25rem 2rem 3rem;
}

.logo-strip {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    margin: 0 0 1.25rem;
}

.logo-strip img {
    display: block;
    height: 100px;
    width: auto;
}

.logo-strip-title {
    max-width: 980px;
    color: var(--color-dark);
    font-family: 'DM Serif Text', Georgia, 'Times New Roman', serif;
    font-size: clamp(1.35rem, 2.2vw, 2.25rem);
    font-weight: 400;
    line-height: 1.12;
}

.markdown-hero {
    width: 100%;
    margin-bottom: 0.5rem;
    line-height: 0;
    text-align: center;
}

.markdown-hero img {
    display: block;
    width: var(--hero-width, 100%);
    height: auto;
    margin: 0 auto;
}

.week-title-banner {
    margin: 0.35rem 0 1rem;
}

.page-title-banner {
    margin: 0.35rem 0 1rem;
}

.week-title-banner h1,
.page-title-banner h1 {
    margin: 0;
    color: var(--color-dark);
    font-size: clamp(1.8rem, 3vw, 3rem);
    line-height: 1.08;
}

.resource-link {
    margin: -0.25rem 0 1rem;
}

.resource-link a {
    display: inline-flex;
    align-items: center;
    border: 1px solid var(--color-border);
    border-radius: 999px;
    padding: 0.45rem 0.8rem;
    background: rgba(93, 159, 210, 0.1);
    font-size: 0.92rem;
    font-weight: 700;
    text-decoration: none;
}

.pagination-shell {
    width: 100%;
}

.step-caption {
    margin: 0 0 0.35rem;
    font-size: 0.9rem;
    opacity: 0.82;
}

.progress-track {
    width: 100%;
    height: 0.55rem;
    margin-bottom: 1rem;
    overflow: hidden;
    border-radius: 999px;
    background: rgba(46, 95, 169, 0.13);
}

.progress-fill {
    width: 100%;
    height: 100%;
    border-radius: inherit;
    background: var(--color-light);
    transition: width 0.18s ease;
}

.pagination-controls {
    display: grid;
    grid-template-columns: minmax(0, 20rem) 1rem 1fr 1rem minmax(0, 20rem);
    gap: 0;
    align-items: center;
    margin-bottom: 1.25rem;
}

.control-slot-left {
    grid-column: 1;
    justify-self: start;
}

.control-slot-center {
    grid-column: 3;
    justify-self: stretch;
}

.control-slot-right {
    grid-column: 5;
    justify-self: end;
}

.pager-button,
.control-slot-center select {
    min-height: 2.5rem;
    border: 1px solid var(--color-border);
    border-radius: 0.55rem;
    color: var(--color-dark);
    font: inherit;
}

.pager-button {
    width: 20rem;
    max-width: 100%;
    padding: 0.55rem 1.5rem;
    overflow: hidden;
    background: white;
    cursor: pointer;
    text-align: center;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.pager-button:hover,
.pager-button:focus {
    background: rgba(93, 159, 210, 0.16);
}

.pager-button:disabled {
    cursor: not-allowed;
    opacity: 0.48;
}

.control-slot-center select {
    width: 100%;
    padding: 0.55rem 0.75rem;
    background: white;
}

.section {
    margin-bottom: 1.5rem;
    padding: 1.5rem;
    scroll-margin-top: 1rem;
    border: 1px solid var(--color-light);
    border-radius: 16px;
    background-color: white;
    box-shadow: 0 2px 8px rgba(46, 95, 169, 0.08);
}

.section h2:first-child {
    margin-top: 0;
    font-size: 1.35rem;
}

.section p,
.section li,
.section td,
.section th {
    text-align: justify;
}

.js .page-section {
    display: none;
}

.js .page-section.active {
    display: block;
}

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

.sidebar-toggle {
    display: none;
}

@media (max-width: 980px) {
    .site-shell {
        display: block;
    }

    .sidebar-toggle {
        position: sticky;
        top: 0.75rem;
        z-index: 30;
        display: inline-block;
        margin: 0.75rem 0 0 0.75rem;
        padding: 0.55rem 0.8rem;
        border: 1px solid var(--color-border);
        border-radius: 0.6rem;
        background: white;
        color: var(--color-dark);
        font: inherit;
    }

    .site-sidebar {
        position: fixed;
        inset: 0 auto 0 0;
        z-index: 25;
        width: min(84vw, var(--sidebar-width));
        transform: translateX(-105%);
        transition: transform 0.18s ease;
        box-shadow: 8px 0 24px rgba(46, 95, 169, 0.16);
    }

    body.sidebar-open .site-sidebar {
        transform: translateX(0);
    }

    .site-main {
        padding: 0.75rem 1rem 2.5rem;
    }

    .logo-strip {
        align-items: flex-start;
    }

    .logo-strip img {
        height: 76px;
    }

    .pagination-controls {
        grid-template-columns: 1fr;
        gap: 0.65rem;
    }

    .control-slot-left,
    .control-slot-center,
    .control-slot-right {
        grid-column: 1;
        justify-self: stretch;
    }

    .pager-button {
        width: 100%;
    }

    .markdown-hero img {
        width: 100%;
    }
}

@media (max-width: 640px) {
    .logo-strip {
        flex-direction: column;
        gap: 0.75rem;
    }

    .section {
        padding: 1rem;
    }

    th,
    td {
        padding: 0.55rem;
    }
}