/* ============================================================================
   UniCircle — components.css
   ========================================================================= */

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 10px var(--space-5);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  font-weight: 600;
  font-size: var(--text-sm);
  cursor: pointer;
  transition: transform 120ms ease, background 120ms ease, box-shadow 120ms ease;
}

.btn:active { transform: scale(0.97); }

.btn-primary { background: var(--cobalt); color: #fff; }
.btn-primary:hover { background: #2340DE; text-decoration: none; }

.btn-secondary { background: var(--paper); color: var(--ink); border-color: var(--line); }
.btn-secondary:hover { background: var(--paper-dim); text-decoration: none; }

.btn-ghost { background: transparent; color: var(--slate); }
.btn-ghost:hover { color: var(--ink); background: var(--paper-dim); text-decoration: none; }

.btn-danger { background: var(--brick); color: #fff; }
.btn-danger:hover { background: #C93A2E; }

.btn-block { width: 100%; }
.btn[disabled] { opacity: 0.55; cursor: not-allowed; transform: none; }

.btn-loading { position: relative; color: transparent !important; }
.btn-loading::after {
  content: "";
  position: absolute;
  width: 16px; height: 16px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.5);
  border-top-color: #fff;
  animation: spin 700ms linear infinite;
}
.btn-secondary.btn-loading::after,
.btn-ghost.btn-loading::after {
  border-color: rgba(43,78,255,0.25);
  border-top-color: var(--cobalt);
}

/* ---------- Forms ---------- */

.field { margin-bottom: var(--space-4); }

.field label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.field input,
.field textarea,
.field select {
  width: 100%;
  padding: 10px var(--space-3);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--paper);
  color: var(--ink);
  transition: border-color 120ms ease, box-shadow 120ms ease;
}

.field input:focus,
.field textarea:focus,
.field select:focus {
  outline: none;
  border-color: var(--cobalt);
  box-shadow: 0 0 0 3px var(--cobalt-dim);
}

.field-error input, .field-error textarea { border-color: var(--brick); }
.field-error-message {
  color: var(--brick);
  font-size: var(--text-xs);
  margin-top: var(--space-1);
  display: flex;
  align-items: center;
  gap: 4px;
}

.field-hint { font-size: var(--text-xs); color: var(--slate); margin-top: var(--space-1); }

/* ---------- Cards ---------- */

.card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
}

/* ---------- Signature element: the academic "path stub" ----------
   A torn-ticket / stamped-ID breadcrumb: Institution > Faculty > Program
   > Year > Course. This is the real navigational spine of the product,
   not decoration. */

.path-stub {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0;
  background: var(--ink);
  border-radius: var(--radius-md);
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--paper);
}

.path-stub a, .path-stub span.current {
  padding: var(--space-3) var(--space-4);
  color: rgba(250, 249, 246, 0.65);
  white-space: nowrap;
}

.path-stub a:hover { color: var(--chartreuse); text-decoration: none; }

.path-stub span.current { color: var(--chartreuse); font-weight: 600; }

.path-stub .sep {
  color: rgba(250, 249, 246, 0.25);
  padding-inline: 2px;
}

/* perforated notch, boarding-pass style */
.path-stub::before {
  content: "";
  width: 10px;
}

/* ---------- Empty states ---------- */

.empty-state {
  text-align: center;
  padding: var(--space-8) var(--space-5);
  border: 1px dashed var(--line);
  border-radius: var(--radius-lg);
}

.empty-state h3 { margin-bottom: var(--space-2); }
.empty-state p { max-width: 380px; margin-inline: auto; margin-bottom: var(--space-5); }

/* ---------- Toasts ---------- */

.toast-region {
  position: fixed;
  bottom: var(--space-5);
  right: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  z-index: 100;
}

.toast {
  background: var(--ink);
  color: var(--paper);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  box-shadow: var(--shadow-card);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.toast.error { background: var(--brick); }
.toast.success::before { content: "✓"; color: var(--chartreuse); font-weight: 700; }

/* ---------- Skeleton loaders ---------- */

.skeleton {
  background: linear-gradient(90deg, var(--paper-dim) 25%, var(--line) 37%, var(--paper-dim) 63%);
  background-size: 400% 100%;
  border-radius: var(--radius-sm);
  animation: shimmer 1.4s ease infinite;
}

/* ---------- Badges / chips ---------- */

.chip {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: var(--text-xs);
  font-weight: 600;
  background: var(--cobalt-dim);
  color: var(--cobalt);
}

.chip-muted { background: var(--paper-dim); color: var(--slate); }