/* Design tokens now live in global.css (single source of truth) */

body {
    background-color: var(--mm-bg);
    /* Dot-grid texture + a soft top vignette - reads like a game map's grid,
       and keeps the wide margins around the (intentionally narrower) map
       column from looking like flat dead space on large screens. */
    background-image:
        radial-gradient(circle, rgba(148, 163, 184, 0.14) 1px, transparent 1px),
        radial-gradient(ellipse 1000px 520px at 50% 0%, rgba(96, 165, 250, 0.07), transparent 70%);
    background-size: 26px 26px, 100% 100%;
    background-repeat: repeat, no-repeat;
    background-attachment: fixed, fixed;
    transition: background-color 0.3s ease;
}

.chapter-selection {
    /* `width: 100%` matters here: body is a column flexbox (for the sticky
       footer layout), and this element's `margin: 40px auto` for centering
       triggers flexbox's "auto cross-margin overrides stretch" rule, which
       falls back to a shrink-to-fit width. That used to look fine because
       the old flex-row chapter cards had real in-flow width to shrink-fit
       around - but .skill-map's children are all `position: absolute` (out
       of flow), so with no explicit width this collapses to ~400px instead
       of filling up to max-width. */
    width: 100%;
    max-width: 1040px;
    margin: 40px auto;
    padding: 0 20px;
    font-family: var(--mm-font);
    --card-accent: var(--mm-accent);
    --card-accent-soft: rgba(96, 165, 250, 0.14);
    --card-accent-faint: rgba(96, 165, 250, 0.06);
}

/* Each course picks up its own brand color (matches the homepage track
   cards and the bagrut pages), so the page reads as "the Java course" /
   "the C# course" rather than a generic checklist. */
.chapter-selection.java {
    --card-accent: #ed8b00;
    --card-accent-soft: rgba(237, 139, 0, 0.14);
    --card-accent-faint: rgba(237, 139, 0, 0.11);
}

.chapter-selection.csharp {
    --card-accent: #9b4f96;
    --card-accent-soft: rgba(155, 79, 150, 0.14);
    --card-accent-faint: rgba(155, 79, 150, 0.11);
}

.chapter-hero {
    text-align: center;
    margin-bottom: 44px;
}

.chapter-hero-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 16px;
    padding: 11px;
    box-sizing: border-box;
    background: var(--card-accent-soft);
    border: 1px solid var(--card-accent-soft);
    border-radius: 14px;
}

.chapter-hero-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.chapter-hero h1 {
    margin: 0 0 10px;
    color: var(--mm-text);
    font-size: 2rem;
    font-weight: 800;
}

.chapter-hero p {
    margin: 0;
    color: var(--mm-text-dim);
    font-size: 1.02rem;
}

.hero-badge {
    display: inline-flex;
    padding: 5px 14px;
    background: var(--card-accent-soft);
    border: 1px solid var(--card-accent-soft);
    color: var(--card-accent);
    border-radius: 999px;
    font-family: var(--mm-mono);
    font-size: 0.78rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    margin-bottom: 16px;
}

/* ── Skill map: an open node-graph of circular chapter nodes loosely
   scattered around a center axis and connected by thin edges. Units are
   told apart by a floating name plaque and a per-unit accent tint (see
   .unit-tint-N below) rather than a big colored background shape - a
   knowledge-graph feel rather than a single-file vertical list. All node/
   plaque positions are computed and pixel-placed by js/lessonPath.js, not
   by flex/grid flow, so the container height is set explicitly in JS to
   match its absolutely positioned children. ── */
.skill-map {
    position: relative;
    margin-top: 12px;
}

/* 5 accent tints derived from the page's own --card-accent (the Java/C#
   brand color) rather than unrelated hues, so unit clusters read as
   distinct in the graph without breaking the site-wide language identity.
   Must have one entry per lessonUnits entry (js/data/lessonsData.js) - a
   count mismatch here silently makes a later unit clone an earlier one's
   color instead of getting its own (real bug found 2026-08-10: 5 units
   existed but only 4 tints were defined here, so unit index 4 wrapped
   around to unit-tint-0 and collided with unit 0's color). */
.unit-tint-0 { --node-accent: var(--card-accent); }
.unit-tint-1 { --node-accent: color-mix(in srgb, var(--card-accent) 60%, white); }
.unit-tint-2 { --node-accent: color-mix(in srgb, var(--card-accent) 75%, black); }
.unit-tint-3 { --node-accent: color-mix(in srgb, var(--card-accent) 50%, white); }
.unit-tint-4 { --node-accent: color-mix(in srgb, var(--card-accent) 88%, black); }

.skill-trail {
    position: absolute;
    inset: 0;
    z-index: 0;
    overflow: visible;
    pointer-events: none;
}

/* Thin, static graph edges - no "marching ants" animation, so the map reads
   as a calm diagram rather than a busy game path. */
.graph-edge {
    stroke: var(--mm-text-dim);
    stroke-width: 2;
    stroke-linecap: round;
    stroke-dasharray: 1 9;
    opacity: 0.3;
    transition: stroke 0.3s ease, opacity 0.3s ease;
}

.graph-edge.is-traveled {
    stroke: var(--card-accent);
    stroke-width: 2.5;
    stroke-dasharray: none;
    opacity: 0.8;
    filter: drop-shadow(0 0 5px color-mix(in srgb, var(--card-accent) 55%, transparent));
}

.skill-region-plaque {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    display: flex;
    align-items: center;
    gap: 12px;
    background: color-mix(in srgb, var(--mm-surface) 80%, transparent);
    border: 1px solid color-mix(in srgb, var(--node-accent, var(--card-accent)) 32%, var(--mm-border));
    border-radius: 999px;
    padding: 8px 20px 8px 14px;
    box-shadow: 0 14px 30px rgba(0, 0, 0, 0.32);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    white-space: nowrap;
}

.skill-region-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    background: color-mix(in srgb, var(--node-accent, var(--card-accent)) 16%, transparent);
    box-shadow: 0 0 0 5px color-mix(in srgb, var(--node-accent, var(--card-accent)) 8%, transparent);
}

.skill-region-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
}

.skill-region-label {
    font-family: var(--mm-mono);
    font-size: 0.64rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    color: var(--node-accent, var(--card-accent));
}

/* Flags a unit as content beyond the core curriculum (e.g. שאלון 899271
   extension material), so it never silently reads as core-curriculum
   coverage it isn't. */
.skill-region-badge {
    display: inline-flex;
    margin-inline-start: 8px;
    padding: 1px 8px;
    border-radius: 999px;
    background: rgba(148, 163, 184, 0.16);
    color: var(--mm-text-dim);
    font-weight: 700;
}

.skill-region-title {
    font-size: 1rem;
    font-weight: 800;
    color: var(--mm-text);
}

/* Node = a glassy circular badge, tinted per-unit via --node-accent, plus a
   plain caption underneath. Positioned absolutely (left:X%, top:Ypx set
   inline by JS) so it can sit anywhere across the map's width -
   translateX(-50%) centers the node on its target point since `left` is a
   single coordinate, not a box edge. */
.chapter-card {
    position: absolute;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    width: 150px;
    transform: translateX(-50%);
    text-align: center;
    text-decoration: none;
    color: var(--mm-text);
    z-index: 1;
    opacity: 0;
    animation: chapterFadeIn 0.4s ease forwards;
    animation-delay: calc(var(--chapter-index, 0) * 0.06s);
}

@keyframes chapterFadeIn {
    from { opacity: 0; transform: translateX(-50%) translateY(10px); }
    to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
    .chapter-card {
        opacity: 1;
        animation: none;
    }
}

.chapter-node {
    position: relative;
    flex-shrink: 0;
    width: 72px;
    height: 72px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid color-mix(in srgb, var(--node-accent, var(--card-accent)) 40%, transparent);
    background: linear-gradient(160deg, var(--mm-surface) 0%, var(--mm-bg) 100%);
    box-shadow: 0 10px 22px rgba(0, 0, 0, 0.32), 0 0 0 6px color-mix(in srgb, var(--node-accent, var(--card-accent)) 10%, transparent);
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

/* A thin glassy highlight arcing across the top - keeps the flat circle
   from reading as a dead disc and more like a lit, physical badge. */
.chapter-node::before {
    content: "";
    position: absolute;
    top: 6px;
    left: 10px;
    right: 10px;
    height: 34%;
    border-radius: 50% / 100%;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.18), transparent);
    pointer-events: none;
}

.chapter-node-label {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--mm-mono);
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--node-accent, var(--card-accent));
}

.chapter-card:hover .chapter-node {
    transform: translateY(-6px) scale(1.04);
    border-color: var(--node-accent, var(--card-accent));
    box-shadow: 0 16px 28px rgba(0, 0, 0, 0.36), 0 0 0 8px color-mix(in srgb, var(--node-accent, var(--card-accent)) 16%, transparent);
}

.chapter-card:active .chapter-node {
    transform: translateY(0) scale(0.97);
    box-shadow: 0 6px 14px rgba(0, 0, 0, 0.3), 0 0 0 6px color-mix(in srgb, var(--node-accent, var(--card-accent)) 10%, transparent);
}

.chapter-caption {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    min-width: 0;
}

.chapter-caption-title {
    font-size: 0.92rem;
    font-weight: 700;
    line-height: 1.3;
}

.chapter-caption-time {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: var(--mm-mono);
    font-size: 0.68rem;
    color: var(--mm-text-dim);
    background: rgba(148, 163, 184, 0.1);
    padding: 3px 10px;
    border-radius: 999px;
    white-space: nowrap;
}

.chapter-card:hover .chapter-caption-time {
    background: var(--card-accent-soft);
    color: var(--card-accent);
}

.chapter-card.is-completed .chapter-node {
    border-color: transparent;
    background: linear-gradient(160deg, #6ee7a0 0%, #22c55e 100%);
    box-shadow: 0 10px 22px rgba(21, 128, 61, 0.35), 0 0 0 6px rgba(34, 197, 94, 0.16);
}

.chapter-card.is-completed .chapter-node-label {
    color: transparent;
}

.chapter-card.is-completed .chapter-node-label::after {
    content: "✓";
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #052e16;
    font-size: 1.6rem;
    font-weight: 800;
}

.chapter-card.is-next .chapter-node {
    border-color: transparent;
    background: linear-gradient(160deg, color-mix(in srgb, var(--node-accent, var(--card-accent)) 80%, white) 0%, var(--node-accent, var(--card-accent)) 100%);
    animation: nextNodePulse 2.4s ease-in-out infinite;
}

.chapter-card.is-next .chapter-node-label {
    color: #ffffff;
}

@keyframes nextNodePulse {
    0%, 100% {
        box-shadow: 0 10px 22px rgba(0, 0, 0, 0.32), 0 0 0 0 color-mix(in srgb, var(--node-accent, var(--card-accent)) 20%, transparent);
    }
    50% {
        box-shadow: 0 10px 22px rgba(0, 0, 0, 0.32), 0 0 0 14px color-mix(in srgb, var(--node-accent, var(--card-accent)) 20%, transparent);
    }
}

@media (prefers-reduced-motion: reduce) {
    .chapter-card.is-next .chapter-node {
        animation: none;
        box-shadow: 0 10px 22px rgba(0, 0, 0, 0.32), 0 0 0 6px color-mix(in srgb, var(--node-accent, var(--card-accent)) 20%, transparent);
    }
}

.chapter-card.is-next .chapter-caption::before {
    content: "הפרק הבא";
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: 999px;
    font-family: var(--mm-mono);
    background: var(--card-accent-soft);
    color: var(--card-accent);
    font-size: 0.68rem;
    font-weight: 700;
}

@media (max-width: 480px) {
    .chapter-card {
        width: 118px;
    }

    .chapter-node {
        width: 56px;
        height: 56px;
        box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3), 0 0 0 5px color-mix(in srgb, var(--node-accent, var(--card-accent)) 10%, transparent);
    }

    .chapter-node-label {
        font-size: 1.1rem;
    }

    .chapter-card.is-completed .chapter-node-label::after {
        font-size: 1.3rem;
    }

    .chapter-caption-title {
        font-size: 0.8rem;
    }

    .skill-region-plaque {
        padding: 6px 14px 6px 10px;
        gap: 8px;
    }

    .skill-region-icon {
        width: 32px;
        height: 32px;
        font-size: 1.1rem;
    }

    .skill-region-title {
        font-size: 0.85rem;
    }
}