/* Quantum Video Strategy - Layout Styles */

/* Reset and Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-secondary);
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: var(--text-primary);
  background-color: var(--warm-cream);
  min-height: 100vh;
}

/* Skip to Content */
.skip-link {
  position: absolute;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--quantum-navy);
  color: white;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  z-index: var(--z-tooltip);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-4);
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.container--narrow {
  max-width: 800px;
}

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

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-fixed);
  background: var(--quantum-navy);
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

.header--scrolled {
  box-shadow: var(--shadow-lg);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  padding: 0 var(--space-6);
  max-width: var(--container-2xl);
  margin: 0 auto;
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: white;
}

.header__logo svg {
  height: 40px;
  width: auto;
}

.header__logo-text {
  font-family: var(--font-primary);
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: white;
}

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

@media (min-width: 1024px) {
  .nav {
    display: flex;
    align-items: center;
    gap: var(--space-1);
  }
}

.nav__link {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-4);
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.nav__link:hover,
.nav__link--active {
  color: white;
  background: rgba(255, 255, 255, 0.1);
}

.nav__link--active {
  font-weight: var(--font-semibold);
}

/* Dropdown */
.nav__dropdown {
  position: relative;
}

.nav__dropdown > button.nav__link {
  font-family: inherit;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  background: transparent;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav__dropdown > button.nav__link:hover {
  background: rgba(255, 255, 255, 0.1);
}

.nav__dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: var(--space-2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--transition-base);
}

.nav__dropdown:hover .nav__dropdown-menu,
.nav__dropdown:focus-within .nav__dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav__dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  color: var(--text-primary);
  text-decoration: none;
  font-size: var(--text-sm);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.nav__dropdown-item:hover {
  background: var(--light-gray);
}

.nav__dropdown-item--coming-soon {
  color: var(--text-secondary);
}

.nav__dropdown-badge {
  font-size: var(--text-xs);
  padding: 2px 6px;
  background: var(--soft-peach);
  color: var(--quantum-navy);
  border-radius: var(--radius-full);
  font-weight: var(--font-medium);
}

.nav__dropdown-divider {
  height: 1px;
  background: #eee;
  margin: var(--space-2) 0;
}

.nav__dropdown-label {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: #666;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.nav__dropdown-item--color {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  width: 100%;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
}

.nav__dropdown-item--color:hover {
  background: var(--light-gray);
}

.nav__dropdown-item--color.active {
  background: #e8f4ff;
}

.nav__color-swatches {
  display: flex;
  gap: 2px;
}

.nav__color-swatches span {
  width: 16px;
  height: 16px;
  border-radius: 3px;
  border: 1px solid rgba(0,0,0,0.1);
}

/* Header CTA */
.header__cta {
  display: none;
}

@media (min-width: 1024px) {
  .header__cta {
    display: block;
    margin-left: var(--space-4);
  }
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: transparent;
  border: none;
  cursor: pointer;
  color: white;
}

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

/* Mobile Navigation */
.mobile-nav {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  max-width: 320px;
  background: white;
  z-index: var(--z-modal);
  transform: translateX(100%);
  transition: transform var(--transition-slow);
  overflow-y: auto;
}

.mobile-nav--open {
  transform: translateX(0);
}

.mobile-nav__overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: var(--z-modal-backdrop);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base);
}

.mobile-nav__overlay--visible {
  opacity: 1;
  visibility: visible;
}

.mobile-nav__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--light-gray);
}

.mobile-nav__close {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--text-primary);
}

.mobile-nav__links {
  padding: var(--space-4);
}

.mobile-nav__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4);
  color: var(--text-primary);
  text-decoration: none;
  font-weight: var(--font-medium);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.mobile-nav__link:hover {
  background: var(--light-gray);
}

.mobile-nav__submenu {
  padding-left: var(--space-6);
}

.mobile-nav__submenu-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--text-sm);
}

/* Main Content */
.main {
  padding-top: 72px; /* Header height */
  min-height: 100vh;
}

/* Sections */
.section {
  padding: var(--space-16) 0;
}

.section--hero {
  padding: var(--space-24) 0;
  background: var(--gradient-hero);
  color: white;
}

.section--light {
  background: white;
}

.section--cream {
  background: var(--warm-cream);
}

.section--navy {
  background: var(--gradient-hero);
  color: white;
}

.section__header {
  text-align: center;
  margin-bottom: var(--space-12);
}

.section__overline {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: var(--font-bold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  color: var(--quantum-coral);
  margin-bottom: var(--space-3);
}

.section--navy .section__overline {
  color: var(--soft-peach);
}

.section__title {
  font-family: var(--font-primary);
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
  margin-bottom: var(--space-4);
}

.section__description {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto;
}

.section--navy .section__description {
  color: rgba(255, 255, 255, 0.8);
}

/* Footer */
.footer {
  background: var(--dark-navy);
  color: white;
  padding: var(--space-16) 0 var(--space-8);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}

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

.footer__brand {
  max-width: 300px;
}

.footer__logo {
  margin-bottom: var(--space-4);
}

.footer__tagline {
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
}

.footer__section-title {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  margin-bottom: var(--space-4);
  color: var(--soft-peach);
}

.footer__links {
  list-style: none;
}

.footer__link {
  display: block;
  padding: var(--space-2) 0;
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  font-size: var(--text-sm);
  transition: color var(--transition-fast);
}

.footer__link:hover {
  color: white;
}

.footer__bottom {
  padding-top: var(--space-8);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  align-items: center;
}

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

.footer__copyright {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.5);
}

.footer__credits {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.7);
}

.footer__credits a {
  color: var(--quantum-coral);
  text-decoration: none;
}

/* Grid System */
.grid {
  display: grid;
  gap: var(--space-6);
}

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

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

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

@media (min-width: 640px) {
  .grid--2, .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 768px) {
  .grid--3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid--4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Flexbox Utilities */
.flex {
  display: flex;
}

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

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

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

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

.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

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

@media (max-width: 767px) {
  .hide-mobile { display: none !important; }
}

@media (min-width: 768px) {
  .hide-desktop { display: none !important; }
}