/* ============================================
   COMPONENTS — Buttons, Tags, Cards
   ============================================ */

/* ── Buttons ── */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--s-8);
  padding: var(--s-12) var(--s-24);
  font-family: var(--f-mono);
  font-size: var(--ts-xs);
  font-weight: var(--fw-medium);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border: 1px solid var(--c-text);
  background: transparent;
  color: var(--c-text);
  cursor: pointer;
  transition:
    background var(--t-base),
    color var(--t-base),
    border-color var(--t-base),
    transform var(--t-fast);
  white-space: nowrap;
}

.btn:hover {
  background: var(--c-terracotta-hover);
  border-color: var(--c-terracotta-hover);
  color: var(--c-surface);
}

.btn:active {
  transform: scale(0.98);
}

.btn--accent {
  border-color: var(--c-text);
  color: var(--c-text);
}

.btn--accent:hover {
  background: var(--c-terracotta-hover);
  border-color: var(--c-terracotta-hover);
  color: var(--c-surface);
}

.btn--filled {
  background: var(--c-text);
  color: var(--c-bg);
}

.btn--filled:hover {
  background: var(--c-terracotta-hover);
  border-color: var(--c-terracotta-hover);
  color: var(--c-surface);
}

.btn__arrow {
  transition: transform var(--t-base);
  font-size: 1.1em;
}

.btn:hover .btn__arrow {
  transform: translateX(3px);
}

/* ── Tags ── */

.tag {
  display: inline-flex;
  align-items: center;
  padding: var(--s-4) var(--s-12);
  font-family: var(--f-mono);
  font-size: var(--ts-2xs);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  background: var(--c-tag-bg);
  color: var(--c-accent);
  border-radius: var(--radius-sm);
}

.tag--outline {
  background: transparent;
  border: 1px solid var(--c-border);
  color: var(--c-text-secondary);
}

/* ── Status Badge ── */

.status {
  display: inline-flex;
  align-items: center;
  gap: var(--s-8);
  font-family: var(--f-mono);
  font-size: var(--ts-2xs);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.status__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-status-dev);
  flex-shrink: 0;
}

.status--live .status__dot {
  background: var(--c-status-live);
}

/* ── Project Card ── */

.project-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--c-border);
  background: var(--c-bg);
  transition:
    border-color var(--t-base),
    box-shadow var(--t-medium);
  position: relative;
  overflow: hidden;
}

.project-card:hover {
  border-color: var(--c-accent);
  box-shadow: 0 8px 40px rgba(28, 28, 28, 0.06);
}

.project-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--s-16) var(--s-24);
  border-bottom: 1px solid var(--c-border-light);
}

.project-card__number {
  font-family: var(--f-mono);
  font-size: var(--ts-xs);
  color: var(--c-text-tertiary);
  letter-spacing: 0.05em;
}

.project-card__image {
  position: relative;
  overflow: hidden;
  background: var(--c-bg-alt);
}

.project-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--t-slow);
}

.project-card:hover .project-card__image img {
  transform: scale(1.03);
}

.placeholder-image {
  width: 100%;
  aspect-ratio: 16 / 10;
  background:
    linear-gradient(var(--c-border-light) 1px, transparent 1px),
    linear-gradient(90deg, var(--c-border-light) 1px, transparent 1px),
    var(--c-bg-alt);
  background-size: 40px 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.placeholder-image span {
  font-family: var(--f-mono);
  font-size: var(--ts-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--c-text-tertiary);
  background: var(--c-bg-alt);
  padding: var(--s-4) var(--s-12);
}

.project-card__body {
  padding: var(--s-24);
  display: flex;
  flex-direction: column;
  gap: var(--s-16);
  flex-grow: 1;
}

.project-card__category {
  font-family: var(--f-mono);
  font-size: var(--ts-2xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--c-text-tertiary);
}

.project-card__title {
  font-size: var(--ts-xl);
  font-weight: var(--fw-semibold);
  line-height: var(--lh-heading);
}

.project-card__desc {
  font-size: var(--ts-sm);
  line-height: var(--lh-relaxed);
  color: var(--c-text-secondary);
}

.project-card__meta {
  margin-top: auto;
  padding-top: var(--s-16);
  border-top: 1px solid var(--c-border-light);
  display: flex;
  flex-direction: column;
  gap: var(--s-8);
}

.project-card__meta-row {
  display: flex;
  gap: var(--s-12);
  font-size: var(--ts-2xs);
  line-height: var(--lh-normal);
}

.project-card__meta-label {
  font-family: var(--f-mono);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--c-text-tertiary);
  flex-shrink: 0;
  min-width: 60px;
}

.project-card__meta-value {
  color: var(--c-text-secondary);
}

.project-card__link {
  display: inline-flex;
  align-items: center;
  gap: var(--s-8);
  font-family: var(--f-mono);
  font-size: var(--ts-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--c-accent);
  transition: gap var(--t-base);
  padding-top: var(--s-12);
}

.project-card__link:hover {
  gap: var(--s-12);
}

/* ── Approach List Item ── */

.approach-item {
  display: flex;
  align-items: flex-start;
  gap: var(--s-16);
  font-size: var(--ts-md);
  line-height: var(--lh-relaxed);
  color: var(--c-text-secondary);
}

.approach-item__marker {
  color: var(--c-accent);
  font-family: var(--f-mono);
  font-size: var(--ts-sm);
  flex-shrink: 0;
  margin-top: 3px;
}


/* ── Theme Toggle ── */

.theme-toggle {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border: 1px solid var(--c-border);
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
  transition:
    border-color var(--t-fast),
    background var(--t-fast);
  flex-shrink: 0;
}

.theme-toggle:hover {
  border-color: var(--c-text-tertiary);
  background: var(--c-bg-alt);
}

.theme-toggle__icon {
  width: 18px;
  height: 18px;
  stroke: var(--c-text-secondary);
  fill: none;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition:
    stroke var(--t-fast),
    opacity 300ms ease,
    transform 300ms ease;
  grid-area: 1 / 1;
}

.theme-toggle:hover .theme-toggle__icon {
  stroke: var(--c-text);
}

.theme-toggle__sun {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

.theme-toggle__moon {
  opacity: 0;
  transform: rotate(-90deg) scale(0.6);
}

[data-theme="dark"] .theme-toggle__sun {
  opacity: 0;
  transform: rotate(90deg) scale(0.6);
}

[data-theme="dark"] .theme-toggle__moon {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}