/* ==========================================================================
   DSS book site — shared stylesheet
   Colors are taken from the book cover (coral #E63E43).
   To change the look site-wide, edit the variables below.
   ========================================================================== */

:root {
    --coral: #E63E43;          /* exact cover color: fills, rules, accents */
    --coral-text: #D12F3A;     /* slightly deeper coral for text/links (readable on white) */
    --coral-tint: #FDEEEF;     /* very light coral for hover backgrounds */
    --ink: #262626;            /* body text */
    --muted: #5C6168;          /* secondary text */
    --line: #E6E6EA;           /* hairlines and borders */
    --page: #F6F6F8;           /* page background */
    --card: #FFFFFF;           /* card background */
    --measure: 860px;          /* width of the content column */
    --radius: 12px;
    --shadow: 0 1px 2px rgba(20, 20, 30, 0.05), 0 4px 14px rgba(20, 20, 30, 0.06);
}

* { box-sizing: border-box; }

html {
    scroll-behavior: smooth;
}

[id] {
    scroll-margin-top: 76px;   /* keeps anchored headings clear of the sticky nav */
}

body {
    margin: 0;
    padding: 0;
    font-family: "Source Sans 3", "Segoe UI", "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-size: 17px;
    line-height: 1.6;
    color: var(--ink);
    background: var(--page);
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--coral-text);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

a:focus-visible {
    outline: 2px solid var(--coral);
    outline-offset: 2px;
    border-radius: 3px;
}

/* ---------- Header ---------- */

.header {
    display: flex;
    align-items: center;
    gap: 22px;
    padding: 26px max(20px, calc((100% - var(--measure)) / 2));
    background: var(--card);
    border-top: 5px solid var(--coral);
    border-bottom: 1px solid var(--line);
}

.header img {
    flex: 0 0 auto;
    width: 112px;
    height: auto;
    border-radius: 7px;
    box-shadow: 0 2px 4px rgba(20, 20, 30, 0.12), 0 8px 20px rgba(20, 20, 30, 0.14);
}

.header-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.header-content h1,
.header-content h2,
.header-content h3 {
    margin: 0;
    padding: 0;
}

.header-content h1 {
    font-size: 1.5em;
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: 0.015em;
    text-transform: uppercase;
    color: var(--coral-text);
}

.header-content h2 {
    font-weight: 400;
    color: var(--muted);
}

/* Tagline: same size, weight and spacing as the title, but gray */
.header-content h2:first-of-type {
    margin-top: 2px;
    font-size: 1.5em;
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: 0.015em;
    color: var(--muted);
}

.header-content h2:nth-of-type(2) {
    margin-top: 8px;
    font-size: 0.95em;
}

.header-content h3 .phone-only {
    display: none;
}

.header-content h3 {
    margin-top: 8px;
    max-width: 540px;
    font-size: 0.92em;
    font-weight: 400;
    line-height: 1.45;
    color: var(--muted);
}

/* ---------- Navigation ---------- */

.nav {
    position: sticky;
    top: 0;
    z-index: 10;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding: 0 max(20px, calc((100% - var(--measure)) / 2));
    background: rgba(255, 255, 255, 0.94);
    backdrop-filter: saturate(160%) blur(8px);
    -webkit-backdrop-filter: saturate(160%) blur(8px);
    border-bottom: 1px solid var(--line);
}

.nav a {
    display: inline-block;
    padding: 14px 14px 12px;
    margin-left: -14px;          /* aligns the first link's text with the content edge */
    font-size: 0.88em;
    font-weight: 600;
    letter-spacing: 0.08em;
    white-space: nowrap;
    color: var(--muted);
    border-bottom: 3px solid transparent;
}

.nav a + a {
    margin-left: 0;
}

.nav a:hover {
    color: var(--coral-text);
    text-decoration: none;
}

.nav a.active {
    color: var(--coral-text);
    border-bottom-color: var(--coral);
}

/* ---------- Page layout ---------- */

.content {
    padding: 28px 20px 56px;
}

.main-container {
    max-width: var(--measure);
    margin: 0 auto;
}

/* ---------- Cards ---------- */

.card,
.container-half {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 24px 28px;
}

.card {
    margin-bottom: 22px;
}

.container-row {
    display: flex;
    gap: 22px;
    margin-bottom: 22px;
}

.container-half {
    flex: 1;
}

.card p,
.container-half p {
    margin: 0 0 0.9em;
}

.card p:last-child,
.card ul:last-child {
    margin-bottom: 0;
}

/* Section headings */

h2.highlight {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 0 0 14px;
    padding-bottom: 12px;
    font-size: 1.05em;
    font-weight: 700;
    letter-spacing: 0.06em;
    color: var(--muted);
    border-bottom: 1px solid var(--line);
    position: relative;
}

h2.highlight a {
    color: inherit;
}

h2.highlight a:hover {
    text-decoration: none;
}

h2.highlight .icon {
    display: inline-flex;
    flex: 0 0 auto;
    color: var(--coral);
}

h2.highlight .icon svg {
    width: 22px;
    height: 22px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

/* Label above the two top boxes */

.eyebrow {
    margin: 0 0 0;
    line-height: 1.3;
    font-size: 0.92em;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--muted);
}

.lede {
    color: var(--muted);
    margin: 0 0 6px;
}

/* ---------- Lists ---------- */

.card ul,
.container-half ul {
    margin: 0;
    padding-left: 1.2em;
}

.card ul li,
.container-half ul li {
    margin-bottom: 0.4em;
}

.card ul li::marker {
    color: var(--coral);
}

.card ul li > p {
    margin-bottom: 0;
}

/* Link lists (top boxes) */

.link-list {
    list-style: none;
    padding-left: 0 !important;
}

.link-list li {
    margin: 0 !important;
    border-bottom: 1px solid var(--line);
}

.link-list li:last-child {
    border-bottom: 0;
}

.link-list li:first-child a {
    padding-top: 4px;
}

.link-list a {
    display: block;
    padding: 6px 4px;
    border-radius: 6px;
}

.link-list a:hover {
    background: var(--coral-tint);
    text-decoration: none;
}

/* Resource rows (resources page) */

.resources {
    list-style: none;
    padding-left: 0 !important;
}

.resources li {
    margin: 0 !important;
    border-bottom: 1px solid var(--line);
}

.resources li:last-child {
    border-bottom: 0;
}

.resources li {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    padding: 8px 4px;
}

.resources li > a {
    flex: 1;
    font-weight: 600;
}

.chapter-tag {
    flex: 0 0 auto;
    padding: 2px 10px;
    font-size: 0.8em;
    font-weight: 600;
    white-space: nowrap;
    color: var(--muted);
    background: var(--page);
    border: 1px solid var(--line);
    border-radius: 999px;
}

/* ---------- Praise quotes ---------- */

.quote {
    margin: 0 0 16px !important;
}

.quote .attr {
    display: inline;
    margin-left: 0.3em;
    font-size: 0.92em;
    font-weight: 600;
    color: var(--coral-text);
}

/* ---------- Mobile ---------- */

@media (max-width: 768px) {
    .container-row {
        flex-direction: column;
        gap: 18px;
    }

    .header {
        gap: 16px;
        padding-top: 20px;
        padding-bottom: 20px;
    }

    .header img {
        width: 84px;
    }

    .header-content h1 {
        font-size: 1.15em;
    }

    /* On phones, keep the header compact: the tagline is already on the cover image,
       and the publisher name is dropped so the title and authors are easy to read */
    .header-content h2:first-of-type,
    .header-content .press {
        display: none;
    }

    .header-content h2:nth-of-type(2) {
        margin-top: 6px;
    }

    /* On phones/tablets only the short opening of the description is shown,
       to keep the header easy to read */
    .header-content h3 {
        margin-top: 6px;
    }

    .header-content h3 .phone-only {
        display: inline;
    }

    .header-content h3 .desk-only {
        display: none;
    }

    .nav a {
        padding: 14px 12px 12px;
    }

    .card,
    .container-half {
        padding: 20px 18px;
    }

    .content {
        padding: 20px 14px 44px;
    }

    .resources li {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
    }
}

/* Parenthetical notes inside paragraphs */
.note {
    color: var(--muted);
}