/* ==========================================================================
   Maxta Mind — Patient Intake Chat UI
   HIPAA-compliant telepsychiatry intake interface
   ========================================================================== */

/* --------------------------------------------------------------------------
   0. Custom Properties
   -------------------------------------------------------------------------- */
:root {
  /* Brand */
  --mm-bg:          #F5F8FC;
  --mm-card:        #FFFFFF;
  --mm-text:        #111620;
  --mm-muted:       #5C7090;
  --mm-border:      #D6DEE8;
  --mm-border-light:#E8EDF4;

  /* Accent */
  --mm-primary:     #1A6B8A;
  --mm-primary-dk:  #135368;
  --mm-primary-lt:  #E4F6FB;

  /* Status */
  --mm-success:     #16A34A;
  --mm-success-lt:  #DCFCE7;
  --mm-warning:     #F59E0B;
  --mm-warning-lt:  #FEF3C7;
  --mm-danger:      #DC2626;
  --mm-danger-lt:   #FEE2E2;

  /* Dimensions */
  --mm-radius:      8px;
  --mm-radius-lg:   12px;
  --mm-radius-xl:   16px;
  --mm-header-h:    56px;
  --mm-input-h:     72px;
  --mm-max-chat-w:  720px;

  /* Typography */
  --mm-font:        'DM Sans', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --mm-fs-xs:       0.75rem;
  --mm-fs-sm:       0.8125rem;
  --mm-fs-base:     0.9375rem;
  --mm-fs-md:       1.0625rem;
  --mm-fs-lg:       1.25rem;
  --mm-fs-xl:       1.5rem;
  --mm-fs-2xl:      1.75rem;

  /* Timing */
  --mm-ease:        cubic-bezier(0.4, 0, 0.2, 1);
  --mm-dur:         220ms;
}

/* --------------------------------------------------------------------------
   1. Reset & Base
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  height: 100%;
  -webkit-text-size-adjust: 100%;
}

body {
  height: 100%;
  font-family: var(--mm-font);
  font-size: var(--mm-fs-base);
  line-height: 1.6;
  color: var(--mm-text);
  background: var(--mm-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

input, textarea, select, button {
  font-family: inherit;
  font-size: inherit;
}

/* --------------------------------------------------------------------------
   2. Layout — Screens
   -------------------------------------------------------------------------- */
.screen {
  display: none;
  height: 100%;
  width: 100%;
}

.screen--active {
  display: flex;
}

/* 2a. Welcome Screen */
#welcome-screen {
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
  overflow-y: auto;
}

/* 2b. Chat Screen */
#chat-screen {
  flex-direction: column;
  overflow: hidden;
}

/* 2c. Complete Screen */
#complete-screen {
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
}

/* --------------------------------------------------------------------------
   3. Header Bar
   -------------------------------------------------------------------------- */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--mm-header-h);
  padding: 0 16px;
  background: var(--mm-text);
  color: #FFFFFF;
  flex-shrink: 0;
  z-index: 10;
}

.header__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: var(--mm-fs-md);
  letter-spacing: -0.01em;
}

.header__brand-icon {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  background: var(--mm-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 800;
  color: #fff;
}

.header__meta {
  display: flex;
  align-items: center;
  gap: 16px;
}

.header__timer {
  font-size: var(--mm-fs-sm);
  color: rgba(255,255,255,0.7);
  font-variant-numeric: tabular-nums;
}

.header__timer--warning {
  color: var(--mm-warning);
  font-weight: 600;
}

.header__timer--danger {
  color: var(--mm-danger);
  font-weight: 700;
  animation: pulse-text 1s ease-in-out infinite;
}

@keyframes pulse-text {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.header__btn {
  background: rgba(255,255,255,0.12);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.15);
  padding: 6px 14px;
  border-radius: var(--mm-radius);
  font-size: var(--mm-fs-sm);
  font-weight: 600;
  cursor: pointer;
  transition: background var(--mm-dur) var(--mm-ease);
}

.header__btn:hover {
  background: rgba(255,255,255,0.2);
}

.header__btn--danger {
  background: var(--mm-danger);
  border-color: var(--mm-danger);
}

.header__btn--danger:hover {
  background: #B91C1C;
}

/* --------------------------------------------------------------------------
   4. Welcome Card
   -------------------------------------------------------------------------- */
.welcome-card {
  width: 100%;
  max-width: 480px;
  background: var(--mm-card);
  border-radius: var(--mm-radius-xl);
  box-shadow: 0 1px 3px rgba(0,0,0,0.06), 0 8px 24px rgba(0,0,0,0.06);
  overflow: hidden;
  animation: card-enter 0.4s var(--mm-ease) both;
}

@keyframes card-enter {
  from { opacity: 0; transform: translateY(16px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.welcome-card__header {
  padding: 32px 32px 24px;
  text-align: center;
  border-bottom: 1px solid var(--mm-border-light);
}

.welcome-card__logo {
  width: 52px;
  height: 52px;
  margin: 0 auto 16px;
  background: var(--mm-primary);
  border-radius: var(--mm-radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 800;
  font-size: 20px;
}

.welcome-card__title {
  font-size: var(--mm-fs-xl);
  font-weight: 700;
  color: var(--mm-text);
  margin-bottom: 6px;
  letter-spacing: -0.02em;
}

.welcome-card__subtitle {
  font-size: var(--mm-fs-sm);
  color: var(--mm-muted);
  max-width: 340px;
  margin: 0 auto;
}

.welcome-card__body {
  padding: 24px 32px 32px;
}

/* --------------------------------------------------------------------------
   5. Form
   -------------------------------------------------------------------------- */
.form__group {
  margin-bottom: 16px;
}

.form__label {
  display: block;
  font-size: var(--mm-fs-sm);
  font-weight: 600;
  color: var(--mm-text);
  margin-bottom: 5px;
}

.form__label--required::after {
  content: ' *';
  color: var(--mm-danger);
}

.form__input,
.form__select {
  width: 100%;
  height: 42px;
  padding: 0 12px;
  border: 1.5px solid var(--mm-border);
  border-radius: var(--mm-radius);
  font-size: var(--mm-fs-base);
  color: var(--mm-text);
  background: var(--mm-card);
  transition: border-color var(--mm-dur) var(--mm-ease), box-shadow var(--mm-dur) var(--mm-ease);
  outline: none;
}

.form__input::placeholder {
  color: var(--mm-muted);
  opacity: 0.6;
}

.form__input:focus,
.form__select:focus {
  border-color: var(--mm-primary);
  box-shadow: 0 0 0 3px rgba(26, 107, 138, 0.12);
}

/* Validation states */
.field--error .form__input,
.field--error .form__select {
  border-color: var(--mm-danger);
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.08);
}

.field--valid .form__input,
.field--valid .form__select {
  border-color: var(--mm-success);
}

.form__error {
  display: none;
  font-size: var(--mm-fs-xs);
  color: var(--mm-danger);
  margin-top: 4px;
  line-height: 1.4;
}

.field--error .form__error {
  display: block;
  animation: shake 0.3s var(--mm-ease);
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}

.form__row {
  display: flex;
  gap: 12px;
}

.form__row > .form__group {
  flex: 1;
}

/* Submit */
.form__submit {
  width: 100%;
  height: 46px;
  margin-top: 8px;
  background: var(--mm-primary);
  color: #fff;
  border: none;
  border-radius: var(--mm-radius);
  font-size: var(--mm-fs-base);
  font-weight: 700;
  cursor: pointer;
  transition: background var(--mm-dur) var(--mm-ease), transform 80ms var(--mm-ease);
}

.form__submit:hover {
  background: var(--mm-primary-dk);
}

.form__submit:active {
  transform: scale(0.985);
}

.form__submit:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

.form__submit--loading {
  position: relative;
  color: transparent;
}

.form__submit--loading::after {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  width: 20px; height: 20px;
  margin: -10px 0 0 -10px;
  border: 2.5px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* --------------------------------------------------------------------------
   6. Chat Area
   -------------------------------------------------------------------------- */
.chat {
  display: flex;
  flex-direction: column;
  flex: 1;
  overflow: hidden;
}

.chat__messages {
  flex: 1;
  overflow-y: auto;
  padding: 20px 16px;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
}

.chat__messages-inner {
  max-width: var(--mm-max-chat-w);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

/* --------------------------------------------------------------------------
   7. Messages
   -------------------------------------------------------------------------- */
.msg {
  display: flex;
  flex-direction: column;
  max-width: 78%;
  animation: msg-in 0.3s var(--mm-ease) both;
}

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

/* Patient message — right aligned, teal */
.msg--patient {
  align-self: flex-end;
}

.msg--patient .msg__bubble {
  background: var(--mm-primary);
  color: #fff;
  border-radius: var(--mm-radius-lg) var(--mm-radius-lg) 4px var(--mm-radius-lg);
}

/* AI message — left aligned, gray card */
.msg--ai {
  align-self: flex-start;
}

.msg--ai .msg__bubble {
  background: var(--mm-card);
  color: var(--mm-text);
  border: 1px solid var(--mm-border-light);
  border-radius: var(--mm-radius-lg) var(--mm-radius-lg) var(--mm-radius-lg) 4px;
  box-shadow: 0 1px 2px rgba(0,0,0,0.04);
}

.msg__bubble {
  padding: 10px 16px;
  font-size: var(--mm-fs-base);
  line-height: 1.55;
  word-break: break-word;
  white-space: pre-wrap;
}

.msg__time {
  font-size: var(--mm-fs-xs);
  color: var(--mm-muted);
  margin-top: 3px;
  padding: 0 4px;
}

.msg--patient .msg__time {
  text-align: right;
}

/* System message */
.msg--system {
  align-self: center;
  max-width: 90%;
}

.msg--system .msg__bubble {
  background: var(--mm-primary-lt);
  color: var(--mm-primary-dk);
  border-radius: var(--mm-radius);
  font-size: var(--mm-fs-sm);
  text-align: center;
  border: 1px solid rgba(26,107,138,0.12);
}

/* --------------------------------------------------------------------------
   8. Typing Indicator
   -------------------------------------------------------------------------- */
.typing-indicator {
  align-self: flex-start;
  display: none;
  padding: 12px 20px;
  background: var(--mm-card);
  border: 1px solid var(--mm-border-light);
  border-radius: var(--mm-radius-lg) var(--mm-radius-lg) var(--mm-radius-lg) 4px;
  box-shadow: 0 1px 2px rgba(0,0,0,0.04);
  gap: 5px;
  animation: msg-in 0.3s var(--mm-ease) both;
}

.typing-indicator--visible {
  display: flex;
}

.typing-indicator__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--mm-muted);
  opacity: 0.4;
  animation: typing-bounce 1.4s ease-in-out infinite;
}

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

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

@keyframes typing-bounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30%            { transform: translateY(-6px); opacity: 1; }
}

/* --------------------------------------------------------------------------
   9. Chat Input Area
   -------------------------------------------------------------------------- */
.chat-input {
  flex-shrink: 0;
  border-top: 1px solid var(--mm-border-light);
  background: var(--mm-card);
  padding: 12px 16px;
}

.chat-input__inner {
  max-width: var(--mm-max-chat-w);
  margin: 0 auto;
  display: flex;
  gap: 10px;
  align-items: flex-end;
}

.chat-input__textarea {
  flex: 1;
  min-height: 42px;
  max-height: 120px;
  padding: 10px 14px;
  border: 1.5px solid var(--mm-border);
  border-radius: var(--mm-radius-lg);
  font-size: var(--mm-fs-base);
  line-height: 1.5;
  color: var(--mm-text);
  background: var(--mm-bg);
  resize: none;
  outline: none;
  transition: border-color var(--mm-dur) var(--mm-ease);
}

.chat-input__textarea:focus {
  border-color: var(--mm-primary);
}

.chat-input__textarea:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.chat-input__send {
  width: 42px;
  height: 42px;
  flex-shrink: 0;
  border: none;
  border-radius: 50%;
  background: var(--mm-primary);
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--mm-dur) var(--mm-ease), transform 80ms var(--mm-ease);
}

.chat-input__send:hover {
  background: var(--mm-primary-dk);
}

.chat-input__send:active {
  transform: scale(0.92);
}

.chat-input__send:disabled {
  background: var(--mm-border);
  cursor: not-allowed;
  transform: none;
}

.chat-input__send svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.chat-input__footer {
  max-width: var(--mm-max-chat-w);
  margin: 6px auto 0;
  display: flex;
  justify-content: space-between;
  font-size: var(--mm-fs-xs);
  color: var(--mm-muted);
}

.chat-input__char-count--over {
  color: var(--mm-danger);
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   10. Consent Banner
   -------------------------------------------------------------------------- */
.consent-banner {
  display: none;
  padding: 12px 16px;
  background: var(--mm-warning-lt);
  border-bottom: 1px solid rgba(245, 158, 11, 0.2);
  font-size: var(--mm-fs-sm);
  color: #92400E;
  text-align: center;
  line-height: 1.5;
}

.consent-banner--visible {
  display: block;
}

.consent-banner--blocked {
  background: var(--mm-danger-lt);
  border-bottom-color: rgba(220, 38, 38, 0.15);
  color: var(--mm-danger);
}

/* --------------------------------------------------------------------------
   11. Degradation Notice
   -------------------------------------------------------------------------- */
.degradation-notice {
  display: none;
  max-width: var(--mm-max-chat-w);
  margin: 0 auto 8px;
  padding: 10px 14px;
  background: var(--mm-warning-lt);
  border: 1px solid rgba(245, 158, 11, 0.25);
  border-radius: var(--mm-radius);
  font-size: var(--mm-fs-sm);
  color: #92400E;
  text-align: center;
  animation: msg-in 0.3s var(--mm-ease) both;
}

.degradation-notice--visible {
  display: block;
}

.degradation-notice--critical {
  background: var(--mm-danger-lt);
  border-color: rgba(220, 38, 38, 0.2);
  color: var(--mm-danger);
}

/* --------------------------------------------------------------------------
   12. Risk Badge (internal, hidden from patient)
   -------------------------------------------------------------------------- */
.risk-badge {
  display: none !important;
  visibility: hidden;
  position: absolute;
  pointer-events: none;
}

/* --------------------------------------------------------------------------
   13. Complete Card
   -------------------------------------------------------------------------- */
.complete-card {
  width: 100%;
  max-width: 440px;
  background: var(--mm-card);
  border-radius: var(--mm-radius-xl);
  box-shadow: 0 1px 3px rgba(0,0,0,0.06), 0 8px 24px rgba(0,0,0,0.06);
  padding: 40px 32px;
  text-align: center;
  animation: card-enter 0.4s var(--mm-ease) both;
}

.complete-card__icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  background: var(--mm-success-lt);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  color: var(--mm-success);
}

.complete-card__title {
  font-size: var(--mm-fs-xl);
  font-weight: 700;
  color: var(--mm-text);
  margin-bottom: 8px;
}

.complete-card__message {
  font-size: var(--mm-fs-base);
  color: var(--mm-muted);
  margin-bottom: 24px;
  line-height: 1.6;
}

.complete-card__ref {
  display: inline-block;
  padding: 8px 20px;
  background: var(--mm-bg);
  border-radius: var(--mm-radius);
  font-size: var(--mm-fs-sm);
  color: var(--mm-text);
  font-weight: 600;
  border: 1px solid var(--mm-border-light);
}

/* --------------------------------------------------------------------------
   14. Toast Notifications
   -------------------------------------------------------------------------- */
.toast-container {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast {
  min-width: 280px;
  max-width: 400px;
  padding: 12px 16px;
  background: var(--mm-card);
  border-radius: var(--mm-radius);
  box-shadow: 0 4px 16px rgba(0,0,0,0.12);
  border-left: 4px solid var(--mm-muted);
  font-size: var(--mm-fs-sm);
  color: var(--mm-text);
  pointer-events: auto;
  animation: toast-in 0.3s var(--mm-ease) both;
}

.toast--error {
  border-left-color: var(--mm-danger);
}

.toast--warning {
  border-left-color: var(--mm-warning);
}

.toast--success {
  border-left-color: var(--mm-success);
}

.toast--out {
  animation: toast-out 0.25s var(--mm-ease) forwards;
}

@keyframes toast-in {
  from { opacity: 0; transform: translateX(40px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes toast-out {
  from { opacity: 1; transform: translateX(0); }
  to   { opacity: 0; transform: translateX(40px); }
}

/* --------------------------------------------------------------------------
   15. Confirm Dialog Overlay
   -------------------------------------------------------------------------- */
.dialog-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.dialog-overlay--visible {
  display: flex;
}

.dialog {
  width: 100%;
  max-width: 380px;
  background: var(--mm-card);
  border-radius: var(--mm-radius-lg);
  box-shadow: 0 8px 32px rgba(0,0,0,0.16);
  padding: 28px 24px 20px;
  text-align: center;
  animation: card-enter 0.25s var(--mm-ease) both;
}

.dialog__title {
  font-size: var(--mm-fs-md);
  font-weight: 700;
  margin-bottom: 8px;
}

.dialog__message {
  font-size: var(--mm-fs-sm);
  color: var(--mm-muted);
  margin-bottom: 20px;
}

.dialog__actions {
  display: flex;
  gap: 10px;
}

.dialog__btn {
  flex: 1;
  height: 40px;
  border: 1.5px solid var(--mm-border);
  border-radius: var(--mm-radius);
  font-size: var(--mm-fs-sm);
  font-weight: 600;
  cursor: pointer;
  background: var(--mm-card);
  color: var(--mm-text);
  transition: background var(--mm-dur) var(--mm-ease);
}

.dialog__btn:hover {
  background: var(--mm-bg);
}

.dialog__btn--confirm {
  background: var(--mm-danger);
  color: #fff;
  border-color: var(--mm-danger);
}

.dialog__btn--confirm:hover {
  background: #B91C1C;
}

/* --------------------------------------------------------------------------
   16. Responsive — Mobile
   -------------------------------------------------------------------------- */
@media (max-width: 600px) {
  .welcome-card__header,
  .welcome-card__body {
    padding-left: 20px;
    padding-right: 20px;
  }

  .welcome-card__header {
    padding-top: 24px;
    padding-bottom: 20px;
  }

  .welcome-card__body {
    padding-bottom: 24px;
  }

  .form__row {
    flex-direction: column;
    gap: 0;
  }

  .msg {
    max-width: 88%;
  }

  .header__meta {
    gap: 10px;
  }

  .header__timer {
    font-size: var(--mm-fs-xs);
  }

  .complete-card {
    padding: 32px 20px;
  }

  .toast {
    min-width: 0;
    max-width: calc(100vw - 32px);
  }
}

/* --------------------------------------------------------------------------
   17. Utility helpers
   -------------------------------------------------------------------------- */
.u-sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}

.u-hidden {
  display: none !important;
}

/* --------------------------------------------------------------------------
   18. Scrollbar (Webkit)
   -------------------------------------------------------------------------- */
.chat__messages::-webkit-scrollbar {
  width: 6px;
}

.chat__messages::-webkit-scrollbar-track {
  background: transparent;
}

.chat__messages::-webkit-scrollbar-thumb {
  background: var(--mm-border);
  border-radius: 3px;
}

.chat__messages::-webkit-scrollbar-thumb:hover {
  background: var(--mm-muted);
}