/* ==========================================================================
   components.css — Northline Studio project components.
   New class names are marked (PROJECT); none collides with an exported class
   (verified against classes.json). Every color/space/typography value is an
   exported variable from variables.css / palette.css — never a literal — so
   the whole site recolors from palette.css + tools/generate_palette.py.
   ========================================================================== */

/* ---- buttons (PROJECT .btn* — consumes exported --btn-* tokens) ----------
   classes.json contains no button classes (the builder styles buttons inside
   its Button element); the token registry for buttons DOES exist in
   variables.json (Button, Button - Primary/Secondary/Light/Dark/Sizes), so
   this component resolves 1:1 to those exported names on migration. */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  padding-block: var(--btn-medium-padding-block);
  padding-inline: var(--btn-medium-padding-inline);
  border: var(--btn-border-width) solid transparent;
  border-radius: var(--btn-border-radius);
  box-shadow: var(--btn-shadow);
  font-family: var(--proj-font-body);
  font-size: var(--btn-medium-font-size);
  font-weight: 600;
  letter-spacing: 0.01em; /* PROJECT: builder button typography lives on its element, not in exported vars */
  text-decoration: none;
  cursor: pointer;
  transition: background-color 150ms ease, border-color 150ms ease, color 150ms ease;
}
.btn:hover { box-shadow: var(--btn-shadow--hover); }
.btn--sm {
  padding-block: var(--btn-small-padding-block);
  padding-inline: var(--btn-small-padding-inline);
  font-size: var(--btn-small-font-size);
}
.btn--lg {
  padding-block: var(--btn-large-padding-block);
  padding-inline: var(--btn-large-padding-inline);
  font-size: var(--btn-large-font-size);
}
.btn--primary {
  color: var(--btn-primary-color);
  background-color: var(--btn-primary-background);
  border-color: var(--btn-primary-border-color);
}
.btn--primary:hover {
  color: var(--btn-primary-color--hover);
  background-color: var(--btn-primary-background--hover);
  border-color: var(--btn-primary-border-color--hover);
}
.btn--secondary {
  color: var(--btn-secondary-color);
  background-color: var(--btn-secondary-background);
  border-color: var(--btn-secondary-border-color);
}
.btn--secondary:hover {
  color: var(--btn-secondary-color--hover);
  background-color: var(--btn-secondary-background--hover);
  border-color: var(--btn-secondary-border-color--hover);
}
.btn--dark {
  color: var(--btn-dark-color);
  background-color: var(--btn-dark-background);
}
.btn--dark:hover {
  color: var(--btn-dark-color--hover);
  background-color: var(--btn-dark-background--hover);
}
.btn--outline {
  color: var(--btn-primary-outline-color);
  background-color: var(--btn-primary-outline-background);
  border-color: var(--btn-primary-outline-border-color);
}
.btn--outline:hover {
  color: var(--btn-primary-outline-color--hover);
  background-color: var(--btn-primary-outline-background--hover);
  border-color: var(--btn-primary-outline-border-color--hover);
}

/* ---- eyebrow / kicker (PROJECT) ----------------------------------------- */
.eyebrow {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  font-family: var(--proj-font-body);
  font-size: var(--text-12);
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--primary);
}
.eyebrow::before {
  content: "";
  inline-size: var(--space-24);
  block-size: 0.2rem;
  background-color: var(--primary);
}

/* ---- header (PROJECT .site-header*; exported .nest-nav depends on Bricks
   nav markup + submenu runtime and is NOT usable standalone — see README
   "builder-only dependencies". This header keeps the same exported token
   names for every value so the builder nav can replace it after migration.) */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: color-mix(in srgb, var(--background) 92%, transparent);
  border-bottom: var(--border--standard);
  backdrop-filter: blur(0.8rem);
}
.site-header__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--nav-items-gap);
  block-size: var(--header-height);
}
.brand {
  display: flex;
  align-items: center;
  gap: var(--space-12);
  font-family: var(--proj-font-display);
  font-size: var(--text-20);
  font-weight: 700;
  line-height: var(--leading-none);
  color: var(--nav-item-text);
  text-decoration: none;
}
.brand:hover { color: var(--nav-item-text); }
.brand__mark {
  inline-size: var(--space-24);
  block-size: var(--space-24);
  flex-shrink: 0;
  border-radius: var(--radius-4);
  background:
    linear-gradient(135deg, var(--primary) 0 55%, transparent 55%),
    linear-gradient(135deg, transparent 0 45%, var(--secondary) 45%);
}
.site-nav__list {
  display: flex;
  align-items: center;
  gap: var(--nav-items-gap);
  margin: 0;
  padding: 0;
  list-style: none;
}
.site-nav__link {
  padding-block: var(--nav-top-item-padding-block);
  padding-inline: var(--nav-item-padding-inline);
  font-size: var(--nav-top-item-font-size);
  line-height: var(--nav-top-item-font-size);
  font-weight: 500;
  color: var(--nav-item-text);
  text-decoration: none;
}
.site-nav__link:hover { color: var(--nav-item-text-hover); }
/* current-page + hover underline ported from exported .nav--underline intent
   (its rules target .brx-nav-nested-items markup; the visual contract is a
   0.2rem --primary underline growing from center): */
.site-nav__link[aria-current="page"],
.site-nav__link.is-active {
  box-shadow: inset 0 -0.2rem 0 var(--primary);
}
.site-nav__actions { display: flex; align-items: center; gap: var(--space-16); }

.site-nav-toggle {
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
  padding: var(--space-8) var(--space-16);
  font: inherit;
  font-weight: 600;
  color: var(--nav-item-text);
  background: transparent;
  border: var(--border--standard);
  border-radius: var(--radius-full);
  cursor: pointer;
}
.site-nav-toggle .bars {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  inline-size: 1.8rem;
}
.site-nav-toggle .bars::before,
.site-nav-toggle .bars::after,
.site-nav-toggle .bars i {
  content: "";
  display: block;
  block-size: 0.2rem;
  border-radius: var(--radius-2);
  background-color: currentColor;
}
@media (max-width: 991px) {
  .site-nav-toggle { display: flex; }
  .site-nav {
    position: fixed;
    inset: var(--header-height) 0 auto 0;
    block-size: calc(100dvh - var(--header-height));
    background-color: var(--nav-mobile-static-dropdown-bg);
    border-block-start: var(--nav-border-default);
    overflow-y: auto;
    visibility: hidden;
    transform: translateY(-1rem);
    opacity: 0;
    transition: opacity 200ms ease, transform 200ms ease, visibility 200ms;
  }
  .js .site-nav.is-open { visibility: visible; transform: none; opacity: 1; }
  .site-nav__list { flex-direction: column; align-items: stretch; gap: 0; padding: var(--space-16) 0; }
  .site-nav__link { display: block; font-size: var(--text-20); padding: var(--nav-item-padding-block) var(--gutter); }
  .site-nav__actions { flex-direction: column; align-items: stretch; padding: 0 var(--gutter) var(--space-32); }
}
@media (prefers-reduced-motion: reduce) {
  .site-nav { transition: none; }
}

/* ---- cards (PROJECT .card*) --------------------------------------------- */
.card {
  display: flex;
  flex-direction: column;
  gap: var(--card-gap, var(--space-16));
  padding: var(--card-padding, var(--space-24));
  background-color: var(--card);
  border: var(--border--standard);
  border-radius: var(--card-radius, var(--radius-16));
  box-shadow: var(--shadow-1);
}
.card--plain { box-shadow: none; }
.card__link { text-decoration: none; color: inherit; }
.card__link:hover .card__title { color: var(--primary); }
.card__title {
  font-family: var(--proj-font-display);
  font-size: var(--h4);
  line-height: var(--leading-tight);
  color: var(--heading);
}
.card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-8);
  align-items: center;
  font-size: var(--text-12);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}
.card__media {
  border-radius: var(--radius-12);
  overflow: hidden; /* exported utility class also applied in markup */
}
.card__arrow { transition: transform 150ms ease; }
.card__link:hover .card__arrow { transform: translateX(0.4rem); }

/* ---- tag chips (PROJECT .tag) ------------------------------------------- */
.tag {
  display: inline-block;
  padding: 0.4rem var(--space-12);
  font-size: var(--text-12);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--primary-dark);
  background-color: var(--primary-ultra-light);
  border-radius: var(--radius-full);
}

/* ---- filter bar (PROJECT .filters*) ------------------------------------- */
.filters__list { display: flex; flex-wrap: wrap; gap: var(--space-12); }
.filters__btn {
  padding: 0.8rem var(--space-20);
  font: inherit;
  font-size: var(--text-14);
  font-weight: 600;
  color: var(--muted-dark);
  background-color: transparent;
  border: var(--border--standard);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: color 150ms ease, background-color 150ms ease;
}
.filters__btn:hover { color: var(--primary); border-color: var(--primary); }
.filters__btn[aria-pressed="true"] {
  color: var(--btn-primary-color);
  background-color: var(--btn-primary-background);
  border-color: var(--btn-primary-background);
}
.filters__count { color: var(--muted); }

/* ---- forms (PROJECT .form*; consumes exported --form-* tokens) ---------- */
.form__group {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
  padding-inline: 0;
  padding-block: var(--form-group-padding-block);
}
.form__label {
  font-size: var(--form-label-font-size);
  font-weight: 600;
  color: var(--form-label-color);
}
.form__hint { font-size: var(--text-12); color: var(--muted); }
.form__input {
  inline-size: 100%;
  padding-inline: var(--form-input-padding-inline);
  padding-block: var(--form-input-padding-block);
  font: inherit;
  font-size: var(--form-input-font-size);
  line-height: var(--form-input-line-height);
  color: var(--form-input-color);
  background-color: var(--form-input-background-color);
  border: var(--form-input-border-width) solid var(--form-input-border-color);
  border-radius: var(--form-input-border-radius);
}
.form__input::placeholder { color: var(--form-placeholder-color); font-size: var(--form-placeholder-font-size); }
.form__input:focus {
  outline: 0.2rem solid var(--form-focus-outline-color);
  outline-offset: 0;
  color: var(--form-input-color--focus);
  background-color: var(--form-input-background-color--focus);
}
.form__input[aria-invalid="true"] { border-color: var(--form-invalid-color); }
.form__error { font-size: var(--text-14); color: var(--form-invalid-color); }
.form__status {
  padding: var(--space-16);
  border-radius: var(--radius);
  font-size: var(--text-14);
}
.form__status[data-state="notice"] {
  background-color: var(--muted-ultra-light);
  color: var(--muted-dark);
  border: var(--border-width) solid var(--muted-l-4);
}
.form__status[data-state="error"] {
  background-color: var(--danger);
  color: var(--danger-foreground);
}

/* ---- FAQ: native <details> (no JS needed; works without scripts) -------- */
.faq__item {
  border-block-end: var(--border--standard);
}
.faq__item summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-16);
  padding-block: var(--space-20);
  font-family: var(--proj-font-display);
  font-size: var(--h5);
  font-weight: 600;
  color: var(--heading);
  cursor: pointer;
  list-style: none;
}
.faq__item summary::-webkit-details-marker { display: none; }
.faq__item summary::after {
  content: "+";
  flex-shrink: 0;
  font-size: var(--text-24);
  color: var(--primary);
  transition: transform 150ms ease;
}
.faq__item[open] summary::after { content: "–"; }
.faq__answer {
  padding-block-end: var(--space-24);
  max-inline-size: 72ch;
  color: var(--body);
}

/* ---- process component (exported classes .process-grid/.process-card).
   The export references --counter-size/--body-text-28/--mask which are
   undefined in variables.json; defining --mask completes the exported
   masked-border rule (border visible except behind the numbered disc). */
/* Exported .process-card__description ships with EMPTY settings in
   classes.json (builder-assigned styling was never stored). Styled here
   under the original name so the markup class resolves. */
.process-card__description { color: var(--body); }
.process-card {
  --mask: radial-gradient(circle at 50% 0, transparent var(--counter-size, 6.4rem), #000 calc(var(--counter-size, 6.4rem) + 1px));
}

/* ---- CTA band (PROJECT .cta-band) --------------------------------------- */
.cta-band {
  background:
    radial-gradient(90rem 40rem at 110% -20%, var(--primary-t-2), transparent 60%),
    var(--dark);
  border-radius: var(--radius-24);
}

/* ---- footer (PROJECT .footer*) ------------------------------------------- */
.footer .btn--outline { color: var(--light); border-color: var(--light); }
.footer .btn--outline:hover { color: var(--light-l-2); border-color: var(--light-l-2); }
.footer {
  background-color: var(--dark-d-1);
  color: var(--light);
}
.footer a { color: var(--light-l-4); text-decoration: none; }
.footer a:hover { color: var(--light); text-decoration: underline; }
.footer__rule { border-block-start: 1px solid var(--dark-l-2); }

/* ---- prose (PROJECT .prose; long-form text for insights/privacy) -------- */
.prose {
  max-inline-size: 72ch;
  color: var(--body);
}
.prose h2, .prose h3 { margin-block: var(--heading-spacing) var(--space-12); }
.prose p + p, .prose ul + p { margin-block-start: var(--paragraph-spacing); }
.prose ul { padding-inline-start: var(--list-indent-spacing); }

/* ---- table (PROJECT .table; services fit-criteria, case-study specs) ---- */
.table { inline-size: 100%; border-collapse: collapse; font-size: var(--text-16); }
.table th, .table td {
  text-align: start;
  padding: var(--space-12) var(--space-16);
  border-block-end: var(--border--standard);
}
.table th { color: var(--heading); font-weight: 600; }
.table td { color: var(--body); }

/* ---- no-JS honesty guard: interactive affordances hidden until wired --- */
html:not(.js) .site-nav-toggle { display: none; }
@media (min-width: 992px) {
  html:not(.js) .site-nav { display: flex; }
}
@media (max-width: 991px) {
  html:not(.js) .site-nav {
    position: static;
    block-size: auto;
    visibility: visible;
    opacity: 1;
    transform: none;
    border: 0;
    background: transparent;
  }
  html:not(.js) .site-nav__list { flex-wrap: wrap; padding: var(--space-12) 0; }
  html:not(.js) .site-nav__link { padding-inline: var(--space-8); font-size: var(--text-14); }
}