/* === CSS Variables === */
:root {
  /* Colors — Scouts BSA palette */
  --color-primary: #CE1126;
  --color-primary-hover: #a80d1e;
  --color-secondary: #003F87;
  --color-secondary-hover: #002d63;
  --color-accent: #243E2C;
  --color-bg: #F5F2ED;
  --color-surface: #FFFFFF;
  --color-surface-alt: #D6CEBD;
  --color-text: #1a1a1a;
  --color-text-secondary: #6b6b6b;
  --color-border: #d4d4d4;
  --color-success: #2e7d32;
  --color-error: #CE1126;

  /* Spacing scale (4px base) */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-size-sm: 13px;
  --font-size-base: 15px;
  --font-size-lg: 18px;
  --font-size-xl: 24px;

  /* Borders */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  /* Layout geometry */
  --header-height: 48px;
  --tab-bar-height: 56px;
  --tap-target-min: 44px;

  /* Progress indicators */
  --color-progress-not-started: #9e9e9e;
  --color-progress-in-progress: var(--color-secondary);
  --color-progress-completed: var(--color-success);
  --color-progress-completed-bg: #FFD700;

  /* Carousel */
  --carousel-ring-size: 48px;
  --carousel-ring-stroke: 4px;
  --carousel-gap: var(--space-sm);
  --carousel-padding: var(--space-md);
  --carousel-item-size: 64px;

  /* Achievement component */
  --component-progress-bar-height: 6px;
  --requirement-ring-size: 28px;
  --requirement-ring-stroke: 3px;
  --checkbox-size: 22px;
}

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

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  height: 100vh;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

input, button, textarea, select {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
}

/* === Login Page === */
.login-page {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  min-height: 100dvh;
  padding: var(--space-lg);
  background-color: var(--color-bg);
}

.login-header {
  text-align: center;
  margin-bottom: var(--space-lg);
}

.login-header h1 {
  font-size: var(--font-size-xl);
  color: var(--color-secondary);
  margin: 0 0 var(--space-sm) 0;
}

.login-header p {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  margin: 0;
}

.login-card {
  width: 100%;
  max-width: 360px;
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  box-shadow: 0 1px var(--space-xs) rgba(0, 0, 0, 0.08);
}

.login-error {
  color: var(--color-error);
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-md);
  text-align: center;
}

.form-group {
  margin-bottom: var(--space-md);
}

.form-group label {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xs);
}

.form-group input {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  min-height: var(--tap-target-min);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background-color: var(--color-surface);
  transition: border-color 0.15s;
}

.form-group input:focus {
  outline: none;
  border-color: var(--color-secondary);
  box-shadow: 0 0 0 var(--space-xs) rgba(0, 63, 135, 0.1);
}

.btn-primary {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  min-height: var(--tap-target-min);
  background-color: var(--color-primary);
  color: var(--color-surface);
  border: none;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.15s;
}

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

/* === App Header === */
.app-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background-color: var(--color-secondary);
  color: var(--color-surface);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-md);
  z-index: 100;
}

.app-header h1 {
  font-size: var(--font-size-base);
  font-weight: 600;
  margin: 0;
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.scout-name {
  font-size: var(--font-size-sm);
  opacity: 0.9;
}

.logout-btn {
  background: none;
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: var(--color-surface);
  font-size: var(--font-size-sm);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  cursor: pointer;
  min-height: var(--space-xl);
}

.logout-btn:active {
  background-color: var(--color-secondary-hover);
}

/* === Content Area === */
.content-area {
  flex: 1;
  padding-top: var(--header-height);
  padding-bottom: calc(var(--tab-bar-height) + env(safe-area-inset-bottom, 0px));
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.tab-content {
  display: none;
  flex: 1;
  overflow-y: auto;
  flex-direction: column;
}

.tab-content.active {
  display: flex;
}

.tab-placeholder {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  padding: var(--space-xl);
  text-align: center;
  gap: var(--space-md);
}

.tab-placeholder-icon {
  font-size: var(--space-xl);
  opacity: 0.5;
}

.tab-placeholder-text {
  font-size: var(--font-size-base);
}

/* === Tab Bar === */
.tab-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: calc(var(--tab-bar-height) + env(safe-area-inset-bottom, 0px));
  padding-bottom: env(safe-area-inset-bottom, 0px);
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  display: flex;
  z-index: 100;
}

.tab-btn {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  background: none;
  border: none;
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  cursor: pointer;
  min-height: var(--tap-target-min);
  padding: var(--space-xs) 0;
  transition: color 0.15s;
}

.tab-btn.active {
  color: var(--color-primary);
}

.tab-btn svg {
  width: var(--space-lg);
  height: var(--space-lg);
}

/* === Chat Tab === */
.chat-view {
  display: none;
  flex-direction: column;
  flex: 1;
  overflow: hidden;
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
}

.chat-view.active {
  display: flex;
}

#tab-content-chat {
  position: relative;
}

/* Slide transition */
#chat-conversation-view {
  transform: translateX(100%);
  transition: transform 250ms ease;
  z-index: 2;
  background-color: var(--color-bg);
}

#chat-conversation-view.active {
  transform: translateX(0);
}

#chat-list-view {
  z-index: 1;
  padding: var(--space-md);
  overflow-y: auto;
}

/* New conversation button */
.new-conversation-btn {
  width: 100%;
  min-height: var(--tap-target-min);
  background-color: var(--color-primary);
  color: var(--color-surface);
  border: none;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  padding: var(--space-sm) var(--space-md);
  margin-bottom: var(--space-md);
  transition: background-color 0.15s;
}

.new-conversation-btn:active {
  background-color: var(--color-primary-hover);
}

/* Conversation list */
.conversation-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.conversation-item {
  display: flex;
  align-items: center;
  min-height: var(--tap-target-min);
  padding: var(--space-sm) var(--space-md);
  background-color: var(--color-surface);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: var(--font-size-base);
  color: var(--color-text);
  border: none;
  width: 100%;
  text-align: left;
  transition: background-color 0.1s;
}

.conversation-item:active {
  background-color: var(--color-surface-alt);
}

.chat-empty-state {
  text-align: center;
  color: var(--color-text-secondary);
  padding: var(--space-xl);
  font-size: var(--font-size-base);
}

/* Chat top bar */
.chat-topbar {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--color-border);
  background-color: var(--color-surface);
  min-height: var(--tap-target-min);
  flex-shrink: 0;
}

.chat-back-btn {
  background: none;
  border: none;
  color: var(--color-secondary);
  cursor: pointer;
  padding: var(--space-xs);
  min-width: var(--tap-target-min);
  min-height: var(--tap-target-min);
  display: flex;
  align-items: center;
  justify-content: center;
}

.chat-title {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text);
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Chat messages area */
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

/* Message bubbles */
.message {
  max-width: 85%;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-lg);
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.message-user {
  align-self: flex-end;
  background-color: var(--color-surface-alt);
  white-space: pre-wrap;
}

.message-assistant {
  align-self: flex-start;
  background-color: var(--color-surface);
}

.message-assistant p:first-child {
  margin-top: 0;
}

.message-assistant p:last-child {
  margin-bottom: 0;
}

.message-assistant table {
  border-collapse: collapse;
  width: 100%;
  margin: var(--space-sm) 0;
  font-size: var(--font-size-sm);
}

.message-assistant th,
.message-assistant td {
  border: 1px solid var(--color-border);
  padding: var(--space-xs) var(--space-sm);
  text-align: left;
}

.message-assistant th {
  background-color: var(--color-bg);
  font-weight: 600;
}

.message-assistant ul,
.message-assistant ol {
  padding-left: var(--space-lg);
  margin: var(--space-sm) 0;
}

.message-assistant code {
  background-color: var(--color-bg);
  padding: 2px var(--space-xs);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
}

.message-assistant pre {
  background-color: var(--color-bg);
  padding: var(--space-sm);
  border-radius: var(--radius-sm);
  overflow-x: auto;
}

.message-assistant pre code {
  background: none;
  padding: 0;
}

.message-system {
  align-self: center;
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  text-align: center;
  max-width: 100%;
  padding: var(--space-xs) var(--space-sm);
}

.message-system .retry-link {
  color: var(--color-secondary);
  cursor: pointer;
  text-decoration: underline;
}

/* Tool indicator */
.tool-indicator {
  align-self: flex-start;
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  padding: var(--space-sm) var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.tool-indicator .dots {
  display: inline-flex;
  gap: 3px;
}

.tool-indicator .dots span {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background-color: var(--color-text-secondary);
  animation: pulse-dot 1.2s ease-in-out infinite;
}

.tool-indicator .dots span:nth-child(2) {
  animation-delay: 0.2s;
}

.tool-indicator .dots span:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes pulse-dot {
  0%, 80%, 100% { opacity: 0.3; }
  40% { opacity: 1; }
}

/* Chat input area */
.chat-input-area {
  display: flex;
  align-items: flex-end;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  border-top: 1px solid var(--color-border);
  background-color: var(--color-surface);
  flex-shrink: 0;
}

.chat-input {
  flex: 1;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-base);
  font-family: var(--font-family);
  color: var(--color-text);
  background-color: var(--color-surface);
  resize: none;
  line-height: 1.4;
  max-height: calc(var(--font-size-base) * 1.4 * 4 + var(--space-sm) * 2);
  overflow-y: auto;
  min-height: var(--tap-target-min);
}

.chat-input:focus {
  outline: none;
  border-color: var(--color-secondary);
}

.chat-input:disabled {
  opacity: 0.5;
  background-color: var(--color-bg);
}

.chat-send-btn {
  width: var(--tap-target-min);
  height: var(--tap-target-min);
  min-width: var(--tap-target-min);
  border: none;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-surface);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.15s, opacity 0.15s;
}

.chat-send-btn:active {
  background-color: var(--color-primary-hover);
}

.chat-send-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* === Tracker Tab === */

#tab-content-tracker {
  position: relative;
  padding: 0;
}

.tracker-loading,
.tracker-error,
.tracker-empty {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl);
  text-align: center;
  gap: var(--space-md);
  color: var(--color-text-secondary);
}

.tracker-empty-title {
  font-size: var(--font-size-lg);
  color: var(--color-text);
  font-weight: 600;
}

.tracker-empty-subtitle {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  max-width: 320px;
}

.tracker-empty-cta,
.tracker-error-retry {
  margin-top: var(--space-md);
  padding: var(--space-sm) var(--space-lg);
  min-height: var(--tap-target-min);
  background-color: var(--color-primary);
  color: var(--color-surface);
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
}

.tracker-error-retry {
  background-color: var(--color-secondary);
}

.tracker-spinner {
  width: var(--space-xl);
  height: var(--space-xl);
  border: 3px solid var(--color-border);
  border-top-color: var(--color-secondary);
  border-radius: 50%;
  animation: tracker-spin 0.8s linear infinite;
}

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

/* --- Sticky carousel container --- */
.tracker-sticky {
  position: sticky;
  top: 0;
  z-index: 10;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.04);
}

.tracker-carousel {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: var(--carousel-gap);
  padding: var(--space-sm) var(--carousel-padding);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.tracker-carousel::-webkit-scrollbar {
  display: none;
}

.tracker-carousel.is-hidden {
  display: none;
}

.tracker-carousel-item {
  flex: 0 0 auto;
  scroll-snap-align: start;
  width: var(--carousel-item-size);
  height: var(--carousel-item-size);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  border-radius: 50%;
}

.tracker-carousel-item.is-completed {
  background-color: var(--color-progress-completed-bg);
}

.tracker-carousel-item .ring-emoji {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-lg);
  pointer-events: none;
}

.progress-ring {
  display: block;
}

/* --- Scrollable content --- */
.tracker-scroll {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  padding: var(--space-md);
}

/* --- Achievement components --- */
.tracker-component {
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.tracker-component-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  font-size: var(--font-size-base);
  font-weight: 600;
}

.tracker-component-name {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tracker-component-icon {
  font-size: var(--font-size-xl);
}

.tracker-component-fraction {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  font-weight: 500;
  white-space: nowrap;
}

.tracker-progress-bar {
  width: 100%;
  height: var(--component-progress-bar-height);
  background-color: var(--color-progress-not-started);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.tracker-progress-bar-fill {
  height: 100%;
  background-color: var(--color-progress-in-progress);
  border-radius: var(--radius-sm);
  transition: width 0.25s ease;
}

.tracker-component.is-completed .tracker-progress-bar-fill {
  background-color: var(--color-progress-completed);
}

/* --- Requirement rows --- */
.tracker-requirements {
  display: flex;
  flex-direction: column;
  margin-top: var(--space-sm);
}

.tracker-requirement {
  display: flex;
  flex-direction: column;
}

.tracker-requirement-row {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  min-height: var(--tap-target-min);
  padding: var(--space-xs) 0;
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  cursor: pointer;
  font-size: var(--font-size-base);
  color: var(--color-text);
}

.tracker-requirement-ring {
  position: relative;
  width: var(--requirement-ring-size);
  height: var(--requirement-ring-size);
  flex: 0 0 auto;
}

.tracker-requirement-ring-number {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text);
}

.tracker-requirement-name {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tracker-requirement-fraction {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  font-weight: 500;
  white-space: nowrap;
}

.tracker-activities {
  display: none;
  flex-direction: column;
  padding-left: calc(var(--requirement-ring-size) + var(--space-sm));
}

.tracker-requirement.is-expanded > .tracker-activities {
  display: flex;
}

.tracker-activity {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  min-height: var(--tap-target-min);
  font-size: var(--font-size-base);
  cursor: pointer;
  user-select: none;
}

.tracker-activity-checkbox {
  width: var(--checkbox-size);
  height: var(--checkbox-size);
  min-width: var(--checkbox-size);
  appearance: none;
  -webkit-appearance: none;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: var(--color-surface);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  flex: 0 0 auto;
}

.tracker-activity-checkbox:checked {
  background-color: var(--color-progress-completed);
  border-color: var(--color-progress-completed);
}

.tracker-activity-checkbox:checked::after {
  content: '✓';
  color: var(--color-surface);
  font-size: var(--font-size-sm);
  font-weight: 700;
}

.tracker-activity.is-completed .tracker-activity-name {
  color: var(--color-text-secondary);
  text-decoration: line-through;
}

.tracker-activity.has-error .tracker-activity-checkbox {
  border-color: var(--color-error);
}

.tracker-activity-checkbox:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.tracker-activity-name {
  flex: 1;
  min-width: 0;
}

.tracker-completed-toggle,
.tracker-section-toggle {
  margin-top: var(--space-sm);
  padding: var(--space-sm);
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  cursor: pointer;
  border-top: 1px solid var(--color-border);
}

.tracker-completed-list {
  display: none;
  flex-direction: column;
}

.tracker-requirement.is-completed-section .tracker-completed-list {
  display: flex;
}

.tracker-completed-list.is-expanded {
  display: flex;
}

/* --- Completed section --- */
.tracker-completed-section {
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
}

.tracker-completed-section.is-empty {
  display: none;
}

.tracker-section-toggle {
  border-top: none;
  padding: var(--space-md);
  font-size: var(--font-size-base);
  color: var(--color-text);
  font-weight: 600;
}

.tracker-completed-body {
  display: none;
  flex-direction: column;
  gap: var(--space-md);
  padding: 0 var(--space-md) var(--space-md);
}

.tracker-completed-section.is-expanded .tracker-completed-body {
  display: flex;
}

.tracker-subhead {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: var(--space-sm);
}

.tracker-empty-list {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  font-style: italic;
}