/**
 * Thunderbird Mobile - Material Design 3 Stylesheet
 */

:root {
  --md-sys-color-primary: #0b57d0;
  --md-sys-color-on-primary: #ffffff;
  --md-sys-color-primary-container: #d3e3fd;
  --md-sys-color-on-primary-container: #041e49;
  
  --md-sys-color-secondary: #00639b;
  --md-sys-color-surface: #f8fafd;
  --md-sys-color-surface-container: #ffffff;
  --md-sys-color-surface-container-high: #eaeef6;
  --md-sys-color-surface-variant: #e1e3e8;
  --md-sys-color-on-surface: #1b1b1f;
  --md-sys-color-on-surface-variant: #44474f;
  --md-sys-color-outline: #74777f;
  --md-sys-color-outline-variant: #c4c7cf;

  --md-sys-color-error: #ba1a1a;
  --md-sys-color-error-container: #ffdad6;
  --md-sys-color-on-error: #ffffff;

  --md-sys-color-unread-bg: #e8f0fe;
  --md-sys-color-border: #e0e3e7;
  --md-sys-color-star: #e37400;

  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  --shadow-1: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-2: 0 4px 12px rgba(0, 0, 0, 0.12);
  --shadow-3: 0 8px 24px rgba(0, 0, 0, 0.16);
  --transition: 0.2s cubic-bezier(0.2, 0, 0, 1);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --md-sys-color-primary: #a8c7fa;
    --md-sys-color-on-primary: #041e49;
    --md-sys-color-primary-container: #0842a0;
    --md-sys-color-on-primary-container: #d3e3fd;

    --md-sys-color-surface: #111318;
    --md-sys-color-surface-container: #1e1f25;
    --md-sys-color-surface-container-high: #282a30;
    --md-sys-color-surface-variant: #44474f;
    --md-sys-color-on-surface: #e2e2e6;
    --md-sys-color-on-surface-variant: #c4c7cf;
    --md-sys-color-outline: #8e9199;
    --md-sys-color-outline-variant: #44474f;

    --md-sys-color-unread-bg: #1c2b45;
    --md-sys-color-border: #2a2c34;
    --md-sys-color-star: #f9ab00;
  }
}

[data-theme="dark"] {
  --md-sys-color-primary: #a8c7fa;
  --md-sys-color-on-primary: #041e49;
  --md-sys-color-primary-container: #0842a0;
  --md-sys-color-on-primary-container: #d3e3fd;

  --md-sys-color-surface: #111318;
  --md-sys-color-surface-container: #1e1f25;
  --md-sys-color-surface-container-high: #282a30;
  --md-sys-color-surface-variant: #44474f;
  --md-sys-color-on-surface: #e2e2e6;
  --md-sys-color-on-surface-variant: #c4c7cf;
  --md-sys-color-outline: #8e9199;
  --md-sys-color-outline-variant: #44474f;

  --md-sys-color-unread-bg: #1c2b45;
  --md-sys-color-border: #2a2c34;
  --md-sys-color-star: #f9ab00;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-family);
  background-color: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface);
  overflow-x: hidden;
  height: 100vh;
  height: 100dvh;
  display: flex;
  flex-direction: column;
}

/* App Container */
.app-container {
  display: flex;
  height: 100%;
  width: 100%;
  position: relative;
  overflow: hidden;
}

/* Header & Top Bar */
.top-app-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 16px;
  background-color: var(--md-sys-color-surface-container);
  border-bottom: 1px solid var(--md-sys-color-border);
  position: sticky;
  top: 0;
  z-index: 10;
  min-height: 56px;
}

.icon-btn {
  background: none;
  border: none;
  border-radius: var(--radius-full);
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--md-sys-color-on-surface);
  transition: background-color var(--transition);
  flex-shrink: 0;
}

.icon-btn:hover, .icon-btn:active {
  background-color: var(--md-sys-color-surface-container-high);
}

.search-box {
  flex: 1;
  display: flex;
  align-items: center;
  background-color: var(--md-sys-color-surface-container-high);
  border-radius: var(--radius-full);
  padding: 4px 14px;
  gap: 8px;
}

.search-box input {
  border: none;
  background: none;
  outline: none;
  width: 100%;
  font-size: 15px;
  color: var(--md-sys-color-on-surface);
}

.search-box input::placeholder {
  color: var(--md-sys-color-on-surface-variant);
}

/* Filter Chips Bar */
.filter-bar {
  display: flex;
  gap: 8px;
  padding: 8px 16px;
  overflow-x: auto;
  scrollbar-width: none;
  background-color: var(--md-sys-color-surface);
  border-bottom: 1px solid var(--md-sys-color-border);
}

.filter-bar::-webkit-scrollbar {
  display: none;
}

.chip {
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--md-sys-color-outline-variant);
  background-color: var(--md-sys-color-surface-container);
  color: var(--md-sys-color-on-surface-variant);
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
  cursor: pointer;
  transition: all var(--transition);
}

.chip.active {
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  border-color: transparent;
}

/* Drawer / Sidebar */
.drawer-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.4);
  z-index: 90;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}

.drawer-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}

.drawer {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  width: 320px;
  max-width: 85vw;
  background-color: var(--md-sys-color-surface-container);
  z-index: 100;
  transform: translateX(-100%);
  transition: transform 0.25s cubic-bezier(0, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-3);
}

.drawer.open {
  transform: translateX(0);
}

.drawer-header {
  padding: 20px 20px 14px 20px;
  border-bottom: 1px solid var(--md-sys-color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.drawer-title {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 19px;
  font-weight: 600;
  color: var(--md-sys-color-primary);
}

.drawer-content {
  flex: 1;
  overflow-y: auto;
  padding: 12px 8px;
}

.drawer-footer {
  padding: 12px 16px;
  border-top: 1px solid var(--md-sys-color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: var(--md-sys-color-on-surface-variant);
}

/* Account & Folder Items in Drawer */
.account-group {
  margin-bottom: 8px;
}

.account-header {
  display: flex;
  align-items: center;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-weight: 600;
  font-size: 14px;
  color: var(--md-sys-color-on-surface);
  user-select: none;
  transition: background-color var(--transition);
}

.account-header:hover {
  background-color: var(--md-sys-color-surface-container-high);
}

.account-header .chevron {
  margin-right: 8px;
  font-size: 12px;
  transition: transform var(--transition);
}

.account-header.collapsed .chevron {
  transform: rotate(-90deg);
}

.account-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.folder-list {
  padding-left: 20px;
}

.account-header.collapsed + .folder-list {
  display: none;
}

.folder-item {
  display: flex;
  align-items: center;
  padding: 9px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 2px;
  cursor: pointer;
  font-size: 13.5px;
  color: var(--md-sys-color-on-surface-variant);
  transition: all var(--transition);
}

.folder-item:hover {
  background-color: var(--md-sys-color-surface-container-high);
}

.folder-item.active {
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  font-weight: 600;
}

.folder-icon {
  margin-right: 12px;
  font-size: 16px;
  display: flex;
  align-items: center;
}

.folder-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.badge {
  background-color: var(--md-sys-color-surface-variant);
  color: var(--md-sys-color-on-surface-variant);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 600;
  margin-left: 6px;
}

.badge.unread {
  background-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
}

.badge.large {
  font-size: 11px;
}

/* Main View: Message List */
.main-view {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  position: relative;
}

.message-list {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.message-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--md-sys-color-border);
  background-color: var(--md-sys-color-surface-container);
  cursor: pointer;
  position: relative;
  transition: background-color var(--transition);
}

.message-item:hover {
  background-color: var(--md-sys-color-surface-container-high);
}

.message-item.unread {
  background-color: var(--md-sys-color-unread-bg);
}

.avatar {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-full);
  background-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 16px;
  flex-shrink: 0;
  text-transform: uppercase;
}

.message-content {
  flex: 1;
  min-width: 0;
}

.message-header-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 3px;
}

.sender-name {
  font-size: 14.5px;
  font-weight: 500;
  color: var(--md-sys-color-on-surface);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 68%;
}

.message-item.unread .sender-name {
  font-weight: 700;
}

.message-time {
  font-size: 12px;
  color: var(--md-sys-color-on-surface-variant);
  white-space: nowrap;
}

.message-item.unread .message-time {
  color: var(--md-sys-color-primary);
  font-weight: 600;
}

.message-subject {
  font-size: 14px;
  color: var(--md-sys-color-on-surface);
  margin-bottom: 4px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.message-item.unread .message-subject {
  font-weight: 700;
}

.message-preview {
  font-size: 13px;
  color: var(--md-sys-color-on-surface-variant);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.35;
}

.message-footer-tags {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 6px;
}

.account-tag {
  font-size: 11px;
  padding: 1px 7px;
  border-radius: var(--radius-xs);
  background-color: var(--md-sys-color-surface-container-high);
  color: var(--md-sys-color-on-surface-variant);
  font-weight: 500;
  display: inline-block;
}

.star-btn {
  background: none;
  border: none;
  font-size: 18px;
  color: var(--md-sys-color-outline-variant);
  cursor: pointer;
  padding: 4px;
  margin-left: auto;
  line-height: 1;
}

.star-btn.starred {
  color: var(--md-sys-color-star);
}

/* Empty State / Loading State */
.state-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 60vh;
  padding: 24px;
  text-align: center;
  color: var(--md-sys-color-on-surface-variant);
}

.state-icon {
  font-size: 48px;
  margin-bottom: 16px;
  opacity: 0.8;
}

.state-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--md-sys-color-on-surface);
}

.state-desc {
  font-size: 14px;
  max-width: 320px;
  line-height: 1.4;
}

.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--md-sys-color-surface-variant);
  border-top-color: var(--md-sys-color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-bottom: 16px;
}

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

/* Floating Action Button (FAB) */
.fab {
  position: fixed;
  bottom: 24px;
  right: 20px;
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  border: none;
  border-radius: var(--radius-lg);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
  font-weight: 600;
  box-shadow: var(--shadow-2);
  cursor: pointer;
  z-index: 50;
  transition: all var(--transition);
}

.fab:hover, .fab:active {
  box-shadow: var(--shadow-3);
  transform: translateY(-2px);
}

/* Full Screen Email Reader View */
.detail-view {
  position: fixed;
  inset: 0;
  background-color: var(--md-sys-color-surface-container);
  z-index: 60;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.25s cubic-bezier(0, 0, 0.2, 1);
}

.detail-view.open {
  transform: translateX(0);
}

.detail-app-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  border-bottom: 1px solid var(--md-sys-color-border);
  background-color: var(--md-sys-color-surface-container);
  min-height: 56px;
}

.detail-actions {
  display: flex;
  align-items: center;
  gap: 4px;
}

.detail-body {
  flex: 1;
  overflow-y: auto;
  padding: 16px 20px;
}

.detail-subject {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 16px;
  line-height: 1.3;
  color: var(--md-sys-color-on-surface);
}

.sender-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--md-sys-color-border);
  margin-bottom: 16px;
}

.sender-info {
  flex: 1;
  min-width: 0;
}

.sender-main {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
}

.sender-name-full {
  font-size: 15px;
  font-weight: 600;
  color: var(--md-sys-color-on-surface);
}

.sender-email {
  font-size: 13px;
  color: var(--md-sys-color-on-surface-variant);
  margin-top: 2px;
}

.recipient-line {
  font-size: 12px;
  color: var(--md-sys-color-on-surface-variant);
  margin-top: 2px;
}

.email-content-box {
  padding: 12px 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--md-sys-color-on-surface);
  word-break: break-word;
}

.email-content-box iframe {
  width: 100%;
  border: none;
  min-height: 400px;
  background-color: #ffffff;
  border-radius: var(--radius-sm);
}

/* Attachments */
.attachments-section {
  margin-top: 20px;
  padding: 14px;
  background-color: var(--md-sys-color-surface-container-high);
  border-radius: var(--radius-md);
}

.attachments-title {
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--md-sys-color-on-surface-variant);
}

.attachment-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--md-sys-color-surface-container);
  border: 1px solid var(--md-sys-color-border);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  margin-right: 8px;
  margin-bottom: 8px;
  font-size: 13px;
}

/* Detail Bottom Action Bar */
.detail-bottom-bar {
  display: flex;
  gap: 12px;
  padding: 12px 20px;
  border-top: 1px solid var(--md-sys-color-border);
  background-color: var(--md-sys-color-surface-container);
}

.action-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px;
  border-radius: var(--radius-full);
  border: 1px solid var(--md-sys-color-outline-variant);
  background-color: var(--md-sys-color-surface-container);
  color: var(--md-sys-color-on-surface);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

.action-btn.primary {
  background-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  border-color: transparent;
}

/* Compose Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 120;
  display: flex;
  align-items: flex-end;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-card {
  width: 100%;
  max-width: 640px;
  margin: 0 auto;
  background-color: var(--md-sys-color-surface-container);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  transform: translateY(100%);
  transition: transform 0.25s cubic-bezier(0, 0, 0.2, 1);
  box-shadow: var(--shadow-3);
}

.modal-overlay.open .modal-card {
  transform: translateY(0);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  border-bottom: 1px solid var(--md-sys-color-border);
}

.modal-title {
  font-size: 17px;
  font-weight: 600;
}

.modal-body {
  padding: 16px 20px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.form-group {
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--md-sys-color-border);
  padding: 6px 0;
}

.form-group label {
  width: 60px;
  font-size: 13px;
  color: var(--md-sys-color-on-surface-variant);
  font-weight: 500;
}

.form-group input, .form-group select {
  flex: 1;
  border: none;
  background: none;
  outline: none;
  font-size: 14.5px;
  color: var(--md-sys-color-on-surface);
  font-family: inherit;
}

.body-editor {
  min-height: 180px;
  border: none;
  outline: none;
  resize: vertical;
  background: none;
  font-size: 15px;
  line-height: 1.5;
  color: var(--md-sys-color-on-surface);
  font-family: inherit;
  padding: 8px 0;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  padding: 12px 20px;
  border-top: 1px solid var(--md-sys-color-border);
  gap: 10px;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 84px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 150;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast {
  background-color: var(--md-sys-color-on-surface);
  color: var(--md-sys-color-surface);
  padding: 10px 18px;
  border-radius: var(--radius-full);
  font-size: 13.5px;
  box-shadow: var(--shadow-2);
  display: flex;
  align-items: center;
  gap: 8px;
  animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}