/* =====================================================================
   Project case-study pages — builds on ../style.css (tokens, header,
   buttons, tags, cursor, wipe). Same navy / ivory / gold / teal system.
   ===================================================================== */

.is-loading [data-enter] { visibility: hidden; }

/* ---------- Header extras ---------- */
.p-backlink {
    display: inline-flex; align-items: center; gap: 0.55rem;
    padding: 0.5rem 1rem 0.5rem 0.8rem; border-radius: 999px;
    border: 1px solid var(--line); background: var(--surface);
    font-size: 0.86rem; font-weight: 700; color: var(--text-2);
    transition: color 0.3s, border-color 0.3s, background-color 0.3s;
}
.p-backlink .ic { color: var(--accent); transition: transform 0.4s var(--ease); }
.p-backlink:hover { color: var(--text); border-color: var(--line-2); }
.p-backlink:hover .ic { transform: translateX(-3px); }

/* ---------- Hero ---------- */
.p-hero { position: relative; isolation: isolate; overflow: hidden; padding: calc(var(--header-h) + clamp(2.5rem, 7vh, 4.5rem)) 0 clamp(3.5rem, 8vw, 6rem); }
.p-hero .hero__aura span { filter: blur(90px); }
.p-hero__grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.08fr); gap: clamp(2rem, 5vw, 4.5rem); align-items: center; }
.p-crumb { display: flex; flex-wrap: wrap; align-items: center; gap: 0.6rem; margin-bottom: 1.4rem; font-family: var(--f-mono); font-size: 0.74rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--text-3); }
.p-crumb a { color: var(--accent); }
.p-crumb a:hover { text-decoration: underline; text-underline-offset: 4px; }
.p-crumb__sep { width: 18px; height: 7px; background: radial-gradient(circle at calc(100% - 3.5px) 50%, var(--teal) 2.4px, transparent 3px), linear-gradient(90deg, var(--line-2), var(--line-2)) 0 50% / calc(100% - 8px) 1px no-repeat; }
.p-num { display: block; font-family: var(--f-display); font-style: italic; font-weight: 300; font-size: clamp(3.2rem, 7vw, 5.4rem); line-height: 0.8; color: transparent; -webkit-text-stroke: 1px color-mix(in srgb, var(--accent) 70%, transparent); margin-bottom: 0.2rem; }
.p-title { font-family: var(--f-display); font-weight: 380; font-variation-settings: 'opsz' 144; font-size: clamp(2.9rem, 7.6vw, 6.2rem); line-height: 0.98; letter-spacing: -0.04em; margin-bottom: 1.1rem; }
.p-title .mask { padding-bottom: 0.12em; margin-bottom: -0.12em; }
.p-pitch { font-size: clamp(1.04rem, 1.5vw, 1.22rem); line-height: 1.6; color: var(--text-2); max-width: 44ch; margin-bottom: 1.8rem; }
.p-meta { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1px; margin-bottom: 1.4rem; border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; background: var(--line); }
.p-meta > div { padding: 0.85rem 1.05rem; background: var(--bg); }
.p-meta dt { font-family: var(--f-mono); font-size: 0.66rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--text-3); margin-bottom: 0.2rem; }
.p-meta dd { font-weight: 700; font-size: 0.94rem; line-height: 1.35; }
.p-hero .tags { margin-bottom: 1.6rem; }
.p-links { display: flex; flex-wrap: wrap; gap: 0.7rem; }
.p-links .btn { min-height: 46px; padding: 0.65rem 1.2rem; font-size: 0.88rem; }
.p-note { display: flex; gap: 0.6rem; align-items: flex-start; margin-top: 1.3rem; max-width: 52ch; font-size: 0.84rem; line-height: 1.55; color: var(--text-3); }
.p-note .ic { margin-top: 0.2rem; color: var(--teal); }

/* Visuals */
.p-visual { position: relative; }
.p-frame { position: relative; border-radius: 18px; overflow: hidden; border: 1px solid var(--line-2); background: var(--bg-2); box-shadow: var(--shadow); }
.p-frame__bar { display: flex; align-items: center; gap: 0.42rem; padding: 0.62rem 0.85rem; border-bottom: 1px solid var(--line); background: var(--surface-2); }
.p-frame__bar i { width: 9px; height: 9px; border-radius: 50%; background: var(--line-2); }
.p-frame__bar i:nth-child(1) { background: var(--accent); }
.p-frame__bar i:nth-child(2) { background: var(--teal); }
.p-frame__url { margin-left: 0.6rem; font-family: var(--f-mono); font-size: 0.7rem; color: var(--text-3); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.p-frame__shot { display: block; width: 100%; padding: 0; border: 0; background: none; cursor: zoom-in; }
.p-frame__shot img { display: block; width: 100%; height: auto; aspect-ratio: 16 / 10; object-fit: cover; object-position: top; }
.p-chip {
    position: absolute; display: inline-flex; align-items: center; gap: 0.6rem;
    padding: 0.6rem 0.95rem 0.6rem 0.65rem; border-radius: 999px;
    background: color-mix(in srgb, var(--bg) 82%, transparent); -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px);
    border: 1px solid var(--line-2); box-shadow: var(--shadow); font-size: 0.82rem; font-weight: 700;
}
.p-chip b { display: grid; place-items: center; min-width: 34px; height: 34px; padding-inline: 0.4rem; border-radius: 999px; background: var(--grad); color: var(--accent-ink); font-family: var(--f-display); font-size: 0.95rem; font-weight: 500; }
.p-chip--a { left: -1.2rem; bottom: -1.3rem; }
.p-chip--b { right: -1rem; top: -1.2rem; }
.p-visual { margin-block: 1.4rem; }

.p-code { padding: 1.15rem 1.35rem 1.35rem; font-family: var(--f-mono); font-size: 0.8rem; line-height: 1.85; color: var(--text-2); overflow-x: auto; }
.p-code__line { display: flex; gap: 1.1rem; white-space: pre; }
.p-code__ln { color: var(--text-3); opacity: 0.6; user-select: none; min-width: 1.4rem; text-align: right; }
.p-code .k { color: var(--accent); }
.p-code .t { color: var(--teal); }
.p-code .c { color: var(--text-3); }
.p-code__caret { display: inline-block; width: 0.55em; height: 1.1em; vertical-align: -0.2em; background: var(--teal); animation: blink 1s steps(2, start) infinite; }
.p-flow { display: flex; flex-wrap: wrap; align-items: center; gap: 0.35rem; padding: 0 1.35rem 1.3rem; }
.p-flow span { padding: 0.28rem 0.6rem; border-radius: 999px; border: 1px solid var(--line-2); font-family: var(--f-mono); font-size: 0.66rem; letter-spacing: 0.04em; color: var(--text); background: var(--surface); }
.p-flow span.is-ok { border-color: color-mix(in srgb, var(--teal) 55%, transparent); color: var(--teal); }
.p-flow span.is-no { border-color: color-mix(in srgb, #d06a6a 55%, transparent); color: #d98b8b; }
[data-theme="light"] .p-flow span.is-no { color: #a33b3b; }
.p-flow i { width: 14px; height: 1px; background: var(--accent); position: relative; }
.p-flow i::after { content: ''; position: absolute; right: -1px; top: -2.5px; width: 6px; height: 6px; border-top: 1px solid var(--accent); border-right: 1px solid var(--accent); transform: rotate(45deg); }

/* ---------- Sections ---------- */
.p-section { position: relative; padding: clamp(4.5rem, 10vw, 7.5rem) 0; }
.p-section--alt { background: var(--bg-2); border-block: 1px solid var(--line); }
.p-tagnum { color: var(--text-3); }
.p-split { display: grid; grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr); gap: clamp(2rem, 6vw, 5rem); align-items: start; }
.p-prose p { color: var(--text-2); font-size: 1.03rem; line-height: 1.75; }
.p-prose p + p { margin-top: 1rem; }
.p-prose p:first-child { font-size: clamp(1.1rem, 1.6vw, 1.24rem); color: var(--text); line-height: 1.6; }
.p-facts { display: grid; gap: 0.6rem; margin-top: 2rem; }
.p-fact { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; padding: 0.9rem 1.1rem; border: 1px solid var(--line); border-radius: var(--r); background: var(--surface); }
.p-fact dt { font-family: var(--f-mono); font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-3); }
.p-fact dd { font-weight: 700; font-size: 0.92rem; text-align: right; }
.p-role { max-width: 780px; }

.p-features { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; }
.p-feature { position: relative; overflow: hidden; padding: clamp(1.3rem, 2.2vw, 1.7rem); border-radius: var(--r-lg); border: 1px solid var(--line); background: var(--surface); transition: border-color 0.4s; }
.p-feature:hover { border-color: var(--line-2); }
.p-feature__ic { display: grid; place-items: center; width: 44px; height: 44px; margin-bottom: 1.1rem; border-radius: 14px; background: var(--accent-soft); color: var(--accent); font-size: 1.1rem; }
.p-feature:nth-child(even) .p-feature__ic { background: var(--teal-soft); color: var(--teal); }
.p-feature h3 { font-family: var(--f-display); font-weight: 450; font-size: 1.25rem; letter-spacing: -0.015em; line-height: 1.25; margin-bottom: 0.45rem; }
.p-feature p { color: var(--text-2); font-size: 0.93rem; line-height: 1.6; }

.p-stack { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 1rem; margin-bottom: 2.4rem; }
.p-stack__group { padding: 1.2rem 1.3rem; border-radius: var(--r-lg); border: 1px solid var(--line); background: var(--surface); }
.p-stack__group h3 { font-family: var(--f-mono); font-size: 0.7rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent); font-weight: 600; margin-bottom: 0.8rem; }

.p-diagram { margin: 0; padding: clamp(1rem, 2.6vw, 2.2rem); border-radius: var(--r-lg); border: 1px solid var(--line); background: radial-gradient(80% 90% at 50% 0%, color-mix(in srgb, var(--teal) 7%, transparent), transparent 70%), var(--bg); }
.p-section--alt .p-diagram { background: radial-gradient(80% 90% at 50% 0%, color-mix(in srgb, var(--teal) 7%, transparent), transparent 70%), var(--bg); }
.p-diagram__head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 0.5rem 1rem; margin-bottom: 1.2rem; }
.p-diagram__head h3 { font-family: var(--f-display); font-weight: 450; font-size: 1.35rem; }
.p-diagram figcaption { font-family: var(--f-mono); font-size: 0.72rem; color: var(--text-3); letter-spacing: 0.03em; }

/* SVG diagram */
.dg { display: block; width: 100%; height: auto; overflow: visible; font-family: var(--f-body); }
.dg--mob { display: none; }
.dg-node rect { fill: var(--bg-2); stroke: var(--line-2); stroke-width: 1.2; }
.dg-node--main rect { stroke: var(--accent); fill: color-mix(in srgb, var(--accent) 9%, var(--bg-2)); }
.dg-node--store rect { stroke: var(--teal); fill: color-mix(in srgb, var(--teal) 7%, var(--bg-2)); }
.dg-node--client rect { stroke: color-mix(in srgb, var(--teal) 50%, var(--accent)); }
.dg-node--ext rect { stroke-dasharray: 5 4; }
.dg-label { font-weight: 800; font-size: 15px; fill: var(--text); text-anchor: middle; }
.dg-sub { font-family: var(--f-mono); font-size: 11px; fill: var(--text-2); text-anchor: middle; }
.dg-edge { fill: none; stroke: var(--teal); stroke-width: 1.6; stroke-linecap: round; opacity: 0.75; }
.dg-edge--dash { stroke: var(--accent); stroke-dasharray: 5 6; }
.dg-packet { fill: var(--accent); opacity: 0; transition: opacity 0.6s; }
.dg-packet--back { fill: var(--teal); }
.dg.is-live .dg-packet { opacity: 1; }
.dg-elabel rect { fill: var(--bg); stroke: var(--line-2); stroke-width: 1; }
.dg-elabel text { font-family: var(--f-mono); font-size: 10.5px; fill: var(--text-2); text-anchor: middle; }
.dg-group rect { fill: color-mix(in srgb, var(--accent) 4%, transparent); stroke: var(--line-2); stroke-dasharray: 2 6; stroke-width: 1.4; }
.dg-group__label { font-family: var(--f-mono); font-size: 12px; letter-spacing: 0.12em; fill: var(--accent); text-transform: uppercase; }

.p-highlights { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.p-hl { position: relative; padding: clamp(1.4rem, 2.4vw, 1.9rem); border-radius: var(--r-lg); border: 1px solid var(--line); background: var(--surface); }
.p-hl__num { display: inline-flex; align-items: center; gap: 0.55rem; font-family: var(--f-mono); font-size: 0.72rem; color: var(--accent); letter-spacing: 0.1em; margin-bottom: 0.7rem; }
.p-hl__num::after { content: ''; width: 26px; height: 7px; background: radial-gradient(circle at calc(100% - 3.5px) 50%, var(--teal) 2.4px, transparent 3px), linear-gradient(90deg, var(--accent), var(--accent)) 0 50% / calc(100% - 8px) 1px no-repeat; }
.p-hl h3 { font-family: var(--f-display); font-weight: 450; font-size: clamp(1.2rem, 2vw, 1.4rem); letter-spacing: -0.015em; line-height: 1.25; margin-bottom: 0.55rem; }
.p-hl p { color: var(--text-2); font-size: 0.95rem; line-height: 1.65; }

.p-subhead { margin: clamp(2.6rem, 6vw, 3.6rem) 0 1.2rem; font-family: var(--f-display); font-weight: 450; font-size: clamp(1.4rem, 2.6vw, 1.8rem); letter-spacing: -0.02em; }
.p-challenges { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; }
.p-ch { display: flex; flex-direction: column; gap: 0.9rem; padding: 1.4rem; border-radius: var(--r-lg); border: 1px solid var(--line); background: var(--bg); }
.p-section--alt .p-ch { background: var(--bg); }
.p-ch h4 { font-family: var(--f-display); font-weight: 500; font-size: 1.12rem; line-height: 1.3; }
.p-ch__part { position: relative; padding-left: 1rem; border-left: 1px solid var(--line-2); }
.p-ch__part:last-child { border-left-color: var(--teal); }
.p-ch__label { display: block; font-family: var(--f-mono); font-size: 0.66rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--text-3); margin-bottom: 0.25rem; }
.p-ch__part:last-child .p-ch__label { color: var(--teal); }
.p-ch p { font-size: 0.9rem; line-height: 1.6; color: var(--text-2); }

.p-stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border: 1px solid var(--line); border-radius: var(--r-lg); overflow: hidden; background: var(--line); gap: 1px; }
.p-stat { display: flex; flex-direction: column; gap: 0.45rem; padding: clamp(1.3rem, 2.6vw, 2rem); background: var(--bg); }
.p-section--alt .p-stat { background: var(--bg-2); }
.p-stat__num { font-family: var(--f-display); font-weight: 400; font-size: clamp(2.3rem, 4.6vw, 3.6rem); line-height: 1; letter-spacing: -0.03em; font-variant-numeric: tabular-nums; }
.p-stat__num--text { font-size: clamp(1.9rem, 3.6vw, 2.8rem); font-style: italic; color: var(--accent); }
.p-stat__lbl { font-family: var(--f-mono); font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-3); }

.p-gallery { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; }
.p-gallery--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.p-shot { margin: 0; }
.p-shot__btn { position: relative; display: block; width: 100%; padding: 0; border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; background: var(--bg-2); cursor: zoom-in; }
.p-shot__btn img { display: block; width: 100%; height: auto; aspect-ratio: 16 / 10; object-fit: cover; object-position: top; transition: transform 0.8s var(--ease); }
.p-shot__btn::after { content: ''; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 55%, rgba(12, 21, 36, 0.55)); opacity: 0; transition: opacity 0.4s; }
.p-shot__zoom { position: absolute; right: 0.8rem; bottom: 0.8rem; z-index: 1; display: grid; place-items: center; width: 38px; height: 38px; border-radius: 50%; background: var(--accent); color: var(--accent-ink); opacity: 0; transform: translateY(8px) scale(0.9); transition: opacity 0.4s, transform 0.5s var(--ease); }
.p-shot__btn:hover img, .p-shot__btn:focus-visible img { transform: scale(1.04); }
.p-shot__btn:hover::after, .p-shot__btn:focus-visible::after { opacity: 1; }
.p-shot__btn:hover .p-shot__zoom, .p-shot__btn:focus-visible .p-shot__zoom { opacity: 1; transform: none; }
.p-shot figcaption { padding: 0.65rem 0.2rem 0; font-size: 0.84rem; line-height: 1.5; color: var(--text-2); }
.p-gallery-note { margin-top: 1.4rem; font-size: 0.82rem; color: var(--text-3); display: flex; gap: 0.5rem; align-items: center; }
.p-gallery-note .ic { color: var(--teal); }

/* Lightbox */
.lb { position: fixed; inset: 0; z-index: 800; display: grid; place-items: center; padding: 4.5rem 4.5rem 3rem; background: rgba(6, 11, 20, 0.93); -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px); }
.lb[hidden] { display: none; }
.lb__fig { margin: 0; display: grid; justify-items: center; gap: 0.9rem; max-width: min(1240px, 100%); }
.lb__img { display: block; max-width: 100%; max-height: calc(100vh - 11rem); max-height: calc(100svh - 11rem); width: auto; height: auto; border-radius: 12px; box-shadow: 0 30px 80px -20px rgba(0, 0, 0, 0.8); touch-action: pan-y; }
.lb__cap { max-width: 70ch; text-align: center; color: #d5dbe4; font-size: 0.92rem; line-height: 1.5; }
.lb__count { font-family: var(--f-mono); font-size: 0.72rem; color: #8b96a8; letter-spacing: 0.12em; }
.lb__btn { position: absolute; display: grid; place-items: center; width: 50px; height: 50px; border-radius: 50%; background: rgba(255, 255, 255, 0.08); border: 1px solid rgba(255, 255, 255, 0.18); color: #f4efe4; font-size: 1.05rem; transition: background-color 0.3s, color 0.3s; }
.lb__btn:hover { background: #d3ac6e; color: #13203a; }
.lb__btn--close { top: 1.1rem; right: 1.1rem; }
.lb__btn--prev { left: 1.1rem; top: 50%; margin-top: -25px; }
.lb__btn--next { right: 1.1rem; top: 50%; margin-top: -25px; }

/* Prev / next */
.p-next { padding: clamp(3.5rem, 8vw, 5.5rem) 0 clamp(4rem, 9vw, 6rem); }
.p-next__grid { display: grid; grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr); gap: 1rem; align-items: stretch; }
.p-next__card { position: relative; overflow: hidden; display: flex; flex-direction: column; gap: 0.4rem; padding: clamp(1.4rem, 3vw, 2.2rem); border-radius: var(--r-lg); border: 1px solid var(--line); background: var(--surface); transition: border-color 0.4s, background-color 0.4s; }
.p-next__card:hover { border-color: var(--accent); background: var(--accent-soft); }
.p-next__card--next { text-align: right; align-items: flex-end; }
.p-next__label { display: inline-flex; align-items: center; gap: 0.5rem; font-family: var(--f-mono); font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--text-3); }
.p-next__label .ic { color: var(--accent); transition: transform 0.5s var(--ease); }
.p-next__card--prev:hover .p-next__label .ic { transform: translateX(-4px); }
.p-next__card--next:hover .p-next__label .ic { transform: translateX(4px); }
.p-next__name { font-family: var(--f-display); font-weight: 400; font-size: clamp(1.6rem, 3.4vw, 2.6rem); letter-spacing: -0.03em; line-height: 1.05; }
.p-next__num { position: absolute; right: 1.2rem; bottom: -0.6rem; font-family: var(--f-display); font-style: italic; font-size: 5rem; line-height: 1; color: transparent; -webkit-text-stroke: 1px var(--line-2); pointer-events: none; }
.p-next__card--next .p-next__num { right: auto; left: 1.2rem; }
.p-next__all { display: grid; place-items: center; align-content: center; gap: 0.5rem; padding: 1.2rem 1.6rem; border-radius: var(--r-lg); border: 1px dashed var(--line-2); font-weight: 700; font-size: 0.9rem; text-align: center; transition: border-color 0.3s, color 0.3s; }
.p-next__all .ic { font-size: 1.2rem; color: var(--teal); }
.p-next__all:hover { border-color: var(--teal); color: var(--teal); }

.p-footer { border-top: 1px solid var(--line); padding-top: 3rem; background: var(--bg-2); }
.p-footer .footer__brand { padding-bottom: 1.6rem; }

/* ---------- Responsive ---------- */
@media (max-width: 1100px) {
    .p-features { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .p-challenges { grid-template-columns: 1fr; }
}
@media (max-width: 960px) {
    .p-hero__grid { grid-template-columns: 1fr; }
    .p-visual { max-width: 680px; }
    .p-split { grid-template-columns: 1fr; }
    .p-highlights { grid-template-columns: 1fr; }
    .p-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .p-gallery { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .p-next__grid { grid-template-columns: 1fr 1fr; }
    .p-next__all { grid-column: 1 / -1; grid-row: 2; }
}
@media (max-width: 700px) {
    .dg--desk { display: none; }
    .dg--mob { display: block; }
    .dg--mob .dg-label { font-size: 13.5px; }
}
@media (max-width: 640px) {
    .p-backlink { padding: 0; width: 38px; height: 38px; justify-content: center; }
    .p-backlink span { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
    .p-features { grid-template-columns: 1fr; }
    .p-gallery, .p-gallery--3 { grid-template-columns: 1fr; }
    .p-chip--a { left: 0.4rem; bottom: -1.2rem; }
    .p-chip--b { right: 0.4rem; top: -1.2rem; }
    .p-next__grid { grid-template-columns: 1fr; }
    .p-next__card--next { text-align: left; align-items: flex-start; }
    .p-next__card--next .p-next__num { left: auto; right: 1.2rem; }
    .p-next__all { grid-row: auto; }
    .p-fact { flex-direction: column; gap: 0.2rem; }
    .p-fact dd { text-align: left; }
    .lb { padding: 4rem 0.8rem 5.5rem; }
    .lb__btn--prev, .lb__btn--next { top: auto; bottom: 1rem; margin-top: 0; }
    .lb__btn--prev { left: calc(50% - 60px); }
    .lb__btn--next { right: calc(50% - 60px); }
}
@media (prefers-reduced-motion: reduce) {
    .dg .dg-packet { display: none; }
}