/* =============================================================================
   Playbook — Sticky stack cards + chapter sliders
   Adaptado do sistema sais.sh para vistonvisa
   ============================================================================= */

/* -------------------------------------------------------------
   Tokens (isolados do resto do theme)
   ------------------------------------------------------------- */
:root {
    --pb-bg:           #ffffff;
    --pb-bg-soft:      #f8fafc;   /* slate-50 */
    --pb-bg-muted:     #f1f5f9;   /* slate-100 */
    --pb-text:         #0f172a;   /* slate-900 */
    --pb-text-dim:     #475569;   /* slate-600 */
    --pb-text-mute:    #94a3b8;   /* slate-400 */
    --pb-border:       #e2e8f0;   /* slate-200 */
    --pb-border-soft:  #eef2f6;   /* slate-200 mais claro */
    --pb-border-strong:#cbd5e1;   /* slate-300 */
    --pb-radius-sm:    6px;
    --pb-radius:       10px;
    --pb-radius-lg:    14px;
    --pb-ease:         cubic-bezier(.2, .7, .2, 1);
    --pb-ff-sans:      -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    --pb-ff-mono:      "SF Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

    --stack-top:       96px;
    --stack-step:      10px;
    --stack-radius:    24px;
}

/* -------------------------------------------------------------
   Tailwind preflight overrides — prevent reset of playbook elements
   ------------------------------------------------------------- */
#playbook h2,
#playbook h3,
#playbook h4,
.playbook-stack h2,
.playbook-stack h3,
.playbook-stack h4 {
    font-size: revert;
    font-weight: 600;
    color: var(--pb-text);
}
#playbook p,
.playbook-stack p {
    margin: 0;
    color: var(--pb-text-dim);
}
#playbook a,
.playbook-stack a {
    color: inherit;
    text-decoration: none;
}
#playbook img,
.playbook-stack img {
    display: block;
    max-width: 100%;
}

/* -------------------------------------------------------------
   Section base
   ------------------------------------------------------------- */
.pb-section {
    padding: clamp(40px, 5vw, 72px) 0;
    position: relative;
    display: block;
}
.pb-section--muted { background: var(--pb-bg-soft); }

.pb-section__head {
    max-width: 720px;
    margin: 0 auto 28px;
    text-align: center;
}
.pb-section__kicker {
    font-family: var(--pb-ff-mono);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--pb-text-mute);
    margin-bottom: 14px;
    display: block;
}
.pb-section__title {
    font-size: clamp(18px, 2.2vw, 26px);
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.15;
    color: var(--pb-text);
    margin: 0 0 12px;
}
.pb-section__lede {
    font-size: clamp(13px, 1vw, 15px);
    font-weight: 600;
    line-height: 1.65;
    color: var(--pb-text-dim);
    max-width: 640px;
    margin: 0 auto;
}

.pb-wrap {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 clamp(20px, 4vw, 40px);
}

/* -------------------------------------------------------------
   Playbook intro (description + TOC, 2-col layout)
   ------------------------------------------------------------- */
.playbook-intro {
    display: block;
    max-width: 1040px;
    margin: 0 auto;
}
.playbook-intro__desc {
    color: var(--pb-text-dim);
    font-size: clamp(14px, 1.05vw, 15.5px);
    line-height: 1.7;
}
.playbook-intro__desc p {
    margin: 0 0 14px;
}
.playbook-intro__desc p:last-child { margin-bottom: 0; }

@media (min-width: 880px) {
    .playbook-intro--split {
        display: grid;
        grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
        gap: clamp(28px, 4vw, 56px);
        align-items: start;
        text-align: left;
    }
    .playbook-intro--split .playbook-intro__toc { margin-top: 0; }
}

.playbook-intro__desc + .playbook-intro__toc {
    margin-top: 24px;
}

/* -------------------------------------------------------------
   Playbook TOC
   ------------------------------------------------------------- */
.playbook-toc {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
    max-width: 680px;
    margin: 0 auto;
}
@media (min-width: 640px) { .playbook-toc { grid-template-columns: repeat(2, 1fr); } }
.playbook-intro--split .playbook-intro__toc {
    grid-template-columns: 1fr;
    max-width: none;
    margin: 0;
}
.playbook-toc a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 18px;
    border: 1px solid var(--pb-border);
    border-radius: var(--pb-radius);
    font-size: 13.5px;
    font-weight: 500;
    color: var(--pb-text);
    background: var(--pb-bg);
    text-decoration: none;
    transition: border-color .2s var(--pb-ease), transform .2s var(--pb-ease);
}
.playbook-toc a:hover {
    border-color: var(--pb-text);
    transform: translateY(-1px);
}
.playbook-toc a span {
    font-family: var(--pb-ff-mono);
    font-size: 11px;
    color: var(--pb-text-mute);
    letter-spacing: 0.06em;
    flex-shrink: 0;
}

/* -------------------------------------------------------------
   Playbook Stack container
   ------------------------------------------------------------- */
.playbook-stack {
    position: relative;
    padding: clamp(24px, 3.5vw, 56px) 0 var(--stack-runway, 0);
    isolation: isolate;
}
.playbook-stack + .pb-section {
    position: relative;
    z-index: 1;
    background: var(--pb-bg);
    margin-top: calc(-1 * var(--stack-runway));
}
.playbook-stack + .pb-section.pb-section--muted {
    background: var(--pb-bg-soft);
}
.playbook-stack__bg,
.playbook-stack__aurora { display: none; }

/* Rail */
.playbook-stack__rail {
    position: fixed;
    right: max(12px, calc((100vw - min(1380px, 92vw)) / 2 - 30px));
    top: 50%;
    transform: translateY(-50%);
    z-index: 40;
    pointer-events: none;
    opacity: 0;
    transition: opacity .45s var(--pb-ease);
}
.playbook-stack__rail.is-visible { opacity: 1; }

.playbook-stack__rail-counter {
    display: flex;
    flex-direction: column;
    align-items: center;
    font-family: var(--pb-ff-mono);
    font-size: 9px;
    font-feature-settings: "tnum";
    letter-spacing: 0.06em;
    color: var(--pb-text-mute);
    line-height: 1.3;
    margin-bottom: 14px;
    white-space: nowrap;
}

.playbook-stack__rail-dots-wrap {
    max-height: min(70vh, 560px);
    overflow: hidden;
    -webkit-mask-image: linear-gradient(to bottom, transparent 0%, #000 6%, #000 94%, transparent 100%);
    mask-image: linear-gradient(to bottom, transparent 0%, #000 6%, #000 94%, transparent 100%);
}

.playbook-stack__rail-dots {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 7px;
    list-style: none;
    margin: 0;
    padding: 0;
    transition: transform .3s var(--pb-ease);
}
.playbook-stack__rail-dot {
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--pb-text-mute);
    opacity: var(--dot-opacity, 0.25);
    transform: scale(var(--dot-scale, 0.6));
    transition: opacity .3s var(--pb-ease), transform .3s var(--pb-ease), background .3s var(--pb-ease);
    flex-shrink: 0;
}
.playbook-stack__rail-dot.is-active {
    background: var(--pb-text);
    opacity: 1;
    transform: scale(1.35);
}
.playbook-stack__rail-sep { color: var(--pb-text-mute); }

/* -------------------------------------------------------------
   Stack cards (chapters) — sticky stacking
   ------------------------------------------------------------- */
.playbook-stack .stack-card {
    padding: 0 !important;
    border: none;
    background: transparent;
    position: sticky;
    top: calc(var(--stack-top) + var(--stack-i, 0) * var(--stack-step));
    height: clamp(600px, 78vh, 88vh);
    margin: 0 auto clamp(24px, 3vh, 40px);
    max-width: min(1080px, 92vw);
    width: 100%;
    --p: 0;
    transform:
        translate3d(0, calc(var(--p) * -16px), 0)
        scale(calc(1 - var(--p) * 0.035));
    transform-origin: 50% 0%;
    will-change: transform;
    z-index: calc(10 + var(--stack-i, 0));
}

.playbook-stack .stack-card > .pb-wrap {
    position: relative;
    background: var(--pb-bg);
    border: 1px solid var(--pb-border);
    border-radius: var(--stack-radius);
    padding: clamp(24px, 3vw, 40px);
    box-shadow: none;
    overflow: hidden;
    max-width: none;
    opacity: 1;
}
.playbook-stack .stack-card > .pb-wrap > * { position: relative; z-index: 1; }
.playbook-stack .stack-card--split > .pb-wrap::after { display: none; }

/* Chapter kicker */
.playbook-stack .stack-card .chapter__num {
    font-family: var(--pb-ff-mono);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--pb-text-mute);
    display: inline-block;
    background: transparent;
    border: none;
    padding: 0;
    margin-bottom: 18px;
    border-radius: 0;
}

/* Chapter head/body */
.playbook-stack .stack-card .chapter__head {
    opacity: 1;
    transform: none;
    max-width: none;
    margin-bottom: 11px;
}
.playbook-stack .stack-card .chapter__body {
    opacity: 1;
    transform: none;
    max-width: none;
    columns: 1;
}
.playbook-stack .stack-card .chapter__body > h3:first-child,
.playbook-stack .stack-card .chapter__body > h4:first-child,
.playbook-stack .stack-card .chapter__body > p:first-child {
    margin-top: 0;
}

/* Chapter inner */
.chapter__inner { max-width: 920px; margin: 0 auto; }
.chapter__head { margin-bottom: 40px; }
.chapter__title {
    font-size: clamp(16px, 1.6vw, 21px);
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.15;
    color: var(--pb-text);
    margin: 0;
}
.chapter__lede,
.playbook-stack .chapter__lede {
    font-size: clamp(12.5px, 0.9vw, 14px);
    font-weight: 600;
    line-height: 1.65;
    color: var(--pb-text-dim);
    margin-top: 10px;
}
.chapter__body {
    font-size: 14px;
    line-height: 1.72;
    color: var(--pb-text-dim);
}
.chapter__body p { margin-bottom: 14px; }
.chapter__body p strong { color: inherit; font-weight: 600; }
.chapter__body em { color: inherit; font-style: italic; }
.chapter__body h3 {
    font-size: clamp(14.5px, 1.1vw, 17px);
    font-weight: 600;
    color: var(--pb-text);
    margin: 28px 0 10px;
}
.chapter__body blockquote {
    border-left: 3px solid var(--pb-border-strong);
    padding: 14px 20px;
    margin: 20px 0;
    font-style: italic;
    color: var(--pb-text-dim);
}
.chapter__body blockquote cite {
    display: block;
    margin-top: 8px;
    font-style: normal;
    font-size: 13px;
    color: var(--pb-text-mute);
}

/* Callout */
.pb-callout {
    background: var(--pb-bg-soft);
    border: 1px solid var(--pb-border);
    border-radius: var(--pb-radius);
    padding: 18px 22px;
    margin: 20px 0;
}
.pb-callout__label {
    font-family: var(--pb-ff-mono);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--pb-text-mute);
    display: block;
    margin-bottom: 6px;
}

/* H3 with bar */
.playbook-stack .stack-card .chapter__body h3 {
    position: relative;
    padding-left: 18px;
}
.playbook-stack .stack-card .chapter__body h3::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.45em;
    width: 3px;
    height: 0.85em;
    background: var(--pb-text);
    border-radius: 2px;
}

/* -------------------------------------------------------------
   Split layout 50/50 — slider + prose
   ------------------------------------------------------------- */
.playbook-stack .stack-card--split {
    max-width: min(1380px, 92vw);
}
.playbook-stack .stack-card--split > .pb-wrap {
    padding: clamp(20px, 2.5vw, 36px);
}
.playbook-stack .stack-card--split > .pb-wrap.chapter__inner {
    max-width: none;
}
.chapter__split {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 64px);
    align-items: stretch;
    min-height: clamp(440px, 62vh, 680px);
}
.stack-card--split-right .chapter__split {
    grid-template-areas: "prose media";
}
.stack-card--split-right .chapter__split > .chapter__media { grid-area: media; }
.stack-card--split-right .chapter__split > .chapter__prose { grid-area: prose; }
.stack-card--split-left .chapter__split {
    grid-template-areas: "media prose";
}
.stack-card--split-left .chapter__split > .chapter__media { grid-area: media; }
.stack-card--split-left .chapter__split > .chapter__prose { grid-area: prose; }

/* Slider side */
.chapter__media {
    position: relative;
    display: flex;
    flex-direction: column;
    background: var(--pb-bg-soft);
    border: 1px solid var(--pb-border);
    border-radius: 18px;
    padding: clamp(20px, 2.4vw, 32px);
    overflow: hidden;
    min-height: 0;
    min-width: 0;
}
.chapter__media-label {
    font-family: var(--pb-ff-mono);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.09em;
    color: var(--pb-text-mute);
    margin-bottom: 14px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}
.chapter__media-count {
    font-feature-settings: "tnum";
    color: var(--pb-text-mute);
}

/* Slider */
.chapter__slider {
    flex: 1 1 auto;
    min-height: 0;
    min-width: 0;
    width: 100%;
    scroll-behavior: smooth;
    scrollbar-width: none;
}
.chapter__slider::-webkit-scrollbar { display: none; }

.chapter__slider--horizontal {
    display: grid;
    grid-auto-flow: column;
    grid-auto-columns: 100%;
    gap: 16px;
    overflow-x: auto;
    overflow-y: hidden;
    scroll-snap-type: x mandatory;
    padding-bottom: 6px;
}
.chapter__slider--horizontal .chapter__slide {
    min-width: 0;
    scroll-snap-align: start;
}

/* Slide */
.chapter__slide {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: clamp(18px, 2vw, 26px);
    border-radius: 14px;
    background: var(--pb-bg);
    border: 1px solid var(--pb-border);
    box-shadow: 0 2px 8px -6px rgba(15, 17, 21, 0.06);
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--pb-border-strong) transparent;
}
.chapter__slide::-webkit-scrollbar { width: 5px; }
.chapter__slide::-webkit-scrollbar-thumb {
    background: var(--pb-border-strong);
    border-radius: 3px;
}
.chapter__slide-num {
    font-family: var(--pb-ff-mono);
    font-size: 11px;
    letter-spacing: 0.06em;
    color: var(--pb-text-mute);
    text-transform: uppercase;
}
.chapter__slide h4 {
    font-size: clamp(14.5px, 1.1vw, 17px);
    line-height: 1.22;
    margin: 0;
    color: var(--pb-text);
}
.chapter__slide p {
    font-size: 13px;
    line-height: 1.72;
    margin: 0;
    color: var(--pb-text-mute);
}
.chapter__slide strong { color: inherit; }

/* Nav — dots/arrows */
.chapter__slider-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-top: 14px;
}
.chapter__slider-dots {
    display: flex;
    gap: 6px;
    list-style: none;
    padding: 0;
    margin: 0;
}
.chapter__slider-dots button {
    width: 8px;
    height: 8px;
    padding: 0;
    border: 0;
    border-radius: 50%;
    background: var(--pb-border-strong);
    cursor: pointer;
    transition: transform .2s var(--pb-ease), background .2s var(--pb-ease);
}
.chapter__slider-dots button.is-active {
    background: var(--pb-text);
    transform: scale(1.35);
}
.chapter__slider-arrows {
    display: flex;
    gap: 6px;
}
.chapter__slider-arrows button {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 1px solid var(--pb-border-strong);
    background: var(--pb-bg);
    cursor: pointer;
    font: inherit;
    color: var(--pb-text);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all .2s var(--pb-ease);
}
.chapter__slider-arrows button:hover {
    border-color: var(--pb-text);
    transform: translateY(-1px);
}

/* Prose side */
.chapter__prose {
    display: flex;
    flex-direction: column;
    gap: 16px;
    max-height: clamp(440px, 62vh, 680px);
    overflow-y: auto;
    padding-right: 14px;
    scrollbar-width: thin;
    scrollbar-color: var(--pb-border-strong) transparent;
    mask-image: linear-gradient(to bottom, transparent 0, #000 20px, #000 calc(100% - 30px), transparent 100%);
    -webkit-mask-image: linear-gradient(to bottom, transparent 0, #000 20px, #000 calc(100% - 30px), transparent 100%);
}
.chapter__prose::-webkit-scrollbar { width: 6px; }
.chapter__prose::-webkit-scrollbar-thumb {
    background: var(--pb-border-strong);
    border-radius: 3px;
}
.chapter__prose .chapter__head {
    margin-bottom: 6px;
    opacity: 1;
    transform: none;
    max-width: none;
}
.chapter__prose .chapter__body {
    opacity: 1;
    transform: none;
    max-width: none;
    columns: 1;
    padding-bottom: 20px;
}
.stack-card--split .chapter__head .chapter__title {
    font-size: clamp(16px, 1.5vw, 21px);
}

/* -------------------------------------------------------------
   --stack-i per card
   ------------------------------------------------------------- */
.stack-card[data-stack-index="0"]  { --stack-i: 0; }
.stack-card[data-stack-index="1"]  { --stack-i: 1; }
.stack-card[data-stack-index="2"]  { --stack-i: 2; }
.stack-card[data-stack-index="3"]  { --stack-i: 3; }
.stack-card[data-stack-index="4"]  { --stack-i: 4; }
.stack-card[data-stack-index="5"]  { --stack-i: 5; }
.stack-card[data-stack-index="6"]  { --stack-i: 6; }
.stack-card[data-stack-index="7"]  { --stack-i: 7; }
.stack-card[data-stack-index="8"]  { --stack-i: 8; }
.stack-card[data-stack-index="9"]  { --stack-i: 9; }
.stack-card[data-stack-index="10"] { --stack-i: 10; }
.stack-card[data-stack-index="11"] { --stack-i: 11; }
.stack-card[data-stack-index="12"] { --stack-i: 12; }
.stack-card[data-stack-index="13"] { --stack-i: 13; }
.stack-card[data-stack-index="14"] { --stack-i: 14; }
.stack-card[data-stack-index="15"] { --stack-i: 15; }
.stack-card[data-stack-index="16"] { --stack-i: 16; }
.stack-card[data-stack-index="17"] { --stack-i: 17; }
.stack-card[data-stack-index="18"] { --stack-i: 18; }
.stack-card[data-stack-index="19"] { --stack-i: 19; }
.stack-card--ghost {
    visibility: hidden;
    pointer-events: none;
}

/* -------------------------------------------------------------
   Mobile — disable sticky stacking
   ------------------------------------------------------------- */
@media (max-width: 960px) {
    .playbook-stack {
        padding: 40px 0 60px;
    }
    .playbook-stack + .pb-section {
        margin-top: 0;
    }
    .playbook-stack__rail {
        display: none;
    }
    .playbook-stack .stack-card {
        position: static;
        height: auto;
        min-height: 0;
        transform: none !important;
        filter: none !important;
        margin: 0 auto 24px;
        --p: 0;
    }
    .playbook-stack .stack-card > .pb-wrap {
        padding: 32px 24px;
        border-radius: 20px;
    }
    .playbook-stack .stack-card .chapter__head,
    .playbook-stack .stack-card .chapter__body {
        opacity: 1;
        transform: none;
    }
    .playbook-stack .stack-card .chapter__body {
        columns: 1;
    }
}

@media (max-width: 880px) {
    .playbook-stack .stack-card--split {
        max-width: min(1080px, 92vw);
        min-height: auto;
    }
    .chapter__split,
    .stack-card--split-left .chapter__split,
    .stack-card--split-right .chapter__split {
        grid-template-columns: 1fr;
        grid-template-areas: "media" "prose";
        min-height: auto;
        gap: 24px;
    }
    .chapter__media { min-height: 360px; }
    .chapter__prose {
        max-height: none;
        overflow: visible;
        padding-right: 0;
        mask-image: none;
        -webkit-mask-image: none;
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    .playbook-stack .stack-card {
        position: static;
        height: auto;
        min-height: 0;
        transform: none !important;
        margin-bottom: 32px;
    }
    .playbook-stack__rail { display: none; }
    .playbook-stack .stack-card .chapter__head,
    .playbook-stack .stack-card .chapter__body {
        opacity: 1 !important;
        transform: none !important;
        transition: none !important;
    }
}