/* ============================================================================
 * main.css — CarbForge brand site stylesheet
 *
 * Style lock: Modern Minimal (Spec §5.8).
 * Rules:
 *   - No shadows. Use 1px hairlines for separation.
 *   - No rounded corners above 2px.
 *   - EMBER (--color-accent) is reserved for CTAs, number highlights,
 *     hover underlines and focus rings. NEVER for body copy.
 *   - Use CSS logical properties everywhere so Arabic /ar/ flips for free.
 *   - Mobile-first. Breakpoints: 768px (tablet), 1024px (desktop).
 *
 * Load order expected: tokens.css -> reset.css -> main.css -> print.css
 * ========================================================================== */


/* ----------------------------------------------------------------------------
 * 1. Self-hosted Inter — see assets/fonts/INSTALL.md for file provisioning.
 *    Commented out by default so the build does not 404 before fonts land.
 *    Uncomment once Inter.var.woff2 is placed in assets/fonts/.
 * -------------------------------------------------------------------------- */

/*
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("../fonts/Inter.var.woff2") format("woff2-variations"),
       url("../fonts/Inter.var.woff2") format("woff2");
}
*/


/* ----------------------------------------------------------------------------
 * 2. Base — typography, focus, selection
 * -------------------------------------------------------------------------- */

html {
  -webkit-text-size-adjust: 100%;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  font-weight: var(--fw-regular);
  line-height: var(--lh-body);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: var(--fw-medium);
  line-height: var(--lh-tight);
  color: var(--color-text);
}

h1 { font-size: var(--fs-display-1); letter-spacing: -0.02em; }
h2 { font-size: var(--fs-display-2); letter-spacing: -0.015em; }
h3 { font-size: var(--fs-h3); }

p {
  max-inline-size: 65ch;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease);
}

/* In-body inline links — subtle underline on hover in EMBER */
main p a,
main li a {
  border-block-end: 1px solid transparent;
  transition: border-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}
main p a:hover,
main li a:hover {
  border-block-end-color: var(--color-accent);
  color: var(--color-accent);
}

::selection {
  background-color: var(--color-text);
  color: var(--color-bg);
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

hr {
  border: 0;
  border-block-start: var(--hairline);
  margin-block: var(--sp-6);
}


/* ----------------------------------------------------------------------------
 * 3. Layout — container, section rhythm
 * -------------------------------------------------------------------------- */

.container {
  max-inline-size: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

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

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

.section--bordered {
  border-block-start: var(--hairline);
}


/* ----------------------------------------------------------------------------
 * 4. Header — logo left, nav + language switcher right, transparent on BONE
 * -------------------------------------------------------------------------- */

.site-header {
  position: sticky;
  inset-block-start: 0;
  z-index: 50;
  background-color: var(--color-bg);
  border-block-end: var(--hairline);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  padding-block: var(--sp-3);
}

.site-header__logo {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-display);
  font-weight: var(--fw-semibold);
  font-size: 1.125rem;
  letter-spacing: 0.01em;
}

.site-header__logo img {
  block-size: 28px;
  inline-size: auto;
}

.site-nav {
  display: none;
}

.site-nav__list {
  display: flex;
  gap: var(--sp-5);
  list-style: none;
  padding: 0;
  margin: 0;
}

.site-nav__link {
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  color: var(--color-text);
  padding-block: var(--sp-2);
  border-block-end: 1px solid transparent;
  transition: border-color var(--dur-fast) var(--ease);
}
.site-nav__link:hover,
.site-nav__link[aria-current="page"] {
  border-block-end-color: var(--color-accent);
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}

/* Mobile menu toggle */
.site-header__menu-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  inline-size: 40px;
  block-size: 40px;
  color: var(--color-text);
}


/* ----------------------------------------------------------------------------
 * 5. Language switcher — dropdown with caret
 * -------------------------------------------------------------------------- */

.lang-switcher {
  position: relative;
}

.lang-switcher__trigger {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  padding: var(--sp-2) var(--sp-3);
  color: var(--color-text);
  border: var(--hairline);
  background-color: transparent;
  transition: border-color var(--dur-fast) var(--ease);
}
.lang-switcher__trigger:hover {
  border-color: var(--color-text);
}

.lang-switcher__caret {
  inline-size: 10px;
  block-size: 10px;
  border-inline-end: 1.5px solid currentColor;
  border-block-end: 1.5px solid currentColor;
  transform: rotate(45deg) translateY(-2px);
  transition: transform var(--dur-base) var(--ease);
}
.lang-switcher[data-open="true"] .lang-switcher__caret {
  transform: rotate(-135deg) translateY(-2px);
}

.lang-switcher__panel {
  display: none;
  position: absolute;
  inset-inline-end: 0;
  inset-block-start: calc(100% + var(--sp-2));
  min-inline-size: 200px;
  background-color: var(--color-bg);
  border: var(--hairline);
  padding: var(--sp-2);
  z-index: 60;
}
.lang-switcher[data-open="true"] .lang-switcher__panel {
  display: block;
}

.lang-switcher__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
}

.lang-switcher__item a {
  display: block;
  padding: var(--sp-2) var(--sp-3);
  font-size: var(--fs-small);
  color: var(--color-text);
  transition: background-color var(--dur-fast) var(--ease);
}
.lang-switcher__item a:hover,
.lang-switcher__item a[aria-current="true"] {
  background-color: var(--color-bg-alt);
}


/* ----------------------------------------------------------------------------
 * 6. Language suggestion banner — slides in from top
 * -------------------------------------------------------------------------- */

.lang-banner {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  z-index: 70;
  background-color: var(--color-text);
  color: var(--color-bg);
  transform: translateY(-100%);
  transition: transform var(--dur-slow) var(--ease);
}
.lang-banner[data-visible="true"] {
  transform: translateY(0);
}

.lang-banner__inner {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--sp-3);
  padding-block: var(--sp-3);
  padding-inline: var(--gutter);
  font-size: var(--fs-small);
}

.lang-banner__action {
  font-weight: var(--fw-medium);
  border-block-end: 1px solid currentColor;
  padding-block-end: 2px;
}

.lang-banner__dismiss {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  inline-size: 28px;
  block-size: 28px;
  color: var(--color-bg);
  opacity: 0.7;
  transition: opacity var(--dur-fast) var(--ease);
}
.lang-banner__dismiss:hover {
  opacity: 1;
}


/* ----------------------------------------------------------------------------
 * 7. Hero
 * -------------------------------------------------------------------------- */

.hero {
  min-block-size: 80vh;
  display: flex;
  align-items: center;
  padding-block: var(--section-py);
  position: relative;
}

.hero__inner {
  max-inline-size: 60rem;
}

.hero__eyebrow {
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-block-end: var(--sp-4);
}

.hero__title {
  font-size: var(--fs-display-1);
  font-weight: var(--fw-medium);
  line-height: var(--lh-tight);
  letter-spacing: -0.02em;
  margin-block-end: var(--sp-4);
}

.hero__lede {
  font-size: clamp(1.125rem, 1.6vw, 1.375rem);
  color: var(--color-text-muted);
  margin-block-end: var(--sp-6);
  max-inline-size: 48rem;
}

.hero__ctas {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
}


/* ----------------------------------------------------------------------------
 * 8. Stats row — 3-4 items, mono numerals in EMBER
 * -------------------------------------------------------------------------- */

.stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-block-start: var(--hairline);
  border-block-end: var(--hairline);
}

.stats__item {
  padding-block: var(--sp-5);
  padding-inline: var(--sp-3);
  border-block-end: var(--hairline);
}
.stats__item:last-child {
  border-block-end: 0;
}

.stats__number {
  font-family: var(--font-mono);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: var(--fw-medium);
  line-height: 1;
  color: var(--color-accent);
  letter-spacing: -0.02em;
}

.stats__label {
  display: block;
  margin-block-start: var(--sp-2);
  font-size: var(--fs-small);
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
}


/* ----------------------------------------------------------------------------
 * 9. Section lead — H2 + intro + optional CTA link
 * -------------------------------------------------------------------------- */

.section-lead {
  max-inline-size: 50rem;
  margin-block-end: var(--sp-7);
}

.section-lead__eyebrow {
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-block-end: var(--sp-3);
}

.section-lead__title {
  font-size: var(--fs-display-2);
  margin-block-end: var(--sp-4);
}

.section-lead__intro {
  color: var(--color-text-muted);
  font-size: 1.125rem;
  margin-block-end: var(--sp-4);
}

.section-lead__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-weight: var(--fw-medium);
  border-block-end: 1px solid var(--color-text);
  padding-block-end: 2px;
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.section-lead__cta:hover {
  color: var(--color-accent);
  border-block-end-color: var(--color-accent);
}


/* ----------------------------------------------------------------------------
 * 10. Cards — image top, hairline border, no shadow
 * -------------------------------------------------------------------------- */

.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-5);
}

.card {
  display: flex;
  flex-direction: column;
  background-color: var(--color-bg);
  border: var(--hairline);
  border-radius: var(--radius-soft);
  transition: border-color var(--dur-base) var(--ease);
  overflow: hidden;
}
.card:hover {
  border-color: var(--color-text);
}

.card__media {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background-color: var(--color-bg-alt);
}
.card__media img {
  inline-size: 100%;
  block-size: 100%;
  object-fit: cover;
  transition: transform var(--dur-slow) var(--ease);
}
.card:hover .card__media img {
  transform: scale(1.02);
}

.card__body {
  padding: var(--sp-4);
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  flex-grow: 1;
}

.card__title {
  font-size: var(--fs-h3);
  font-weight: var(--fw-medium);
}

.card__text {
  color: var(--color-text-muted);
  font-size: 1rem;
}

.card__caption {
  font-size: var(--fs-small);
  color: var(--color-text-muted);
}


/* ----------------------------------------------------------------------------
 * 11. Buttons — primary (ember solid), secondary (steel outline), ghost
 * -------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  font-family: var(--font-body);
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  letter-spacing: 0.02em;
  padding: var(--sp-3) var(--sp-5);
  border: 1px solid transparent;
  border-radius: var(--radius-soft);
  cursor: pointer;
  text-align: center;
  transition:
    background-color var(--dur-fast) var(--ease),
    border-color var(--dur-fast) var(--ease),
    color var(--dur-fast) var(--ease);
}

.btn--primary {
  background-color: var(--color-accent);
  color: var(--color-bg);
  border-color: var(--color-accent);
}
.btn--primary:hover {
  background-color: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
}

.btn--secondary {
  background-color: transparent;
  color: var(--color-text);
  border-color: var(--color-text);
}
.btn--secondary:hover {
  background-color: var(--color-text);
  color: var(--color-bg);
}

.btn--ghost {
  background-color: transparent;
  color: var(--color-text);
  padding-inline: 0;
  border: 0;
  border-block-end: 1px solid transparent;
  border-radius: 0;
  padding-block: var(--sp-2);
}
.btn--ghost:hover {
  border-block-end-color: var(--color-accent);
  color: var(--color-accent);
}


/* ----------------------------------------------------------------------------
 * 12. Forms — labels above, hairline-bottom inputs
 * -------------------------------------------------------------------------- */

.form {
  display: grid;
  gap: var(--sp-4);
  max-inline-size: 36rem;
}

.form__field {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}

.form__label {
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  letter-spacing: 0.02em;
  color: var(--color-text);
}

.form__input,
.form__textarea,
.form__select {
  display: block;
  inline-size: 100%;
  padding-block: var(--sp-2);
  padding-inline: 0;
  background-color: transparent;
  border: 0;
  border-block-end: var(--hairline);
  border-radius: 0;
  color: var(--color-text);
  font-size: var(--fs-body);
  transition: border-color var(--dur-fast) var(--ease);
}

.form__input:focus,
.form__textarea:focus,
.form__select:focus {
  outline: none;
  border-block-end-color: var(--color-accent);
  box-shadow: 0 1px 0 0 var(--color-accent);
}

.form__textarea {
  min-block-size: 8rem;
  resize: vertical;
}

.form__help {
  font-size: var(--fs-small);
  color: var(--color-text-muted);
}

.form__error {
  font-size: var(--fs-small);
  color: var(--color-accent-dark);
}

.form__honeypot {
  position: absolute;
  inset-inline-start: -9999px;
  inline-size: 1px;
  block-size: 1px;
  overflow: hidden;
}

.form__actions {
  display: flex;
  gap: var(--sp-3);
  margin-block-start: var(--sp-3);
}


/* ----------------------------------------------------------------------------
 * 13. Cookie consent banner — fixed bottom, three buttons
 * -------------------------------------------------------------------------- */

.cookie-consent {
  position: fixed;
  inset-inline: var(--gutter);
  inset-block-end: var(--gutter);
  z-index: 80;
  background-color: var(--color-text);
  color: var(--color-bg);
  padding: var(--sp-4);
  border-radius: var(--radius-soft);
  transform: translateY(calc(100% + var(--gutter)));
  transition: transform var(--dur-slow) var(--ease);
  max-inline-size: 32rem;
  margin-inline-start: auto;
}
.cookie-consent[data-visible="true"] {
  transform: translateY(0);
}

.cookie-consent__title {
  font-size: 1rem;
  font-weight: var(--fw-semibold);
  margin-block-end: var(--sp-2);
  color: var(--color-bg);
}

.cookie-consent__text {
  font-size: var(--fs-small);
  color: var(--color-bg);
  opacity: 0.85;
  margin-block-end: var(--sp-4);
}

.cookie-consent__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
}

.cookie-consent .btn--primary {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-bg);
}
.cookie-consent .btn--secondary {
  background-color: transparent;
  color: var(--color-bg);
  border-color: var(--color-bg);
}
.cookie-consent .btn--secondary:hover {
  background-color: var(--color-bg);
  color: var(--color-text);
}
.cookie-consent .btn--ghost {
  color: var(--color-bg);
  opacity: 0.8;
}
.cookie-consent .btn--ghost:hover {
  opacity: 1;
  border-block-end-color: var(--color-bg);
  color: var(--color-bg);
}


/* ----------------------------------------------------------------------------
 * 14. Footer
 * -------------------------------------------------------------------------- */

.site-footer {
  border-block-start: var(--hairline);
  background-color: var(--color-bg);
  padding-block-start: var(--sp-7);
  padding-block-end: var(--sp-5);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-5);
  padding-block-end: var(--sp-6);
}

.site-footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}

.site-footer__brand img {
  block-size: 28px;
  inline-size: auto;
}

.site-footer__tagline {
  font-size: var(--fs-small);
  color: var(--color-text-muted);
  max-inline-size: 24rem;
}

.site-footer__col-title {
  font-size: var(--fs-small);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text);
  margin-block-end: var(--sp-3);
}

.site-footer__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: var(--sp-2);
}

.site-footer__list a {
  font-size: var(--fs-small);
  color: var(--color-text-muted);
  transition: color var(--dur-fast) var(--ease);
}
.site-footer__list a:hover {
  color: var(--color-text);
}

.site-footer__fineprint {
  border-block-start: var(--hairline);
  padding-block-start: var(--sp-4);
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
  justify-content: space-between;
  align-items: center;
  font-size: var(--fs-small);
  color: var(--color-text-muted);
}

.site-footer__fineprint a:hover {
  color: var(--color-text);
}


/* ----------------------------------------------------------------------------
 * 15. Utilities
 * -------------------------------------------------------------------------- */

.visually-hidden {
  position: absolute !important;
  inline-size: 1px !important;
  block-size: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.text-muted   { color: var(--color-text-muted); }
.text-center  { text-align: center; }

.mt-3 { margin-block-start: var(--sp-3); }
.mt-5 { margin-block-start: var(--sp-5); }
.mt-7 { margin-block-start: var(--sp-7); }
.mb-3 { margin-block-end: var(--sp-3); }
.mb-5 { margin-block-end: var(--sp-5); }
.mb-7 { margin-block-end: var(--sp-7); }


/* ----------------------------------------------------------------------------
 * 16. Motion — reveal entrance animation
 * -------------------------------------------------------------------------- */

@keyframes reveal-fade-up {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.reveal {
  opacity: 0;
  transform: translateY(8px);
  animation: reveal-fade-up var(--dur-slow) var(--ease) forwards;
}
.reveal[data-delay="1"] { animation-delay: 80ms; }
.reveal[data-delay="2"] { animation-delay: 160ms; }
.reveal[data-delay="3"] { animation-delay: 240ms; }

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}


/* ----------------------------------------------------------------------------
 * 17. Responsive — mobile-first; 768 tablet; 1024 desktop
 * -------------------------------------------------------------------------- */

@media (min-width: 768px) {
  .site-nav {
    display: block;
  }
  .site-header__menu-toggle {
    display: none;
  }

  .stats {
    grid-template-columns: repeat(2, 1fr);
  }
  .stats__item {
    border-block-end: 0;
    border-inline-end: var(--hairline);
    padding-inline: var(--sp-5);
  }
  .stats__item:nth-child(2n) {
    border-inline-end: 0;
  }

  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .site-footer__grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--sp-6);
  }
}

@media (min-width: 1024px) {
  .stats {
    grid-template-columns: repeat(4, 1fr);
  }
  .stats__item {
    border-inline-end: var(--hairline);
  }
  .stats__item:nth-child(2n) {
    border-inline-end: var(--hairline);
  }
  .stats__item:last-child {
    border-inline-end: 0;
  }

  .card-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .hero__inner {
    max-inline-size: 56rem;
  }
}