/* 05_difficulty — premium interactive chapter */

.chapter-content--difficulty {
    max-width: none;
}

/* Sticky nav */
.df-sticky-nav {
    position: sticky;
    top: calc(var(--header-height, 56px) + 0.35rem);
    z-index: 24;
    margin: 0 0 1.25rem;
    padding: 0.55rem 0.65rem;
    background: rgba(26, 22, 18, 0.94);
    border: 1px solid #2c2620;
    border-radius: var(--radius-lg, 12px);
    box-shadow: 0 10px 28px rgba(20, 17, 14, 0.2);
    backdrop-filter: blur(8px);
}

.df-sticky-nav-list {
    display: flex;
    gap: 0.35rem;
    overflow-x: auto;
    padding-bottom: 0.1rem;
    scrollbar-width: thin;
}

.df-sticky-nav-link {
    flex: 0 0 auto;
    padding: 0.28rem 0.7rem;
    border-radius: 999px;
    border: 1px solid transparent;
    background: rgba(196, 165, 116, 0.1);
    color: rgba(240, 232, 220, 0.78);
    font-family: var(--font-sans);
    font-size: 0.78rem;
    font-weight: 600;
    text-decoration: none;
    white-space: nowrap;
}

.df-sticky-nav-link:hover {
    border-color: var(--color-accent);
    color: #fff;
}

.df-sticky-nav-link.is-active {
    background: var(--color-accent);
    color: #1a1612;
    border-color: var(--color-accent);
}

/* Hero */
.df-hero {
    margin: 0 0 1.5rem;
    padding: 1.25rem 1.2rem 1.3rem;
    border-radius: 14px;
    border: 1px solid var(--color-border);
    background:
        linear-gradient(135deg, rgba(196, 165, 116, 0.14), transparent 55%),
        linear-gradient(180deg, #f9f5ec, #efe7d8);
}

.df-hero-eyebrow {
    margin: 0 0 0.3rem;
    font-family: var(--font-sans);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--color-primary);
}

.df-hero-title {
    margin: 0 0 0.55rem;
    font-family: var(--font-serif);
    font-size: clamp(1.9rem, 4vw, 2.5rem);
    color: var(--color-secondary);
}

.df-hero-lead {
    margin: 0 0 1rem;
    font-family: var(--font-sans);
    font-size: 1.05rem;
    color: var(--color-text-secondary);
    max-width: 44rem;
}

.df-flow {
    list-style: none;
    margin: 0 0 1rem;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem 0.15rem;
    align-items: center;
    font-family: var(--font-sans);
    font-size: 0.86rem;
    font-weight: 650;
}

.df-flow li {
    padding: 0.35rem 0.65rem;
    border-radius: 8px;
    background: var(--color-paper);
    border: 1px solid var(--color-border);
    color: var(--color-secondary);
}

.df-flow-sep {
    padding: 0 0.1rem !important;
    border: none !important;
    background: transparent !important;
    color: var(--color-primary) !important;
    font-weight: 700;
}

.df-flow-optional {
    border-style: dashed;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.df-callout {
    margin: 0;
    padding: 0.75rem 0.9rem;
    border-radius: 10px;
    background: rgba(196, 165, 116, 0.14);
    border-left: 3px solid var(--color-accent);
    font-family: var(--font-sans);
    font-size: 0.92rem;
    color: var(--color-text);
}

.df-callout p {
    margin: 0;
}

/* Sections */
.df-section {
    margin: 1.75rem 0 2rem;
    scroll-margin-top: 6.5rem;
}

.df-section > h2 {
    margin-top: 0;
}

.df-level-source[hidden] {
    display: none !important;
}

/* Scale cards */
.df-scale-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(10.5rem, 1fr));
    gap: 0.65rem;
    margin: 0.85rem 0 1rem;
}

.df-level-card {
    appearance: none;
    text-align: left;
    cursor: pointer;
    padding: 0.8rem 0.75rem;
    border-radius: 12px;
    border: 1px solid var(--color-border);
    background: var(--color-paper);
    color: var(--color-text);
    font-family: var(--font-sans);
    display: grid;
    gap: 0.2rem;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.df-level-card:hover {
    border-color: var(--color-accent);
}

.df-level-card.is-active {
    border-color: var(--color-secondary);
    box-shadow: inset 0 0 0 1px var(--color-secondary);
}

.df-level-card.is-key {
    box-shadow: inset 3px 0 0 var(--color-accent);
}

.df-level-card--armor {
    background: linear-gradient(180deg, #2a241e, #1a1612);
    border-color: #c4a574;
    color: #f0e8dc;
}

.df-level-card--armor .df-level-name,
.df-level-card--armor .df-level-num {
    color: var(--color-accent);
}

.df-level-card--armor .df-level-short,
.df-level-card--armor .df-level-blurb {
    color: rgba(240, 232, 220, 0.85);
}

.df-level-card--impossible {
    border-style: dashed;
    background: rgba(122, 59, 59, 0.06);
}

.df-level-num {
    font-family: var(--font-mono, 'JetBrains Mono', monospace);
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--color-primary);
}

.df-level-name {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-secondary);
}

.df-level-short {
    font-size: 0.8rem;
    font-weight: 650;
    color: var(--color-text-secondary);
}

.df-level-blurb {
    font-size: 0.78rem;
    line-height: 1.35;
    color: var(--color-text-muted, #6b6258);
}

.df-scale-detail {
    margin: 0.5rem 0 1rem;
    padding: 1rem;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.35);
}

.df-scale-detail[hidden] {
    display: none !important;
}

.df-scale-detail h2 {
    margin-top: 0;
    font-size: 1.35rem;
}

/* d100 */
.df-d100 {
    margin: 0.85rem 0 1rem;
    padding: 0.9rem;
    border: 1px solid var(--color-border);
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.35);
}

.df-widget-label {
    margin: 0 0 0.45rem;
    font-family: var(--font-sans);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-primary);
}

.df-d100-chips,
.df-example-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
    margin-bottom: 0.65rem;
}

.df-chip {
    appearance: none;
    border: 1px solid var(--color-border);
    background: var(--color-paper);
    color: var(--color-text);
    font-family: var(--font-mono, 'JetBrains Mono', monospace);
    font-size: 0.82rem;
    font-weight: 600;
    padding: 0.35rem 0.6rem;
    border-radius: 8px;
    cursor: pointer;
}

.df-chip.is-active {
    background: var(--color-secondary);
    border-color: var(--color-secondary);
    color: #f0e8dc;
}

.df-d100-meta {
    margin: 0 0 0.55rem;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

.df-d100-bar {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 0.25rem;
    min-height: 4.2rem;
}

.df-d100-seg {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 0.4rem 0.35rem;
    border-radius: 8px;
    font-family: var(--font-sans);
    font-size: 0.72rem;
    color: #1a1612;
}

.df-d100-seg.is-empty {
    opacity: 0.35;
}

.df-d100-range {
    font-family: var(--font-mono, 'JetBrains Mono', monospace);
    font-weight: 600;
}

.df-d100-name {
    font-weight: 700;
}

.df-d100-seg--tragedy { background: #d7b0b0; }
.df-d100-seg--failure { background: #dfc2a8; }
.df-d100-seg--medium { background: #d8cdb8; }
.df-d100-seg--success { background: #b9cfb7; }
.df-d100-seg--triumph { background: #e4d2ae; }

/* Accordion / spoilers */
.df-accordion {
    display: grid;
    gap: 0.45rem;
    margin: 0.75rem 0;
}

.df-acc-item,
.df-spoiler {
    border: 1px solid var(--color-border);
    border-radius: 10px;
    background: var(--color-paper);
    padding: 0.15rem 0.75rem 0.55rem;
}

.df-acc-item > summary,
.df-spoiler > summary {
    cursor: pointer;
    font-family: var(--font-sans);
    font-weight: 650;
    color: var(--color-secondary);
    padding: 0.55rem 0.15rem;
    list-style: none;
}

.df-acc-item > summary::-webkit-details-marker,
.df-spoiler > summary::-webkit-details-marker {
    display: none;
}

.df-acc-body {
    font-size: 0.95rem;
}

.df-formula {
    background: rgba(196, 165, 116, 0.12) !important;
    border-left: 3px solid var(--color-accent);
}

.df-callout-block {
    padding: 0.9rem 1rem;
    border-radius: 12px;
    border: 1px solid rgba(196, 165, 116, 0.45);
    background: rgba(196, 165, 116, 0.12);
}

/* Special levels */
.df-special-card {
    margin: 0.85rem 0;
    padding: 1rem 1.05rem;
    border-radius: 14px;
    border: 1px solid var(--color-border);
    background: var(--color-paper);
}

.df-special-card > h2 {
    margin-top: 0;
}

.df-special-card--seven {
    background: linear-gradient(180deg, #2a241e, #1a1612);
    border-color: #c4a574;
    color: #f0e8dc;
}

.df-special-card--seven,
.df-special-card--seven * {
    color: #f0e8dc;
}

.df-special-card--seven h2,
.df-special-card--seven strong,
.df-special-card--seven summary {
    color: var(--color-accent);
}

.df-special-card--seven .rule-spoiler,
.df-special-card--seven details {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(196, 165, 116, 0.35);
}

.df-special-card--impossible {
    border-style: dashed;
    background: rgba(122, 59, 59, 0.06);
}

.df-contrast {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.65rem;
    margin-top: 1rem;
}

.df-contrast > div {
    padding: 0.75rem 0.85rem;
    border-radius: 10px;
    border: 1px solid var(--color-border);
    background: rgba(255, 255, 255, 0.3);
    font-family: var(--font-sans);
    font-size: 0.9rem;
}

.df-contrast strong {
    display: block;
    margin-bottom: 0.25rem;
    font-family: var(--font-mono, 'JetBrains Mono', monospace);
    color: var(--color-primary);
}

/* Errors */
.df-error-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.65rem;
    margin-top: 0.75rem;
}

.df-error-card {
    padding: 0.85rem;
    border-radius: 12px;
    border: 1px solid var(--color-border);
    background: var(--color-paper);
}

.df-error-card > h3 {
    margin-top: 0;
    font-size: 1.05rem;
}

.df-error-card.is-critical {
    border-color: #c4a574;
    box-shadow: inset 3px 0 0 var(--color-accent);
    background: linear-gradient(90deg, rgba(196, 165, 116, 0.14), transparent);
}

/* Template copy */
.df-copy-wrap {
    position: relative;
    margin: 0.75rem 0;
}

.df-copy-wrap pre {
    padding-right: 7rem;
}

.df-btn {
    appearance: none;
    position: absolute;
    top: 0.45rem;
    right: 0.45rem;
    border: 1px solid var(--color-secondary);
    background: var(--color-secondary);
    color: #f0e8dc;
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.28rem 0.55rem;
    border-radius: 8px;
    cursor: pointer;
}

/* Examples */
.df-example-panel {
    padding: 0.85rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.3);
}

.df-example-panel[hidden] {
    display: none !important;
}

.df-example-panel > h2 {
    margin-top: 0;
    font-size: 1.25rem;
}

/* Dark */
html[data-theme='dark'] .df-hero,
html[data-theme='dark'] .df-level-card,
html[data-theme='dark'] .df-d100,
html[data-theme='dark'] .df-scale-detail,
html[data-theme='dark'] .df-acc-item,
html[data-theme='dark'] .df-spoiler,
html[data-theme='dark'] .df-error-card,
html[data-theme='dark'] .df-example-panel,
html[data-theme='dark'] .df-special-card,
html[data-theme='dark'] .df-contrast > div {
    background: #221c17;
    border-color: #3a322a;
    color: #e8e0d4;
}

html[data-theme='dark'] .df-hero-title,
html[data-theme='dark'] .df-level-name {
    color: #f0e8dc;
}

html[data-theme='dark'] .df-flow li {
    background: #1a1612;
    border-color: #3a322a;
    color: #f0e8dc;
}

@media (max-width: 860px) {
    .df-d100-bar,
    .df-contrast,
    .df-error-grid {
        grid-template-columns: 1fr;
    }

    .df-copy-wrap pre {
        padding-right: 1rem;
        padding-top: 2.2rem;
    }
}

body.is-editing .df-sticky-nav {
    display: none !important;
}