/* RememberMe AI · style.css
 * Colour tokens, layout, components, animations, and responsive rules.
 */

/* ---------- Design tokens ---------- */
:root {
  --color-bg: #f7f4ec;
  --color-surface: #fffdf8;
  --color-surface-muted: #f1eee4;
  --color-ink: #22292a;
  --color-muted: #5a6361;
  --color-primary: #1f4d45;
  --color-primary-strong: #163a34;
  --color-sage: #a9bfa8;
  --color-sage-soft: #e3ebe0;
  --color-border: #e2dccd;
  --color-warning: #7a4d0e;
  --color-warning-bg: #fbf1dc;
  --color-danger: #8e3527;
  --color-danger-bg: #f8e7e3;
  --color-focus: #1f4d45;

  --shadow-soft: 0 1px 2px rgba(34, 41, 42, 0.06), 0 8px 24px rgba(34, 41, 42, 0.06);
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 6px;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;

  --font-body: system-ui, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-display: Georgia, "Iowan Old Style", "Palatino Linotype", serif;

  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
}

/* ---------- Base ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 1rem;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.55;
  color: var(--color-ink);
  background: var(--color-bg);
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.2;
  font-weight: 600;
}

h1 {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  font-weight: 400;
}

h2 {
  font-size: 1.2rem;
}

h3 {
  font-size: 1rem;
}

p {
  margin: 0;
}

button,
input {
  font: inherit;
  color: inherit;
}

svg {
  display: block;
  max-width: 100%;
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
  padding: 0;
  margin: -1px;
}

.skip-link {
  position: absolute;
  left: var(--space-4);
  top: -100px;
  z-index: 100;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  background: var(--color-primary);
  color: #fffdf8;
}

.skip-link:focus {
  top: var(--space-2);
}

:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
}

/* ---------- Header ---------- */
.site-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-4) clamp(1rem, 4vw, 3rem);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.brand__logo {
  width: 40px;
  height: 40px;
  color: var(--color-primary);
}

.brand__name {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--color-primary-strong);
}

.brand__tagline {
  font-size: 0.85rem;
  color: var(--color-muted);
}

.site-header__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
}

.date-indicator {
  padding: 0 var(--space-2);
  font-size: 0.9rem;
  color: var(--color-muted);
}

/* ---------- Page layout ---------- */
.page {
  max-width: 1180px;
  margin: 0 auto;
  padding: var(--space-8) clamp(1rem, 4vw, 3rem) var(--space-6);
}

.welcome {
  margin-bottom: var(--space-6);
}

.welcome__lead {
  margin-top: var(--space-2);
  font-size: 1.15rem;
  color: var(--color-primary);
}

.welcome__sub {
  margin-top: var(--space-1);
  color: var(--color-muted);
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  gap: var(--space-6);
  align-items: start;
}

.workspace {
  display: grid;
  gap: var(--space-6);
  min-width: 0;
}

.panel {
  min-width: 0;
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
}

.panel > h2 {
  margin-bottom: var(--space-4);
}

.assistant {
  position: sticky;
  top: var(--space-4);
}

.assistant__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

/* ---------- Voice orb ---------- */
.orb {
  position: relative;
  width: 150px;
  height: 150px;
  margin: var(--space-4) auto var(--space-6);
}

.orb__ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1.5px solid var(--color-sage);
  opacity: 0;
}

.orb__core {
  position: absolute;
  inset: 22px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: #fffdf8;
  background: radial-gradient(circle at 35% 30%, #3d7266, var(--color-primary));
  box-shadow: 0 10px 30px rgba(31, 77, 69, 0.25);
  animation: breathe 4.5s ease-in-out infinite;
  transition: background var(--transition-base);
}

.orb__mark {
  width: 52px;
  height: 52px;
}

.mark-ring {
  transform-box: view-box;
  transform-origin: center;
}

.orb__wave {
  position: absolute;
  left: 50%;
  bottom: -30px;
  display: flex;
  align-items: flex-end;
  gap: 4px;
  height: 18px;
  transform: translateX(-50%);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.orb__wave i {
  display: block;
  width: 4px;
  height: 100%;
  border-radius: 2px;
  background: var(--color-primary);
  transform-origin: bottom;
}

/* Visual states, driven by the data-state attribute set in script.js */
.orb[data-state="listening"] .orb__ring {
  animation: ripple 2.4s ease-out infinite;
}

.orb[data-state="listening"] .orb__ring--2 {
  animation-delay: 1.2s;
}

.orb[data-state="listening"] .orb__core {
  background: radial-gradient(circle at 35% 30%, #5d8f7e, #2b6157);
}

.orb[data-state="processing"] .orb__core {
  animation-duration: 2.2s;
}

.orb[data-state="processing"] .mark-ring {
  animation: spin 1.4s linear infinite;
}

.orb[data-state="speaking"] .orb__wave {
  opacity: 1;
}

.orb[data-state="speaking"] .orb__wave i {
  animation: wave 0.9s ease-in-out infinite;
}

.orb[data-state="speaking"] .orb__wave i:nth-child(2) { animation-delay: 0.15s; }
.orb[data-state="speaking"] .orb__wave i:nth-child(3) { animation-delay: 0.3s; }
.orb[data-state="speaking"] .orb__wave i:nth-child(4) { animation-delay: 0.45s; }
.orb[data-state="speaking"] .orb__wave i:nth-child(5) { animation-delay: 0.6s; }

.orb[data-state="error"] .orb__core {
  color: var(--color-danger);
  background: var(--color-surface-muted);
  border: 2px solid var(--color-danger);
  box-shadow: none;
  animation: none;
}

.assistant__status {
  margin-bottom: var(--space-4);
  text-align: center;
  font-weight: 600;
  color: var(--color-primary-strong);
}

/* ---------- Conversation ---------- */
.chat-log {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  min-height: 220px;
  max-height: 340px;
  margin-bottom: var(--space-4);
  padding: var(--space-3);
  overflow-y: auto;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.message {
  max-width: 88%;
  animation: fade-in 220ms ease-out;
}

.message--user {
  align-self: flex-end;
}

.message--assistant {
  align-self: flex-start;
}

.message__text {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  white-space: pre-line;
  overflow-wrap: anywhere;
}

.message--user .message__text {
  background: var(--color-sage-soft);
}

.message--assistant .message__text {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}

.composer {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  gap: var(--space-2);
  align-items: center;
}

.composer input[type="text"] {
  width: 100%;
  min-height: 48px;
  padding: var(--space-3) var(--space-4);
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.composer input[type="text"]:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(31, 77, 69, 0.15);
}

.hint {
  margin-top: var(--space-2);
  font-size: 0.85rem;
  color: var(--color-muted);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 44px;
  padding: var(--space-2) var(--space-4);
  font-weight: 600;
  cursor: pointer;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.btn:active {
  transform: translateY(1px);
}

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

.btn--primary {
  background: var(--color-primary);
  color: #fffdf8;
}

.btn--primary:hover {
  background: var(--color-primary-strong);
}

.btn--ghost {
  background: var(--color-surface);
  border-color: var(--color-border);
  color: var(--color-primary-strong);
}

.btn--ghost:hover {
  background: var(--color-sage-soft);
  border-color: var(--color-sage);
}

.btn--text {
  min-height: 36px;
  padding: var(--space-1) var(--space-2);
  font-weight: 500;
  color: var(--color-muted);
}

.btn--text:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.btn--icon {
  width: 48px;
  padding: 0;
  background: var(--color-surface);
  border-color: var(--color-border);
  color: var(--color-primary);
}

.btn--icon[aria-pressed="true"] {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fffdf8;
}

.btn--small {
  min-height: 36px;
  padding: var(--space-1) var(--space-3);
  font-size: 0.9rem;
}

.btn--danger {
  background: var(--color-surface);
  border-color: #e7c9c2;
  color: var(--color-danger);
}

.btn--danger:hover {
  background: var(--color-danger-bg);
}

/* ---------- Example prompts ---------- */
.examples {
  margin-top: var(--space-6);
}

.examples__label {
  margin-bottom: var(--space-2);
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.examples__list {
  display: grid;
  gap: var(--space-2);
}

.example {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  cursor: pointer;
  background: transparent;
  border: 1px dashed var(--color-sage);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast), border-style var(--transition-fast);
}

.example:hover {
  background: var(--color-sage-soft);
  border-style: solid;
}

/* ---------- Statistics ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-3);
  margin: 0;
}

.stat {
  padding: var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.stat dt {
  font-size: 0.85rem;
  color: var(--color-muted);
}

.stat dd {
  margin: var(--space-1) 0 0;
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--color-primary-strong);
}

/* ---------- Reminder list ---------- */
.list-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  padding: 4px;
  background: var(--color-surface-muted);
  border-radius: var(--radius-md);
}

.filter {
  min-height: 36px;
  padding: var(--space-1) var(--space-3);
  background: transparent;
  border: 0;
  border-radius: var(--radius-sm);
  color: var(--color-muted);
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.filter:hover {
  color: var(--color-ink);
}

.filter[aria-pressed="true"] {
  background: var(--color-surface);
  color: var(--color-primary-strong);
  font-weight: 600;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08);
}

.reminder-list {
  display: grid;
  gap: var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
}

.reminder-card {
  padding: var(--space-4);
  background: #fff;
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-md);
  transition: opacity var(--transition-base), border-color var(--transition-base);
}

.reminder-card.is-overdue {
  border-left-color: var(--color-warning);
}

.reminder-card.is-completed {
  border-left-color: var(--color-sage);
  opacity: 0.8;
}

.reminder-card.is-completed .reminder-card__title {
  text-decoration: line-through;
  text-decoration-color: var(--color-muted);
}

.reminder-card.just-completed {
  animation: settle 500ms ease-out;
}

.reminder-card__header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2) var(--space-3);
}

.reminder-card__title {
  overflow-wrap: anywhere;
}

.reminder-card__meta {
  margin-top: var(--space-1);
  font-size: 0.9rem;
  color: var(--color-muted);
}

.reminder-card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-3);
}

.badge {
  display: inline-block;
  padding: 2px var(--space-2);
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
}

.badge--scheduled {
  background: var(--color-sage-soft);
  color: var(--color-primary-strong);
}

.badge--overdue {
  background: var(--color-warning-bg);
  color: var(--color-warning);
}

.badge--done {
  background: var(--color-surface-muted);
  color: var(--color-muted);
}

.empty-state {
  padding: var(--space-6) var(--space-4);
  text-align: center;
  color: var(--color-muted);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-md);
}

/* ---------- Notices, due banner, toast ---------- */
.due-banner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
  padding: var(--space-4) var(--space-6);
  background: var(--color-warning-bg);
  border: 1px solid #ecd39e;
  border-left: 4px solid var(--color-warning);
  border-radius: var(--radius-md);
  color: var(--color-warning);
}

.due-banner__actions {
  display: flex;
  gap: var(--space-2);
}

.notice {
  margin-bottom: var(--space-4);
  padding: var(--space-3) var(--space-4);
  background: var(--color-danger-bg);
  border-radius: var(--radius-md);
  color: var(--color-danger);
  font-size: 0.95rem;
}

.notice-text {
  margin-bottom: var(--space-2);
}

.toast {
  position: fixed;
  left: 50%;
  bottom: calc(var(--space-4) + env(safe-area-inset-bottom, 0px));
  z-index: 50;
  max-width: min(90vw, 460px);
  padding: var(--space-3) var(--space-4);
  background: var(--color-primary-strong);
  color: #fffdf8;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft);
  font-size: 0.95rem;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 1rem);
  transition: opacity var(--transition-base), transform var(--transition-base);
}

.toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

.toast[data-tone="error"] {
  background: var(--color-danger);
}

/* ---------- Edit dialog ---------- */
.dialog {
  width: min(92vw, 460px);
  padding: 0;
  color: var(--color-ink);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: 0 24px 60px rgba(34, 41, 42, 0.2);
}

.dialog::backdrop {
  background: rgba(34, 41, 42, 0.35);
}

.edit-form {
  display: grid;
  gap: var(--space-3);
  padding: var(--space-6);
}

.edit-form label {
  display: block;
  margin-bottom: var(--space-1);
  font-size: 0.9rem;
  font-weight: 600;
}

.edit-form input {
  width: 100%;
  min-height: 44px;
  padding: var(--space-2) var(--space-3);
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.edit-form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}

.edit-form__actions {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-2);
  margin-top: var(--space-2);
}

.form-error {
  min-height: 1.25em;
  font-size: 0.9rem;
  color: var(--color-danger);
}

/* ---------- Footer ---------- */
.site-footer {
  max-width: 1180px;
  margin: 0 auto;
  padding: var(--space-6) clamp(1rem, 4vw, 3rem) var(--space-8);
  font-size: 0.85rem;
  color: var(--color-muted);
}

.site-footer p + p {
  margin-top: var(--space-1);
}

/* ---------- Animations ---------- */
@keyframes breathe {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.04); }
}

@keyframes ripple {
  0% { transform: scale(0.85); opacity: 0.7; }
  100% { transform: scale(1.35); opacity: 0; }
}

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

@keyframes wave {
  0%, 100% { transform: scaleY(0.3); }
  50% { transform: scaleY(1); }
}

@keyframes fade-in {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: none; }
}

@keyframes settle {
  from { transform: scale(0.99); }
  to { transform: none; }
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .assistant {
    position: static;
  }
}

@media (max-width: 480px) {
  .panel {
    padding: var(--space-4);
  }

  .orb {
    width: 124px;
    height: 124px;
  }

  .orb__core {
    inset: 18px;
  }

  .composer {
    grid-template-columns: minmax(0, 1fr) 44px auto;
  }

  .btn--icon {
    width: 44px;
  }

  .stat dd {
    font-size: 1.6rem;
  }

  .edit-form__row {
    grid-template-columns: 1fr;
  }

  .site-header__actions {
    width: 100%;
  }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .orb[data-state="listening"] .orb__ring {
    animation: none;
    opacity: 0.5;
  }

  .orb[data-state="speaking"] .orb__wave i {
    animation: none;
    transform: scaleY(0.6);
  }
}