:root {
  --font-main:
    "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif;

  --transition-fast: 0.18s ease;
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #f1f5f9;
  --card-bg: rgba(255, 255, 255, 0.85);
  --card-border: rgba(226, 232, 240, 0.9);
  --card-shadow:
    0 20px 40px -15px rgba(15, 23, 42, 0.07), 0 0 1px 1px rgba(0, 0, 0, 0.03);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;

  --brand-icon-bg: #e0e7ff;
  --brand-icon-color: #4338ca;

  --accent-primary: #4f46e5;
  --accent-hover: #4338ca;
  --accent-glow: rgba(79, 70, 229, 0.18);

  --badge-bg: #ecfdf5;
  --badge-text: #065f46;
  --badge-border: #a7f3d0;
  --badge-dot: #10b981;

  --host-bg: #f8fafc;
  --host-border: #e2e8f0;
  --host-text: #334155;

  --email-box-bg: #f8fafc;
  --email-box-border: #e2e8f0;

  --btn-secondary-bg: #ffffff;
  --btn-secondary-border: #cbd5e1;
  --btn-secondary-text: #334155;
  --btn-secondary-hover-bg: #f1f5f9;

  --glow-1: rgba(99, 102, 241, 0.12);
  --glow-2: rgba(59, 130, 246, 0.12);
  --grid-line: rgba(15, 23, 42, 0.04);
}

[data-theme="dark"] {
  --bg-primary: #090d16;
  --bg-secondary: #0f172a;
  --card-bg: rgba(15, 23, 42, 0.75);
  --card-border: rgba(255, 255, 255, 0.09);
  --card-shadow:
    0 25px 50px -12px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(255, 255, 255, 0.05);

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --brand-icon-bg: rgba(99, 102, 241, 0.15);
  --brand-icon-color: #818cf8;

  --accent-primary: #6366f1;
  --accent-hover: #4f46e5;
  --accent-glow: rgba(99, 102, 241, 0.35);

  --badge-bg: rgba(16, 185, 129, 0.12);
  --badge-text: #34d399;
  --badge-border: rgba(52, 211, 153, 0.25);
  --badge-dot: #10b981;

  --host-bg: rgba(2, 6, 23, 0.6);
  --host-border: rgba(255, 255, 255, 0.08);
  --host-text: #cbd5e1;

  --email-box-bg: rgba(2, 6, 23, 0.5);
  --email-box-border: rgba(255, 255, 255, 0.07);

  --btn-secondary-bg: rgba(255, 255, 255, 0.06);
  --btn-secondary-border: rgba(255, 255, 255, 0.12);
  --btn-secondary-text: #e2e8f0;
  --btn-secondary-hover-bg: rgba(255, 255, 255, 0.1);

  --glow-1: rgba(99, 102, 241, 0.16);
  --glow-2: rgba(139, 92, 246, 0.14);
  --grid-line: rgba(255, 255, 255, 0.03);
}

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

html {
  font-family: var(--font-main);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100%;
  transition:
    background-color var(--transition-normal),
    color var(--transition-normal);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow-x: hidden;
}

.bg-grid-overlay {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
  z-index: 0;
}

.bg-glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(100px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.8;
  animation: pulse-glow 8s ease-in-out infinite alternate;
}

.bg-glow-1 {
  width: 500px;
  height: 500px;
  top: -150px;
  right: 10%;
  background: radial-gradient(circle, var(--glow-1) 0%, transparent 70%);
}

.bg-glow-2 {
  width: 600px;
  height: 600px;
  bottom: -200px;
  left: 5%;
  background: radial-gradient(circle, var(--glow-2) 0%, transparent 70%);
  animation-delay: -4s;
}

@keyframes pulse-glow {
  0% {
    transform: scale(1) translate(0, 0);
    opacity: 0.6;
  }
  100% {
    transform: scale(1.15) translate(20px, -20px);
    opacity: 0.9;
  }
}

.app-container {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 1.5rem 1.5rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

.top-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.brand-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background-color: var(--brand-icon-bg);
  color: var(--brand-icon-color);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
  transition: all var(--transition-normal);
}

.brand-icon svg {
  width: 20px;
  height: 20px;
}

.brand-text {
  color: var(--text-primary);
}

.theme-dropdown {
  position: relative;
  user-select: none;
}

.theme-menu-btn {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  color: var(--text-primary);
  padding: 0.45rem 0.75rem 0.45rem 0.65rem;
  border-radius: 12px;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.04);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: all var(--transition-fast);
}

.theme-menu-btn:hover {
  transform: translateY(-1px);
  border-color: var(--accent-primary);
  box-shadow: 0 4px 12px var(--accent-glow);
}

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

.theme-btn-current-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  color: var(--accent-primary);
}

.theme-btn-current-icon svg {
  width: 18px;
  height: 18px;
}

.theme-btn-label {
  color: var(--text-primary);
  font-size: 0.875rem;
  font-weight: 600;
}

.theme-shortcut-hint {
  font-size: 0.6875rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-weight: 700;
  color: var(--text-muted);
  background: var(--btn-secondary-bg);
  border: 1px solid var(--card-border);
  padding: 1px 5px;
  border-radius: 5px;
  line-height: 1.2;
}

.chevron-icon {
  width: 14px;
  height: 14px;
  color: var(--text-muted);
  transition: transform var(--transition-fast);
}

.theme-dropdown.open .chevron-icon {
  transform: rotate(180deg);
}

.theme-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 165px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  padding: 0.35rem;
  list-style: none;
  box-shadow:
    0 12px 30px -4px rgba(0, 0, 0, 0.18),
    0 0 1px 1px var(--card-border);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  z-index: 50;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px) scale(0.96);
  transform-origin: top right;
  transition:
    opacity var(--transition-fast),
    transform var(--transition-fast),
    visibility var(--transition-fast);
}

.theme-dropdown.open .theme-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.theme-menu-item {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  padding: 0.5rem 0.75rem;
  border-radius: 9px;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  text-align: left;
  transition:
    background-color var(--transition-fast),
    color var(--transition-fast);
}

.theme-menu-item:hover,
.theme-menu-item:focus-visible {
  background-color: var(--btn-secondary-hover-bg);
  color: var(--text-primary);
  outline: none;
}

.theme-menu-item.active {
  color: var(--accent-primary);
  background-color: var(--badge-bg);
  font-weight: 600;
}

.menu-item-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.menu-item-icon svg {
  width: 16px;
  height: 16px;
}

.menu-item-text {
  flex: 1;
}

.menu-item-check {
  width: 14px;
  height: 14px;
  opacity: 0;
  color: var(--accent-primary);
  transition: opacity var(--transition-fast);
  flex-shrink: 0;
}

.theme-menu-item.active .menu-item-check {
  opacity: 1;
}

.main-content {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3rem 0;
  flex: 1;
}

.card-wrapper {
  position: relative;
  width: 100%;
  max-width: 680px;
}

.card-glow {
  position: absolute;
  inset: -1px;
  background: linear-gradient(135deg, var(--accent-primary), transparent 60%);
  border-radius: 25px;
  opacity: 0.25;
  filter: blur(12px);
  z-index: 0;
  pointer-events: none;
}

.card {
  position: relative;
  z-index: 1;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 24px;
  padding: 3rem 2.5rem;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--card-shadow);
  text-align: center;
  transition:
    background-color var(--transition-normal),
    border-color var(--transition-normal),
    box-shadow var(--transition-normal);
}

.status-badge-container {
  display: flex;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.9rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--badge-text);
  background-color: var(--badge-bg);
  border: 1px solid var(--badge-border);
  border-radius: 100px;
  letter-spacing: 0.01em;
}

.status-pulse {
  width: 8px;
  height: 8px;
  background-color: var(--badge-dot);
  border-radius: 50%;
  position: relative;
}

.status-pulse::after {
  content: "";
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  background-color: var(--badge-dot);
  opacity: 0.7;
  animation: ripple 2s infinite;
}

@keyframes ripple {
  0% {
    transform: scale(1);
    opacity: 0.7;
  }
  100% {
    transform: scale(2.2);
    opacity: 0;
  }
}

.main-title {
  font-size: 2.25rem;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.description {
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--text-secondary);
  max-width: 540px;
  margin: 0 auto 1.75rem;
}

.description strong {
  color: var(--text-primary);
  font-weight: 600;
}

.host-indicator {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.45rem 1rem;
  background-color: var(--host-bg);
  border: 1px solid var(--host-border);
  border-radius: 12px;
  font-size: 0.875rem;
  color: var(--host-text);
  margin-bottom: 2rem;
  font-family: inherit;
}

.host-icon {
  width: 16px;
  height: 16px;
  color: var(--accent-primary);
}

.host-name {
  font-weight: 600;
}

.host-status {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--badge-dot);
  background: var(--badge-bg);
  padding: 0.15rem 0.45rem;
  border-radius: 6px;
}

.divider {
  height: 1px;
  background: var(--card-border);
  margin: 0 -2.5rem 2rem;
}

.contact-section {
  text-align: left;
}

.contact-label {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.85rem;
  text-align: center;
}

.email-card {
  background: var(--email-box-bg);
  border: 1px solid var(--email-box-border);
  border-radius: 16px;
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  transition: border-color var(--transition-fast);
}

.email-card:hover {
  border-color: var(--accent-primary);
}

.email-info {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.email-icon {
  width: 20px;
  height: 20px;
  color: var(--accent-primary);
  flex-shrink: 0;
}

.email-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.55rem 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  font-family: inherit;
  border-radius: 10px;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-fast);
  outline: none;
}

.btn:focus-visible {
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.btn-icon {
  width: 16px;
  height: 16px;
}

.btn-primary {
  background-color: var(--accent-primary);
  color: #ffffff;
  border: 1px solid transparent;
  box-shadow: 0 2px 8px var(--accent-glow);
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px var(--accent-glow);
}

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

.btn-secondary {
  background-color: var(--btn-secondary-bg);
  border: 1px solid var(--btn-secondary-border);
  color: var(--btn-secondary-text);
}

.btn-secondary:hover {
  background-color: var(--btn-secondary-hover-bg);
  transform: translateY(-1px);
}

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

.check-icon {
  color: var(--badge-dot);
}

.hidden {
  display: none !important;
}

.footer {
  text-align: center;
  padding: 1rem 0;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.footer strong {
  color: var(--text-primary);
  font-weight: 600;
}

.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  opacity: 0;
  visibility: hidden;
  background-color: var(--text-primary);
  color: var(--bg-primary);
  padding: 0.75rem 1.25rem;
  border-radius: 100px;
  font-size: 0.875rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
  z-index: 100;
  transition:
    transform var(--transition-normal),
    opacity var(--transition-normal),
    visibility var(--transition-normal);
  pointer-events: none;
}

.toast svg {
  width: 18px;
  height: 18px;
  color: var(--badge-dot);
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
  visibility: visible;
}

@media (max-width: 640px) {
  .app-container {
    padding: 1rem 1rem 1.5rem;
  }

  .card {
    padding: 2.25rem 1.5rem;
    border-radius: 20px;
  }

  .main-title {
    font-size: 1.75rem;
  }

  .description {
    font-size: 0.95rem;
  }

  .divider {
    margin: 0 -1.5rem 1.5rem;
  }

  .email-card {
    flex-direction: column;
    align-items: stretch;
    text-align: center;
    gap: 1rem;
  }

  .email-info {
    justify-content: center;
  }

  .email-actions {
    justify-content: stretch;
  }

  .email-actions .btn {
    flex: 1;
  }
}