/**
 * Shared UI Components
 * ====================
 * Reusable component styles across all pages.
 */

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

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  padding: var(--space-4) 0;
  background: rgba(10, 10, 10, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition:
    border-color var(--transition-normal),
    padding var(--transition-normal),
    background-color var(--transition-normal);
}

.nav.scrolled {
  padding: var(--space-3) 0;
  border-color: var(--color-border-default);
  background: rgba(10, 10, 10, 0.95);
}

.nav__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav__logo {
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  letter-spacing: var(--tracking-tight);
  color: var(--color-text-primary);
  transition: color var(--transition-fast);
}

.nav__logo span {
  color: var(--color-accent);
}

.nav__logo:hover {
  color: var(--color-accent);
}

/* Desktop Navigation Links */
.nav__links {
  display: none;
  align-items: center;
  gap: var(--space-8);
  list-style: none;
  margin: 0;
  padding: 0;
}

@media (min-width: 768px) {
  .nav__links {
    display: flex;
  }
}

.nav__links li {
  display: flex;
  align-items: center;
}

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

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

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

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

/* Mobile Toggle */
.nav__mobile-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  padding: var(--space-2);
  min-width: 44px;
  min-height: 44px;
  cursor: pointer;
}

@media (min-width: 768px) {
  .nav__mobile-toggle {
    display: none;
  }
}

.nav__mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text-primary);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav__mobile-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav__mobile-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav__mobile-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Menu */
.nav__mobile-menu {
  position: fixed;
  top: 60px;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-bg-primary);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-20px);
  transition:
    opacity var(--transition-normal),
    visibility var(--transition-normal),
    transform var(--transition-normal);
}

.nav__mobile-menu.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav__mobile-link {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--color-border-default);
  transition: color var(--transition-fast);
}

.nav__mobile-link:hover,
.nav__mobile-link.active {
  color: var(--color-accent);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  line-height: 1;
  text-align: center;
  white-space: nowrap;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition:
    background-color var(--transition-fast),
    color var(--transition-fast),
    border-color var(--transition-fast),
    transform var(--transition-fast),
    box-shadow var(--transition-fast);
  min-height: 44px;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Primary Button */
.btn--primary {
  background: var(--color-accent);
  color: var(--color-text-primary);
  border: 1px solid var(--color-accent);
}

.btn--primary:hover:not(:disabled) {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.btn--primary:active:not(:disabled) {
  transform: translateY(0);
}

/* Secondary Button */
.btn--secondary {
  background: transparent;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border-strong);
}

.btn--secondary:hover:not(:disabled) {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* Ghost Button */
.btn--ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border: 1px solid transparent;
  padding: var(--space-2) var(--space-4);
}

.btn--ghost:hover:not(:disabled) {
  color: var(--color-text-primary);
  background: var(--color-bg-hover);
}

/* Button Sizes */
.btn--sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
  min-height: 36px;
}

.btn--lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
  min-height: 52px;
}

/* Button with Icon */
.btn__icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.btn__icon--right {
  margin-left: var(--space-1);
}

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

.card {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  transition:
    border-color var(--transition-normal),
    transform var(--transition-normal),
    box-shadow var(--transition-normal);
}

.card:hover {
  border-color: var(--color-border-strong);
}

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

.card--flat {
  background: transparent;
  border: none;
  padding: 0;
}

/* Stat Card */
.stat-card {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  text-align: center;
  transition:
    border-color var(--transition-normal),
    transform var(--transition-normal),
    box-shadow var(--transition-normal);
}

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

.stat-card__number {
  font-family: var(--font-mono);
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  color: var(--color-accent-light);
  line-height: 1;
  margin-bottom: var(--space-2);
}

.stat-card__label {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  margin-bottom: var(--space-1);
}

.stat-card__context {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
}

/* ===========================================
   TECH TAGS
   =========================================== */

.tech-tag {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-full);
  transition:
    background-color var(--transition-fast),
    border-color var(--transition-fast),
    color var(--transition-fast);
}

.tech-tag:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  background: var(--color-info-bg);
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* ===========================================
   CLIENT LOGOS
   =========================================== */

.client-logos {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: var(--space-8);
}

.client-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  opacity: 0.6;
  filter: grayscale(100%);
  transition:
    opacity var(--transition-normal),
    filter var(--transition-normal);
}

.client-logo:hover {
  opacity: 1;
  filter: grayscale(0%);
}

.client-logo img {
  max-height: 40px;
  max-width: 120px;
  object-fit: contain;
}

/* ===========================================
   PAGE HEADER
   =========================================== */

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

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

.page-header__subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ===========================================
   SECTION HEADER
   =========================================== */

.section-header {
  margin-bottom: var(--space-10);
}

.section-header--center {
  text-align: center;
}

.section-header__label {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: var(--tracking-widest);
  margin-bottom: var(--space-3);
}

.section-header__title {
  font-size: var(--text-3xl);
  font-weight: var(--font-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
}

.section-header__subtitle {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  max-width: 600px;
}

.section-header--center .section-header__subtitle {
  margin: 0 auto;
}

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

.footer {
  padding: var(--space-10) 0 var(--space-6);
  border-top: 1px solid var(--color-border-default);
  background: var(--color-bg-secondary);
}

/* Mobile-first: compact footer */
@media (max-width: 767px) {
  .footer {
    padding: var(--space-8) 0 var(--space-6);
  }
}

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

@media (min-width: 768px) {
  .footer__inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--space-10);
    margin-bottom: var(--space-8);
  }
}

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  max-width: 280px;
}

.footer__logo {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--color-text-primary);
  letter-spacing: var(--tracking-tight);
  transition: color var(--transition-fast);
}

.footer__logo span {
  color: var(--color-accent);
}

.footer__logo:hover {
  color: var(--color-accent);
}

.footer__tagline {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

.footer__links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4) var(--space-6);
}

@media (max-width: 479px) {
  .footer__links {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4) var(--space-4);
  }
  
  /* Third column spans full width on very small screens */
  .footer__column:last-child {
    grid-column: 1 / -1;
  }
}

@media (min-width: 768px) {
  .footer__links {
    gap: var(--space-6) var(--space-10);
  }
}

.footer__column {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.footer__heading {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: var(--tracking-widest);
  margin-bottom: var(--space-2);
}

.footer__list {
  display: flex;
  flex-direction: column;
  gap: 0;
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer__list li {
  margin: 0;
}

.footer__list a {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast), transform var(--transition-fast);
  display: block;
  padding: var(--space-2) 0;
  line-height: var(--leading-normal);
  min-height: 44px;
  display: flex;
  align-items: center;
}

/* Reduce visible spacing while maintaining touch targets */
@media (min-width: 768px) {
  .footer__list a {
    padding: var(--space-1) 0;
    min-height: auto;
  }
}

.footer__list a:hover {
  color: var(--color-accent);
}

.footer__list a:active {
  transform: translateX(2px);
}

.footer__social {
  display: flex;
  gap: var(--space-4);
  margin-top: var(--space-4);
}

.footer__social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: var(--color-text-secondary);
  background: var(--color-bg-surface);
  border-radius: var(--radius-md);
  transition:
    color var(--transition-fast),
    background-color var(--transition-fast),
    transform var(--transition-fast);
}

.footer__social a:hover {
  color: var(--color-accent);
  background: var(--color-bg-hover);
  transform: translateY(-2px);
}

.footer__social svg {
  width: 20px;
  height: 20px;
}

/* Footer CTA Section */
.footer__cta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-5) var(--space-4);
  margin-bottom: var(--space-6);
  text-align: center;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.footer__cta:hover {
  border-color: var(--color-accent);
  box-shadow: 0 0 20px rgba(59, 130, 246, 0.1);
}

@media (min-width: 768px) {
  .footer__cta {
    flex-direction: row;
    justify-content: center;
    gap: var(--space-6);
    padding: var(--space-6) var(--space-8);
    text-align: center;
  }
}

.footer__cta-text {
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin: 0;
}

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

.footer__cta-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
}

.footer__cta-buttons .btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.footer__cta-buttons .btn svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.footer__bottom {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border-subtle);
  text-align: center;
}

@media (min-width: 768px) {
  .footer__bottom {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    text-align: left;
    padding-top: var(--space-6);
  }
}

.footer__copyright {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
}

.footer__meta {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
}

.footer__bottom a {
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.footer__bottom a:hover {
  color: var(--color-accent);
}

/* ===========================================
   LOADING STATES
   =========================================== */

.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-bg-surface) 25%,
    var(--color-bg-hover) 50%,
    var(--color-bg-surface) 75%
  );
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s ease-in-out infinite;
  border-radius: var(--radius-md);
}

@keyframes skeleton-loading {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

.skeleton-text {
  height: 1em;
  margin-bottom: var(--space-2);
}

.skeleton-text:last-child {
  width: 70%;
}

.skeleton-card {
  height: 200px;
}

/* ===========================================
   DIVIDER
   =========================================== */

.divider {
  height: 1px;
  background: var(--color-border-default);
  border: none;
  margin: var(--space-8) 0;
}

.divider--accent {
  background: linear-gradient(
    90deg,
    transparent,
    var(--color-accent),
    transparent
  );
}

/* ===========================================
   BADGE
   =========================================== */

.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  border-radius: var(--radius-sm);
}

.badge--primary {
  background: var(--color-info-bg);
  color: var(--color-accent);
}

.badge--success {
  background: var(--color-success-bg);
  color: var(--color-success);
}

.badge--warning {
  background: var(--color-warning-bg);
  color: var(--color-warning);
}

/* ===========================================
   TOOLTIP
   =========================================== */

[data-tooltip] {
  position: relative;
}

[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(-8px);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  color: var(--color-text-primary);
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-md);
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition:
    opacity var(--transition-fast),
    visibility var(--transition-fast);
  z-index: var(--z-tooltip);
}

[data-tooltip]:hover::after {
  opacity: 1;
  visibility: visible;
}

/* ===========================================
   MOBILE STICKY CTA
   =========================================== */

.mobile-sticky-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  padding: var(--space-3) var(--space-4);
  background: rgba(10, 10, 10, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid var(--color-border-default);
  transform: translateY(100%);
  opacity: 0;
  visibility: hidden;
  transition:
    transform var(--transition-normal),
    opacity var(--transition-normal),
    visibility var(--transition-normal);
}

.mobile-sticky-cta.visible {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

/* Hide on tablet and larger screens */
@media (min-width: 768px) {
  .mobile-sticky-cta {
    display: none !important;
  }
}

.mobile-sticky-cta__btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  width: 100%;
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  line-height: 1;
  text-align: center;
  white-space: nowrap;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition:
    background-color var(--transition-fast),
    transform var(--transition-fast),
    box-shadow var(--transition-fast);
  min-height: 48px;
}

.mobile-sticky-cta__btn--full {
  background: var(--color-accent);
  color: var(--color-text-primary);
  border: 1px solid var(--color-accent);
}

.mobile-sticky-cta__btn--full:hover,
.mobile-sticky-cta__btn--full:focus {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  box-shadow: var(--shadow-glow);
}

.mobile-sticky-cta__btn--full:active {
  transform: scale(0.98);
}

.mobile-sticky-cta__btn svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* Add safe area padding for notched devices */
@supports (padding-bottom: env(safe-area-inset-bottom)) {
  .mobile-sticky-cta {
    padding-bottom: calc(var(--space-3) + env(safe-area-inset-bottom));
  }
}