/* === Reusable Components === */

/* --- Placeholder image system --- */
.placeholder {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
}

.placeholder::after {
  content: attr(data-label);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-weight: var(--weight-medium);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
}

/* Placeholder aspect ratios */
.placeholder--wide { aspect-ratio: 2 / 1; }
.placeholder--square { aspect-ratio: 1 / 1; }
.placeholder--tall { aspect-ratio: 3 / 4; }
.placeholder--brand { aspect-ratio: 4 / 3; }
.placeholder--mobile { aspect-ratio: 9 / 19.5; }

/* --- Project Card (Work grid) --- */
.project-card {
  display: block;
  color: inherit;
}

.project-card:hover {
  color: inherit;
}

.project-card__image {
  width: 100%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 16px;
  aspect-ratio: 16 / 10;
  will-change: transform;
}

.project-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.project-card__content {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.project-card__header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.project-card__date {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-weight: var(--weight-medium);
  flex-shrink: 0;
}

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

.project-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-normal);
}

.project-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 4px;
}

/* --- Tag / Pill --- */
.tag {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  color: var(--color-text-muted);
  background: var(--color-surface);
  padding: 4px 12px;
  border-radius: var(--radius-full);
}

/* --- Meta list (project info) --- */
.meta-list {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-8) var(--space-24);
  align-items: baseline;
}

.meta-list dt {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
}

.meta-list dd {
  font-size: var(--text-sm);
  color: var(--color-text-primary);
}

/* --- Metric --- */
.metric {
  text-align: center;
  padding: var(--space-24);
}

.metric__value {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: var(--weight-bold);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--color-text-primary);
}

.metric__label {
  display: block;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-8);
  line-height: var(--leading-normal);
}

/* --- Improvement item --- */
.improvement-item {
  padding: var(--space-24);
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
}

.improvement-item h4 {
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
  margin-bottom: var(--space-8);
}

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

/* --- Highlight list --- */
.highlight-list {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-12);
  margin-top: var(--space-16);
}

.highlight-list li {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-normal);
  padding-left: 20px;
  position: relative;
}

.highlight-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-text-muted);
}

/* --- Skills list --- */
.skills-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: var(--space-12);
}

/* --- Button --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-8);
  padding: var(--space-16) var(--space-32);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  border-radius: var(--radius-full);
  transition: all var(--duration-normal) ease;
}

.btn--primary {
  background-color: var(--color-text-primary);
  color: var(--color-white);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  color: var(--color-white);
}

/* --- Back button (detail view) --- */
.back-btn {
  display: none;
  align-items: center;
  gap: 6px;
  padding: 8px 16px 8px 10px;
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-muted);
  background: var(--color-surface);
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: color var(--duration-fast) ease, background-color var(--duration-fast) ease;
  margin-bottom: 32px;
}

.back-btn:hover {
  color: var(--color-text-primary);
  background-color: var(--color-gray-200);
}

.back-btn svg {
  flex-shrink: 0;
}

/* Detail view: show back button */
.main.is-detail-view .back-btn {
  display: inline-flex;
}

/* Hide project detail sections by default — positioned but invisible */
.section--project-detail {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 0;
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  z-index: -1;
}

/* In detail view: hide non-detail sections */
.main.is-detail-view .section:not(.section--project-detail) {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  position: absolute;
  height: 0;
  width: 0;
  overflow: hidden;
}

/* Active project detail section */
.main.is-detail-view .section--project-detail.is-active {
  position: relative;
  height: auto;
  overflow: visible;
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  z-index: 1;
  border-top: none;
  padding-top: 0;
  padding-bottom: var(--padding-desktop);
}

/* --- Lightbox --- */
.lightbox {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(255, 255, 255, 0.95);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  cursor: zoom-out;
}

.lightbox.is-active {
  opacity: 1;
  pointer-events: auto;
}

.lightbox img {
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
  border-radius: var(--radius-lg);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
  transform: scale(0.9);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.lightbox.is-active img {
  transform: scale(1);
}

/* --- Project Navigation (bottom of cases) --- */
.project-nav {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  gap: 8px;
  margin-top: var(--space-64);
}

.project-nav__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-muted);
  background: var(--color-surface);
  border-radius: var(--radius-full);
  transition: all var(--duration-fast) ease;
}

.project-nav__link:hover {
  color: var(--color-text-primary);
  background-color: var(--color-gray-200);
  transform: translateY(-1px);
}

.project-nav__link--prev {
  padding-left: 10px;
}

.project-nav__link--next {
  padding-right: 10px;
}

.project-nav__link svg {
  flex-shrink: 0;
}

/* --- Back to Top --- */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  color: var(--color-text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all 0.4s var(--ease-out-expo);
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
}

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

.back-to-top:hover {
  background-color: var(--color-accent);
  color: var(--color-white);
  border-color: var(--color-accent);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(255, 112, 34, 0.2);
}