/**
 * Component Styles
 * Buttons, cards, navigation, forms, and UI components
 */

/* ==========================================================================
   BUTTONS
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.875rem 1.75rem;
  font-family: var(--font-sans);
  font-size: var(--font-size-body-sm);
  font-weight: var(--font-weight-medium);
  line-height: 1;
  text-decoration: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  min-height: 48px; /* Touch target */
}

.btn:focus-visible {
  outline: var(--focus-ring-width) solid var(--focus-ring-color);
  outline-offset: var(--focus-ring-offset);
}

/* Primary Button (Teal) */
.btn--primary {
  background-color: var(--color-accent);
  color: var(--color-white);
  border: none;
}

.btn--primary:hover {
  background-color: var(--color-accent);
  transform: translateY(-1px);
  box-shadow: var(--shadow-button-hover);
  text-decoration: none;
}

.btn--primary:active {
  transform: translateY(0);
  box-shadow: none;
}

/* Secondary Button (Outlined) */
.btn--secondary {
  background-color: transparent;
  color: var(--color-accent);
  border: 2px solid var(--color-accent);
  padding: calc(0.875rem - 2px) calc(1.75rem - 2px);
}

.btn--secondary:hover {
  background-color: var(--color-accent-light);
  text-decoration: none;
}

/* Ghost Button (Text Link Style) */
.btn--ghost {
  background-color: transparent;
  color: var(--color-accent);
  border: none;
  padding: 0.75rem 1rem;
}

.btn--ghost:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* Dark variant buttons (for dark sections) */
.btn--primary-dark {
  background-color: var(--color-white);
  color: var(--color-neutral-800);
}

.btn--primary-dark:hover {
  background-color: var(--color-neutral-100);
  box-shadow: 0 4px 12px rgba(255, 255, 255, 0.2);
}

.btn--secondary-dark {
  background-color: transparent;
  color: var(--color-white);
  border: 2px solid var(--color-white);
}

.btn--secondary-dark:hover {
  background-color: rgba(255, 255, 255, 0.1);
  text-decoration: none;
}

/* Full width button (mobile) */
@media (max-width: 639px) {
  .btn--full-mobile {
    width: 100%;
  }
}

/* Button with icon */
.btn__icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

/* ==========================================================================
   NAVIGATION
   ========================================================================== */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-fixed);
  height: var(--nav-height-mobile);
  transition: background-color var(--transition-base), box-shadow var(--transition-base);
}

@media (min-width: 1024px) {
  .nav {
    height: var(--nav-height-desktop);
  }
}

.nav--scrolled {
  background-color: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: var(--shadow-sm);
}

.nav__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav__logo {
  font-size: 1.125rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-neutral-800);
  text-decoration: none;
}

.nav__logo:hover {
  text-decoration: none;
}

/* Desktop Navigation */
.nav__menu {
  display: none;
  align-items: center;
  gap: var(--space-8);
}

@media (min-width: 1024px) {
  .nav__menu {
    display: flex;
  }
}

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

.nav__link {
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-neutral-600);
  text-decoration: none;
  padding: var(--space-2) 0;
  position: relative;
  transition: color var(--transition-fast);
}

.nav__link:hover {
  color: var(--color-neutral-800);
  text-decoration: none;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--color-accent);
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.nav__link:hover::after,
.nav__link--active::after {
  transform: scaleX(1);
}

.nav__link--active {
  color: var(--color-neutral-800);
}

/* Mobile Menu Toggle */
.nav__toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  color: var(--color-neutral-800);
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
}

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

.nav__toggle-icon {
  width: 24px;
  height: 24px;
}

/* Mobile Menu Overlay */
.nav__mobile {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-white);
  z-index: var(--z-modal);
  display: flex;
  flex-direction: column;
  padding: var(--space-6);
  transform: translateX(100%);
  transition: transform var(--transition-base);
}

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

.nav__mobile-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-8);
}

.nav__mobile-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  color: var(--color-neutral-800);
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
}

.nav__mobile-links {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
  padding: 0;
  margin: 0;
  flex: 1;
  justify-content: center;
}

.nav__mobile-link {
  font-size: 1.5rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-neutral-800);
  text-decoration: none;
  padding: var(--space-4);
  min-height: 64px;
  display: flex;
  align-items: center;
}

.nav__mobile-link:hover {
  color: var(--color-accent);
  text-decoration: none;
}

.nav__mobile-cta {
  margin-top: auto;
}

/* ==========================================================================
   CARDS
   ========================================================================== */

.card {
  background-color: var(--color-white);
  border: 1px solid var(--color-neutral-300);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: all var(--transition-base);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--color-accent);
}

/* Card without hover effect */
.card--static {
  cursor: default;
}

.card--static:hover {
  transform: none;
  box-shadow: none;
  border-color: var(--color-neutral-300);
}

/* Featured card (larger, different styling) */
.card--featured {
  background-color: var(--color-neutral-100);
  border: none;
  border-radius: var(--radius-xl);
  padding: var(--space-8);
}

.card--featured:hover {
  transform: none;
  box-shadow: none;
}

@media (max-width: 639px) {
  .card--featured {
    padding: var(--space-6);
  }
}

/* Card with top accent border */
.card--accent {
  border-top: 3px solid var(--color-accent);
}

/* Card content elements */
.card__number {
  font-size: var(--font-size-overline);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--letter-spacing-wider);
  color: var(--color-accent-dark);
  margin-bottom: var(--space-3);
}

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

.card__description {
  color: var(--color-neutral-600);
  margin-bottom: var(--space-4);
}

.card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: auto;
}

.card__tag {
  font-size: var(--font-size-caption);
  color: var(--color-neutral-500);
}

.card__tag::after {
  content: ' |';
  margin-left: var(--space-2);
  color: var(--color-neutral-300);
}

.card__tag:last-child::after {
  content: none;
}

/* Card link */
.card__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-caption);
  font-weight: var(--font-weight-medium);
  color: var(--color-accent-dark);
  margin-top: var(--space-4);
}

.card__link-icon {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-fast);
}

.card__link:hover .card__link-icon {
  transform: translateX(4px);
}

/* ==========================================================================
   CASE STUDY CARD (Featured Work)
   ========================================================================== */

.case-study {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

@media (min-width: 1024px) {
  .case-study {
    flex-direction: row;
    gap: var(--space-8);
  }
}

.case-study__content {
  flex: 1;
}

.case-study__metrics {
  display: flex;
  flex-direction: row;
  gap: var(--space-4);
}

@media (min-width: 1024px) {
  .case-study__metrics {
    flex-direction: column;
    gap: var(--space-5);
    flex-shrink: 0;
    width: 200px;
  }
}

.case-study__metric {
  flex: 1;
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  text-align: center;
}

@media (min-width: 1024px) {
  .case-study__metric {
    padding: var(--space-5);
  }
}

.case-study__tag {
  margin-bottom: var(--space-3);
}

.case-study__title {
  margin-bottom: var(--space-3);
}

.case-study__company {
  font-size: var(--font-size-body-sm);
  color: var(--color-neutral-500);
  margin-bottom: var(--space-4);
}

.case-study__description {
  color: var(--color-neutral-600);
  margin-bottom: var(--space-5);
}

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

.case-study__outcome {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
  color: var(--color-neutral-800);
}

.case-study__outcome-icon {
  width: 20px;
  height: 20px;
  color: var(--color-accent);
  flex-shrink: 0;
  margin-top: 2px;
}

/* ==========================================================================
   TESTIMONIALS
   ========================================================================== */

.testimonial {
  text-align: center;
  max-width: 40rem;
  margin-left: auto;
  margin-right: auto;
}

.testimonial__quote {
  font-size: var(--font-size-body-lg);
  font-style: italic;
  color: var(--color-neutral-700);
  line-height: var(--line-height-body-lg);
  margin-bottom: var(--space-6);
}

.testimonial__quote::before {
  content: '\201C';
}

.testimonial__quote::after {
  content: '\201D';
}

.testimonial__author {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
}

.testimonial__avatar {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  object-fit: cover;
}

.testimonial__info {
  text-align: left;
}

.testimonial__name {
  font-weight: var(--font-weight-medium);
  color: var(--color-neutral-800);
}

.testimonial__role {
  font-size: var(--font-size-body-sm);
  color: var(--color-neutral-500);
}

/* Company logos fallback */
.company-logos {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: var(--space-8);
}

.company-logos__logo {
  height: 32px;
  filter: grayscale(100%);
  opacity: 0.6;
  transition: all var(--transition-fast);
}

.company-logos__logo:hover {
  filter: grayscale(0%);
  opacity: 1;
}

/* ==========================================================================
   ICONS
   ========================================================================== */

.icon {
  display: inline-block;
  width: 24px;
  height: 24px;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  fill: none;
}

.icon--sm {
  width: 16px;
  height: 16px;
}

.icon--lg {
  width: 32px;
  height: 32px;
}

/* ==========================================================================
   SOCIAL LINKS
   ========================================================================== */

.social-links {
  display: flex;
  gap: var(--space-4);
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  color: var(--color-neutral-500);
  transition: color var(--transition-fast);
}

.social-link:hover {
  color: var(--color-white);
  text-decoration: none;
}

.social-link__icon {
  width: 24px;
  height: 24px;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */

.footer {
  background-color: var(--color-neutral-900);
  color: var(--color-neutral-400);
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
}

.footer__content {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

@media (min-width: 640px) {
  .footer__content {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.footer__brand {
  text-align: center;
}

@media (min-width: 640px) {
  .footer__brand {
    text-align: left;
  }
}

.footer__name {
  font-weight: var(--font-weight-medium);
  color: var(--color-white);
  margin-bottom: var(--space-1);
}

.footer__title {
  font-size: var(--font-size-body-sm);
  color: var(--color-neutral-400);
}

.footer__social {
  justify-content: center;
}

@media (min-width: 640px) {
  .footer__social {
    justify-content: flex-end;
  }
}

.footer__divider {
  border: none;
  border-top: 1px solid var(--color-neutral-700);
  margin: var(--space-6) 0;
}

.footer__copyright {
  font-size: var(--font-size-caption);
  color: var(--color-neutral-400);
  text-align: center;
}

/* ==========================================================================
   CONTACT SECTION
   ========================================================================== */

.contact {
  background-color: var(--color-neutral-800);
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
}

@media (max-width: 639px) {
  .contact {
    padding-top: var(--space-12);
    padding-bottom: var(--space-12);
  }
}

.contact__content {
  max-width: 40rem;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.contact__overline {
  color: var(--color-accent-light);
  margin-bottom: var(--space-4);
}

.contact__title {
  color: var(--color-white);
  margin-bottom: var(--space-5);
}

.contact__description {
  color: var(--color-neutral-300);
  font-size: var(--font-size-body-lg);
  margin-bottom: var(--space-8);
}

.contact__ctas {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

@media (min-width: 640px) {
  .contact__ctas {
    flex-direction: row;
    justify-content: center;
  }
}

.contact__secondary {
  color: var(--color-neutral-400);
  font-size: var(--font-size-caption);
}

.contact__secondary a {
  color: var(--color-neutral-400);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.contact__secondary a:hover {
  color: var(--color-white);
}

/* ==========================================================================
   SCROLL ANIMATIONS
   ========================================================================== */

[data-animate] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--duration-slow) var(--ease-out),
              transform var(--duration-slow) var(--ease-out);
}

[data-animate].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered children */
[data-animate-stagger] > * {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--duration-slow) var(--ease-out),
              transform var(--duration-slow) var(--ease-out);
}

[data-animate-stagger].is-visible > *:nth-child(1) { transition-delay: 0ms; }
[data-animate-stagger].is-visible > *:nth-child(2) { transition-delay: 80ms; }
[data-animate-stagger].is-visible > *:nth-child(3) { transition-delay: 160ms; }
[data-animate-stagger].is-visible > *:nth-child(4) { transition-delay: 240ms; }

[data-animate-stagger].is-visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  [data-animate],
  [data-animate-stagger] > * {
    opacity: 1;
    transform: none;
    transition: none;
  }
}