/* ========== Navigation ========== */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-fixed);
  height: var(--navbar-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-lg);
  background: transparent;
  transition: background var(--duration-normal) var(--ease-smooth),
              backdrop-filter var(--duration-normal) var(--ease-smooth);
}

.navbar--scrolled {
  background: rgba(15, 15, 35, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--glass-border);
}

.navbar__brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.navbar__logo {
  font-size: var(--text-2xl);
}

.navbar__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.navbar__menu {
  display: none;
  align-items: center;
  gap: var(--space-xl);
  list-style: none;
}

@media (min-width: 1025px) {
  .navbar__menu {
    display: flex;
  }
}

.navbar__link {
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  transition: color var(--duration-fast) var(--ease-smooth);
  position: relative;
}

.navbar__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width var(--duration-fast) var(--ease-smooth);
}

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

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

.navbar__actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.navbar__lang-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  height: 40px;
  padding: 0 var(--space-md);
  border-radius: var(--radius-lg);
  background: var(--glass-background);
  border: 1px solid var(--glass-border);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-smooth);
  backdrop-filter: var(--glass-blur);
}

.navbar__lang-toggle:hover {
  background: var(--color-surface);
  color: var(--color-text-primary);
  border-color: var(--color-accent-blue);
}

.navbar__lang-toggle .lang-icon {
  font-size: var(--text-lg);
}

.navbar__lang-toggle .lang-text {
  min-width: 32px;
  text-align: center;
}

@media (max-width: 768px) {
  .navbar__lang-toggle .lang-text {
    display: none;
  }
  
  .navbar__lang-toggle {
    padding: 0 var(--space-sm);
    width: 40px;
    justify-content: center;
  }
}

.navbar__github {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  transition: background var(--duration-fast) var(--ease-smooth),
              color var(--duration-fast) var(--ease-smooth);
}

.navbar__github:hover {
  background: var(--color-surface);
  color: var(--color-text-primary);
}

.navbar__hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  border-radius: var(--radius-md);
  transition: background var(--duration-fast) var(--ease-smooth);
}

.navbar__hamburger:hover {
  background: var(--color-surface);
}

.navbar__hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text-primary);
  border-radius: 2px;
  transition: transform var(--duration-fast) var(--ease-smooth),
              opacity var(--duration-fast) var(--ease-smooth);
}

.navbar__hamburger--active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.navbar__hamburger--active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (min-width: 1025px) {
  .navbar__hamburger {
    display: none;
  }
}

/* ========== Mobile Menu ========== */

.mobile-menu {
  position: fixed;
  top: var(--navbar-height);
  left: 0;
  right: 0;
  bottom: 0;
  z-index: var(--z-modal-backdrop);
  background: rgba(15, 15, 35, 0.95);
  backdrop-filter: blur(20px);
  padding: var(--space-xl);
  transform: translateX(100%);
  transition: transform var(--duration-normal) var(--ease-smooth);
}

.mobile-menu--active {
  transform: translateX(0);
}

.mobile-menu__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  list-style: none;
}

.mobile-menu__link {
  display: block;
  font-size: var(--text-xl);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  padding: var(--space-md);
  border-radius: var(--radius-lg);
  transition: background var(--duration-fast) var(--ease-smooth),
              color var(--duration-fast) var(--ease-smooth);
}

.mobile-menu__link:hover,
.mobile-menu__link--active {
  background: var(--color-surface);
  color: var(--color-text-primary);
}

/* ========== Buttons ========== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-lg);
  transition: all var(--duration-fast) var(--ease-smooth);
  cursor: pointer;
  text-decoration: none;
}

.btn--primary {
  background: var(--gradient-primary);
  color: var(--color-text-primary);
  border: none;
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.btn--primary:active {
  transform: translateY(0);
}

.btn--secondary {
  background: var(--glass-background);
  color: var(--color-text-primary);
  border: 1px solid var(--glass-border);
  backdrop-filter: var(--glass-blur);
}

.btn--secondary:hover {
  background: var(--glass-background-hover);
  transform: translateY(-2px);
}

.btn--ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn--ghost:hover {
  background: var(--color-surface);
  color: var(--color-text-primary);
  border-color: var(--glass-border);
}

.btn--large {
  padding: var(--space-md) var(--space-xl);
  font-size: var(--text-lg);
}

.btn--disabled,
.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* ========== Project Card ========== */

.project-card {
  background: var(--glass-background);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-lg);
  backdrop-filter: var(--glass-blur);
  transition: transform var(--duration-normal) var(--ease-smooth),
              box-shadow var(--duration-normal) var(--ease-smooth);
  cursor: pointer;
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.project-card--featured {
  grid-row: span 2;
}

.project-card__header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.project-card__icon {
  font-size: var(--text-3xl);
  width: 1.5em;
  height: 1.5em;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.project-card__icon svg {
  width: 100%;
  height: 100%;
  fill: currentColor;
}

.project-card__title {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
}

.project-card__description {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
  line-height: var(--leading-relaxed);
}

.project-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-bottom: var(--space-md);
}

.project-card__stats {
  display: flex;
  gap: var(--space-lg);
  margin-bottom: var(--space-md);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.project-card__actions {
  display: flex;
  gap: var(--space-sm);
}

.project-card__status {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--text-xs);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-full);
  background: var(--color-surface);
}

.project-card__status--active {
  color: var(--color-success);
}

.project-card__status--archived {
  color: var(--color-warning);
}

.project-card__status--developing {
  color: var(--color-info);
}

/* ========== Tags ========== */

.tag {
  display: inline-flex;
  align-items: center;
  font-size: var(--text-xs);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-full);
  background: var(--color-surface);
  color: var(--color-text-secondary);
  transition: background var(--duration-fast) var(--ease-smooth);
}

.tag:hover {
  background: var(--color-surface-hover);
  color: var(--color-text-primary);
}

.filter-tag {
  display: inline-flex;
  align-items: center;
  font-size: var(--text-sm);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-full);
  background: transparent;
  border: 1px solid var(--glass-border);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-smooth);
}

.filter-tag:hover {
  background: var(--color-surface);
  color: var(--color-text-primary);
}

.filter-tag--active {
  background: var(--gradient-primary);
  border-color: transparent;
  color: var(--color-text-primary);
}

/* ========== Search Box ========== */

.search-box {
  position: relative;
  width: 100%;
  max-width: 300px;
}

.search-box__input {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  padding-right: var(--space-2xl);
  background: var(--glass-background);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  color: var(--color-text-primary);
  font-size: var(--text-base);
  backdrop-filter: var(--glass-blur);
  transition: border-color var(--duration-fast) var(--ease-smooth);
}

.search-box__input:focus {
  border-color: var(--color-accent-blue);
}

.search-box__clear {
  position: absolute;
  right: var(--space-sm);
  top: 50%;
  transform: translateY(-50%);
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  border-radius: var(--radius-full);
  transition: color var(--duration-fast) var(--ease-smooth);
  opacity: 0;
  visibility: hidden;
}

.search-box__clear:hover {
  color: var(--color-text-primary);
}

.search-box__clear--visible {
  opacity: 1;
  visibility: visible;
}

/* ========== Article Card ========== */

.article-card {
  background: var(--glass-background);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  backdrop-filter: var(--glass-blur);
  transition: transform var(--duration-normal) var(--ease-smooth),
              box-shadow var(--duration-normal) var(--ease-smooth);
}

.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.article-card__image {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
}

.article-card__content {
  padding: var(--space-lg);
}

.article-card__category {
  display: inline-block;
  font-size: var(--text-xs);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  background: var(--gradient-primary);
  color: var(--color-text-primary);
  margin-bottom: var(--space-sm);
}

.article-card__title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-sm);
}

.article-card__excerpt {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
  line-height: var(--leading-relaxed);
}

.article-card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.article-card__author {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.article-card__author-avatar {
  width: 24px;
  height: 24px;
  border-radius: var(--radius-full);
  object-fit: cover;
}

/* ========== Stat Card ========== */

.stat-card {
  background: var(--glass-background);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-lg);
  text-align: center;
  backdrop-filter: var(--glass-blur);
}

.stat-card--large {
  grid-column: span 2;
}

@media (max-width: 767px) {
  .stat-card--large {
    grid-column: span 1;
  }
}

.stat-card__icon {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-sm);
}

.stat-card__number {
  font-size: var(--text-3xl);
  font-weight: var(--font-bold);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-xs);
}

.stat-card__label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ========== Team Card ========== */

.team-card {
  background: var(--glass-background);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  text-align: center;
  backdrop-filter: var(--glass-blur);
  transition: transform var(--duration-normal) var(--ease-smooth);
}

.team-card:hover {
  transform: translateY(-2px);
}

.team-card__avatar {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-full);
  margin: 0 auto var(--space-sm);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-2xl);
}

.team-card__name {
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-xs);
}

.team-card__role {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ========== Chart Card ========== */

.chart-card {
  background: var(--glass-background);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-lg);
  backdrop-filter: var(--glass-blur);
}

.chart-card__title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-lg);
}

.chart-card__body {
  min-height: 200px;
}

/* ========== Modal ========== */

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: var(--z-modal-backdrop);
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(5px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--duration-normal) var(--ease-smooth),
              visibility var(--duration-normal) var(--ease-smooth);
}

.modal-overlay--active {
  opacity: 1;
  visibility: visible;
}

.modal {
  position: relative;
  width: 100%;
  max-width: 800px;
  max-height: 90vh;
  background: var(--color-background);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  transform: scale(0.95);
  transition: transform var(--duration-normal) var(--ease-smooth);
}

.modal-overlay--active .modal {
  transform: scale(1);
}

.modal__close {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-2xl);
  color: var(--color-text-muted);
  border-radius: var(--radius-full);
  background: var(--color-surface);
  transition: background var(--duration-fast) var(--ease-smooth),
              color var(--duration-fast) var(--ease-smooth);
  z-index: 1;
}

.modal__close:hover {
  background: var(--color-surface-hover);
  color: var(--color-text-primary);
}

.modal__content {
  padding: var(--space-xl);
  overflow-y: auto;
  max-height: 90vh;
}

/* ========== Empty State ========== */

.empty-state {
  text-align: center;
  padding: var(--space-3xl);
}

.empty-state__icon {
  font-size: 4rem;
  margin-bottom: var(--space-lg);
  opacity: 0.5;
}

.empty-state__title {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-sm);
}

.empty-state__text {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
}

/* ========== Project Detail ========== */

.project-detail__header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.project-detail__icon {
  font-size: var(--text-4xl);
  width: 1.5em;
  height: 1.5em;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.project-detail__icon svg {
  width: 100%;
  height: 100%;
  fill: currentColor;
}

.project-detail__title {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-text-primary);
}

.project-detail__stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.project-detail__description {
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-lg);
}

.project-detail__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-bottom: var(--space-lg);
}

.project-detail__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.project-detail__image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-top: var(--space-lg);
}

.project-detail__image img {
  width: 100%;
  height: auto;
}

/* ========== Back to Top Button ========== */

.back-to-top {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  color: var(--color-text-primary);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: opacity var(--duration-normal) var(--ease-smooth),
              visibility var(--duration-normal) var(--ease-smooth),
              transform var(--duration-normal) var(--ease-smooth);
  z-index: var(--z-sticky);
}

.back-to-top--visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

/* ========== Filter Bar ========== */

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

/* ========== Load More Button ========== */

.load-more {
  display: block;
  margin: var(--space-xl) auto 0;
}

/* ========== Screenshots Grid ========== */

.screenshots {
  margin-top: var(--space-lg);
}

.screenshots__title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-md);
}

.screenshots__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: var(--space-md);
}

.screenshot-item {
  position: relative;
  aspect-ratio: 16/10;
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  transition: transform var(--duration-fast) var(--ease-smooth),
              box-shadow var(--duration-fast) var(--ease-smooth);
}

.screenshot-item:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-md);
}

.screenshot-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-normal) var(--ease-smooth);
}

.screenshot-item:hover img {
  transform: scale(1.05);
}

.screenshot-item::after {
  content: '🔍';
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.4);
  opacity: 0;
  transition: opacity var(--duration-fast) var(--ease-smooth);
  font-size: var(--text-2xl);
}

.screenshot-item:hover::after {
  opacity: 1;
}

/* ========== Lightbox ========== */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  background: rgba(0, 0, 0, 0.95);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--duration-normal) var(--ease-smooth),
              visibility var(--duration-normal) var(--ease-smooth);
}

.lightbox--active {
  opacity: 1;
  visibility: visible;
}

.lightbox__close,
.lightbox__prev,
.lightbox__next {
  position: absolute;
  z-index: 1;
  background: rgba(255, 255, 255, 0.1);
  border: none;
  color: white;
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease-smooth);
  border-radius: var(--radius-md);
}

.lightbox__close {
  top: var(--space-md);
  right: var(--space-md);
  width: 48px;
  height: 48px;
  font-size: var(--text-2xl);
}

.lightbox__prev,
.lightbox__next {
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  font-size: var(--text-3xl);
}

.lightbox__prev {
  left: var(--space-md);
}

.lightbox__next {
  right: var(--space-md);
}

.lightbox__close:hover,
.lightbox__prev:hover,
.lightbox__next:hover {
  background: rgba(255, 255, 255, 0.2);
}

.lightbox__container {
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.lightbox__image {
  max-width: 100%;
  max-height: 80vh;
  object-fit: contain;
  border-radius: var(--radius-md);
}

.lightbox__caption {
  margin-top: var(--space-md);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}