/* ==========================================================================
   CinderTek - Inner pages
   Work, Services, About and Contact. Static layouts built on the tokens in
   variables.css and the primitives in global.css / components.css.
   ========================================================================== */

/* --------------------------------------------------------------------------
   Page intro
   -------------------------------------------------------------------------- */

.page-intro {
    padding-block: var(--space-section) var(--space-section-sm);
    border-bottom: var(--border-default);
}

.page-intro__inner {
    display: grid;
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: var(--space-8) var(--grid-gap);
    align-items: end;
}

.page-intro__head {
    grid-column: 1 / span 7;
    display: grid;
    gap: var(--space-6);
}

.page-intro__title {
    font-size: var(--fs-4xl);
    line-height: var(--lh-tight);
    letter-spacing: var(--ls-tighter);
}

.page-intro__lead {
    grid-column: 8 / -1;
    max-width: var(--measure-narrow);
}

/* --------------------------------------------------------------------------
   Page section - two-column head (label / content)
   -------------------------------------------------------------------------- */

.page-section {
    padding-block: var(--space-section);
}

.page-section + .page-section {
    border-top: var(--border-default);
}

.page-intro + .page-section {
    padding-top: var(--space-section-sm);
}

.page-section--alt {
    background-color: var(--color-surface-alt);
}

/* Same composition as the homepage section heads: eyebrow over title on
   the left, supporting text bottom-aligned on the right. */
.section-head {
    display: grid;
    grid-template-columns: repeat(12, minmax(0, 1fr));
    grid-template-areas:
        "label label label label label label label . . . . ."
        "title title title title title title title . text text text text";
    align-items: end;
    gap: var(--space-6) var(--grid-gap);
    margin-bottom: var(--space-16);
}

.section-head__label {
    grid-area: label;
}

.section-head__body {
    display: contents;
}

.section-head__title {
    grid-area: title;
    font-size: var(--fs-3xl);
    line-height: var(--lh-tight);
    max-width: 18ch;
}

.section-head__text {
    grid-area: text;
    max-width: var(--measure-narrow);
}

/* Definition-style facts: small caps label over a value */
.facts {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr));
    gap: var(--space-6) var(--grid-gap);
}

.facts dt {
    margin-bottom: var(--space-2);
    font-size: var(--fs-2xs);
    font-weight: var(--fw-semibold);
    letter-spacing: var(--ls-caps);
    text-transform: uppercase;
    color: var(--color-text-muted);
}

.facts dd {
    font-size: var(--fs-sm);
    line-height: var(--lh-normal);
    color: var(--color-text);
}

/* Ruled variant: each fact sits under a strong hairline, larger value */
.facts--ruled {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.facts--ruled > div {
    padding-top: var(--space-6);
    border-top: var(--border-strong);
}

.facts--ruled dt {
    margin-bottom: var(--space-4);
}

.facts--ruled dd {
    font-family: var(--font-display);
    font-size: var(--fs-md);
    font-weight: var(--fw-semibold);
    line-height: var(--lh-snug);
    letter-spacing: var(--ls-tight);
}

.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

/* Hairline list with a square ember marker */
.checklist {
    display: grid;
    gap: 0;
    border-top: var(--border-default);
}

.checklist li {
    position: relative;
    padding: var(--space-3) 0 var(--space-3) var(--space-6);
    font-size: var(--fs-sm);
    line-height: var(--lh-normal);
    color: var(--color-text);
    border-bottom: var(--border-default);
}

.checklist li::before {
    content: "";
    position: absolute;
    top: calc(var(--space-3) + 0.55em);
    left: 0;
    width: 5px;
    height: 5px;
    background-color: var(--color-accent);
}

/* --------------------------------------------------------------------------
   Closing CTA band (Work, Services, About)
   -------------------------------------------------------------------------- */

.page-cta {
    padding-block: var(--space-section);
}

.page-cta__inner {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    justify-content: space-between;
    gap: var(--space-10) var(--space-16);
}

.page-cta__title {
    font-size: var(--fs-3xl);
    line-height: var(--lh-tight);
    max-width: 16ch;
}

.page-cta__text {
    margin-top: var(--space-6);
    max-width: var(--measure-narrow);
    font-size: var(--fs-lg);
    line-height: var(--lh-normal);
    color: var(--color-text-muted);
}

.page-cta .btn {
    flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   Work - case studies
   -------------------------------------------------------------------------- */

.case-list {
    border-top: var(--border-strong);
}

.case {
    display: grid;
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: var(--space-8) var(--grid-gap);
    padding-block: var(--space-16);
    border-bottom: var(--border-default);
    scroll-margin-top: var(--header-height);
}

.case__aside {
    grid-column: 1 / span 4;
    display: grid;
    align-content: start;
    gap: var(--space-4);
}

.case__category {
    font-size: var(--fs-xs);
    font-weight: var(--fw-semibold);
    letter-spacing: var(--ls-caps);
    text-transform: uppercase;
    color: var(--color-link);
}

.case__visual {
    position: relative;
    aspect-ratio: 16 / 10;
    margin-top: var(--space-4);
    overflow: hidden;
    border-radius: 6px;
    border: 1px solid var(--color-border);
    background:
        radial-gradient(90% 80% at 70% 15%, rgba(var(--rgb-accent), 0.14), transparent 60%),
        linear-gradient(160deg, #141A21, #0B0F14);
    rotate: var(--tilt, 1 0 0 0deg);
    transition: rotate 1.2s var(--ease-out);
}

.case {
    perspective: 1400px;
}

.case__visual.is-tilting {
    transition: rotate 0.25s linear;
}

.case__visual svg {
    width: 100%;
    height: 100%;
}

.case__visual-grid {
    fill: none;
    stroke: var(--color-border);
}

.case__visual-mark {
    fill: none;
    stroke: var(--color-border-strong);
    stroke-width: 1.5;
}

.case__visual-core {
    fill: var(--color-accent);
}

.case__body {
    grid-column: 5 / -1;
    display: grid;
    gap: var(--space-8);
}

.case__title {
    font-size: var(--fs-2xl);
}

.case__summary {
    max-width: var(--measure);
}

.case__story {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-8) var(--grid-gap);
    padding-top: var(--space-8);
    border-top: var(--border-default);
}

.case__story h3 {
    margin-bottom: var(--space-3);
    font-family: var(--font-body);
    font-size: var(--fs-xs);
    font-weight: var(--fw-semibold);
    letter-spacing: var(--ls-caps);
    text-transform: uppercase;
    color: var(--color-text-muted);
}

.case__story p {
    font-size: var(--fs-sm);
    line-height: var(--lh-relaxed);
}

.case__note {
    font-size: var(--fs-xs);
    color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   Services
   -------------------------------------------------------------------------- */

.service {
    display: grid;
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: var(--space-8) var(--grid-gap);
    padding-block: var(--space-section-sm);
    border-top: var(--border-default);
    scroll-margin-top: calc(var(--header-height) + var(--services-nav-stuck-height, 5.5rem) + var(--space-4));
}

.service:first-child {
    border-top: 0;
}

.service__head {
    grid-column: 1 / span 4;
    display: grid;
    align-content: start;
    gap: var(--space-4);
}

.service__title {
    font-size: var(--fs-2xl);
}

.service__body {
    grid-column: 5 / -1;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-10) var(--grid-gap);
}

.service__lead {
    grid-column: 1 / -1;
    max-width: var(--measure);
}

.service__group h4 {
    margin-bottom: var(--space-4);
    font-family: var(--font-body);
    font-size: var(--fs-xs);
    font-weight: var(--fw-semibold);
    letter-spacing: var(--ls-caps);
    text-transform: uppercase;
    color: var(--color-text-muted);
}

.service__group p {
    font-size: var(--fs-sm);
}

/* Approach - five ordered steps */
.steps {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: var(--grid-gap);
    counter-reset: step;
}

.steps li {
    display: grid;
    align-content: start;
    gap: var(--space-3);
    padding-top: var(--space-6);
    border-top: var(--border-strong);
}

.steps li:first-child {
    --line-color: var(--color-accent);
    border-top-color: var(--color-accent);
}

.steps h3 {
    font-size: var(--fs-lg);
}

.steps p {
    font-size: var(--fs-sm);
}

.steps .facts {
    margin-top: var(--space-3);
    grid-template-columns: 1fr;
    gap: var(--space-3);
}

/* Engagement models */
.engagements {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--grid-gap);
}

.engagement {
    display: grid;
    align-content: start;
    gap: var(--space-4);
    padding-top: var(--space-6);
    border-top: var(--border-strong);
}

.engagement p {
    max-width: var(--measure-narrow);
}

.engagement h3 {
    font-size: var(--fs-lg);
}

.engagement p {
    font-size: var(--fs-sm);
}

/* --------------------------------------------------------------------------
   About
   -------------------------------------------------------------------------- */

.statement {
    display: grid;
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: var(--space-10) var(--grid-gap);
}

.statement__text {
    grid-column: 1 / span 8;
    font-family: var(--font-display);
    font-size: var(--fs-2xl);
    font-weight: var(--fw-semibold);
    line-height: var(--lh-snug);
    letter-spacing: var(--ls-tight);
    color: var(--color-text);
}

.statement__text em {
    font-style: normal;
    color: var(--color-link);
}

.statement__body {
    grid-column: 5 / -1;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-6) var(--grid-gap);
}

.principles {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 var(--grid-gap);
    border-top: var(--border-strong);
}

.principle {
    display: grid;
    grid-template-columns: var(--space-16) minmax(0, 1fr);
    gap: var(--space-4);
    padding-block: var(--space-8);
    border-bottom: var(--border-default);
}

.principle h3 {
    margin-bottom: var(--space-3);
    font-size: var(--fs-lg);
}

.principle p {
    font-size: var(--fs-sm);
    max-width: var(--measure-narrow);
}

.focus-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--grid-gap);
}

.focus-area {
    display: grid;
    align-content: start;
    gap: var(--space-4);
    padding-top: var(--space-6);
    border-top: var(--border-strong);
}

.focus-area h3 {
    font-size: var(--fs-xl);
}

.focus-area p {
    font-size: var(--fs-sm);
}

.theme-dark .focus-area {
    --line-color: var(--color-border);
    border-top-color: var(--color-border);
}

.theme-dark .focus-area:first-child {
    --line-color: var(--color-accent);
    border-top-color: var(--color-accent);
}

/* --------------------------------------------------------------------------
   Contact
   -------------------------------------------------------------------------- */

.contact {
    display: grid;
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: var(--space-16) var(--grid-gap);
}

.contact__aside {
    grid-column: 1 / span 4;
    display: grid;
    align-content: start;
    gap: var(--space-12);
}

.contact__block h2 {
    margin-bottom: var(--space-4);
    font-family: var(--font-body);
    font-size: var(--fs-xs);
    font-weight: var(--fw-semibold);
    letter-spacing: var(--ls-caps);
    text-transform: uppercase;
    color: var(--color-text-muted);
}

.contact__email {
    font-family: var(--font-display);
    font-size: var(--fs-lg);
    font-weight: var(--fw-semibold);
    letter-spacing: var(--ls-tight);
    color: var(--color-text);
}

.contact__steps {
    display: grid;
    border-top: var(--border-default);
}

.contact__steps li {
    display: grid;
    grid-template-columns: var(--space-10) minmax(0, 1fr);
    gap: var(--space-2);
    padding-block: var(--space-4);
    font-size: var(--fs-sm);
    line-height: var(--lh-normal);
    border-bottom: var(--border-default);
}

.contact__form {
    grid-column: 6 / -1;
    --panel-padding: clamp(1.5rem, 0.8333rem + 2.963vw, 3rem);
}

.form-grid {
    margin-top: var(--space-8);
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-6) var(--space-6);
}

.form-grid .field--full {
    grid-column: 1 / -1;
}

.field__required {
    color: var(--color-link);
}

.form-footer {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4) var(--space-8);
    margin-top: var(--space-8);
    padding-top: var(--space-6);
    border-top: var(--border-default);
}

.form-footer__note {
    max-width: 38ch;
    font-size: var(--fs-xs);
    line-height: var(--lh-normal);
    color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */

@media (max-width: 1023.98px) {
    .page-intro__head,
    .page-intro__lead,
    .case__aside,
    .case__body,
    .service__head,
    .service__body,
    .statement__text,
    .statement__body,
    .contact__aside,
    .contact__form {
        grid-column: 1 / -1;
    }

    .section-head {
        grid-template-columns: minmax(0, 1fr);
        grid-template-areas: "label" "title" "text";
        margin-bottom: var(--space-12);
    }

    .facts--ruled {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .case__aside {
        grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
        align-items: start;
    }

    .case__visual {
        grid-column: 2;
        grid-row: 1 / span 3;
        margin-top: 0;
    }

    .steps {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        row-gap: var(--space-10);
    }

    .focus-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        row-gap: var(--space-10);
    }

    .contact__aside {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: var(--space-10) var(--grid-gap);
        order: 2;
    }
}

@media (max-width: 767.98px) {
    .page-intro {
        padding-block: var(--space-12) var(--space-10);
    }

    .case {
        padding-block: var(--space-12);
    }

    .case__aside {
        grid-template-columns: minmax(0, 1fr);
    }

    .case__visual {
        grid-column: auto;
        grid-row: auto;
    }

    .case__story,
    .service__body,
    .statement__body,
    .principles,
    .engagements,
    .facts--ruled,
    .contact__aside,
    .form-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .steps,
    .focus-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .principle {
        grid-template-columns: var(--space-10) minmax(0, 1fr);
        padding-block: var(--space-6);
    }

    .form-footer .btn {
        width: 100%;
    }
}

/* --------------------------------------------------------------------------
   Contact - "Plan your system" brief builder (js/brief.js)
   -------------------------------------------------------------------------- */

.brief {
    display: grid;
    gap: var(--space-4);
    margin: var(--space-8) 0;
    padding: 0 0 var(--space-8);
    border: 0;
    border-bottom: var(--border-default);
    min-width: 0;
}

.brief__legend {
    display: flex;
    align-items: baseline;
    gap: var(--space-3);
    padding: 0;
    font-family: var(--font-display);
    font-size: var(--fs-lg);
    font-weight: var(--fw-bold);
    color: var(--color-text);
}

.brief__legend span {
    font-family: var(--font-body);
    font-size: var(--fs-xs);
    font-weight: var(--fw-medium);
    letter-spacing: var(--ls-caps);
    text-transform: uppercase;
    color: var(--color-text-muted);
}

.brief__hint {
    font-size: var(--fs-sm);
    color: var(--color-text-muted);
}

.brief__layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.3fr);
    gap: var(--space-6);
    align-items: start;
}

.brief__options {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.brief__chip {
    position: relative;
}

.brief__chip input {
    position: absolute;
    inset: 0;
    margin: 0;
    opacity: 0;
    cursor: pointer;
}

.brief__chip span {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    min-height: 40px;
    padding: 0 var(--space-4);
    border: var(--border-default);
    font-size: var(--fs-sm);
    font-weight: var(--fw-medium);
    transition: background-color var(--motion-tone), border-color var(--motion-tone), color var(--motion-tone);
}

.brief__chip span::before {
    content: "+";
    font-weight: var(--fw-semibold);
    color: var(--color-accent);
}

.brief__chip input:checked + span {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: var(--color-on-accent);
}

.brief__chip input:checked + span::before {
    content: "✓";
    color: inherit;
}

.brief__chip input:hover + span {
    border-color: var(--color-accent);
}

.brief__chip input:focus-visible + span {
    outline: var(--focus-ring);
    outline-offset: var(--focus-offset);
}

.brief__diagram {
    background: var(--color-surface);
    border: var(--border-default);
}

.brief__diagram svg {
    display: block;
    width: 100%;
    height: auto;
}

.brief__summary {
    font-size: var(--fs-sm);
    color: var(--color-text-body);
}

.brief__summary strong {
    color: var(--color-text);
}

.br-boundary { fill: none; stroke: rgba(var(--rgb-warm), 0.18); stroke-dasharray: 3 5; }
.br-label { fill: rgba(var(--rgb-warm), 0.55); font-family: var(--font-body); font-size: 9px; letter-spacing: 1.6px; }
.br-node { transition: opacity 0.4s, transform 0.5s var(--ease-out); transform-box: fill-box; transform-origin: center; }
.br-node rect { fill: var(--color-surface); stroke: rgba(var(--rgb-warm), 0.45); }
.br-node text { fill: var(--color-text); font-family: var(--font-body); font-size: 11px; font-weight: 600; text-anchor: middle; }
.br-node.is-off { opacity: 0.14; transform: scale(0.88); }
.br-core rect { fill: var(--color-surface); stroke: var(--ct-ember); stroke-width: 1.5; }
.br-core text { fill: var(--color-text); font-family: var(--font-display); font-size: 12px; font-weight: 700; text-anchor: middle; }
.br-edge { fill: none; stroke: var(--ct-ember); stroke-width: 1.2; transition: stroke-dashoffset 0.6s var(--ease-in-out) 0.1s; }
.br-packet { fill: var(--ct-ember); }

@media (max-width: 767.98px) {
    .brief__layout {
        grid-template-columns: 1fr;
    }
}


/* --------------------------------------------------------------------------
   Glass panels on inner pages
   -------------------------------------------------------------------------- */

.panel.glass-panel {
    background-color: transparent;
}

.principle.glass-panel {
    padding: var(--space-6);
    border-bottom: 1px solid transparent;
}

.service__body.glass-panel {
    padding: clamp(1.5rem, 1rem + 2vw, 2.5rem);
}

.principles:has(.glass-panel) {
    gap: var(--space-4);
    border-top: 0;
}

/* Case studies: a wider aside so the product interface reads at a glance. */
@media (min-width: 1024px) {
    .case__aside {
        grid-column: 1 / span 5;
    }

    .case__body {
        grid-column: 6 / -1;
    }
}

/* --------------------------------------------------------------------------
   Contact form states (js/contact-form.js)
   -------------------------------------------------------------------------- */

.form-footer__status {
    flex-basis: 100%;
    order: 3;
    font-size: var(--fs-sm);
    color: var(--color-text-body);
}

.form-footer__status:empty {
    display: none;
}

.form-footer__status.is-error {
    color: var(--color-accent);
}

.contact__form[aria-busy="true"] .btn {
    opacity: 0.6;
    pointer-events: none;
}

.form-sent {
    display: grid;
    gap: var(--space-4);
    padding-block: var(--space-8);
}

.form-sent__mark {
    width: 44px;
    height: 44px;
    color: var(--color-accent);
}

.form-sent__title {
    font-size: var(--fs-xl);
    letter-spacing: var(--ls-tight);
}

.form-sent__title:focus {
    outline: none;
}

.form-sent p {
    max-width: 46ch;
    color: var(--color-text-body);
}

/* --------------------------------------------------------------------------
   Contact form: brief handed over from a tool (contact-form.js)
   -------------------------------------------------------------------------- */

.tool-brief {
    display: grid;
    gap: var(--space-2);
    margin-top: var(--space-6);
    padding: var(--space-4);
    border: 1px solid rgba(var(--rgb-accent), 0.45);
    border-radius: 10px;
    background: rgba(var(--rgb-accent), 0.06);
}

.tool-brief__head {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.tool-brief__head b {
    font-weight: var(--fw-semibold);
    color: var(--color-text);
}

.tool-brief__title {
    font-size: var(--fs-sm);
    color: var(--color-text-body);
}

.tool-brief details summary {
    cursor: pointer;
    font-size: var(--fs-xs);
    color: var(--color-text-muted);
}

.tool-brief pre {
    max-height: 260px;
    margin: var(--space-2) 0 0;
    overflow: auto;
    font-family: var(--font-mono);
    font-size: 11.5px;
    line-height: 1.6;
    white-space: pre-wrap;
    color: var(--color-text-body);
}

.tool-brief__remove {
    padding: 0;
    border: 0;
    background: none;
    font-size: var(--fs-xs);
    color: var(--color-text-muted);
    text-decoration: underline;
    cursor: pointer;
}