/* AceNick Base Styles & Elements */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-sans);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
  overflow-x: hidden;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  text-decoration: underline;
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  border-radius: var(--radius-md);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  min-height: var(--touch-target);
  min-width: var(--touch-target);
  user-select: none;
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
a:focus-visible {
  outline: var(--focus-outline);
  outline-offset: var(--focus-offset);
}

/* Button Variants */
.btn-primary {
  background: var(--color-primary);
  color: var(--color-primary-text);
  font-weight: 600;
  padding: 0 var(--space-5);
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  box-shadow: var(--shadow-glow);
}
.btn-primary:active {
  transform: scale(0.98);
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  font-weight: 500;
  padding: 0 var(--space-4);
}
.btn-secondary:hover {
  background: var(--color-surface-hover);
  border-color: var(--color-border-hover);
}

.btn-icon {
  width: var(--touch-target);
  height: var(--touch-target);
  padding: 0;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
}
.btn-icon:hover {
  background: var(--color-surface-hover);
  color: var(--color-text);
}

/* Form Inputs */
.input-text {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  border-radius: var(--radius-md);
  padding: 0 var(--space-4);
  min-height: var(--touch-target);
  width: 100%;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.input-text:hover {
  border-color: var(--color-border-hover);
}
.input-text:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-light);
  outline: none;
}

/* Typography Helpers */
h1, h2, h3, h4 {
  color: var(--color-text);
  font-weight: 700;
  line-height: 1.25;
}
p {
  color: var(--color-text);
  margin-bottom: var(--space-4);
}
p.intro {
  color: var(--color-text-muted);
  font-size: 1.125rem;
}

/* Screen Reader Only (A11y Announcer) */
.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;
}

/* Skip Link: visually hidden until focused via keyboard */
.skip-link.sr-only:focus,
.skip-link:focus {
  position: fixed;
  top: var(--space-3);
  left: var(--space-3);
  width: auto;
  height: auto;
  padding: var(--space-2) var(--space-4);
  margin: 0;
  overflow: visible;
  clip: auto;
  white-space: normal;
  background: var(--color-primary);
  color: var(--color-primary-text);
  z-index: 10000;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  font-weight: 600;
  font-size: 0.875rem;
  text-decoration: none;
  outline: var(--focus-outline);
  outline-offset: 2px;
}

/* Toast Notification Overlay */
.toast-container {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  pointer-events: none;
}
.toast {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: 0.875rem;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  animation: toast-in 0.2s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  pointer-events: auto;
}
.toast-success {
  border-left: 4px solid var(--color-success);
}
.toast-warning {
  border-left: 4px solid var(--color-warning);
}
.toast-danger {
  border-left: 4px solid var(--color-danger);
}
@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateY(12px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}
@keyframes toast-out {
  from {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
  to {
    opacity: 0;
    transform: translateY(8px) scale(0.96);
  }
}

/* Utility Classes for strict CSP compliance */
.hidden {
  display: none !important;
}
.text-center {
  text-align: center;
}
.justify-center {
  justify-content: center;
}