/* ============================================
   ASSISTENTE DE DIAGNÓSTICO — UI premium
   ============================================ */

/* Modal overlay */
.diagnostic {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  display: flex;
  align-items: stretch;
  justify-content: center;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--dur-base) var(--ease-out);
}

.diagnostic[data-open="true"] {
  opacity: 1;
  pointer-events: auto;
}

.diagnostic__backdrop {
  position: absolute;
  inset: 0;
  background-color: rgba(7, 9, 13, 0.85);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
}

.diagnostic__panel {
  position: relative;
  width: 100%;
  max-width: 720px;
  margin: auto;
  display: flex;
  flex-direction: column;
  background: linear-gradient(180deg, var(--color-bg-elevated) 0%, var(--color-bg-base) 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl), 0 0 80px rgba(37, 99, 255, 0.15);
  overflow: hidden;
  max-height: 90vh;
  /* iOS bottom safe area */
  margin: var(--space-4);
  transform: translateY(20px);
  transition: transform var(--dur-base) var(--ease-out);
}

.diagnostic[data-open="true"] .diagnostic__panel {
  transform: translateY(0);
}

@media (max-width: 640px) {
  .diagnostic {
    align-items: flex-end;
  }
  .diagnostic__panel {
    max-height: 92vh;
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    margin: 0;
    margin-top: 8vh;
  }
}

/* Header */
.diagnostic__header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--color-border-subtle);
  background: var(--color-bg-elevated);
  position: relative;
}

.diagnostic__avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-brand-primary), var(--color-brand-primary-bright));
  display: grid;
  place-items: center;
  flex-shrink: 0;
  position: relative;
}

.diagnostic__avatar::after {
  content: '';
  position: absolute;
  bottom: -2px;
  right: -2px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--color-accent-success);
  border: 2px solid var(--color-bg-elevated);
}

.diagnostic__avatar svg {
  width: 20px;
  height: 20px;
  color: white;
}

.diagnostic__title {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.diagnostic__title-name {
  font-size: var(--fs-base);
  font-weight: var(--fw-semibold);
  color: var(--color-text-primary);
  letter-spacing: var(--ls-tight);
}

.diagnostic__title-status {
  font-size: var(--fs-xs);
  color: var(--color-text-tertiary);
  letter-spacing: var(--ls-wide);
}

.diagnostic__close {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  display: grid;
  place-items: center;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border-subtle);
  background: transparent;
  transition: all var(--dur-fast) var(--ease-out);
}

.diagnostic__close:hover {
  background: var(--color-bg-surface);
  color: var(--color-text-primary);
  border-color: var(--color-border);
}

/* Progress bar */
.diagnostic__progress {
  position: relative;
  height: 2px;
  background: var(--color-border-subtle);
  overflow: hidden;
}

.diagnostic__progress-bar {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--color-brand-primary), var(--color-brand-primary-bright));
  transition: width var(--dur-slow) var(--ease-out);
  box-shadow: 0 0 8px var(--color-brand-glow);
}

/* Conversation area */
.diagnostic__conversation {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
}

.msg {
  display: flex;
  gap: var(--space-3);
  max-width: 90%;
  animation: msgIn 380ms var(--ease-out) both;
}

@keyframes msgIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.msg--bot {
  align-self: flex-start;
}

.msg--user {
  align-self: flex-end;
  flex-direction: row-reverse;
}

.msg__bubble {
  padding: var(--space-3) var(--space-4);
  border-radius: 18px;
  font-size: var(--fs-sm);
  line-height: var(--lh-relaxed);
  word-wrap: break-word;
}

.msg--bot .msg__bubble {
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border-subtle);
  color: var(--color-text-primary);
  border-bottom-left-radius: 6px;
}

.msg--user .msg__bubble {
  background: linear-gradient(135deg, var(--color-brand-primary), var(--color-brand-primary-bright));
  color: white;
  border-bottom-right-radius: 6px;
  box-shadow: 0 4px 16px rgba(37, 99, 255, 0.25);
}

.msg__bubble p + p {
  margin-top: var(--space-3);
}

.msg__bubble strong {
  font-weight: var(--fw-semibold);
  color: var(--color-brand-primary-bright);
}

.msg--user .msg__bubble strong {
  color: white;
}

/* Typing indicator */
.typing {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: 18px;
  border-bottom-left-radius: 6px;
}

.typing span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-text-tertiary);
  animation: typingBounce 1.2s var(--ease-in-out) infinite;
}

.typing span:nth-child(2) {
  animation-delay: 0.15s;
}

.typing span:nth-child(3) {
  animation-delay: 0.3s;
}

@keyframes typingBounce {
  0%, 60%, 100% {
    transform: translateY(0);
    opacity: 0.5;
  }
  30% {
    transform: translateY(-6px);
    opacity: 1;
  }
}

/* Input area */
.diagnostic__input-area {
  padding: var(--space-4) var(--space-6) var(--space-6);
  border-top: 1px solid var(--color-border-subtle);
  background: var(--color-bg-elevated);
  position: relative;
}

.diagnostic__field {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.diagnostic__label {
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: var(--color-text-tertiary);
}

.diagnostic__options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--space-2);
}

.diagnostic__option {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text-primary);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  cursor: pointer;
  transition: all var(--dur-fast) var(--ease-out);
  text-align: left;
}

.diagnostic__option:hover {
  border-color: var(--color-brand-primary);
  background: rgba(37, 99, 255, 0.08);
  color: var(--color-brand-primary-bright);
  transform: translateY(-1px);
}

.diagnostic__option:active {
  transform: translateY(0);
}

.diagnostic__input-row {
  display: flex;
  gap: var(--space-2);
  align-items: flex-end;
}

.diagnostic__textinput {
  flex: 1;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  background: var(--color-bg-base);
  border: 1px solid var(--color-border);
  color: var(--color-text-primary);
  font-size: var(--fs-base);
  font-family: var(--font-sans);
  transition: border-color var(--dur-fast) var(--ease-out);
  width: 100%;
  /* iOS: prevent zoom */
  font-size: max(16px, var(--fs-base));
}

.diagnostic__textinput:focus {
  outline: none;
  border-color: var(--color-brand-primary);
  background: var(--color-bg-elevated);
}

.diagnostic__send {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-brand-primary), var(--color-brand-primary-bright));
  color: white;
  display: grid;
  place-items: center;
  transition: transform var(--dur-fast) var(--ease-out), opacity var(--dur-fast) var(--ease-out);
  box-shadow: 0 4px 12px rgba(37, 99, 255, 0.3);
}

.diagnostic__send:hover {
  transform: translateY(-2px);
}

.diagnostic__send:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* Final result state */
.diagnostic__result {
  padding: var(--space-6);
  background: linear-gradient(135deg, rgba(37, 99, 255, 0.08), transparent);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-brand);
  margin-bottom: var(--space-4);
}

.diagnostic__result-eyebrow {
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-widest);
  text-transform: uppercase;
  color: var(--color-brand-primary-bright);
  margin-bottom: var(--space-3);
}

.diagnostic__result-title {
  font-family: var(--font-display);
  font-size: var(--fs-xl);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-tight);
  line-height: var(--lh-snug);
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
}

.diagnostic__result-body {
  font-size: var(--fs-base);
  line-height: var(--lh-relaxed);
  color: var(--color-text-secondary);
}

.diagnostic__result-body p + p {
  margin-top: var(--space-4);
}

.diagnostic__result-body strong {
  color: var(--color-text-primary);
  font-weight: var(--fw-medium);
}

.diagnostic__result-cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

/* Floating diagnostic launcher */
.diag-fab {
  position: fixed;
  bottom: clamp(1rem, 3vw, 1.5rem);
  left: clamp(1rem, 3vw, 1.5rem);
  z-index: var(--z-sticky);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-full);
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border-brand);
  color: var(--color-text-primary);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4), 0 0 24px rgba(37, 99, 255, 0.15);
  transition: transform var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out);
  cursor: pointer;
}

.diag-fab:hover {
  transform: translateY(-3px);
  border-color: var(--color-brand-primary);
}

.diag-fab__pulse {
  position: relative;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-brand-primary);
  flex-shrink: 0;
}

.diag-fab__pulse::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: var(--color-brand-primary);
  animation: pulseRing 2s var(--ease-out) infinite;
}

@keyframes pulseRing {
  0% { transform: scale(1); opacity: 0.6; }
  100% { transform: scale(2.5); opacity: 0; }
}

@media (max-width: 640px) {
  .diag-fab span {
    display: none;
  }
  .diag-fab {
    width: 56px;
    height: 56px;
    padding: 0;
    justify-content: center;
  }
  .diag-fab__icon {
    width: 22px;
    height: 22px;
  }
}

.diag-fab__icon {
  width: 18px;
  height: 18px;
}