/* ============================================================
   Knowledge Absorber — Warm, calm, paper-like stylesheet
   ============================================================ */

/* --- Custom Properties --- */

:root {
  /* Light mode — warm parchment */
  --bg-primary: #faf6f0;
  --bg-secondary: #f5f0e8;
  --bg-input: #ffffff;
  --text-primary: #3d3632;
  --text-secondary: #7a6f66;
  --text-muted: #a89f96;
  --border: #e8e0d6;
  --accent: #c4956a;
  --accent-hover: #b5845c;
  --accent-soft: #f0e2d3;
  --pill-bg: #f0ebe4;
  --pill-hover-bg: #e8e0d6;
  --pill-active-bg: #c4956a;
  --pill-active-text: #ffffff;
  --toast-bg: #e8f5e2;
  --toast-text: #3d6832;
  --danger: #c45a5a;
  --danger-hover: #b34a4a;
  --shadow: rgba(60, 50, 40, 0.06);
  --focus-ring: rgba(196, 149, 106, 0.4);
  --font-serif: 'Lora', Georgia, serif;
  --font-sans: 'Source Sans 3', system-ui, sans-serif;
  --radius: 8px;
  --radius-sm: 6px;
  --transition: 200ms ease;
  --transition-slow: 350ms ease;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #2a2520;
    --bg-secondary: #332e28;
    --bg-input: #3d3632;
    --text-primary: #e8e0d6;
    --text-secondary: #b0a69c;
    --text-muted: #7a6f66;
    --border: #4a433c;
    --accent: #d4a57a;
    --accent-hover: #c4956a;
    --accent-soft: #4a3f34;
    --pill-bg: #3d3632;
    --pill-hover-bg: #4a433c;
    --pill-active-bg: #d4a57a;
    --pill-active-text: #2a2520;
    --toast-bg: #2d3a28;
    --toast-text: #a8d4a0;
    --danger: #d47a7a;
    --danger-hover: #c46a6a;
    --shadow: rgba(0, 0, 0, 0.2);
    --focus-ring: rgba(212, 165, 122, 0.4);
  }
}


/* --- Reset & Base --- */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  min-height: 100%;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Prevent iOS zoom on inputs */
input,
textarea,
select,
button {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}


/* --- Screen Toggling --- */

.screen[hidden] {
  display: none !important;
}

.screen {
  min-height: 100vh;
  min-height: 100dvh;
}


/* ============================================================
   LOGIN SCREEN
   ============================================================ */

#login-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.login-container {
  width: 100%;
  max-width: 360px;
  text-align: center;
}

.login-title {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 40px;
  letter-spacing: -0.01em;
}

#login-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

#login-form input[type="password"] {
  width: 100%;
  padding: 14px 16px;
  font-size: 16px; /* Prevents iOS zoom */
  background-color: var(--bg-input);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

#login-form input[type="password"]::placeholder {
  color: var(--text-muted);
}

#login-form input[type="password"]:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--focus-ring);
}

.login-btn {
  width: 100%;
  padding: 14px 24px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--pill-active-text);
  background-color: var(--accent);
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background-color var(--transition), transform var(--transition);
}

.login-btn:hover {
  background-color: var(--accent-hover);
}

.login-btn:active {
  transform: scale(0.98);
}

.login-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.login-error {
  font-size: 0.875rem;
  color: var(--danger);
  margin-top: 4px;
}

.login-error[hidden] {
  display: none;
}


/* ============================================================
   CAPTURE SCREEN
   ============================================================ */

#capture-screen {
  display: flex;
  flex-direction: column;
  padding: 0 20px env(safe-area-inset-bottom, 0);
}

/* Container constraint for wider screens */
.capture-header,
.capture-main,
.recent-section {
  width: 100%;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}


/* --- Capture Header --- */

.capture-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding-top: 24px;
  padding-bottom: 8px;
}

.app-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.daily-count {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

.daily-count:empty {
  display: none;
}


/* --- Capture Main --- */

.capture-main {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding-top: 16px;
  padding-bottom: 24px;
}


/* --- Title Section --- */

.title-section {
  display: flex;
  flex-direction: column;
}

.title-toggle {
  align-self: flex-start;
  font-size: 0.875rem;
  color: var(--text-muted);
  padding: 4px 0;
  transition: color var(--transition);
}

.title-toggle:hover {
  color: var(--accent);
}

.title-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 2px;
}

.title-input {
  width: 100%;
  padding: 10px 14px;
  font-size: 16px;
  font-weight: 600;
  background-color: var(--bg-input);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  outline: none;
  margin-top: 8px;
  transition: border-color var(--transition), box-shadow var(--transition),
              opacity var(--transition-slow), max-height var(--transition-slow);
}

.title-input::placeholder {
  color: var(--text-muted);
  font-weight: 400;
}

.title-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--focus-ring);
}

.title-input[hidden] {
  display: none;
}


/* --- Note Textarea --- */

.note-input {
  width: 100%;
  min-height: 140px;
  padding: 14px 16px;
  font-size: 16px; /* Prevents iOS zoom */
  line-height: 1.6;
  background-color: var(--bg-input);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  outline: none;
  resize: vertical;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.note-input::placeholder {
  color: var(--text-muted);
  font-style: italic;
  font-family: var(--font-serif);
}

.note-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--focus-ring);
}


/* --- Category Pills --- */

.category-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.pill {
  padding: 7px 16px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  background-color: var(--pill-bg);
  border: 1.5px solid transparent;
  border-radius: 100px;
  transition: background-color var(--transition), color var(--transition),
              border-color var(--transition), transform var(--transition);
  user-select: none;
  -webkit-user-select: none;
}

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

.pill:active {
  transform: scale(0.96);
}

.pill.active {
  background-color: var(--pill-active-bg);
  color: var(--pill-active-text);
  border-color: transparent;
}

.pill:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}


/* --- Capture Button --- */

.capture-btn {
  width: 100%;
  padding: 14px 24px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--pill-active-text);
  background-color: var(--accent);
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background-color var(--transition), transform var(--transition),
              opacity var(--transition);
}

.capture-btn:hover {
  background-color: var(--accent-hover);
}

.capture-btn:active {
  transform: scale(0.98);
}

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

.capture-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}


/* --- Toast --- */

.toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%) translateY(16px);
  padding: 10px 24px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--toast-text);
  background-color: var(--toast-bg);
  border-radius: 100px;
  box-shadow: 0 4px 16px var(--shadow);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-slow), transform var(--transition-slow);
  z-index: 100;
  white-space: nowrap;
}

.toast[hidden] {
  display: block; /* Override hidden to allow transition */
  opacity: 0;
  transform: translateX(-50%) translateY(16px);
  pointer-events: none;
}

.toast.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}


/* --- Sync Status --- */

.sync-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  background-color: var(--accent-soft);
  border-radius: var(--radius-sm);
}

.sync-status[hidden] {
  display: none;
}


/* ============================================================
   RECENT SECTION
   ============================================================ */

.recent-section {
  border-top: 1px solid var(--border);
  padding-bottom: 40px;
}

.recent-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: color var(--transition);
}

.recent-toggle:hover {
  color: var(--text-primary);
}

.recent-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 2px;
}

.recent-toggle-text::after {
  content: ' \203a'; /* Right-pointing single angle quotation */
  display: inline-block;
  transition: transform var(--transition);
  margin-left: 4px;
}

.recent-toggle.open .recent-toggle-text::after {
  transform: rotate(90deg);
}

.recent-count {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

.recent-count:empty {
  display: none;
}

.recent-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-bottom: 8px;
}

.recent-list[hidden] {
  display: none;
}


/* --- Recent Item --- */

.recent-item {
  padding: 12px 14px;
  background-color: var(--bg-secondary);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition);
}

.recent-item:hover {
  background-color: var(--pill-bg);
}

.recent-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 4px;
}

.recent-time {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

.recent-category {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--accent);
  background-color: var(--accent-soft);
  padding: 2px 8px;
  border-radius: 100px;
}

.recent-text {
  font-size: 0.875rem;
  color: var(--text-primary);
  line-height: 1.5;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  word-break: break-word;
}

.recent-delete {
  margin-top: 8px;
  font-size: 0.75rem;
  color: var(--text-muted);
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background-color var(--transition);
}

.recent-delete:hover {
  color: var(--danger);
  background-color: var(--accent-soft);
}

.recent-delete:active {
  color: var(--danger-hover);
}

.recent-delete:focus-visible {
  outline: 2px solid var(--danger);
  outline-offset: 2px;
}


/* ============================================================
   RESPONSIVE
   ============================================================ */

/* Tablets and wider */
@media (min-width: 640px) {
  #capture-screen {
    padding-left: 32px;
    padding-right: 32px;
  }

  .capture-header {
    padding-top: 40px;
  }

  .capture-btn {
    width: auto;
    align-self: flex-start;
    padding: 12px 40px;
  }

  .login-title {
    font-size: 2rem;
  }
}

/* Desktop */
@media (min-width: 1024px) {
  .capture-header {
    padding-top: 56px;
  }
}


/* ============================================================
   ACCESSIBILITY
   ============================================================ */

/* Remove focus outlines for mouse users, keep for keyboard */
:focus:not(:focus-visible) {
  outline: none;
}

/* Reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}


/* ============================================================
   UTILITIES
   ============================================================ */

/* Visually hidden but accessible to screen readers */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}