/* ==========================================================================
   Gmail IMAP Inbox Reader - Modern Dark Glassmorphism CSS System
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@500;600;700&display=swap');

:root {
  --bg-dark: #090d16;
  --bg-card: rgba(17, 24, 39, 0.75);
  --bg-card-hover: rgba(31, 41, 55, 0.85);
  --bg-sidebar: #0f172a;
  --border-color: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(99, 102, 241, 0.3);

  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-glow: rgba(99, 102, 241, 0.4);
  --accent-cyan: #06b6d4;
  --accent-emerald: #10b981;
  --accent-rose: #f43f5e;
  --accent-amber: #f59e0b;

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-subtle: #64748b;

  --glass-bg: rgba(15, 23, 42, 0.7);
  --glass-blur: blur(16px);
  --shadow-lg: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.25);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
}

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

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-dark);
  background-image: 
    radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.12) 0px, transparent 50%),
    radial-gradient(at 100% 100%, rgba(6, 182, 212, 0.1) 0px, transparent 50%);
  background-attachment: fixed;
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: rgba(15, 23, 42, 0.5);
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--primary);
}

/* Header Navbar */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 28px;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
}

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

.brand-icon {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--primary), var(--accent-cyan));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-glow);
}

.brand-icon svg {
  width: 22px;
  height: 22px;
  fill: #ffffff;
}

.brand-text h1 {
  font-family: 'Outfit', sans-serif;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(to right, #ffffff, #cbd5e1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-text p {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 500;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-emerald);
  box-shadow: 0 0 10px var(--accent-emerald);
}

.status-dot.checking {
  background-color: var(--accent-amber);
  box-shadow: 0 0 10px var(--accent-amber);
  animation: pulse 1s infinite alternate;
}

.status-dot.error {
  background-color: var(--accent-rose);
  box-shadow: 0 0 10px var(--accent-rose);
}

@keyframes pulse {
  from { opacity: 0.4; }
  to { opacity: 1; }
}

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

/* Control Bar (Email Check Box) */
.control-bar {
  padding: 16px 28px;
  background: rgba(15, 23, 42, 0.4);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.search-input-group {
  display: flex;
  align-items: center;
  flex: 1;
  max-width: 600px;
  background: rgba(30, 41, 59, 0.6);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 4px 6px 4px 14px;
  transition: all 0.25s ease;
}

.search-input-group:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

.search-input-group svg {
  width: 18px;
  height: 18px;
  fill: var(--text-muted);
  margin-right: 10px;
}

.search-input-group input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-main);
  font-size: 0.92rem;
  font-family: inherit;
}

.search-input-group input::placeholder {
  color: var(--text-subtle);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  border: none;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  user-select: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), #4338ca);
  color: #ffffff;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-hover), #3730a3);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.45);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-icon {
  padding: 10px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-icon:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-main);
  border-color: var(--primary);
}

.refresh-select {
  background: rgba(30, 41, 59, 0.6);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-main);
  padding: 10px 14px;
  font-size: 0.85rem;
  outline: none;
  cursor: pointer;
}

/* App Main Container (Split Layout) */
.app-container {
  display: flex;
  flex: 1;
  height: calc(100vh - 145px);
  overflow: hidden;
}

/* Sidebar List */
.sidebar-pane {
  width: 380px;
  min-width: 320px;
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
}

.sidebar-header {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(15, 23, 42, 0.6);
}

.sidebar-title {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.email-count-badge {
  background: rgba(99, 102, 241, 0.2);
  color: #a5b4fc;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 600;
}

.inbox-list {
  flex: 1;
  overflow-y: auto;
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.email-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 14px;
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
  overflow: hidden;
}

.email-item:hover {
  background: var(--bg-card-hover);
  border-color: rgba(255, 255, 255, 0.15);
  transform: translateX(2px);
}

.email-item.active {
  background: rgba(99, 102, 241, 0.15);
  border-color: var(--primary);
  box-shadow: inset 3px 0 0 var(--primary);
}

.email-item-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}

.sender-name {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 200px;
}

.email-time {
  font-size: 0.72rem;
  color: var(--text-subtle);
}

.email-subject {
  font-size: 0.85rem;
  font-weight: 500;
  color: #e2e8f0;
  margin-bottom: 6px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.email-snippet {
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.otp-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 8px;
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.4);
  color: #6ee7b7;
  padding: 3px 8px;
  border-radius: 6px;
  font-size: 0.72rem;
  font-weight: 600;
  font-family: monospace;
}

/* Detail View Pane */
.detail-pane {
  flex: 1;
  background: rgba(11, 15, 25, 0.6);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.detail-empty {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px;
  text-align: center;
  color: var(--text-muted);
}

.detail-empty svg {
  width: 64px;
  height: 64px;
  fill: var(--text-subtle);
  margin-bottom: 16px;
  opacity: 0.5;
}

.detail-header {
  padding: 24px;
  border-bottom: 1px solid var(--border-color);
  background: rgba(15, 23, 42, 0.5);
}

.detail-subject {
  font-family: 'Outfit', sans-serif;
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-main);
  line-height: 1.3;
}

.meta-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

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

.avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-cyan), var(--primary));
  color: #fff;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

.sender-details .from-text {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
}

.sender-details .to-text {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.date-text {
  font-size: 0.8rem;
  color: var(--text-subtle);
}

/* OTP Showcase Box */
.otp-box {
  margin: 16px 24px 0 24px;
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.15), rgba(6, 182, 212, 0.1));
  border: 1px solid rgba(16, 185, 129, 0.4);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 0 20px rgba(16, 185, 129, 0.15);
}

.otp-info {
  display: flex;
  align-items: center;
  gap: 14px;
}

.otp-icon {
  width: 36px;
  height: 36px;
  background: rgba(16, 185, 129, 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-emerald);
}

.otp-text label {
  display: block;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #6ee7b7;
  font-weight: 600;
}

.otp-code {
  font-family: monospace;
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: #ffffff;
}

.btn-copy-otp {
  background: var(--accent-emerald);
  color: #064e3b;
  font-weight: 700;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-copy-otp:hover {
  background: #34d399;
  transform: scale(1.03);
}

/* Email Body Container & Tabs */
.view-tabs {
  display: flex;
  padding: 0 24px;
  border-bottom: 1px solid var(--border-color);
  background: rgba(15, 23, 42, 0.3);
  margin-top: 16px;
}

.tab-btn {
  padding: 12px 18px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
}

.tab-btn:hover {
  color: var(--text-main);
}

.tab-btn.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
  font-weight: 600;
}

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

.body-iframe {
  width: 100%;
  height: 100%;
  min-height: 400px;
  border: none;
  background: #ffffff;
  border-radius: var(--radius-md);
}

.body-plain {
  font-family: monospace;
  white-space: pre-wrap;
  word-break: break-word;
  background: rgba(15, 23, 42, 0.7);
  padding: 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  color: #e2e8f0;
  font-size: 0.88rem;
  line-height: 1.6;
}

/* Modal Popup */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: all 0.3s ease;
}

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

.modal-card {
  width: 90%;
  max-width: 480px;
  background: var(--bg-sidebar);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-lg);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.modal-title {
  font-family: 'Outfit', sans-serif;
  font-size: 1.15rem;
  font-weight: 700;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  padding: 10px 14px;
  background: rgba(30, 41, 59, 0.6);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-main);
  font-size: 0.9rem;
  outline: none;
}

.form-control:focus {
  border-color: var(--primary);
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 2000;
}

.toast {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--accent-emerald);
  color: var(--text-main);
  padding: 12px 18px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: 0.85rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 10px;
  animation: slideUp 0.3s ease forwards;
}

@keyframes slideUp {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* Skeleton Loading */
.skeleton {
  background: linear-gradient(90deg, rgba(255,255,255,0.03) 25%, rgba(255,255,255,0.08) 50%, rgba(255,255,255,0.03) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: 4px;
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}