/* ============================================================================
   components.css  —  buttons, cards, forms, tags, badges, callouts
   ----------------------------------------------------------------------------
   Each component is self-contained. Modifiers use BEM --modifier naming.
============================================================================ */

/* ============================================================================
   Button
============================================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  font-family: inherit;
  font-weight: var(--font-weight-semi);
  font-size: var(--step-0);
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
  transition: background var(--duration-fast) var(--ease-standard),
              color var(--duration-fast) var(--ease-standard),
              border-color var(--duration-fast) var(--ease-standard),
              transform var(--duration-fast) var(--ease-standard);
}
.btn:disabled, .btn[aria-disabled="true"] {
  opacity: 0.55;
  cursor: not-allowed;
}
.btn:active { transform: translateY(1px); }
.btn:focus-visible { box-shadow: var(--shadow-focus); outline: none; }

/* Primary: accent red pill */
.btn--primary {
  background: var(--color-accent);
  color: var(--color-accent-ink);
  border-color: var(--color-accent);
}
.btn--primary:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: var(--color-accent-ink);
}

/* Secondary: outlined */
.btn--secondary {
  background: transparent;
  color: var(--color-fg);
  border-color: var(--color-border-strong);
}
.btn--secondary:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

/* Ghost: minimal */
.btn--ghost {
  background: transparent;
  color: var(--color-fg);
  border-color: transparent;
}
.btn--ghost:hover { color: var(--color-accent); }

/* Inverse (for dark sections) */
.section--ink .btn--secondary {
  color: var(--color-paper);
  border-color: color-mix(in srgb, var(--color-paper) 40%, transparent);
}
.section--ink .btn--secondary:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
}
.section--ink .btn--ghost {
  color: var(--color-paper);
  border-color: transparent;
}
.section--ink .btn--ghost:hover {
  color: var(--color-accent);
}

/* Sizes */
.btn--sm { padding: var(--space-2) var(--space-4); font-size: var(--step--1); }
.btn--lg { padding: var(--space-4) var(--space-6); font-size: var(--step-1); }

/* Arrow suffix */
.btn__arrow {
  display: inline-block;
  transition: transform var(--duration-fast) var(--ease-standard);
}
.btn:hover .btn__arrow { transform: translateX(3px); }

/* ============================================================================
   Card
============================================================================ */
.card {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-6);
  background: var(--color-paper);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-3);
  transition: border-color var(--duration-fast) var(--ease-standard),
              box-shadow var(--duration-fast) var(--ease-standard),
              transform var(--duration-fast) var(--ease-standard);
  text-decoration: none;
  color: inherit;
}
a.card:hover,
.card--linked:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-2);
  transform: translateY(-2px);
}
.card__eyebrow {
  font-size: var(--step--1);
  color: var(--color-accent);
  font-weight: var(--font-weight-semi);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.card__title {
  font-size: var(--step-2);
  font-weight: var(--font-weight-semi);
  line-height: var(--line-height-snug);
  margin: 0;
}
.card__body {
  color: var(--color-fg-muted);
  line-height: var(--line-height-normal);
  flex: 1;
}
.card__footer {
  margin-top: var(--space-3);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-accent);
  font-weight: var(--font-weight-semi);
}

/* Card — solution/platform (compact tile) */
.card--tile {
  padding: var(--space-5);
  gap: var(--space-2);
}
.card--tile .card__title { font-size: var(--step-1); }

/* Card — customer (case study preview) */
.card--customer {
  padding: 0;
  overflow: hidden;
}
.card--customer .card__image {
  aspect-ratio: 16 / 9;
  background: var(--color-paper-soft);
  object-fit: cover;
  width: 100%;
}
.card--customer .card__body { padding: var(--space-5) var(--space-6) var(--space-6); }

/* Card — stat */
.stat {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-5) 0;
  border-top: 3px solid var(--color-accent);
}
.stat__value {
  font-size: var(--step-6);
  font-weight: var(--font-weight-bold);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--color-fg);
}
.stat__label {
  color: var(--color-fg-muted);
  font-size: var(--step-0);
  line-height: var(--line-height-snug);
}

/* ============================================================================
   Tag / Badge / Pill
============================================================================ */
.tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 0.25rem 0.7rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  font-size: var(--step--1);
  font-weight: var(--font-weight-medium);
  color: var(--color-fg-muted);
  background: var(--color-paper);
  text-decoration: none;
}
.tag:hover { border-color: var(--color-accent); color: var(--color-accent); }
.tag--filled { background: var(--color-accent-soft); color: var(--color-accent); border-color: transparent; }
.tag--ink { background: var(--color-ink); color: var(--color-paper); border-color: transparent; }

/* ============================================================================
   Callout / Quote block
============================================================================ */
.callout {
  padding: var(--space-6);
  background: var(--color-bg-alt);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-3);
}
.callout--inverse {
  background: var(--color-ink);
  color: var(--color-paper);
  border-left-color: var(--color-accent);
}

.pullquote {
  font-size: var(--step-3);
  line-height: var(--line-height-snug);
  font-weight: var(--font-weight-medium);
  color: var(--color-fg);
  padding-block: var(--space-6);
}
.pullquote::before {
  content: "“";
  font-size: var(--step-6);
  color: var(--color-accent);
  display: block;
  line-height: 0.6;
  margin-bottom: var(--space-2);
}
.pullquote__cite {
  display: block;
  margin-top: var(--space-4);
  font-size: var(--step-0);
  font-weight: var(--font-weight-regular);
  color: var(--color-fg-muted);
  font-style: normal;
}

/* ============================================================================
   Form elements
============================================================================ */
.form { display: grid; gap: var(--space-5); max-width: 32rem; }
.form--inline { max-width: none; }

.form__row {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.form__row--split {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 1fr;
}
@media (min-width: 40em) {
  .form__row--split { grid-template-columns: 1fr 1fr; }
}

.form__label {
  font-weight: var(--font-weight-medium);
  color: var(--color-fg);
  font-size: var(--step--1);
}
.form__label .required { color: var(--color-accent); margin-left: 2px; }

.form__input,
.form__select,
.form__textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-2);
  background: var(--color-paper);
  color: var(--color-fg);
  font: inherit;
  transition: border-color var(--duration-fast) var(--ease-standard),
              box-shadow var(--duration-fast) var(--ease-standard);
}
.form__input:focus,
.form__select:focus,
.form__textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: var(--shadow-focus);
}
.form__textarea { resize: vertical; min-height: 8rem; }

.form__help {
  color: var(--color-fg-quiet);
  font-size: var(--step--1);
}
.form__error {
  color: var(--color-danger);
  font-size: var(--step--1);
}

.form__checkbox, .form__radio {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  font-size: var(--step--1);
}
.form__checkbox input, .form__radio input {
  margin-top: 0.18em;
  accent-color: var(--color-accent);
}

.form__submit { justify-self: start; }

/* ============================================================================
   Media blocks
============================================================================ */
.media-block {
  display: grid;
  gap: var(--space-7);
  align-items: center;
}
@media (min-width: 60em) {
  .media-block { grid-template-columns: 1fr 1fr; gap: var(--space-9); }
  .media-block--reverse > :first-child { order: 2; }
}
.media-block__figure {
  border-radius: var(--radius-3);
  overflow: hidden;
  background: var(--color-bg-alt);
}
.media-block__figure img,
.media-block__figure svg { width: 100%; height: auto; display: block; }

/* ============================================================================
   Logo rail (customer logos strip)
============================================================================ */
.logo-rail {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-5);
  align-items: center;
  justify-items: center;
  padding-block: var(--space-6);
}
@media (min-width: 40em) { .logo-rail { grid-template-columns: repeat(4, 1fr); } }
@media (min-width: 60em) { .logo-rail { grid-template-columns: repeat(6, 1fr); } }
.logo-rail img {
  max-height: 2.75rem;
  width: auto;
  filter: grayscale(100%) contrast(0.7);
  opacity: 0.75;
  transition: filter var(--duration-med) var(--ease-standard),
              opacity var(--duration-med) var(--ease-standard);
}
.logo-rail img:hover { filter: none; opacity: 1; }
.logo-rail__text {
  font-weight: var(--font-weight-semi);
  font-size: var(--step-1);
  color: var(--color-fg-quiet);
}

/* ============================================================================
   Post / article list (blog, case studies)
============================================================================ */
.post-list {
  display: grid;
  gap: var(--space-6);
  list-style: none;
  padding: 0;
  margin: 0;
}
@media (min-width: 40em) { .post-list { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 60em) { .post-list { grid-template-columns: repeat(3, 1fr); gap: var(--space-7); } }

.post-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  text-decoration: none;
  color: inherit;
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-3);
  background: var(--color-paper);
  transition: border-color var(--duration-fast) var(--ease-standard),
              transform var(--duration-fast) var(--ease-standard),
              box-shadow var(--duration-fast) var(--ease-standard);
}
.post-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-2);
}
.post-card__meta {
  font-size: var(--step--1);
  color: var(--color-fg-quiet);
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}
.post-card__title {
  font-size: var(--step-1);
  font-weight: var(--font-weight-semi);
  line-height: var(--line-height-snug);
  color: var(--color-fg);
}
.post-card__excerpt { color: var(--color-fg-muted); }
.post-card__footer { color: var(--color-accent); font-weight: var(--font-weight-semi); margin-top: auto; }

/* ============================================================================
   Pagination
============================================================================ */
.pagination {
  display: flex;
  gap: var(--space-2);
  justify-content: center;
  margin-top: var(--space-8);
  list-style: none;
  padding: 0;
}
.pagination a, .pagination span {
  display: inline-grid;
  place-items: center;
  min-width: 2.5rem;
  height: 2.5rem;
  padding: 0 var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2);
  color: var(--color-fg);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
}
.pagination a:hover { border-color: var(--color-accent); color: var(--color-accent); }
.pagination [aria-current="page"] {
  background: var(--color-ink);
  color: var(--color-paper);
  border-color: var(--color-ink);
}

/* ============================================================================
   Steps (numbered process explanations — eg. "How DetectX works")
============================================================================ */
.steps {
  display: grid;
  gap: var(--space-6);
  counter-reset: step;
  list-style: none;
  padding: 0;
  margin: 0;
}
@media (min-width: 60em) {
  .steps--grid { grid-template-columns: repeat(3, 1fr); }
}
.steps li {
  counter-increment: step;
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-3);
  background: var(--color-paper);
  position: relative;
}
.steps li::before {
  content: counter(step, decimal-leading-zero);
  font-size: var(--step--1);
  font-weight: var(--font-weight-semi);
  color: var(--color-accent);
  letter-spacing: 0.1em;
  display: block;
  margin-bottom: var(--space-3);
}

/* ============================================================================
   Comparison table (V3-reserved but defined for parity if V1 uses it)
============================================================================ */
.compare {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  border-radius: var(--radius-3);
  overflow: hidden;
  border: 1px solid var(--color-border);
}
.compare th, .compare td {
  padding: var(--space-4) var(--space-5);
  vertical-align: top;
  border-bottom: 1px solid var(--color-border);
}
.compare tr:last-child td { border-bottom: none; }
.compare th {
  background: var(--color-bg-alt);
  text-align: left;
}
.compare td:first-child {
  width: 34%;
  font-weight: var(--font-weight-semi);
  background: var(--color-bg-alt);
}

/* ============================================================================
   Author / meta row (used on blog posts + case studies)
============================================================================ */
.byline {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-fg-muted);
  font-size: var(--step--1);
}
.byline__dot { width: 4px; height: 4px; background: currentColor; border-radius: 50%; opacity: 0.5; }

/* ============================================================================
   404 / error states
============================================================================ */
.error-page {
  min-height: 70vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: var(--space-8) var(--gutter);
}
.error-page__code {
  font-size: var(--step-6);
  font-weight: var(--font-weight-bold);
  letter-spacing: -0.05em;
  color: var(--color-accent);
}

/* ============================================================================
   Scroll-appear utility — CRITICAL for UX report fix
   ----------------------------------------------------------------------------
   The current site uses opacity:0 + in-view animations that never resolve for
   users who scroll past quickly, producing "blank section voids". We do NOT
   repeat that pattern. All content is visible by default. If a future designer
   wants scroll animations, they use this class which only applies when JS runs
   AND reduced-motion is disabled — failing visible-by-default, not invisible.
============================================================================ */
.reveal {
  /* deliberately empty — no opacity:0. Kept as a hook if an opt-in animation
     is wanted later; currently a no-op so content is always visible. */
}