/* Primary -- Deep Purple bg, surface text. Use for the ONE primary action on each screen. */
.um-btn-primary {
  background-color: var(--um-color-primary);
  color: var(--um-color-bg-surface);
  font-family: var(--um-font-body);
  font-size: var(--um-text-small);
  font-weight: var(--um-weight-semibold);
  letter-spacing: var(--um-tracking-wider);
  padding: var(--um-space-3) var(--um-space-6);
  border: none;
  border-radius: var(--um-radius-sm);
  cursor: pointer;
  transition: background-color var(--um-transition-fast);
  height: 44px;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.um-btn-primary:hover {
  background-color: var(--um-color-primary-light);
}
.um-btn-primary:active {
  background-color: var(--um-color-primary-dark);
  transform: scale(0.98);
}

/* Secondary -- Surface bg, purple border and text. Use for secondary actions. */
.um-btn-secondary {
  background-color: var(--um-color-bg-surface);
  color: var(--um-color-primary);
  border: 1.5px solid var(--um-color-primary);
  font-family: var(--um-font-body);
  font-size: var(--um-text-small);
  font-weight: var(--um-weight-semibold);
  letter-spacing: var(--um-tracking-wider);
  padding: var(--um-space-3) var(--um-space-6);
  border-radius: var(--um-radius-sm);
  cursor: pointer;
  transition: all var(--um-transition-fast);
  height: 44px;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.um-btn-secondary:hover {
  background-color: var(--um-color-bg-lavender);
}

/* Accent -- Warm Orange bg, surface text. Use SPARINGLY for high-emphasis CTAs. */
.um-btn-accent {
  background-color: var(--um-color-accent);
  color: var(--um-color-bg-surface);
  font-family: var(--um-font-body);
  font-size: var(--um-text-small);
  font-weight: var(--um-weight-semibold);
  letter-spacing: var(--um-tracking-wider);
  padding: var(--um-space-3) var(--um-space-6);
  border: none;
  border-radius: var(--um-radius-sm);
  cursor: pointer;
  transition: background-color var(--um-transition-fast);
  height: 44px;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.um-btn-accent:hover {
  background-color: var(--um-color-accent-light);
}
.um-btn-accent:active {
  background-color: var(--um-color-accent-dark);
}

/* Ghost -- No bg, text-only. Use for tertiary actions, cancel, or navigation. */
.um-btn-ghost {
  background-color: transparent;
  color: var(--um-color-primary);
  border: none;
  font-family: var(--um-font-body);
  font-size: var(--um-text-small);
  font-weight: var(--um-weight-semibold);
  padding: var(--um-space-3) var(--um-space-4);
  cursor: pointer;
  border-radius: var(--um-radius-sm);
  transition: background-color var(--um-transition-fast);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.um-btn-ghost:hover {
  background-color: var(--um-color-bg-lavender);
}

/* Destructive -- Red, for delete/remove actions. Always requires confirmation. */
.um-btn-destructive {
  background-color: var(--um-color-error);
  color: var(--um-color-bg-surface);
  font-family: var(--um-font-body);
  font-size: var(--um-text-small);
  font-weight: var(--um-weight-semibold);
  padding: var(--um-space-3) var(--um-space-6);
  border: none;
  border-radius: var(--um-radius-sm);
  cursor: pointer;
  height: 44px;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.um-input {
  height: 44px;
  width: 100%;
  padding: var(--um-space-3) var(--um-space-4);
  font-family: var(--um-font-body);
  font-size: var(--um-text-body);
  color: var(--um-color-text);
  background-color: var(--um-color-bg-surface);
  border: 1px solid var(--um-color-border);
  border-radius: var(--um-radius-sm);
  transition: border-color var(--um-transition-fast), box-shadow var(--um-transition-fast);
}
.um-input::placeholder {
  color: var(--um-color-text-tertiary);
}
.um-input:focus {
  outline: none;
  border-color: var(--um-color-primary);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--um-color-primary) 15%, transparent);
}
.um-input--error {
  border-color: var(--um-color-error);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--um-color-error) 15%, transparent);
}

.um-label {
  display: block;
  font-family: var(--um-font-body);
  font-size: var(--um-text-small);
  font-weight: var(--um-weight-medium);
  color: var(--um-color-text);
  margin-bottom: var(--um-space-1);
}

.um-helper {
  font-size: var(--um-text-caption);
  color: var(--um-color-text);
  margin-top: var(--um-space-1);
}
.um-helper--error {
  color: var(--um-color-error);
}

.um-card {
  background-color: var(--um-color-bg-surface);
  border: 1px solid var(--um-color-border);
  border-radius: var(--um-radius-md);
  box-shadow: var(--um-shadow-card);
  padding: var(--um-space-6);
}
.um-card--mentee {
  background-color: var(--um-color-bg-lavender);
  border-color: transparent;
}
.um-card--mentor {
  background-color: var(--um-color-bg-peach);
  border-color: transparent;
}
.um-card--interactive {
  transition: box-shadow var(--um-transition-fast), transform var(--um-transition-fast);
  cursor: pointer;
}
.um-card--interactive:hover {
  box-shadow: var(--um-shadow-dropdown);
  transform: translateY(-1px);
}

/* Sizes: 24, 32, 40, 48, 96 */
.um-avatar {
  border-radius: var(--um-radius-full);
  object-fit: cover;
}
.um-avatar--xs {
  width: 24px;
  height: 24px;
}
.um-avatar--sm {
  width: 32px;
  height: 32px;
}
.um-avatar--md {
  width: 40px;
  height: 40px;
}
.um-avatar--lg {
  width: 48px;
  height: 48px;
}
.um-avatar--xl {
  width: 96px;
  height: 96px;
}

/* Fallback (initials) */
.um-avatar--fallback {
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--um-color-bg-lavender);
  color: var(--um-color-primary);
  font-weight: var(--um-weight-semibold);
}

.um-avatar--generated {
  --um-avatar-surface-a: var(--um-color-bg-lavender);
  --um-avatar-surface-b: var(--um-color-bg-page);
  --um-avatar-blob-a: var(--um-color-primary-light);
  --um-avatar-blob-b: var(--um-color-accent-light);
  --um-avatar-skin: color-mix(in srgb, var(--um-color-bg-peach) 72%, var(--um-color-accent-light));
  --um-avatar-hair: var(--um-color-primary-dark);
  --um-avatar-shirt: color-mix(in srgb, var(--um-color-primary) 72%, var(--um-color-bg-surface));
  --um-avatar-feature: var(--um-color-midnight);
  position: relative;
  overflow: hidden;
  border: 1px solid var(--um-color-border-light);
  display: block;
}

.um-avatar-art {
  position: relative;
  width: 100%;
  height: 100%;
  display: block;
}

.um-avatar-art > span {
  position: absolute;
  display: block;
}

.um-avatar-art__backdrop {
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(circle at 20% 20%, color-mix(in srgb, var(--um-avatar-blob-a) 52%, transparent) 0 32%, transparent 54%),
    radial-gradient(circle at 78% 76%, color-mix(in srgb, var(--um-avatar-blob-b) 48%, transparent) 0 36%, transparent 56%),
    linear-gradient(145deg, var(--um-avatar-surface-a) 0%, var(--um-avatar-surface-b) 100%);
}

.um-avatar-art__shoulders {
  left: 10%;
  right: 10%;
  bottom: -8%;
  height: 44%;
  border-radius: 44% 44% 30% 30%;
  z-index: 1;
  background: var(--um-avatar-shirt);
}

.um-avatar-art__neck {
  left: 45%;
  bottom: 30%;
  width: 10%;
  height: 14%;
  border-radius: var(--um-radius-md);
  z-index: 2;
  background: var(--um-avatar-skin);
}

.um-avatar-art__face {
  left: 31%;
  top: 22%;
  width: 38%;
  height: 42%;
  border-radius: var(--um-radius-full);
  z-index: 3;
  background: var(--um-avatar-skin);
}

.um-avatar-art__hair {
  left: 28%;
  top: 16%;
  width: 44%;
  height: 24%;
  border-radius: 58% 58% 44% 44%;
  z-index: 4;
  background: var(--um-avatar-hair);
}

.um-avatar-art__eye {
  top: 42%;
  width: 6%;
  height: 6%;
  border-radius: var(--um-radius-full);
  z-index: 5;
  background: var(--um-avatar-feature);
}

.um-avatar-art__eye--left {
  left: 42%;
}

.um-avatar-art__eye--right {
  left: 52%;
}

.um-avatar-art__mouth {
  left: 45%;
  top: 52%;
  width: 12%;
  height: 8%;
  border-bottom: 2px solid var(--um-avatar-feature);
  border-radius: 0 0 var(--um-radius-full) var(--um-radius-full);
  z-index: 5;
}

.um-avatar__badge {
  position: absolute;
  right: 2px;
  bottom: 2px;
  min-width: 24px;
  height: 24px;
  padding: 0 var(--um-space-1);
  border-radius: var(--um-radius-full);
  border: 1px solid var(--um-color-border);
  background-color: color-mix(in srgb, var(--um-color-bg-surface) 88%, var(--um-color-bg-page));
  color: var(--um-color-primary-dark);
  font-family: var(--um-font-body);
  font-size: var(--um-text-caption);
  font-weight: var(--um-weight-bold);
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  z-index: 6;
}

.um-avatar-seed-0 {
  --um-avatar-surface-a: var(--um-color-bg-lavender);
  --um-avatar-surface-b: var(--um-color-bg-page);
  --um-avatar-blob-a: var(--um-color-primary-light);
  --um-avatar-blob-b: var(--um-color-accent-light);
  --um-avatar-skin: color-mix(in srgb, var(--um-color-bg-peach) 74%, var(--um-color-accent-light));
  --um-avatar-hair: var(--um-color-primary-dark);
  --um-avatar-shirt: color-mix(in srgb, var(--um-color-primary) 72%, var(--um-color-bg-surface));
  --um-avatar-feature: var(--um-color-midnight);
}

.um-avatar-seed-1 {
  --um-avatar-surface-a: var(--um-color-bg-page);
  --um-avatar-surface-b: var(--um-color-bg-peach);
  --um-avatar-blob-a: var(--um-color-accent-dark);
  --um-avatar-blob-b: var(--um-color-primary-light);
  --um-avatar-skin: color-mix(in srgb, var(--um-color-bg-peach) 66%, var(--um-color-accent));
  --um-avatar-hair: color-mix(in srgb, var(--um-color-midnight) 82%, var(--um-color-accent-dark));
  --um-avatar-shirt: color-mix(in srgb, var(--um-color-accent-dark) 76%, var(--um-color-bg-surface));
  --um-avatar-feature: var(--um-color-midnight);
}

.um-avatar-seed-2 {
  --um-avatar-surface-a: var(--um-color-bg-lavender);
  --um-avatar-surface-b: color-mix(in srgb, var(--um-color-bg-surface) 80%, var(--um-color-bg-lavender));
  --um-avatar-blob-a: var(--um-color-info);
  --um-avatar-blob-b: var(--um-color-success);
  --um-avatar-skin: color-mix(in srgb, var(--um-color-bg-peach) 62%, var(--um-color-accent-dark));
  --um-avatar-hair: color-mix(in srgb, var(--um-color-midnight) 90%, var(--um-color-primary));
  --um-avatar-shirt: color-mix(in srgb, var(--um-color-success) 72%, var(--um-color-bg-surface));
  --um-avatar-feature: var(--um-color-midnight);
}

.um-avatar-seed-3 {
  --um-avatar-surface-a: color-mix(in srgb, var(--um-color-bg-page) 80%, var(--um-color-bg-peach));
  --um-avatar-surface-b: var(--um-color-bg-surface);
  --um-avatar-blob-a: var(--um-color-warning);
  --um-avatar-blob-b: var(--um-color-primary-light);
  --um-avatar-skin: color-mix(in srgb, var(--um-color-bg-peach) 82%, var(--um-color-bg-surface));
  --um-avatar-hair: color-mix(in srgb, var(--um-color-primary-dark) 92%, var(--um-color-midnight));
  --um-avatar-shirt: color-mix(in srgb, var(--um-color-primary-light) 74%, var(--um-color-bg-surface));
  --um-avatar-feature: var(--um-color-midnight);
}

.um-avatar-seed-4 {
  --um-avatar-surface-a: var(--um-color-bg-surface);
  --um-avatar-surface-b: var(--um-color-bg-lavender);
  --um-avatar-blob-a: var(--um-color-success);
  --um-avatar-blob-b: var(--um-color-accent);
  --um-avatar-skin: color-mix(in srgb, var(--um-color-bg-peach) 58%, var(--um-color-accent-dark));
  --um-avatar-hair: color-mix(in srgb, var(--um-color-midnight) 78%, var(--um-color-accent-dark));
  --um-avatar-shirt: color-mix(in srgb, var(--um-color-accent) 76%, var(--um-color-bg-surface));
  --um-avatar-feature: var(--um-color-midnight);
}

.um-avatar-seed-5 {
  --um-avatar-surface-a: color-mix(in srgb, var(--um-color-bg-lavender) 55%, var(--um-color-bg-surface));
  --um-avatar-surface-b: var(--um-color-bg-page);
  --um-avatar-blob-a: var(--um-color-primary);
  --um-avatar-blob-b: var(--um-color-accent-light);
  --um-avatar-skin: color-mix(in srgb, var(--um-color-bg-peach) 70%, var(--um-color-accent-light));
  --um-avatar-hair: color-mix(in srgb, var(--um-color-primary-dark) 80%, var(--um-color-midnight));
  --um-avatar-shirt: color-mix(in srgb, var(--um-color-primary) 74%, var(--um-color-bg-surface));
  --um-avatar-feature: var(--um-color-midnight);
}

.um-avatar-seed-6 {
  --um-avatar-surface-a: var(--um-color-bg-peach);
  --um-avatar-surface-b: var(--um-color-bg-page);
  --um-avatar-blob-a: var(--um-color-accent-dark);
  --um-avatar-blob-b: var(--um-color-primary-light);
  --um-avatar-skin: color-mix(in srgb, var(--um-color-bg-peach) 50%, var(--um-color-accent-dark));
  --um-avatar-hair: color-mix(in srgb, var(--um-color-midnight) 84%, var(--um-color-primary));
  --um-avatar-shirt: color-mix(in srgb, var(--um-color-success) 68%, var(--um-color-bg-surface));
  --um-avatar-feature: var(--um-color-midnight);
}

.um-avatar-seed-7 {
  --um-avatar-surface-a: color-mix(in srgb, var(--um-color-bg-page) 70%, var(--um-color-bg-lavender));
  --um-avatar-surface-b: var(--um-color-bg-surface);
  --um-avatar-blob-a: var(--um-color-success);
  --um-avatar-blob-b: var(--um-color-primary-light);
  --um-avatar-skin: color-mix(in srgb, var(--um-color-bg-peach) 64%, var(--um-color-accent));
  --um-avatar-hair: color-mix(in srgb, var(--um-color-primary-dark) 88%, var(--um-color-midnight));
  --um-avatar-shirt: color-mix(in srgb, var(--um-color-primary-light) 68%, var(--um-color-bg-surface));
  --um-avatar-feature: var(--um-color-midnight);
}

.um-avatar-face-1 .um-avatar-art__hair {
  left: 26%;
  width: 48%;
  height: 20%;
  border-radius: 65% 65% 38% 38%;
}

.um-avatar-face-1 .um-avatar-art__mouth {
  width: 10%;
  left: 46%;
  border-bottom-width: 1px;
}

.um-avatar-face-2 .um-avatar-art__hair {
  top: 14%;
  left: 24%;
  width: 52%;
  height: 26%;
  border-radius: 60% 60% 46% 46%;
}

.um-avatar-face-2 .um-avatar-art__eye {
  width: 5%;
  height: 5%;
}

.um-avatar-face-3 .um-avatar-art__hair {
  top: 18%;
  left: 30%;
  width: 40%;
  height: 18%;
  border-radius: var(--um-radius-full);
}

.um-avatar-face-3 .um-avatar-art__mouth {
  width: 14%;
  left: 44%;
  transform: translateY(1px);
}

.um-progress {
  width: 100%;
  height: 8px;
  background-color: var(--um-color-bg-page);
  border-radius: var(--um-radius-full);
  overflow: hidden;
}
.um-progress__fill {
  height: 100%;
  background-color: var(--um-color-success);
  border-radius: var(--um-radius-full);
  transition: width var(--um-transition-slow);
}

.um-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px var(--um-space-2);
  font-size: var(--um-text-caption);
  font-weight: var(--um-weight-semibold);
  border-radius: var(--um-radius-full);
  line-height: 1.4;
}
.um-badge--purple {
  background-color: var(--um-color-bg-lavender);
  color: var(--um-color-primary);
}
.um-badge--orange {
  background-color: var(--um-color-bg-peach);
  color: var(--um-color-accent);
}
.um-badge--green {
  background-color: color-mix(in srgb, var(--um-color-success) 18%, var(--um-color-bg-surface));
  color: var(--um-color-success);
}
.um-badge--red {
  background-color: color-mix(in srgb, var(--um-color-error) 12%, var(--um-color-bg-surface));
  color: var(--um-color-error);
}

/* Notification dot (unread messages badge) */
.um-badge--dot {
  width: 8px;
  height: 8px;
  padding: 0;
  background-color: var(--um-color-accent);
  border-radius: var(--um-radius-full);
}

/* Tag (for skills, interests, expertise) */
.um-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--um-space-1) var(--um-space-2);
  min-height: calc(var(--um-space-4) + var(--um-space-2));
  font-size: var(--um-text-caption);
  font-weight: var(--um-weight-medium);
  line-height: var(--um-leading-tight);
  background-color: var(--um-color-bg-lavender);
  color: var(--um-color-primary);
  border-radius: var(--um-radius-full);
}

/* Sent messages -- right-aligned, purple bg */
.um-bubble--sent {
  background-color: var(--um-color-primary);
  color: var(--um-color-bg-surface);
  border-radius: var(--um-radius-lg) var(--um-radius-lg) 4px var(--um-radius-lg);
  padding: var(--um-space-3) var(--um-space-4);
  max-width: 75%;
  margin-left: auto;
  font-size: var(--um-text-small);
  line-height: var(--um-leading-relaxed);
}

/* Received messages -- left-aligned, white bg */
.um-bubble--received {
  background-color: var(--um-color-bg-surface);
  color: var(--um-color-text);
  border-radius: var(--um-radius-lg) var(--um-radius-lg) var(--um-radius-lg) 4px;
  padding: var(--um-space-3) var(--um-space-4);
  max-width: 75%;
  font-size: var(--um-text-small);
  line-height: var(--um-leading-relaxed);
  border: 1px solid var(--um-color-border);
}

.um-modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: color-mix(in srgb, var(--um-color-midnight) 50%, transparent);
  z-index: var(--um-z-modal-backdrop);
}
.um-modal {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: var(--um-color-bg-surface);
  border-radius: var(--um-radius-lg);
  box-shadow: var(--um-shadow-modal);
  padding: var(--um-space-8);
  z-index: var(--um-z-modal);
  max-width: 520px;
  width: 90%;
}

.um-toast {
  position: fixed;
  top: var(--um-space-6);
  right: var(--um-space-6);
  z-index: var(--um-z-toast);
  padding: var(--um-space-4) var(--um-space-6);
  border-radius: var(--um-radius-md);
  box-shadow: var(--um-shadow-elevated);
  font-size: var(--um-text-small);
  font-weight: var(--um-weight-medium);
  animation: um-slide-in 250ms ease-out;
  transition: opacity 180ms ease, transform 180ms ease;
}
.um-toast--success {
  background-color: var(--um-color-success);
  color: var(--um-color-bg-surface);
}
.um-toast--error {
  background-color: var(--um-color-error);
  color: var(--um-color-bg-surface);
}
.um-toast--info {
  background-color: var(--um-color-primary);
  color: var(--um-color-bg-surface);
}
.um-toast--hiding {
  opacity: 0;
  transform: translateX(12px);
  pointer-events: none;
}

@keyframes um-slide-in {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

.um-skeleton {
  background: linear-gradient(
    90deg,
    var(--um-color-bg-page) 25%,
    var(--um-color-border-light) 50%,
    var(--um-color-bg-page) 75%
  );
  background-size: 200% 100%;
  animation: um-shimmer 1.5s infinite;
  border-radius: var(--um-radius-sm);
}
@keyframes um-shimmer {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}