/* ==========================================================================
   Editorial layout for the two template-derived CYS401 breakdowns
   (chapters 1 and 2). Restyles the existing class names — no markup churn.
   Per-page hue comes from --ch-h / --ch-h2 set inline on :root.
   Light and dark are both first-class here; nothing is derived.
   ========================================================================== */

:root {
    --ch-h: 212;
    /* chapter hue, overridden per page */
    --ch-h2: 190;
    /* secondary hue */

    --ink: #16202e;
    --ink-2: #4a5a70;
    --ink-3: #7b8a9e;
    --paper: #f2f5f9;
    --card: #ffffff;
    --card-2: #f7f9fc;
    --line: #dde5ef;
    --line-2: #eaf0f7;

    --accent: hsl(var(--ch-h) 72% 40%);
    --accent-2: hsl(var(--ch-h2) 70% 36%);
    --accent-ink: hsl(var(--ch-h) 78% 30%);
    --accent-wash: hsl(var(--ch-h) 72% 40% / .07);
    --accent-line: hsl(var(--ch-h) 72% 40% / .28);

    --ok: #0f7a52;
    --ok-wash: #0f7a5214;
    --warn: #9a6407;
    --warn-wash: #9a640714;
    --bad: #b3243f;
    --bad-wash: #b3243f14;

    --shadow: 0 1px 2px hsl(var(--ch-h) 30% 20% / .05), 0 12px 32px hsl(var(--ch-h) 30% 20% / .07);
    --r: 16px;
    --sans: 'Inter', ui-sans-serif, system-ui, -apple-system, sans-serif;
    --serif: 'Fraunces', 'Iowan Old Style', Georgia, serif;
    --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}

html[data-theme="dark"] {
    --ink: #e7edf7;
    --ink-2: #9fb0c6;
    --ink-3: #71829a;
    --paper: #070b12;
    --card: #101825;
    --card-2: #0c131e;
    --line: #1f2c3f;
    --line-2: #17222f;

    --accent: hsl(var(--ch-h) 85% 66%);
    --accent-2: hsl(var(--ch-h2) 80% 62%);
    --accent-ink: hsl(var(--ch-h) 90% 76%);
    --accent-wash: hsl(var(--ch-h) 85% 66% / .11);
    --accent-line: hsl(var(--ch-h) 85% 66% / .32);

    --ok: #3fcf8e;
    --ok-wash: #3fcf8e1a;
    --warn: #e0a83c;
    --warn-wash: #e0a83c1a;
    --bad: #ff6b83;
    --bad-wash: #ff6b831a;

    --shadow: 0 1px 2px #0006, 0 16px 40px #00000059;
}

/* ---------------------------------------------------------------- base --- */
body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: var(--sans);
    font-size: 16px;
    line-height: 1.65;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 clamp(16px, 4vw, 36px) 96px;
}

/* ---------------------------------------------------------------- hero --- */
.header {
    position: relative;
    margin: 0 0 14px;
    padding: clamp(44px, 8vw, 96px) clamp(20px, 4vw, 44px) clamp(36px, 5vw, 60px);
    background:
        radial-gradient(120% 140% at 100% 0%, hsl(var(--ch-h2) 70% 45% / .22), transparent 58%),
        radial-gradient(100% 130% at 0% 10%, hsl(var(--ch-h) 78% 45% / .28), transparent 60%),
        linear-gradient(160deg, hsl(var(--ch-h) 55% 16%), hsl(var(--ch-h) 62% 9%));
    color: #fff;
    border-radius: 0 0 26px 26px;
    overflow: hidden;
}

.header::after {
    content: '';
    position: absolute;
    inset: auto 0 0 0;
    height: 3px;
    background: linear-gradient(90deg, hsl(var(--ch-h) 85% 62%), hsl(var(--ch-h2) 85% 58%), transparent);
}

.header h1 {
    font-family: var(--serif);
    font-weight: 700;
    font-size: clamp(30px, 5.4vw, 54px);
    line-height: 1.04;
    letter-spacing: -.025em;
    margin: 0 0 14px;
    max-width: 20ch;
}

.header p {
    margin: 0;
    max-width: 62ch;
    font-size: clamp(15px, 1.6vw, 17px);
    color: #ffffffcc;
}

.header .subtitle,
.header>p:first-of-type {
    color: #ffffffd9;
}

/* ------------------------------------------------------------- sections -- */
.section {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--r);
    box-shadow: var(--shadow);
    padding: clamp(22px, 3.4vw, 40px);
    margin: 22px 0 0;
    counter-increment: sec;
    position: relative;
}

.section>h2 {
    font-family: var(--serif);
    font-size: clamp(21px, 2.7vw, 29px);
    font-weight: 700;
    letter-spacing: -.02em;
    line-height: 1.2;
    margin: 0 0 22px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--line);
    display: flex;
    align-items: center;
    gap: 13px;
}

.section>h2::before {
    content: counter(sec, decimal-leading-zero);
    font-family: var(--mono);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: .04em;
    color: var(--accent);
    background: var(--accent-wash);
    border: 1px solid var(--accent-line);
    border-radius: 8px;
    padding: 5px 9px;
    flex: 0 0 auto;
}

body {
    counter-reset: sec;
}

.section h3 {
    font-size: 17px;
    font-weight: 700;
    letter-spacing: -.01em;
    color: var(--accent-ink);
    margin: 30px 0 12px;
}

.section h4,
.section h5 {
    font-size: 15px;
    font-weight: 700;
    color: var(--ink);
    margin: 0 0 8px;
}

.section p {
    margin: 0 0 14px;
    color: var(--ink-2);
}

.section>p:last-child {
    margin-bottom: 0;
}

.section strong {
    color: var(--ink);
    font-weight: 650;
}

.icon {
    font-size: .95em;
    filter: saturate(.9);
}

ul,
ol {
    margin: 0 0 14px;
    padding-left: 20px;
    color: var(--ink-2);
}

li {
    margin-bottom: 7px;
}

li::marker {
    color: var(--accent);
}

/* ------------------------------------------------------------- toc ------- */
.table-of-contents {
    background: var(--card-2);
    border: 1px solid var(--line);
    border-radius: var(--r);
    padding: 24px clamp(20px, 3vw, 30px);
    margin-top: 22px;
}

.table-of-contents h2 {
    font-family: var(--serif);
    font-size: 20px;
    margin: 0 0 14px;
}

.table-of-contents ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 8px;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
}

.table-of-contents li {
    margin: 0;
}

.table-of-contents a {
    display: block;
    padding: 10px 13px;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: var(--card);
    color: var(--ink);
    text-decoration: none;
    font-size: 14px;
    transition: border-color .18s, transform .18s, color .18s;
}

.table-of-contents a:hover {
    border-color: var(--accent-line);
    color: var(--accent-ink);
    transform: translateX(3px);
}

/* ------------------------------------------------------------- grids ---- */
.grid,
.components-grid,
.threat-grid,
.countermeasure-grid,
.cia-triad,
.dimensions {
    display: grid;
    gap: 14px;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    margin: 0 0 16px;
    align-items: stretch;
}

.card,
.component-card,
.cia-element,
.dimension,
.aaa-element,
.threat-item,
.countermeasure-item,
.lifecycle-column,
.security-layers {
    background: var(--card-2);
    border: 1px solid var(--line);
    border-radius: 13px;
    padding: 18px 19px;
    position: relative;
    transition: border-color .18s ease, transform .18s ease, box-shadow .18s ease;
}

.card:hover,
.component-card:hover,
.cia-element:hover,
.dimension:hover,
.aaa-element:hover,
.threat-item:hover,
.countermeasure-item:hover {
    border-color: var(--accent-line);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.card h3,
.card h4,
.component-card h5,
.cia-element h4,
.dimension h5,
.aaa-element h4,
.threat-item h4,
.countermeasure-item h4 {
    color: var(--accent-ink);
    margin: 0 0 9px;
    font-size: 15.5px;
    font-weight: 700;
}

.card p,
.component-card p,
.cia-element p,
.dimension p,
.threat-item p,
.countermeasure-item p {
    color: var(--ink-2);
    font-size: 14.4px;
    margin: 0 0 8px;
}

.card ul,
.cia-element ul,
.dimension ul,
.aaa-element ul {
    font-size: 14.2px;
    margin-bottom: 0;
}

/* the CIA cards get a coloured spine so the triad reads as a set */
.cia-element {
    border-top: 3px solid var(--accent);
}

.cia-element:nth-child(2) {
    border-top-color: var(--accent-2);
}

.cia-element:nth-child(3) {
    border-top-color: var(--ok);
}

/* ---------------------------------------------------------- callouts ---- */
.tip-box,
.example-box,
.warning-box,
.danger-box,
.success-box,
.highlight-box {
    border: 1px solid var(--line);
    border-left: 3px solid var(--accent);
    border-radius: 12px;
    padding: 16px 18px;
    margin: 18px 0;
    background: var(--accent-wash);
}

.tip-box h4,
.example-box h4,
.warning-box h4,
.danger-box h4,
.success-box h4,
.highlight-box h4 {
    color: var(--accent-ink);
}

.tip-box p,
.example-box p,
.warning-box p,
.danger-box p,
.success-box p,
.highlight-box p {
    color: var(--ink);
    margin-bottom: 0;
}

.tip-box p+p,
.example-box p+p,
.highlight-box p+p {
    margin-top: 9px;
}

.warning-box {
    border-left-color: var(--warn);
    background: var(--warn-wash);
}

.warning-box h4 {
    color: var(--warn);
}

.danger-box {
    border-left-color: var(--bad);
    background: var(--bad-wash);
}

.danger-box h4 {
    color: var(--bad);
}

.success-box {
    border-left-color: var(--ok);
    background: var(--ok-wash);
}

.success-box h4 {
    color: var(--ok);
}

.tip-box {
    border-left-color: var(--warn);
    background: var(--warn-wash);
}

.tip-box h4 {
    color: var(--warn);
}

/* ------------------------------------------------------------ layers ---- */
.security-layers {
    padding: 6px 8px;
    background: transparent;
    border: none;
}

.layer-item {
    background: var(--card-2);
    border: 1px solid var(--line);
    border-left: 3px solid var(--accent);
    border-radius: 11px;
    padding: 13px 16px;
    margin: 9px 0;
    font-size: 14.5px;
    color: var(--ink-2);
    transition: transform .18s ease, border-color .18s ease, background .18s ease;
}

.layer-item:hover {
    transform: translateX(5px);
    border-color: var(--accent-line);
    background: var(--accent-wash);
}

.layer-item strong {
    color: var(--accent-ink);
}

.layer-item:nth-child(even) {
    border-left-color: var(--accent-2);
}

/* --------------------------------------------------------- lifecycle ---- */
.lifecycle-column h4 {
    text-align: center;
    color: var(--accent-ink);
    margin-bottom: 14px;
}

.lifecycle-phase {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 9px;
    padding: 11px 13px;
    margin: 9px 0;
    text-align: center;
    font-size: 14px;
    color: var(--ink-2);
    transition: all .18s ease;
}

.lifecycle-phase:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
    transform: scale(1.02);
}

html[data-theme="dark"] .lifecycle-phase:hover {
    color: #08111c;
}

/* -------------------------------------------------------------- quiz ---- */
.quiz-question {
    background: var(--card-2);
    border: 1px solid var(--line);
    border-radius: 13px;
    padding: 20px 22px;
    margin: 18px 0;
}

.quiz-question h4 {
    color: var(--ink);
    margin-bottom: 14px;
    font-size: 15.5px;
}

.quiz-options {
    list-style: none;
    padding: 0;
    margin: 0;
}

.quiz-options li {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 9px;
    padding: 11px 14px;
    margin: 8px 0;
    font-size: 14.4px;
    color: var(--ink-2);
    transition: all .16s ease;
}

.quiz-options li:hover {
    border-color: var(--accent-line);
    color: var(--ink);
}

.quiz-options li.correct {
    background: var(--ok-wash);
    border-color: var(--ok);
    color: var(--ink);
    font-weight: 600;
}

.quiz-options li.correct::after {
    content: '  ✓';
    color: var(--ok);
    font-weight: 700;
}

/* ------------------------------------------------------------ badges ---- */
.badge {
    display: inline-block;
    font-family: var(--mono);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: .03em;
    padding: 3px 9px;
    border-radius: 999px;
    border: 1px solid currentColor;
    margin-right: 6px;
    vertical-align: 1px;
}

.badge-primary {
    color: var(--accent);
    background: var(--accent-wash);
}

.badge-success {
    color: var(--ok);
    background: var(--ok-wash);
}

.badge-warning {
    color: var(--warn);
    background: var(--warn-wash);
}

.badge-danger {
    color: var(--bad);
    background: var(--bad-wash);
}

.highlight {
    background: linear-gradient(180deg, transparent 58%, var(--accent-wash) 58%);
    border-bottom: 1px solid var(--accent-line);
    color: var(--ink);
    padding: 0 3px;
    font-weight: 600;
    border-radius: 2px;
}

/* ------------------------------------------------------------- tables --- */
table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14.3px;
    margin: 0 0 14px;
}

th {
    text-align: left;
    font-family: var(--mono);
    font-size: 11.5px;
    letter-spacing: .05em;
    text-transform: uppercase;
    color: var(--accent-ink);
    background: var(--accent-wash);
    padding: 11px 13px;
    border-bottom: 1px solid var(--accent-line);
}

td {
    padding: 11px 13px;
    border-bottom: 1px solid var(--line-2);
    color: var(--ink-2);
}

tr:last-child td {
    border-bottom: none;
}

tbody tr:hover td {
    background: var(--card-2);
}

/* ------------------------------------------------------------- footer --- */
.footer {
    margin-top: 34px;
    padding: 26px;
    text-align: center;
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--r);
    color: var(--ink-3);
    font-family: var(--mono);
    font-size: 12px;
}

.footer p {
    margin: 4px 0;
    color: inherit;
}

@media (max-width: 640px) {
    .section {
        padding: 20px 17px;
    }

    .grid,
    .components-grid,
    .threat-grid,
    .countermeasure-grid {
        grid-template-columns: 1fr;
    }
}

/* ================================================================ layout
   containers the two pages use to hold the card grids                     */
.cia-container,
.cube-dimensions,
.lifecycle-comparison,
.aaa-container {
    display: grid;
    gap: 14px;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    margin: 0 0 16px;
    align-items: stretch;
}

.lifecycle-comparison {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.mccumber-cube {
    background: var(--card-2);
    border: 1px solid var(--line);
    border-radius: 13px;
    padding: 20px;
    margin: 0 0 16px;
}

/* the CIA trio is colour-coded by role, not by position */
.confidentiality {
    border-top: 3px solid var(--accent);
}

.integrity {
    border-top: 3px solid var(--accent-2);
}

.availability {
    border-top: 3px solid var(--ok);
}

.confidentiality h3,
.confidentiality h4 {
    color: var(--accent);
}

.integrity h3,
.integrity h4 {
    color: var(--accent-2);
}

.availability h3,
.availability h4 {
    color: var(--ok);
}

/* ============================================================ animation
   Everything below only engages once the script adds .has-reveal, so the
   page is fully readable if JavaScript never runs. breakdown.css already
   neutralises all of it under prefers-reduced-motion.                     */

@keyframes bd-rise {
    from {
        opacity: 0;
        transform: translateY(22px);
    }

    to {
        opacity: 1;
        transform: none;
    }
}

@keyframes bd-fade {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes bd-spine {
    from {
        transform: scaleX(0);
    }

    to {
        transform: scaleX(1);
    }
}

@keyframes bd-pop {
    0% {
        transform: scale(.86);
        opacity: 0;
    }

    60% {
        transform: scale(1.06);
    }

    100% {
        transform: scale(1);
        opacity: 1;
    }
}

@keyframes bd-sheen {
    0% {
        background-position: -140% 0;
    }

    100% {
        background-position: 240% 0;
    }
}

@keyframes bd-float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-7px);
    }
}

/* hero arrives on load */
.header h1 {
    animation: bd-rise .72s cubic-bezier(.22, .68, .32, 1) both;
}

.header p {
    animation: bd-rise .72s cubic-bezier(.22, .68, .32, 1) .12s both;
}

.header::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(105deg, transparent 30%, #ffffff1f 48%, transparent 62%);
    background-size: 220% 100%;
    animation: bd-sheen 7s ease-in-out 1.1s infinite;
    pointer-events: none;
}

/* sections and their cards rise as they enter the viewport */
html.has-reveal .section,
html.has-reveal .table-of-contents {
    opacity: 0;
}

html.has-reveal .section.in-view,
html.has-reveal .table-of-contents.in-view {
    animation: bd-rise .62s cubic-bezier(.22, .68, .32, 1) both;
}

html.has-reveal .section.in-view .card,
html.has-reveal .section.in-view .component-card,
html.has-reveal .section.in-view .cia-element,
html.has-reveal .section.in-view .dimension,
html.has-reveal .section.in-view .aaa-element,
html.has-reveal .section.in-view .threat-item,
html.has-reveal .section.in-view .countermeasure-item,
html.has-reveal .section.in-view .layer-item,
html.has-reveal .section.in-view .lifecycle-phase {
    animation: bd-rise .5s cubic-bezier(.22, .68, .32, 1) both;
    animation-delay: calc(var(--i, 0) * 55ms + 90ms);
}

html.has-reveal .section.in-view>h2::before {
    animation: bd-pop .5s cubic-bezier(.3, 1.4, .5, 1) both;
}

html.has-reveal .section.in-view .cia-element,
html.has-reveal .section.in-view .confidentiality,
html.has-reveal .section.in-view .integrity,
html.has-reveal .section.in-view .availability {
    transform-origin: left center;
}

/* callouts fade in a beat after their section */
html.has-reveal .section.in-view .tip-box,
html.has-reveal .section.in-view .example-box,
html.has-reveal .section.in-view .warning-box,
html.has-reveal .section.in-view .danger-box,
html.has-reveal .section.in-view .success-box,
html.has-reveal .section.in-view .highlight-box {
    animation: bd-fade .7s ease .25s both;
}

/* interaction polish */
.card,
.component-card,
.cia-element,
.dimension,
.aaa-element,
.threat-item,
.countermeasure-item {
    transition: border-color .2s ease, transform .22s cubic-bezier(.22, .68, .32, 1),
        box-shadow .22s ease, background .2s ease;
}

.section>h2::before {
    transition: transform .2s ease, background .2s ease;
}

.section:hover>h2::before {
    transform: rotate(-4deg) scale(1.06);
}

.badge {
    transition: transform .18s ease;
}

.badge:hover {
    transform: translateY(-1px) scale(1.04);
}

.quiz-options li {
    transition: transform .16s ease, border-color .16s ease, background .16s ease, color .16s ease;
}

.quiz-options li:hover {
    transform: translateX(4px);
}

.quiz-options li.correct::after {
    display: inline-block;
    animation: bd-pop .45s cubic-bezier(.3, 1.4, .5, 1) both;
}

.table-of-contents a {
    transition: transform .18s ease, border-color .18s, color .18s, background .18s;
}

.table-of-contents a:hover {
    background: var(--accent-wash);
}

.icon {
    display: inline-block;
    transition: transform .25s cubic-bezier(.3, 1.3, .5, 1);
}

.section:hover .icon {
    transform: scale(1.14) rotate(-6deg);
}

.footer {
    transition: border-color .2s ease;
}

.footer:hover {
    border-color: var(--accent-line);
}