/* ==========================================================================
   METRIX LAB - components.css
   Reusable UI atoms: buttons, cards, chips, glow border, icon, dividers.
   Load order: 3rd (after base.css).
   ========================================================================== */

/* ==========================================================================
   BUTTONS
   Base: .btn  - pill, medium weight, flex with optional inline SVG icon.
   Variants:
     .btn--primary  : solid orange fill + glow, hover lift. PRIMARY CTA.
     .btn--secondary: metallic outlined / transparent fill. Secondary action.
     .btn--ghost    : text-only with subtle hover wash. Tertiary / nav.
   Size mods: .btn--lg, .btn--sm. Full width: .btn--block.
   Icons: place inline <svg> (stroke="currentColor"); it inherits color.
   ========================================================================== */
.btn {
  --btn-pad-y: 0.8rem;
  --btn-pad-x: 1.5rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: var(--btn-pad-y) var(--btn-pad-x);
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: 0.01em;
  line-height: 1;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  user-select: none;
  text-decoration: none;
  transition:
    transform var(--dur-base) var(--ease-out),
    box-shadow var(--dur-base) var(--ease-out),
    background-color var(--dur-base) var(--ease-out),
    border-color var(--dur-base) var(--ease-out),
    color var(--dur-base) var(--ease-out);
}
/* Promote to a compositor layer only during interaction (brand rule: use
   will-change sparingly). A single translateY hover composites fine either way,
   but this hints the layer just-in-time and drops it when idle/off-screen. */
.btn:hover,
.btn:focus-visible {
  will-change: transform;
}
.btn svg {
  width: 1.15em;
  height: 1.15em;
  flex: none;
  transition: transform var(--dur-base) var(--ease-out);
}
.btn:active { transform: translateY(1px) scale(0.99); }

/* --- PRIMARY --- */
.btn--primary {
  background: var(--gradient-accent-h);
  background-size: 160% 100%;
  background-position: 0% 50%;
  color: var(--color-text-on-accent);
  box-shadow: var(--glow-orange-sm);
}
.btn--primary:hover {
  color: var(--color-text-on-accent);
  background-position: 100% 50%;
  transform: translateY(-3px);
  box-shadow: var(--glow-orange-lg);
}
.btn--primary:hover svg { transform: translateX(3px); }

/* --- SECONDARY (metallic / outlined) --- */
.btn--secondary {
  background-color: transparent;
  color: var(--color-text);
  border-color: var(--color-grey-600);
  box-shadow: inset 0 0 0 0 rgba(234, 88, 12, 0);
}
.btn--secondary:hover {
  color: var(--color-text);
  border-color: var(--color-accent);
  transform: translateY(-3px);
  box-shadow: var(--glow-orange-sm);
  background-color: var(--color-accent-tint);
}

/* --- GHOST (text / tertiary) --- */
.btn--ghost {
  background-color: transparent;
  color: var(--color-text-muted);
  padding-inline: var(--space-md);
}
.btn--ghost:hover {
  color: var(--color-accent);
  background-color: var(--color-accent-tint);
}

/* --- SIZES --- */
.btn--lg { --btn-pad-y: 1.05rem; --btn-pad-x: 2rem; font-size: var(--fs-body); }
.btn--sm { --btn-pad-y: 0.55rem; --btn-pad-x: 1.1rem; font-size: var(--fs-xs); }
.btn--block { display: flex; width: 100%; }

/* ==========================================================================
   CARDS
   .card           : base dark surface, metallic 1px border, radius, padding.
   .card--service  : service card preset (taller, icon at top, hover glow).
   .glow-border    : utility - on hover, border turns orange + orange box glow.
   .card--lift     : hover translateY lift (applied to .card by default too).
   Compose:  <article class="card card--service glow-border" data-reveal> ...
   ========================================================================== */
.card {
  position: relative;
  display: flex;
  flex-direction: column;
  background-color: var(--color-surface);
  border: 1px solid var(--border-color-soft);
  border-radius: var(--radius-card);
  padding: var(--space-xl);
  color: var(--color-text-body);
  transition:
    transform var(--dur-base) var(--ease-out),
    border-color var(--dur-base) var(--ease-out),
    box-shadow var(--dur-base) var(--ease-out),
    background-color var(--dur-base) var(--ease-out);
  overflow: hidden;
}
.card > * { position: relative; z-index: 1; }

/* default hover lift for any card */
.card:hover {
  transform: translateY(-6px);
  border-color: var(--color-grey-600);
  box-shadow: var(--shadow-card);
}

/* service card preset */
.card--service {
  padding: clamp(1.5rem, 1rem + 2vw, 2.5rem);
  gap: var(--space-md);
}
.card--service .card__title {
  font-family: var(--font-heading);
  font-size: var(--fs-h3);
  color: var(--color-text);
  letter-spacing: var(--tracking-tight);
}
.card--service .card__text {
  color: var(--color-text-muted);
  font-size: var(--fs-body);
}

/* shared card sub-parts (optional helpers) */
.card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3.25rem;
  height: 3.25rem;
  border-radius: var(--radius-md);
  background: var(--color-accent-tint);
  border: 1px solid var(--color-accent-tint-2);
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
  transition: background-color var(--dur-base) var(--ease-out), color var(--dur-base) var(--ease-out);
}
.card__icon svg { width: 1.5rem; height: 1.5rem; }
.card__title { margin: 0; }
.card__text { margin: 0; line-height: var(--lh-body); }

/* GLOW BORDER utility - the signature neon-orange hover reveal */
.glow-border {
  border-color: var(--color-grey-700);
}
.glow-border:hover {
  border-color: var(--color-accent);
  box-shadow: var(--glow-orange);
}
.glow-border:hover .card__icon {
  background: var(--color-accent);
  color: var(--color-text-on-accent);
}

/* a faint gradient sheen revealed on hover (decorative, behind content) */
.card--service::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background: radial-gradient(120% 80% at 50% -10%, var(--color-accent-tint), transparent 60%);
  opacity: 0;
  transition: opacity var(--dur-slow) var(--ease-out);
  pointer-events: none;
}
.card--service:hover::after { opacity: 1; }

/* ==========================================================================
   CHIP / TAG / PILL
   .chip  - small rounded label. .chip--accent for orange-tinted variant.
   ========================================================================== */
.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2xs);
  padding: 0.4rem 0.85rem;
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--color-text-muted);
  background-color: var(--color-surface-2);
  border: 1px solid var(--border-color-soft);
  border-radius: var(--radius-pill);
  white-space: nowrap;
  transition: color var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out);
}
.chip svg { width: 1em; height: 1em; }
.chip--accent {
  color: var(--color-accent);
  background-color: var(--color-accent-tint);
  border-color: var(--color-accent-tint-2);
}
.chip--dot::before {
  content: "";
  width: 0.45rem; height: 0.45rem;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: var(--glow-orange-sm);
}

/* ==========================================================================
   ICON WRAPPER (generic inline SVG sizing helper)
   .icon - set width/height; SVGs use stroke="currentColor".
   ========================================================================== */
.icon {
  display: inline-flex;
  width: 1.25rem;
  height: 1.25rem;
  flex: none;
  color: inherit;
}
.icon svg { width: 100%; height: 100%; }
.icon--lg { width: 2rem; height: 2rem; }

/* ==========================================================================
   DIVIDERS / HAIRLINES
   ========================================================================== */
.divider {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, transparent, var(--color-grey-700), transparent);
  margin-block: var(--space-2xl);
}
.divider--accent {
  background: var(--gradient-accent-h);
  opacity: 0.5;
}

/* ==========================================================================
   GRID HELPERS (optional convenience for section builders)
   .grid + .grid--2/3/4 ; auto-collapses to 1 col on mobile (mobile-first).
   ========================================================================== */
.grid {
  display: grid;
  gap: var(--space-xl);
  grid-template-columns: 1fr;
}
@media (min-width: 640px) {
  .grid--2, .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .grid--3 { grid-template-columns: repeat(3, 1fr); }
  .grid--4 { grid-template-columns: repeat(4, 1fr); }
}

/* ==========================================================================
   STAT / METRIC (key numbers - orange highlight)
   .stat__value uses gradient text; .stat__label muted.
   ========================================================================== */
.stat__value {
  font-family: var(--font-heading);
  font-size: var(--fs-h1);
  font-weight: 600;
  line-height: 1;
  letter-spacing: var(--tracking-tighter);
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--color-accent); /* true brand orange fallback */
}
/* forced-colors: keep the metric legible (gradient bg is dropped in HC mode) */
@media (forced-colors: active) {
  .stat__value {
    -webkit-text-fill-color: currentColor;
    background: none;
    color: CanvasText;
  }
}
.stat__label {
  margin-top: var(--space-xs);
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  letter-spacing: 0.01em;
}