/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 7px 18px;
  font-size: 13px;
  font-weight: 500;
  line-height: 1.4;
  border-radius: 6px;
  border: 1px solid var(--color-border-default);
  color: var(--color-text-primary);
  background: var(--color-bg-secondary);
  white-space: nowrap;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
  text-decoration: none;
}

.btn:hover {
  background: var(--color-bg-tertiary);
  border-color: var(--color-border-emphasis);
  text-decoration: none;
  box-shadow: var(--shadow-xs);
}

.btn:active {
  background: var(--color-bg-secondary);
  transform: scale(0.98);
}

.btn:disabled {
  opacity: 0.45;
  pointer-events: none;
}

/* Primary */
.btn-primary {
  color: #ffffff;
  background: var(--color-accent-emphasis);
  border-color: var(--color-accent-emphasis);
  box-shadow: 0 1px 2px rgba(0,0,0,0.15);
}
.btn-primary:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  box-shadow: 0 2px 8px var(--color-accent-muted);
}

/* Danger */
.btn-danger {
  color: var(--color-danger);
  border-color: var(--color-danger-muted);
  background: var(--color-danger-muted);
}
.btn-danger:hover {
  color: #ffffff;
  background: var(--color-danger-emphasis);
  border-color: var(--color-danger-emphasis);
}

/* Ghost */
.btn-ghost {
  background: transparent;
  border-color: transparent;
  color: var(--color-text-secondary);
}
.btn-ghost:hover {
  background: var(--color-bg-tertiary);
  color: var(--color-text-primary);
}

/* Icon-only */
.btn-icon {
  width: 32px;
  height: 32px;
  padding: 0;
}

/* Small */
.btn-sm {
  padding: 4px 10px;
  font-size: 12px;
  border-radius: 5px;
}

/* Large */
.btn-lg {
  padding: 10px 24px;
  font-size: 15px;
  border-radius: 8px;
}

/* Block */
.btn-block {
  width: 100%;
}

/* ===== Login Card ===== */
.login-card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-lg);
}

.login-logo {
  text-align: center;
  margin-bottom: var(--space-8);
}

.login-logo .logo-circle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-bottom: var(--space-4);
}

.login-logo h1 {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-text-primary);
  letter-spacing: -0.5px;
}

.login-logo p {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-top: var(--space-1);
}

/* ===== Form ===== */
.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}

.form-input {
  width: 100%;
  padding: 8px 12px;
  font-size: 14px;
  line-height: 20px;
  color: var(--color-text-primary);
  background: var(--color-bg-input);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-md);
  outline: none;
  transition: border-color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.form-input::placeholder {
  color: var(--color-text-tertiary);
}

.form-input:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-muted);
}

.form-hint {
  font-size: 12px;
  color: var(--color-text-tertiary);
  margin-top: var(--space-1);
}

.form-error {
  font-size: 12px;
  color: var(--color-danger);
  margin-top: var(--space-1);
}

/* ===== Alert Messages ===== */
.alert {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: 13px;
  line-height: 1.5;
  margin-bottom: var(--space-4);
}

.alert-error {
  background: var(--color-danger-muted);
  border: 1px solid var(--color-danger);
  color: var(--color-danger);
}

.alert-success {
  background: var(--color-success-muted);
  border: 1px solid var(--color-success);
  color: var(--color-success);
}

.alert-info {
  background: var(--color-accent-muted);
  border: 1px solid var(--color-accent-muted);
  color: var(--color-accent);
}

/* ===== Device ID Display ===== */
.device-id-display {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-muted);
  border-radius: var(--radius-md);
  margin-top: var(--space-6);
}

.device-id-label {
  font-size: 11px;
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.device-id-value {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.device-id-copy {
  padding: 2px 8px;
  font-size: 11px;
  color: var(--color-text-tertiary);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast);
}

.device-id-copy:hover {
  color: var(--color-text-primary);
}

/* ===== Modal ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: var(--z-overlay);
  background: var(--color-bg-overlay);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
  animation: fadeIn var(--transition-fast);
}

.modal {
  width: 100%;
  max-width: 420px;
  background: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  animation: modalSlideIn var(--transition-slow);
}

@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: scale(0.95) translateY(-16px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--color-border-muted);
}

.modal-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text-primary);
}

.modal-close {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text-tertiary);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.modal-close:hover {
  background: var(--color-bg-tertiary);
  color: var(--color-text-primary);
}

.modal-body {
  padding: var(--space-6);
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--color-border-muted);
}

/* ===== Toast ===== */
.toast-container {
  position: fixed;
  bottom: var(--space-6);
  left: 50%;
  transform: translateX(-50%);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-4);
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: 13px;
  color: var(--color-text-primary);
  pointer-events: auto;
  animation: toastIn var(--transition-slow) ease-out;
  min-width: 200px;
  justify-content: center;
}

.toast.toast-out {
  animation: toastOut var(--transition-base) ease-in forwards;
}

.toast-success {
  border-color: var(--color-success);
}
.toast-success .toast-icon {
  color: var(--color-success);
}

.toast-error {
  border-color: var(--color-danger);
}
.toast-error .toast-icon {
  color: var(--color-danger);
}

.toast-icon {
  font-size: 16px;
  flex-shrink: 0;
}

@keyframes toastIn {
  from {
    opacity: 0;
    transform: translateY(16px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes toastOut {
  from {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
  to {
    opacity: 0;
    transform: translateY(8px) scale(0.95);
  }
}

/* ===== Theme Toggle ===== */
.theme-toggle {
  position: relative;
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  font-size: 17px;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.theme-toggle:hover {
  background: var(--color-bg-tertiary);
  color: var(--color-text-primary);
}

/* ===== Social Links ===== */
.social-btn {
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text-tertiary);
  font-size: 17px;
  text-decoration: none;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.social-btn:hover {
  background: var(--color-bg-tertiary);
  color: var(--color-text-primary);
}

/* ===== Contact Panel ===== */
.contact-panel {
  background: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-xl);
  padding: var(--space-5) var(--space-6);
  margin-top: var(--space-4);
}

.contact-panel h3 {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin: 0 0 var(--space-3) 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  font-size: 13px;
  font-family: inherit;
  line-height: 1.4;
  color: var(--color-text-secondary);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-muted);
  border-radius: var(--radius-md);
  text-decoration: none;
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.contact-link:hover {
  color: var(--color-text-primary);
  background: var(--color-bg-tertiary);
  border-color: var(--color-border-default);
}

.contact-link i {
  font-size: 15px;
  width: 18px;
  text-align: center;
}

.contact-email {
  position: relative;
  cursor: pointer;
}

.contact-email::after {
  content: attr(data-email);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  padding: 6px 12px;
  background: var(--color-bg-elevated);
  color: var(--color-text-primary);
  font-size: 12px;
  font-family: var(--font-mono, monospace);
  white-space: nowrap;
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  pointer-events: none;
  opacity: 0;
  transform-origin: bottom center;
  transition: opacity 0.15s ease, transform 0.15s ease;
  transform: translateX(-50%) translateY(4px);
}

.contact-email::before {
  content: '';
  position: absolute;
  bottom: calc(100% + 3px);
  left: 50%;
  transform: translateX(-50%);
  border: 5px solid transparent;
  border-top-color: var(--color-border-default);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s ease;
}

.contact-email:hover::after,
.contact-email:focus-visible::after {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.contact-email:hover::before,
.contact-email:focus-visible::before {
  opacity: 1;
}

/* ===== Loading Spinner ===== */
.spinner {
  display: inline-block;
  width: 18px;
  height: 18px;
  border: 2px solid var(--color-border-default);
  border-top-color: var(--color-accent);
  border-radius: var(--radius-full);
  animation: spin 0.6s linear infinite;
}

.spinner-sm {
  width: 14px;
  height: 14px;
}

/* ===== Skeleton Loading ===== */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-bg-tertiary) 25%,
    var(--color-bg-secondary) 50%,
    var(--color-bg-tertiary) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}

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

/* ===== Particles Background ===== */
.particles-container {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.particle {
  position: absolute;
  pointer-events: none;
}

/* Torch */
.particle-torch {
  width: 4px;
  height: 4px;
  background: var(--zone-accent, #e5534b);
  border-radius: var(--radius-full);
  box-shadow: 0 0 6px 2px var(--zone-accent-muted, rgba(229, 83, 75, 0.4));
  animation: torchFlicker 3s ease-in-out infinite;
  animation-delay: var(--delay, 0s);
}

@keyframes torchFlicker {
  0%, 100% { opacity: 0.3; transform: scale(0.8); }
  25% { opacity: 1; transform: scale(1.4); }
  50% { opacity: 0.5; transform: scale(1.2); }
  75% { opacity: 0.9; transform: scale(0.9); }
}

/* Leaf */
.particle-leaf {
  width: 8px;
  height: 8px;
  background: var(--zone-accent, #57ab5a);
  border-radius: 50% 0 50% 0;
  opacity: 0.6;
  animation: leafFall 8s linear infinite;
  animation-delay: var(--delay, 0s);
}

@keyframes leafFall {
  0% {
    transform: translateY(-5vh) translateX(0) rotate(0deg);
    opacity: 0;
  }
  10% { opacity: 0.7; }
  90% { opacity: 0.7; }
  100% {
    transform: translateY(105vh) translateX(var(--drift, 40px)) rotate(var(--spin, 360deg));
    opacity: 0;
  }
}

/* Sand */
.particle-sand {
  width: 3px;
  height: 3px;
  background: var(--zone-accent, #e09b56);
  border-radius: var(--radius-full);
  opacity: 0.5;
  animation: sandDrift 6s linear infinite;
  animation-delay: var(--delay, 0s);
}

@keyframes sandDrift {
  0% {
    transform: translate(0, -5vh);
    opacity: 0;
  }
  15% { opacity: 0.6; }
  85% { opacity: 0.6; }
  100% {
    transform: translate(calc(var(--drift, 60px)), 105vh);
    opacity: 0;
  }
}

/* Snowflake */
.particle-snow {
  width: 6px;
  height: 6px;
  background: rgba(255, 255, 255, 0.7);
  border-radius: var(--radius-full);
  animation: snowFall 10s linear infinite;
  animation-delay: var(--delay, 0s);
}

@keyframes snowFall {
  0% {
    transform: translateY(-5vh) translateX(0);
    opacity: 0;
  }
  10% { opacity: 0.8; }
  90% { opacity: 0.4; }
  100% {
    transform: translateY(105vh) translateX(var(--drift, 30px));
    opacity: 0;
  }
}

/* ===== Utility ===== */
.text-mono {
  font-family: var(--font-mono);
}

.text-sm {
  font-size: 13px;
}

.text-xs {
  font-size: 12px;
}

.text-center {
  text-align: center;
}

.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }

.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }

.hidden {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ===== Admin Stats Cards ===== */
.stat-card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  text-align: center;
}
.stat-value {
  font-size: 26px;
  font-weight: 700;
  color: var(--color-accent);
}
.stat-label {
  font-size: 11px;
  color: var(--color-text-tertiary);
  margin-top: 2px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

/* ===== Admin User List Items ===== */
.user-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3);
  border-bottom: 1px solid var(--color-border-muted);
  transition: background var(--transition-fast);
  flex-wrap: wrap;
}
.user-item:last-child { border-bottom: none; }
.user-item:hover { background: var(--color-accent-subtle); }
.user-avatar {
  width: 30px; height: 30px;
  border-radius: var(--radius-full);
  background: var(--color-bg-tertiary);
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; color: var(--color-accent);
  flex-shrink: 0;
}
.user-info { flex: 1; min-width: 100px; }
.user-name { font-weight: 600; color: var(--color-text-primary); font-size: 13px; }
.user-email { font-size: 11px; color: var(--color-text-tertiary); word-break: break-all; }
.user-meta { display: flex; gap: 4px; flex-wrap: wrap; align-items: center; }
.user-badge {
  font-size: 10px; padding: 2px 6px;
  border-radius: var(--radius-full);
  background: var(--color-accent-subtle);
  color: var(--color-accent);
  flex-shrink: 0;
}
.user-badge.admin {
  background: var(--color-warning-muted);
  color: var(--color-warning);
}

/* ===== Admin Tab Active State ===== */
[data-atab].active {
  color: var(--color-accent) !important;
  border-bottom-color: var(--color-accent) !important;
}

@media (max-width: 600px) {
  .stats-row { grid-template-columns: 1fr 1fr; }
  .stat-value { font-size: 20px; }
  .user-meta { width: 100%; justify-content: flex-end; margin-top: 4px; }
}