/* ==========================================================================
   Bitrora — brand guidelines page (extends main.css)
   ========================================================================== */

/* Hero */
.b-hero { position: relative; isolation: isolate; overflow: hidden; min-height: 92svh; display: flex; align-items: center; padding: calc(var(--nav-h) + 56px) 0 72px; }
.b-hero canvas { position: absolute; inset: 0; width: 100%; height: 100%; z-index: -2; }
.b-hero::before { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(90deg, rgba(5,5,10,.9), rgba(5,5,10,.4) 50%, rgba(5,5,10,.1)), linear-gradient(180deg, transparent 60%, var(--bg)); }
.b-hero__inner { display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(0, .55fr); gap: 48px; align-items: center; }
.b-hero .h1 { font-size: clamp(3.2rem, 7.6vw, 6.8rem); }
.b-hero__copy { display: grid; gap: 26px; justify-items: start; }
.b-hero__mark { justify-self: center; width: min(100%, 420px); }
.b-hero__mark svg { width: 100%; height: auto; overflow: visible; filter: drop-shadow(0 0 60px rgba(47,168,255,.35)); animation: float 7s ease-in-out infinite; }
.b-hero__meta { display: flex; gap: 28px; flex-wrap: wrap; padding-top: 22px; border-top: 1px solid var(--line); font-size: .875rem; color: var(--text-2); }
.b-hero__meta b { display: block; font: 500 .7rem var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--text-3); margin-bottom: 4px; }
@media (max-width: 900px) { .b-hero__inner { grid-template-columns: 1fr; } .b-hero__mark { width: 52%; order: -1; justify-self: start; } }

/* Section scaffold */
.b-section { padding-block: clamp(80px, 10vw, 140px); border-top: 1px solid var(--line); }
.b-head { display: grid; grid-template-columns: 180px minmax(0, 1fr); gap: 32px; margin-bottom: clamp(40px, 5vw, 64px); }
.b-head__no { font: 500 .8rem var(--mono); color: var(--text-3); letter-spacing: .1em; padding-top: .9em; }
.b-head .lead { margin-top: 18px; max-width: 52ch; }
@media (max-width: 760px) { .b-head { grid-template-columns: 1fr; gap: 12px; } }

.b-sub { font: 500 .75rem var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--text-2); margin: 56px 0 18px; }

/* Logo tiles */
.tiles { display: grid; grid-template-columns: repeat(12, 1fr); gap: 16px; }
.tile { grid-column: span 4; display: flex; flex-direction: column; border-radius: var(--r-lg); overflow: hidden; box-shadow: inset 0 0 0 1px var(--line); background: var(--bg-1); }
.tile--6 { grid-column: span 6; }
.tile--8 { grid-column: span 8; }
.tile--12 { grid-column: span 12; }
.tile__art { position: relative; aspect-ratio: 16 / 10; display: flex; align-items: center; justify-content: center; padding: 10% 12%; overflow: hidden; isolation: isolate; }
.tile--12 .tile__art { aspect-ratio: 21 / 8; padding: 7% 20%; }
.tile__art img, .tile__art > svg { width: 100%; height: auto; max-height: 100%; object-fit: contain; }
.tile__art--mark img, .tile__art--mark > svg { width: auto; height: 62%; }
.tile__art--stack img { width: auto; height: 78%; }
.tile__art--icon img { width: auto; height: 82%; }
.tile__meta { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 16px 18px; border-top: 1px solid var(--line); }
.tile__meta strong { display: block; font-weight: 500; font-size: .95rem; letter-spacing: -.01em; }
.tile__meta small { display: block; color: var(--text-3); font-size: .8rem; }
.dl { display: flex; gap: 6px; flex: none; }
.dl a { display: inline-flex; align-items: center; height: 32px; padding: 0 12px; border-radius: 999px; font: 500 .7rem var(--mono); letter-spacing: .06em; color: var(--text-2); box-shadow: inset 0 0 0 1px var(--line-2); transition: color .25s, background-color .25s; }
.dl a:hover { color: var(--text); background: rgba(255,255,255,.07); }
.bg-dark { background: radial-gradient(80% 120% at 50% 120%, rgba(139,92,255,.22), transparent 60%), var(--bg-1); }
.bg-void { background: var(--bg); }
.bg-light { background: #F4F5FA; }
.bg-white { background: #fff; }
.bg-aurora { background: linear-gradient(120deg, #8B5CFF, #2FA8FF 55%, #36F2B4); }
.bg-photo { background: radial-gradient(60% 80% at 20% 30%, #3a2a6e, transparent 70%), radial-gradient(60% 80% at 80% 70%, #0e4a5c, transparent 70%), #121226; }
@media (max-width: 960px) { .tile, .tile--6, .tile--8 { grid-column: span 6; } }
@media (max-width: 620px) { .tile, .tile--6, .tile--8, .tile--12 { grid-column: span 12; } .tile--12 .tile__art { aspect-ratio: 16 / 9; padding: 10%; } }

/* Construction */
.construct { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr); gap: 16px; }
.construct__stage { position: relative; border-radius: var(--r-lg); background: var(--bg-1); box-shadow: inset 0 0 0 1px var(--line); aspect-ratio: 16 / 11; display: grid; place-items: center; overflow: hidden; }
.construct__stage::before { content: ""; position: absolute; inset: 0; background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px); background-size: 40px 40px; background-position: center; -webkit-mask-image: radial-gradient(circle at center, #000 30%, transparent 75%); mask-image: radial-gradient(circle at center, #000 30%, transparent 75%); }
.construct__stage svg { position: relative; width: 62%; overflow: visible; }
.c-part { fill: transparent; stroke-width: .7; transform-box: view-box; }
.c-b { stroke: #B79BFF; animation: cB 8s var(--ease-io) infinite; }
.c-r { stroke: var(--mint); animation: cR 8s var(--ease-io) infinite; }
.c-fill { opacity: 0; animation: cFill 8s var(--ease) infinite; }
.c-stem { stroke: rgba(255,255,255,.35); stroke-width: .4; stroke-dasharray: 2 2; fill: none; opacity: 0; animation: cStem 8s var(--ease) infinite; }
@keyframes cB { 0%, 12% { transform: translateX(-34px); fill: rgba(139,92,255,.06); opacity: 1; } 38%, 52% { transform: none; fill: rgba(139,92,255,.06); opacity: 1; } 64%, 90% { transform: none; opacity: 0; } 100% { transform: translateX(-34px); opacity: 1; } }
@keyframes cR { 0%, 12% { transform: translateX(34px); fill: rgba(54,242,180,.05); opacity: 1; } 38%, 52% { transform: none; fill: rgba(54,242,180,.05); opacity: 1; } 64%, 90% { transform: none; opacity: 0; } 100% { transform: translateX(34px); opacity: 1; } }
@keyframes cFill { 0%, 50% { opacity: 0; } 62%, 88% { opacity: 1; } 96%, 100% { opacity: 0; } }
@keyframes cStem { 0%, 34% { opacity: 0; } 40%, 56% { opacity: 1; } 64%, 100% { opacity: 0; } }
@media (prefers-reduced-motion: reduce) { .c-fill { opacity: 1; } .c-part, .c-stem { opacity: 0; } }
.construct__notes { display: grid; gap: 16px; }
.note { padding: 24px; border-radius: var(--r); background: rgba(255,255,255,.025); box-shadow: inset 0 0 0 1px var(--line); }
.note b { display: flex; align-items: center; gap: 10px; font-weight: 500; margin-bottom: 6px; }
.note b i { width: 10px; height: 10px; border-radius: 3px; background: var(--c); }
.note p { color: var(--text-2); font-size: .95rem; }
@media (max-width: 900px) { .construct { grid-template-columns: 1fr; } }

/* Clear space + min size */
.space { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, .6fr); gap: 16px; }
.space__stage { border-radius: var(--r-lg); background: var(--bg-1); box-shadow: inset 0 0 0 1px var(--line); padding: clamp(28px, 5vw, 64px); display: grid; place-items: center; }
.space__stage svg { width: 100%; overflow: visible; }
.space__min { display: grid; gap: 16px; }
.space__min .note { display: grid; gap: 18px; align-content: start; }
.space__min .logo-min { height: 13px; width: auto; color: var(--text); }
.space__min .mark-min { height: 16px; width: auto; }
@media (max-width: 900px) { .space { grid-template-columns: 1fr; } }

/* Misuse */
.donts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.dont { border-radius: var(--r-lg); overflow: hidden; background: var(--bg-1); box-shadow: inset 0 0 0 1px var(--line); }
.dont__art { position: relative; aspect-ratio: 16 / 9; display: grid; place-items: center; padding: 14%; overflow: hidden; }
.dont__art svg { width: 100%; overflow: visible; }
.dont__art::after { content: ""; position: absolute; inset: 0; background: linear-gradient(to top right, transparent calc(50% - 1px), rgba(255,92,124,.55) 50%, transparent calc(50% + 1px)); }
.dont__meta { display: flex; gap: 10px; align-items: center; padding: 14px 18px; border-top: 1px solid var(--line); font-size: .9rem; color: var(--text-2); }
.dont__meta span { display: grid; place-items: center; width: 22px; height: 22px; border-radius: 50%; background: rgba(255,92,124,.14); color: #FF7A93; font-size: .8rem; font-weight: 600; flex: none; }
@media (max-width: 900px) { .donts { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .donts { grid-template-columns: 1fr; } }

/* Colour */
.swatches { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.swatches--6 { grid-template-columns: repeat(6, 1fr); }
.swatch { text-align: left; border-radius: var(--r-lg); overflow: hidden; background: var(--bg-1); box-shadow: inset 0 0 0 1px var(--line); transition: transform .5s var(--ease), box-shadow .3s; }
.swatch:hover { transform: translateY(-3px); box-shadow: inset 0 0 0 1px var(--line-2); }
.swatch__chip { position: relative; aspect-ratio: 4 / 3; background: var(--c); box-shadow: inset 0 0 0 1px rgba(255,255,255,.1); border-radius: var(--r-lg) var(--r-lg) 0 0; }
.swatches--6 .swatch__chip { aspect-ratio: 1; }
.swatch__chip span { position: absolute; right: 12px; top: 12px; padding: 5px 9px; border-radius: 999px; font: 500 .68rem var(--mono); letter-spacing: .06em; background: rgba(0,0,0,.35); color: #fff; opacity: 0; transition: opacity .3s; }
.swatch:hover .swatch__chip span, .swatch.is-copied .swatch__chip span { opacity: 1; }
.swatch__info { display: grid; gap: 2px; padding: 16px 18px 18px; }
.swatch__info strong { font-weight: 500; }
.swatch__info code { font: 400 .8rem var(--mono); color: var(--text-2); }
.swatch__info small { color: var(--text-3); font-size: .8rem; margin-top: 6px; }
.gradient-card { margin-top: 16px; border-radius: var(--r-lg); overflow: hidden; box-shadow: inset 0 0 0 1px var(--line); background: var(--bg-1); }
.gradient-card__bar { height: 160px; background: var(--grad); position: relative; }
.gradient-card__bar span { position: absolute; bottom: 14px; font: 500 .72rem var(--mono); color: rgba(0,0,0,.65); letter-spacing: .06em; }
.gradient-card__info { display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 18px; flex-wrap: wrap; }
.gradient-card__info code { font: 400 .8rem var(--mono); color: var(--text-2); }
.ratio { display: flex; height: 64px; border-radius: 16px; overflow: hidden; margin-top: 16px; box-shadow: inset 0 0 0 1px var(--line); }
.ratio div { display: flex; align-items: flex-end; padding: 10px 12px; font: 500 .7rem var(--mono); letter-spacing: .06em; }
.ratio div:first-child { box-shadow: inset 0 0 0 1px var(--line-2); border-radius: 16px 0 0 16px; background-image: repeating-linear-gradient(135deg, transparent 0 10px, rgba(255,255,255,.025) 10px 11px) !important; }
@media (max-width: 960px) { .swatches--6 { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 620px) { .swatches, .swatches--6 { grid-template-columns: 1fr 1fr; } }

/* Type */
.type { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 16px; }
.type__card { border-radius: var(--r-lg); background: var(--bg-1); box-shadow: inset 0 0 0 1px var(--line); padding: clamp(24px, 3vw, 40px); display: grid; gap: 22px; align-content: start; }
.type__aa { font-size: clamp(6rem, 14vw, 11rem); line-height: .8; letter-spacing: -.06em; font-weight: 500; }
.type__aa--mono { font-family: var(--mono); letter-spacing: -.04em; font-weight: 400; }
.type__glyphs { color: var(--text-2); font-size: 1.05rem; line-height: 1.7; word-break: break-all; }
.type__weights { display: flex; flex-wrap: wrap; gap: 8px 22px; color: var(--text-2); }
.type__head { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; }
.type__head strong { font-size: 1.4rem; font-weight: 500; letter-spacing: -.03em; }
.scale { margin-top: 16px; border-radius: var(--r-lg); background: var(--bg-1); box-shadow: inset 0 0 0 1px var(--line); overflow: hidden; }
.scale__row { display: grid; grid-template-columns: 160px minmax(0, 1fr) 260px; gap: 24px; align-items: center; padding: 22px clamp(20px, 3vw, 36px); border-top: 1px solid var(--line); }
.scale__row:first-child { border-top: 0; }
.scale__row small { font: 500 .72rem var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--text-3); }
.scale__row code { font: 400 .78rem var(--mono); color: var(--text-3); text-align: right; }
.scale__row > div { overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
@media (max-width: 860px) { .type { grid-template-columns: 1fr; } .scale__row { grid-template-columns: 1fr; gap: 8px; } .scale__row code { text-align: left; } }

/* UI kit */
.kit { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.kit__cell { border-radius: var(--r-lg); background: var(--bg-1); box-shadow: inset 0 0 0 1px var(--line); padding: 28px; display: grid; gap: 18px; align-content: space-between; min-height: 240px; position: relative; overflow: hidden; isolation: isolate; }
.kit__cell > small { font: 500 .72rem var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--text-3); }
.kit__row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.kit__aurora { position: absolute; inset: 0; width: 100%; height: 100%; z-index: -1; }
.kit__grain { position: absolute; inset: 0; z-index: -1; background: radial-gradient(90% 90% at 80% 10%, rgba(139,92,255,.28), transparent 60%), #0d0d15; }
.kit__grain::after { content: ""; position: absolute; inset: 0; opacity: .22; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E"); }
.kit__grid { position: absolute; inset: 0; z-index: -1; background-image: linear-gradient(var(--line-2) 1px, transparent 1px), linear-gradient(90deg, var(--line-2) 1px, transparent 1px); background-size: 32px 32px; -webkit-mask-image: radial-gradient(circle at 70% 30%, #000, transparent 70%); mask-image: radial-gradient(circle at 70% 30%, #000, transparent 70%); }
@media (max-width: 960px) { .kit { grid-template-columns: 1fr 1fr; } }
@media (max-width: 620px) { .kit { grid-template-columns: 1fr; } }

/* Voice */
.voice { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.voice .note strong { display: block; font-size: 1.5rem; font-weight: 500; letter-spacing: -.035em; margin-bottom: 8px; }
.dodont { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 16px; }
.dodont > div { border-radius: var(--r-lg); padding: 26px; background: var(--bg-1); box-shadow: inset 0 0 0 1px var(--line); display: grid; gap: 14px; align-content: start; }
.dodont h4 { font: 500 .72rem var(--mono); letter-spacing: .12em; text-transform: uppercase; }
.dodont .do h4 { color: var(--mint); }
.dodont .dont-say h4 { color: #FF7A93; }
.dodont p { font-size: 1.15rem; letter-spacing: -.02em; line-height: 1.4; padding-left: 16px; border-left: 2px solid var(--line-2); }
.dodont .dont-say p { color: var(--text-3); text-decoration: line-through; text-decoration-color: rgba(255,122,147,.5); }
@media (max-width: 960px) { .voice { grid-template-columns: 1fr 1fr; } }
@media (max-width: 620px) { .voice, .dodont { grid-template-columns: 1fr; } }

/* Code block */
.code-block { position: relative; margin-top: 16px; border-radius: var(--r-lg); background: var(--bg-1); box-shadow: inset 0 0 0 1px var(--line); overflow: hidden; }
.code-block pre { margin: 0; padding: 24px 28px; font: 400 .85rem/1.8 var(--mono); color: var(--text-2); overflow-x: auto; }
.code-block pre b { color: #B79BFF; font-weight: 400; }
.code-block pre i { color: var(--mint); font-style: normal; }
.code-block button { position: absolute; top: 14px; right: 14px; }

/* Downloads */
.downloads { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.downloads .note h3 { font-size: 1.05rem; font-weight: 500; margin-bottom: 14px; }
.downloads ul { display: grid; gap: 4px; }
.downloads li a { display: flex; justify-content: space-between; gap: 12px; padding: 8px 0; border-bottom: 1px solid var(--line); font-size: .875rem; color: var(--text-2); transition: color .25s; }
.downloads li a:hover { color: var(--text); }
.downloads li a span { font: 500 .68rem var(--mono); color: var(--text-3); letter-spacing: .06em; padding-top: 2px; }
.kit-cta { display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; padding: clamp(28px, 4vw, 48px); border-radius: var(--r-lg); margin-bottom: 16px; background: radial-gradient(80% 140% at 100% 0%, rgba(47,168,255,.22), transparent 60%), radial-gradient(60% 120% at 0% 100%, rgba(139,92,255,.25), transparent 60%), var(--bg-1); box-shadow: inset 0 0 0 1px var(--line-2); }
.kit-cta h3 { font-size: clamp(1.6rem, 3vw, 2.4rem); letter-spacing: -.04em; font-weight: 500; }
.kit-cta p { color: var(--text-2); margin-top: 6px; }
@media (max-width: 1020px) { .downloads { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .downloads { grid-template-columns: 1fr; } }

.brand-tag { font: 500 .72rem var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--text-3); padding-left: 14px; margin-left: 14px; border-left: 1px solid var(--line-2); }
@media (max-width: 560px) { .brand-tag { display: none; } }