/* ==============================================================================
   VMAILA ENTERPRISE SECURE EMAIL PLATFORM - DESIGN SYSTEM (WHITE / LIGHT PALETTE)
   ============================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  /* Surface & Background Colors - Pure White & Crisp Light Palette */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-card: #ffffff;
  --bg-card-hover: #f1f5f9;
  --bg-glass: rgba(255, 255, 255, 0.95);

  /* Borders & Dividers */
  --border-subtle: #e2e8f0;
  --border-medium: #cbd5e1;
  --border-focus: #4f46e5;

  /* Typography */
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Accent & Security Colors */
  --primary: #4f46e5;
  --primary-glow: rgba(79, 70, 229, 0.2);
  --primary-hover: #4338ca;
  --e2ee: #059669;
  --e2ee-glow: rgba(16, 185, 129, 0.15);
  --smime: #2563eb;
  --smime-glow: rgba(37, 99, 235, 0.15);
  --pgp: #d97706;
  --pgp-glow: rgba(217, 119, 6, 0.15);
  --portal: #db2777;
  --portal-glow: rgba(219, 39, 119, 0.15);
  --danger: #dc2626;

  /* Geometry & Shadows */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-subtle: 0 2px 10px rgba(0, 0, 0, 0.05);
  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-glow: 0 0 20px rgba(79, 70, 229, 0.15);
}

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

body {
  font-family: var(--font-sans);
  background-color: #ffffff;
  color: var(--text-primary);
  height: 100vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

/* App Header */
.vmaila-header {
  height: 60px;
  background: #ffffff;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  z-index: 100;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-icon {
  width: 34px;
  height: 34px;
  background: linear-gradient(135deg, #4f46e5, #06b6d4);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 800;
  font-size: 18px;
  box-shadow: 0 2px 10px rgba(79, 70, 229, 0.3);
}

.brand-name {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: #0f172a;
}

.brand-tagline {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  background: rgba(79, 70, 229, 0.08);
  color: #4f46e5;
  padding: 2px 8px;
  border-radius: 20px;
  font-weight: 700;
  border: 1px solid rgba(99, 102, 241, 0.2);
}

.header-center {
  flex: 1;
  max-width: 580px;
  margin: 0 24px;
}

.search-bar {
  width: 100%;
  display: flex;
  align-items: center;
  background: #f8fafc;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 8px 16px;
  gap: 10px;
  transition: all 0.2s ease;
}

.search-bar:focus-within {
  background: #ffffff;
  border-color: #6366f1;
  box-shadow: 0 0 12px rgba(99, 102, 241, 0.15);
}

.search-bar input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  width: 100%;
  font-size: 13px;
  font-family: var(--font-sans);
}

.search-bar input::placeholder {
  color: var(--text-muted);
}

.btn-search-ai {
  background: transparent;
  border: none;
  cursor: pointer;
  font-size: 1rem;
  color: #6366f1;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.btn-ai-assistant {
  display: flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(168, 85, 247, 0.1));
  border: 1px solid rgba(99, 102, 241, 0.3);
  color: #4f46e5;
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-ai-assistant:hover {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(168, 85, 247, 0.2));
}

.btn-admin-link {
  display: flex;
  align-items: center;
  gap: 8px;
  background: #f1f5f9;
  border: 1px solid var(--border-medium);
  color: #334155;
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 700;
  transition: all 0.2s;
}

.btn-admin-link:hover {
  background: #e2e8f0;
  color: #0f172a;
}

.btn-icon-setting {
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  width: 34px;
  height: 34px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.btn-icon-setting:hover {
  background: #f8fafc;
  color: var(--text-primary);
}

.security-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.25);
  padding: 5px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  color: #059669;
}

.security-dot {
  width: 8px;
  height: 8px;
  background: #10b981;
  border-radius: 50%;
  box-shadow: 0 0 6px #10b981;
}

.account-selector {
  display: flex;
  align-items: center;
  gap: 8px;
  background: #f8fafc;
  padding: 4px 10px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  cursor: pointer;
}

.account-avatar {
  width: 26px;
  height: 26px;
  background: #4f46e5;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  color: #ffffff;
}

/* ─── Outlook-style Left App Rail ─────────────────────────────────────────── */
.app-wrapper {
  display: flex;
  height: calc(100vh - 60px);
  width: 100vw;
  background: #ffffff;
  overflow: hidden;
}

.app-rail {
  width: 58px;
  background: #ffffff;
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 12px 0;
  gap: 8px;
  z-index: 50;
  flex-shrink: 0;
}

.rail-item {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.15s ease;
  font-size: 1.15rem;
  position: relative;
}

.rail-item:hover {
  background: #f1f5f9;
  color: var(--text-primary);
}

.rail-item.active {
  background: rgba(79, 70, 229, 0.12);
  color: #4f46e5;
  border-left: 3px solid #4f46e5;
}

.rail-label {
  font-size: 8px;
  font-weight: 700;
  margin-top: 2px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.rail-divider {
  width: 28px;
  height: 1px;
  background: var(--border-subtle);
  margin: 6px 0;
}

.rail-bottom {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* ─── App Views Workspace ─────────────────────────────────────────────────── */
.app-view {
  display: none;
  flex: 1;
  height: 100%;
  background: #ffffff;
  overflow: hidden;
}

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

/* ─── Pane 1: Sidebar (Folders) ───────────────────────────────────────────── */
.sidebar {
  width: 240px;
  background: #f8fafc;
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  padding: 16px 12px;
  gap: 18px;
}

.btn-compose {
  background: linear-gradient(135deg, #4f46e5, #6366f1);
  color: white;
  border: none;
  padding: 12px 18px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(79, 70, 229, 0.25);
  transition: all 0.2s ease;
}

.btn-compose:hover {
  background: linear-gradient(135deg, #4338ca, #4f46e5);
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.35);
}

.folder-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.folder-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  cursor: pointer;
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 600;
  transition: all 0.15s ease;
}

.folder-item:hover {
  background: #edf2f7;
  color: var(--text-primary);
}

.folder-item.active {
  background: rgba(79, 70, 229, 0.1);
  color: #4f46e5;
  font-weight: 700;
  border-left: 3px solid #4f46e5;
}

.folder-icon-text {
  display: flex;
  align-items: center;
  gap: 10px;
}

.folder-badge {
  background: #e2e8f0;
  color: var(--text-primary);
  font-size: 11px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 10px;
}

.folder-item.active .folder-badge {
  background: #4f46e5;
  color: white;
}

.sidebar-bottom {
  margin-top: auto;
  border-top: 1px solid var(--border-subtle);
  padding-top: 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.btn-sidebar-tool {
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 9px 12px;
  border-radius: var(--radius-md);
  font-size: 12px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-sidebar-tool:hover {
  background: #f1f5f9;
  color: var(--text-primary);
}

/* ─── Pane 2: Message List ─────────────────────────────────────────────────── */
.message-list-pane {
  width: 380px;
  background: #ffffff;
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.ai-categories-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: #f8fafc;
  border-bottom: 1px solid var(--border-subtle);
  overflow-x: auto;
}

.category-pill {
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 0.72rem;
  font-weight: 600;
  background: #edf2f7;
  color: var(--text-secondary);
  border: none;
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.category-pill:hover, .category-pill.active {
  background: #4f46e5;
  color: #fff;
}

.message-list-header {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #ffffff;
}

.pane-title {
  font-size: 16px;
  font-weight: 800;
  color: var(--text-primary);
}

.messages-scroll {
  flex: 1;
  overflow-y: auto;
  background: #ffffff;
}

.message-card {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-subtle);
  cursor: pointer;
  transition: background 0.15s ease;
  background: #ffffff;
}

.message-card:hover {
  background: #f8fafc;
}

.message-card.active {
  background: rgba(79, 70, 229, 0.08);
  border-left: 3px solid #4f46e5;
}

.message-card.unread .msg-sender,
.message-card.unread .msg-subject {
  font-weight: 800;
  color: #0f172a;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 4px;
}

.msg-sender {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
}

.msg-date {
  font-size: 11px;
  color: var(--text-muted);
}

.msg-subject {
  font-size: 13px;
  color: var(--text-primary);
  margin-bottom: 6px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.msg-snippet {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 8px;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.crypto-badge {
  font-size: 10px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.badge-e2ee { background: rgba(16, 185, 129, 0.12); color: #059669; border: 1px solid rgba(16, 185, 129, 0.25); }
.badge-smime { background: rgba(59, 130, 246, 0.12); color: #2563eb; border: 1px solid rgba(59, 130, 246, 0.25); }
.badge-pgp { background: rgba(245, 158, 11, 0.12); color: #d97706; border: 1px solid rgba(245, 158, 11, 0.25); }
.badge-storage { background: rgba(99, 102, 241, 0.12); color: #4f46e5; border: 1px solid rgba(99, 102, 241, 0.25); }
.badge-portal { background: rgba(236, 72, 153, 0.12); color: #db2777; border: 1px solid rgba(236, 72, 153, 0.25); }

/* ─── Pane 3: Reading Pane ─────────────────────────────────────────────────── */
.message-detail-pane {
  flex: 1;
  background: #ffffff;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.detail-header-bar {
  padding: 16px 24px;
  border-bottom: 1px solid var(--border-subtle);
  background: #f8fafc;
  position: sticky;
  top: 0;
  z-index: 5;
}

.detail-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.action-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-action {
  background: #ffffff;
  border: 1px solid var(--border-medium);
  color: var(--text-primary);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.15s ease;
}

.btn-action:hover {
  background: #f1f5f9;
}

.detail-subject {
  font-size: 20px;
  font-weight: 800;
  color: #0f172a;
  line-height: 1.3;
  margin-bottom: 12px;
}

/* Security Ribbon */
.security-banner {
  background: #f1f5f9;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.security-banner-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.shield-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
}

.shield-storage { background: rgba(99, 102, 241, 0.12); color: #4f46e5; }
.shield-e2ee { background: rgba(16, 185, 129, 0.12); color: #059669; }
.shield-smime { background: rgba(59, 130, 246, 0.12); color: #2563eb; }
.shield-pgp { background: rgba(245, 158, 11, 0.12); color: #d97706; }
.shield-portal { background: rgba(236, 72, 153, 0.12); color: #db2777; }

.security-banner-title {
  font-size: 13px;
  font-weight: 700;
  color: #0f172a;
}

.security-banner-desc {
  font-size: 11px;
  color: var(--text-secondary);
}

.sender-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 10px;
}

.sender-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.avatar-large {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, #4f46e5, #06b6d4);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 16px;
}

.sender-name {
  font-size: 14px;
  font-weight: 700;
  color: #0f172a;
}

.sender-email-addr {
  font-size: 12px;
  color: var(--text-secondary);
}

.detail-body-container {
  padding: 24px;
  background: #ffffff;
}

.detail-body-content {
  font-size: 14px;
  line-height: 1.6;
  color: #0f172a;
  margin-bottom: 24px;
}

/* Attachments */
.attachments-section {
  border-top: 1px solid var(--border-subtle);
  padding-top: 20px;
}

.attachments-title {
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 12px;
  color: #0f172a;
}

.attachment-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 16px;
}

.attachment-card {
  display: flex;
  align-items: center;
  gap: 10px;
  background: #f8fafc;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.attachment-card:hover {
  background: #edf2f7;
  border-color: #4f46e5;
}

.att-info {
  display: flex;
  flex-direction: column;
}

.att-name {
  font-size: 12px;
  font-weight: 700;
  color: #0f172a;
}

.att-meta {
  font-size: 11px;
  color: var(--text-secondary);
}

/* OCR Drawer */
.ocr-drawer {
  background: #f8fafc;
  border: 1px solid rgba(79, 70, 229, 0.2);
  border-radius: var(--radius-md);
  padding: 16px;
}

.ocr-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.ocr-tag {
  font-size: 12px;
  font-weight: 700;
  color: #4f46e5;
}

.ocr-text-box {
  background: #ffffff;
  border: 1px solid var(--border-medium);
  border-radius: 6px;
  padding: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: #1e293b;
  max-height: 200px;
  overflow-y: auto;
  white-space: pre-wrap;
}

/* ─── Modals ───────────────────────────────────────────────────────────────── */
.modal-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15, 23, 42, 0.4);
  backdrop-filter: blur(4px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

.modal-overlay.open {
  display: flex;
}

.modal-container {
  background: #ffffff;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  width: 680px;
  max-width: 90vw;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
  overflow: hidden;
}

.modal-header {
  padding: 18px 24px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #f8fafc;
}

.modal-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 15px;
  color: #0f172a;
}

.modal-close {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 20px;
  cursor: pointer;
}

.modal-close:hover {
  color: #0f172a;
}

.modal-body {
  padding: 24px;
  max-height: 70vh;
  overflow-y: auto;
  background: #ffffff;
}

.form-group {
  margin-bottom: 18px;
}

.form-label {
  display: block;
  font-size: 12px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.form-input, .form-textarea, .form-select {
  width: 100%;
  background: #ffffff;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  color: #0f172a;
  font-size: 13px;
  font-family: inherit;
  outline: none;
}

.form-input:focus, .form-textarea:focus, .form-select:focus {
  border-color: #4f46e5;
  box-shadow: 0 0 8px rgba(79, 70, 229, 0.2);
}

.crypto-selector-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
  margin-top: 8px;
}

.crypto-opt {
  background: #f8fafc;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sm);
  padding: 10px 6px;
  text-align: center;
  cursor: pointer;
  transition: all 0.15s ease;
}

.crypto-opt:hover {
  background: #edf2f7;
}

.crypto-opt.active {
  background: rgba(79, 70, 229, 0.1);
  border-color: #4f46e5;
  color: #4f46e5;
}

.crypto-opt-title {
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 2px;
}

.crypto-opt-sub {
  font-size: 9px;
  color: var(--text-muted);
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  background: #f8fafc;
}

.btn-primary {
  background: linear-gradient(135deg, #4f46e5, #6366f1);
  color: white;
  border: none;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
}

.btn-secondary {
  background: #ffffff;
  border: 1px solid var(--border-medium);
  color: var(--text-primary);
  padding: 10px 18px;
  border-radius: var(--radius-md);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
}

/* ─── AI Assistant Drawer ─────────────────────────────────────────────────── */
.ai-drawer {
  position: fixed;
  top: 60px;
  right: -420px;
  width: 400px;
  height: calc(100vh - 60px);
  background: #ffffff;
  border-left: 1px solid var(--border-medium);
  box-shadow: -10px 0 30px rgba(0, 0, 0, 0.1);
  z-index: 500;
  transition: right 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
}

.ai-drawer.open {
  right: 0;
}

.ai-drawer-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #f8fafc;
}

.ai-drawer-body {
  padding: 20px;
  flex: 1;
  overflow-y: auto;
  background: #ffffff;
}

.ai-action-card {
  background: #f8fafc;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px;
  margin-bottom: 16px;
}

.ai-card-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: #4f46e5;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ─── Calendar Workspace ──────────────────────────────────────────────────── */
.calendar-workspace {
  flex: 1;
  padding: 28px 32px;
  background: #ffffff;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.calendar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.event-card {
  background: #ffffff;
  border: 1px solid var(--border-medium);
  border-left: 4px solid #4f46e5;
  border-radius: var(--radius-md);
  padding: 18px;
  margin-bottom: 14px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  box-shadow: var(--shadow-card);
}

/* ─── Contacts Directory ──────────────────────────────────────────────────── */
.contacts-workspace {
  flex: 1;
  padding: 28px 32px;
  background: #ffffff;
  overflow-y: auto;
}

.contacts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.contact-card {
  background: #ffffff;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  padding: 18px;
  display: flex;
  align-items: center;
  gap: 14px;
  box-shadow: var(--shadow-card);
  transition: transform 0.15s ease;
}

.contact-card:hover {
  transform: translateY(-2px);
  border-color: #4f46e5;
}

.contact-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, #4f46e5, #06b6d4);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #ffffff;
  font-size: 0.95rem;
}

/* ─── Tasks Workspace ─────────────────────────────────────────────────────── */
.tasks-workspace {
  flex: 1;
  padding: 28px 32px;
  background: #ffffff;
  overflow-y: auto;
}

.task-item {
  background: #ffffff;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 10px;
  box-shadow: var(--shadow-card);
}

.task-item.completed {
  opacity: 0.55;
  text-decoration: line-through;
  background: #f8fafc;
}

/* ─── File Center & OCR Workspace ─────────────────────────────────────────── */
.files-workspace {
  flex: 1;
  padding: 28px 32px;
  background: #ffffff;
  overflow-y: auto;
}

.files-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 18px;
  margin-top: 20px;
}

.file-card {
  background: #ffffff;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  padding: 18px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 180px;
  box-shadow: var(--shadow-card);
}

.file-ocr-snippet {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: #334155;
  background: #f8fafc;
  border: 1px solid var(--border-subtle);
  padding: 10px;
  border-radius: var(--radius-sm);
  margin: 10px 0;
  max-height: 70px;
  overflow-y: auto;
}

/* ==============================================================================
   ACCESSIBILITY & FOCUS INDICATORS
   ============================================================================== */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

button:focus-visible,
select:focus-visible,
input:focus-visible,
[tabindex="0"]:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* ==============================================================================
   RESPONSIVE NAVIGATION BUTTONS & TOOLBARS
   ============================================================================== */
.btn-mobile-menu {
  display: none;
  background: #f1f5f9;
  border: 1px solid var(--border-medium);
  font-size: 1rem;
  color: var(--text-primary);
  cursor: pointer;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  align-items: center;
  justify-content: center;
}

.btn-mobile-nav-toggle {
  display: none;
  background: #f1f5f9;
  border: 1px solid var(--border-medium);
  font-size: 0.85rem;
  color: var(--text-primary);
  cursor: pointer;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  align-items: center;
  gap: 6px;
}

.btn-mobile-back {
  display: none;
  background: #f1f5f9;
  border: 1px solid var(--border-medium);
  font-size: 0.85rem;
  color: var(--text-primary);
  cursor: pointer;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  align-items: center;
  gap: 6px;
  font-weight: 700;
}

.btn-signout {
  background: #fff1f2 !important;
  border: 1px solid #fecdd3 !important;
  color: #e11d48 !important;
}

.btn-signout:hover {
  background: #ffe4e6 !important;
  color: #be123c !important;
}

/* ==============================================================================
   STORAGE QUOTA WIDGET (LIGHT THEME COHESIVE)
   ============================================================================== */
.storage-quota-widget {
  font-size: 11px;
  color: var(--text-muted);
  padding: 10px 12px;
  background: #f8fafc;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  margin-bottom: 8px;
}

.storage-quota-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 6px;
  font-weight: 600;
  color: var(--text-secondary);
}

.storage-quota-header strong {
  color: var(--text-primary);
}

.storage-quota-track {
  height: 6px;
  background: #e2e8f0;
  border-radius: 3px;
  overflow: hidden;
}

.storage-quota-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #6366f1, #10b981);
  transition: width 0.4s ease;
}

.storage-quota-fill.warning {
  background: linear-gradient(90deg, #f59e0b, #d97706);
}

.storage-quota-fill.danger {
  background: linear-gradient(90deg, #ef4444, #dc2626);
}

/* ==============================================================================
   SKELETON LOADERS & EMPTY STATES
   ============================================================================== */
@keyframes skeleton-shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.skeleton-shimmer {
  background: linear-gradient(90deg, #f1f5f9 25%, #e2e8f0 50%, #f1f5f9 75%);
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

.skeleton-card {
  padding: 16px 18px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.skeleton-line {
  height: 12px;
  border-radius: 4px;
}

.empty-state-container {
  padding: 48px 24px;
  text-align: center;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.empty-state-icon {
  font-size: 40px;
  margin-bottom: 4px;
}

.empty-state-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
}

.empty-state-desc {
  font-size: 13px;
  color: var(--text-secondary);
  max-width: 280px;
  line-height: 1.4;
}

.folder-stats-text {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 600;
}

/* ==============================================================================
   MEDIA QUERIES & RESPONSIVE BREAKPOINTS
   ============================================================================== */

/* Tablet & Intermediate Desktop (<= 1100px) */
@media (max-width: 1100px) {
  .vmaila-header {
    padding: 0 14px;
  }
  .header-center {
    max-width: 320px;
    margin: 0 12px;
  }
  .security-indicator {
    display: none;
  }
  .sidebar {
    width: 210px;
  }
  .message-list-pane {
    width: 320px;
  }
}

/* Tablet (<= 900px) */
@media (max-width: 900px) {
  .sidebar {
    width: 180px;
    padding: 12px 8px;
  }
  .btn-compose span {
    display: none;
  }
  .btn-compose {
    padding: 10px;
    border-radius: 50%;
    width: 42px;
    height: 42px;
    margin: 0 auto;
  }
  .folder-item {
    padding: 8px 10px;
    font-size: 12px;
  }
  .folder-icon-text span {
    font-size: 12px;
  }
  .message-list-pane {
    width: 300px;
  }
  .header-actions .btn-admin-link span,
  .header-actions .btn-ai-assistant span {
    display: none;
  }
}

/* Mobile Devices (<= 768px) */
@media (max-width: 768px) {
  .btn-mobile-menu {
    display: inline-flex;
  }
  .btn-mobile-nav-toggle {
    display: inline-flex;
  }
  .app-rail {
    display: none;
  }
  .header-center {
    display: none;
  }
  .vmaila-header {
    padding: 0 12px;
  }
  .brand-tagline {
    display: none;
  }
  .header-actions {
    gap: 8px;
  }
  .header-actions .btn-admin-link span,
  .header-actions .btn-ai-assistant span,
  .header-actions .btn-signout span {
    display: none;
  }
  .header-actions .btn-admin-link,
  .header-actions .btn-ai-assistant,
  .header-actions .btn-signout {
    padding: 6px 10px;
  }
  .account-selector {
    padding: 2px 6px;
    max-width: 130px;
  }
  #account-select {
    max-width: 90px;
    text-overflow: ellipsis;
  }

  .sidebar-backdrop {
    display: none;
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.45);
    z-index: 120;
    backdrop-filter: blur(2px);
  }
  .sidebar-backdrop.active {
    display: block;
  }

  .sidebar {
    position: fixed;
    top: 60px;
    left: -290px;
    width: 280px;
    height: calc(100vh - 60px);
    z-index: 130;
    background: #ffffff;
    box-shadow: 4px 0 24px rgba(0, 0, 0, 0.15);
    transition: left 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    padding: 16px;
  }
  .sidebar.open {
    left: 0;
  }
  .btn-compose span {
    display: inline;
  }
  .btn-compose {
    width: 100%;
    border-radius: var(--radius-md);
    height: auto;
    padding: 12px 18px;
  }

  .app-wrapper {
    position: relative;
    width: 100vw;
  }
  .message-list-pane {
    width: 100%;
    flex: 1;
    display: flex;
  }
  .message-detail-pane {
    display: none;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 70;
    background: #ffffff;
  }
  .message-detail-pane.mobile-active {
    display: flex;
  }
  .btn-mobile-back {
    display: inline-flex;
  }
}

/* Small Mobile (<= 480px) */
@media (max-width: 480px) {
  .brand-name {
    font-size: 17px;
  }
  .brand-icon {
    width: 28px;
    height: 28px;
    font-size: 15px;
  }
  .category-pill {
    padding: 3px 8px;
    font-size: 0.68rem;
  }
  .detail-header-bar {
    padding: 12px 14px;
  }
  .detail-actions {
    flex-wrap: wrap;
    gap: 8px;
  }
}