/*
 * 04-components.css — Reusable UI components
 * ─────────────────────────────────────────────
 * Buttons, tags/chips, post cards.
 * Add new components here (or a new numbered file for a big one).
 */

/* ══ Buttons ════════════════════════════════════════════════════════════════ */

.btn {
  display:         inline-flex;
  align-items:     center;
  gap:             var(--sp-2);
  padding:         0.55em 1.2em;
  border-radius:   var(--radius-sm);
  font-family:     var(--font-body);
  font-size:       var(--text-sm);
  font-weight:     500;
  letter-spacing:  0.02em;
  text-decoration: none;
  transition:      background var(--transition), color var(--transition),
                   border-color var(--transition), box-shadow var(--transition);
  white-space:     nowrap;
}

/* Solid accent */
.btn-primary {
  background: var(--color-accent);
  color:      #fff;
  border:     1.5px solid var(--color-accent);
}
.btn-primary:hover {
  background: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  color: #fff;
}

/* Outlined */
.btn-secondary {
  background:   transparent;
  color:        var(--color-accent);
  border:       1.5px solid var(--color-accent);
}
.btn-secondary:hover {
  background: var(--color-accent-light);
}

/* Ghost / text-only */
.btn-ghost {
  background:  transparent;
  color:       var(--color-text-faint-banner);
  border:      1.5px solid transparent;
  padding-inline: var(--sp-2);
}
.btn-ghost:hover { color: var(--color-accent); }

/* Publication link buttons */
.btn-pub {
  background:   var(--color-bg-subtle);
  color:        var(--color-text);
  border:       1.5px solid var(--color-border);
  padding:      0.35em 0.9em;
  font-size:    var(--text-xs);
  letter-spacing: 0.04em;
  text-transform: capitalize;
}
.btn-pub:hover {
  background:   var(--color-accent-light);
  border-color: var(--color-accent);
  color:        var(--color-accent);
}

/* Full-width variant */
.btn-full { width: 100%; justify-content: center; }


/* ══ Tags / chips ═══════════════════════════════════════════════════════════ */

.tag {
  display:        inline-block;
  padding:        0.2em 0.65em;
  border-radius:  100px;
  font-size:      var(--text-xs);
  font-weight:    500;
  letter-spacing: 0.04em;
  background:     var(--color-bg-subtle);
  color:          var(--color-text-muted);
  text-transform: lowercase;
  border:         1px solid var(--color-border);
  white-space:    nowrap;
}

/* Slightly smaller variant for post meta rows */
.tag-sm {
  font-size: var(--text-xs);
  padding:   0.15em 0.55em;
}


/* ══ Post cards ══════════════════════════════════════════════════════════════ */

.post-list {
  display:        flex;
  flex-direction: column;
  gap:            var(--sp-1);
}

.post-card {
  border-radius: var(--radius-md);
  overflow:      hidden;
}

.post-card-link {
  display:          block;
  padding:          var(--sp-5) var(--sp-6);
  text-decoration:  none;
  border-radius:    var(--radius-md);
  border:           1px solid transparent;
  transition:       background var(--transition), border-color var(--transition);
  position:         relative;
}
.post-card-link::before {
  content:          '';
  position:         absolute;
  left:             0;
  top:              var(--sp-5);
  bottom:           var(--sp-5);
  width:            3px;
  border-radius:    0 2px 2px 0;
  background:       var(--color-accent);
  opacity:          0;
  transition:       opacity var(--transition);
}
.post-card-link:hover {
  background:    var(--color-bg-card);
  border-color:  var(--color-border);
}
.post-card-link:hover::before { opacity: 1; }
.post-card-link:hover .post-card-title { color: var(--color-accent); }

.post-card-meta {
  display:     flex;
  align-items: center;
  gap:         var(--sp-3);
  flex-wrap:   wrap;
  margin-bottom: var(--sp-2);
}

.post-tags {
  display: flex;
  gap:     var(--sp-1);
  flex-wrap: wrap;
}