/* ============================================
   LAYOUT.CSS - Grid System & Layout Components
   HOLISYS - National Fire Detection & Alarm System
   ============================================ */

/* ------------------------------------------
   CONTAINER SYSTEM
   ------------------------------------------ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

@media (min-width: 640px) {
  .container {
    padding-left: var(--space-6);
    padding-right: var(--space-6);
  }
}

@media (min-width: 1024px) {
  .container {
    padding-left: var(--space-8);
    padding-right: var(--space-8);
  }
}

@media (min-width: 1280px) {
  .container {
    padding-left: var(--space-12);
    padding-right: var(--space-12);
  }
}

/* Container Sizes */
.container--sm {
  max-width: var(--container-sm);
}

.container--md {
  max-width: var(--container-md);
}

.container--lg {
  max-width: var(--container-lg);
}

.container--xl {
  max-width: var(--container-xl);
}

.container--2xl {
  max-width: var(--container-2xl);
}

.container--fluid {
  max-width: none;
}

/* ------------------------------------------
   GRID SYSTEM
   ------------------------------------------ */
.grid {
  display: grid;
  gap: var(--grid-gap);
}

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

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

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

.grid--cols-4 {
  grid-template-columns: repeat(4, 1fr);
}

.grid--cols-5 {
  grid-template-columns: repeat(5, 1fr);
}

.grid--cols-6 {
  grid-template-columns: repeat(6, 1fr);
}

.grid--cols-12 {
  grid-template-columns: repeat(12, 1fr);
}

/* Responsive Grid */
@media (min-width: 640px) {
  .sm\:grid--cols-1 { grid-template-columns: repeat(1, 1fr); }
  .sm\:grid--cols-2 { grid-template-columns: repeat(2, 1fr); }
  .sm\:grid--cols-3 { grid-template-columns: repeat(3, 1fr); }
  .sm\:grid--cols-4 { grid-template-columns: repeat(4, 1fr); }
  .sm\:grid--cols-6 { grid-template-columns: repeat(6, 1fr); }
}

@media (min-width: 768px) {
  .md\:grid--cols-1 { grid-template-columns: repeat(1, 1fr); }
  .md\:grid--cols-2 { grid-template-columns: repeat(2, 1fr); }
  .md\:grid--cols-3 { grid-template-columns: repeat(3, 1fr); }
  .md\:grid--cols-4 { grid-template-columns: repeat(4, 1fr); }
  .md\:grid--cols-6 { grid-template-columns: repeat(6, 1fr); }
}

@media (min-width: 1024px) {
  .lg\:grid--cols-1 { grid-template-columns: repeat(1, 1fr); }
  .lg\:grid--cols-2 { grid-template-columns: repeat(2, 1fr); }
  .lg\:grid--cols-3 { grid-template-columns: repeat(3, 1fr); }
  .lg\:grid--cols-4 { grid-template-columns: repeat(4, 1fr); }
  .lg\:grid--cols-5 { grid-template-columns: repeat(5, 1fr); }
  .lg\:grid--cols-6 { grid-template-columns: repeat(6, 1fr); }
}

@media (min-width: 1280px) {
  .xl\:grid--cols-1 { grid-template-columns: repeat(1, 1fr); }
  .xl\:grid--cols-2 { grid-template-columns: repeat(2, 1fr); }
  .xl\:grid--cols-3 { grid-template-columns: repeat(3, 1fr); }
  .xl\:grid--cols-4 { grid-template-columns: repeat(4, 1fr); }
  .xl\:grid--cols-5 { grid-template-columns: repeat(5, 1fr); }
  .xl\:grid--cols-6 { grid-template-columns: repeat(6, 1fr); }
}

/* Grid Gap Variants */
.grid--gap-0 { gap: 0; }
.grid--gap-2 { gap: var(--space-2); }
.grid--gap-4 { gap: var(--space-4); }
.grid--gap-6 { gap: var(--space-6); }
.grid--gap-8 { gap: var(--space-8); }
.grid--gap-10 { gap: var(--space-10); }
.grid--gap-12 { gap: var(--space-12); }

/* ------------------------------------------
   FLEXBOX UTILITIES
   ------------------------------------------ */
.flex {
  display: flex;
}

.flex--inline {
  display: inline-flex;
}

.flex--row {
  flex-direction: row;
}

.flex--row-reverse {
  flex-direction: row-reverse;
}

.flex--col {
  flex-direction: column;
}

.flex--col-reverse {
  flex-direction: column-reverse;
}

.flex--wrap {
  flex-wrap: wrap;
}

.flex--nowrap {
  flex-wrap: nowrap;
}

.flex--wrap-reverse {
  flex-wrap: wrap-reverse;
}

/* Justify Content */
.justify--start {
  justify-content: flex-start;
}

.justify--end {
  justify-content: flex-end;
}

.justify--center {
  justify-content: center;
}

.justify--between {
  justify-content: space-between;
}

.justify--around {
  justify-content: space-around;
}

.justify--evenly {
  justify-content: space-evenly;
}

/* Align Items */
.items--start {
  align-items: flex-start;
}

.items--end {
  align-items: flex-end;
}

.items--center {
  align-items: center;
}

.items--baseline {
  align-items: baseline;
}

.items--stretch {
  align-items: stretch;
}

/* Align Content */
.content--start {
  align-content: flex-start;
}

.content--end {
  align-content: flex-end;
}

.content--center {
  align-content: center;
}

.content--between {
  align-content: space-between;
}

.content--around {
  align-content: space-around;
}

.content--evenly {
  align-content: space-evenly;
}

/* Flex Grow & Shrink */
.flex--grow {
  flex-grow: 1;
}

.flex--grow-0 {
  flex-grow: 0;
}

.flex--shrink {
  flex-shrink: 1;
}

.flex--shrink-0 {
  flex-shrink: 0;
}

/* ------------------------------------------
   SECTION SPACING
   ------------------------------------------ */
.section {
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
}

.section--sm {
  padding-top: var(--space-12);
  padding-bottom: var(--space-12);
}

.section--lg {
  padding-top: var(--space-24);
  padding-bottom: var(--space-24);
}

.section--xl {
  padding-top: var(--space-32);
  padding-bottom: var(--space-32);
}

/* Section Backgrounds */
.section--bg-primary {
  background-color: var(--color-bg-primary);
}

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

.section--bg-dark {
  background-color: var(--color-bg-dark);
  color: var(--color-text-inverse);
}

.section--bg-dark h1,
.section--bg-dark h2,
.section--bg-dark h3,
.section--bg-dark h4,
.section--bg-dark h5,
.section--bg-dark h6 {
  color: var(--color-text-inverse);
}

.section--bg-dark p {
  color: var(--color-text-inverse-muted);
}

/* ------------------------------------------
   HEADER & NAVIGATION
   ------------------------------------------ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-fixed);
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  transition: background-color var(--transition-fast), box-shadow var(--transition-fast);
}

.header--scrolled {
  background-color: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-md);
}

.header__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: var(--font-bold);
  font-size: var(--text-xl);
  color: var(--color-text-primary);
}

.header__logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
}

/* Navigation */
.nav {
  display: none;
}

@media (min-width: 1024px) {
  .nav {
    display: flex;
    align-items: center;
    gap: var(--space-8);
  }
}

.nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav__item {
  margin: 0;
}

.nav__link {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  padding: var(--space-2) 0;
  position: relative;
  transition: color var(--transition-fast);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--transition-fast);
}

.nav__link:hover,
.nav__link--active {
  color: var(--color-primary);
}

.nav__link:hover::after,
.nav__link--active::after {
  width: 100%;
}

/* Mobile Menu Toggle */
.nav__toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-lg);
  background-color: var(--color-bg-secondary);
  color: var(--color-text-primary);
  transition: background-color var(--transition-fast);
}

.nav__toggle:hover {
  background-color: var(--color-bg-tertiary);
}

@media (min-width: 1024px) {
  .nav__toggle {
    display: none;
  }
}

/* Mobile Navigation */
.nav--mobile {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-bg-primary);
  padding: var(--space-6);
  z-index: var(--z-fixed);
  overflow-y: auto;
}

.nav--mobile.active {
  display: block;
}

.nav--mobile .nav__list {
  flex-direction: column;
  align-items: stretch;
  gap: var(--space-2);
}

.nav--mobile .nav__link {
  display: block;
  padding: var(--space-4);
  font-size: var(--text-lg);
  border-radius: var(--radius-lg);
  transition: background-color var(--transition-fast);
}

.nav--mobile .nav__link:hover {
  background-color: var(--color-bg-secondary);
}

.nav--mobile .nav__link::after {
  display: none;
}

/* ------------------------------------------
   FOOTER
   ------------------------------------------ */
.footer {
  background-color: var(--color-bg-dark);
  color: var(--color-text-inverse);
  padding-top: var(--space-16);
  padding-bottom: var(--space-8);
}

.footer__grid {
  display: grid;
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}

@media (min-width: 768px) {
  .footer__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .footer__grid {
    grid-template-columns: 2fr repeat(3, 1fr);
  }
}

.footer__brand {
  max-width: 320px;
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: var(--font-bold);
  font-size: var(--text-xl);
  color: var(--color-text-inverse);
  margin-bottom: var(--space-4);
}

.footer__description {
  color: var(--color-text-inverse-muted);
  margin-bottom: var(--space-6);
}

.footer__heading {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  color: var(--color-text-inverse);
  margin-bottom: var(--space-4);
}

.footer__links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer__link-item {
  margin-bottom: var(--space-3);
}

.footer__link {
  color: var(--color-text-inverse-muted);
  font-size: var(--text-sm);
  transition: color var(--transition-fast);
}

.footer__link:hover {
  color: var(--color-text-inverse);
}

.footer__bottom {
  border-top: 1px solid var(--color-border-dark);
  padding-top: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  align-items: center;
  text-align: center;
}

@media (min-width: 768px) {
  .footer__bottom {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

.footer__copyright {
  font-size: var(--text-sm);
  color: var(--color-text-inverse-muted);
}

.footer__legal {
  display: flex;
  gap: var(--space-6);
}

.footer__legal-link {
  font-size: var(--text-sm);
  color: var(--color-text-inverse-muted);
  transition: color var(--transition-fast);
}

.footer__legal-link:hover {
  color: var(--color-text-inverse);
}

/* ------------------------------------------
   HERO SECTION
   ------------------------------------------ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 72px;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.hero__bg-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(10, 10, 10, 0.95) 0%,
    rgba(10, 10, 10, 0.85) 50%,
    rgba(10, 10, 10, 0.7) 100%
  );
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  padding: var(--space-8) 0;
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-primary-light);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  margin-bottom: var(--space-4);
}

.hero__eyebrow::before {
  content: '';
  width: 24px;
  height: 2px;
  background-color: var(--color-primary);
}

.hero__title {
  font-size: var(--text-4xl);
  font-weight: var(--font-extrabold);
  color: var(--color-text-inverse);
  line-height: var(--leading-tight);
  margin-bottom: var(--space-6);
}

@media (min-width: 768px) {
  .hero__title {
    font-size: var(--text-5xl);
  }
}

@media (min-width: 1024px) {
  .hero__title {
    font-size: var(--text-6xl);
  }
}

.hero__subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-inverse-muted);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-8);
  max-width: 600px;
}

@media (min-width: 768px) {
  .hero__subtitle {
    font-size: var(--text-xl);
  }
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

/* ------------------------------------------
   PAGE HEADER
   ------------------------------------------ */
.page-header {
  padding-top: calc(72px + var(--space-16));
  padding-bottom: var(--space-12);
  background-color: var(--color-bg-dark);
  color: var(--color-text-inverse);
}

.page-header__eyebrow {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-primary-light);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  margin-bottom: var(--space-4);
}

.page-header__title {
  font-size: var(--text-4xl);
  font-weight: var(--font-extrabold);
  color: var(--color-text-inverse);
  margin-bottom: var(--space-4);
}

@media (min-width: 768px) {
  .page-header__title {
    font-size: var(--text-5xl);
  }
}

.page-header__description {
  font-size: var(--text-lg);
  color: var(--color-text-inverse-muted);
  max-width: 700px;
}

/* ------------------------------------------
   ASPECT RATIOS
   ------------------------------------------ */
.aspect--video {
  aspect-ratio: 16 / 9;
}

.aspect--square {
  aspect-ratio: 1 / 1;
}

.aspect--portrait {
  aspect-ratio: 3 / 4;
}

.aspect--landscape {
  aspect-ratio: 4 / 3;
}

/* ------------------------------------------
   VISUALLY HIDDEN
   ------------------------------------------ */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}