/**
 * Lydia Sierra — Personal Developer Portfolio
 * Foundational Stylesheet (Reset, Base, Typography, Surfaces, Buttons & Badges)
 * Conforming to DESIGN_SPEC.md
 */

/* ==========================================================================
   1. Modern CSS Reset & Browser Defaults
   ========================================================================== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
  -webkit-text-size-adjust: 100%;
  tab-size: 4;
}

body {
  min-height: 100vh;
  background-color: var(--color-bg);
  color: var(--color-text-main);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* Consistent Text Selection */
::selection {
  background-color: var(--color-selection-bg);
  color: var(--color-selection-text);
}

/* Clean Media Defaults */
img,
picture,
svg,
video,
canvas {
  display: block;
  max-width: 100%;
  height: auto;
}

/* Reset List Styles on Semantic Lists */
ul,
ol {
  list-style: none;
}

/* Form Controls Font & Styling Reset */
button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

/* ==========================================================================
   2. Accessibility & Keyboard Focus Indicators
   ========================================================================== */
:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

:focus:not(:focus-visible) {
  outline: none;
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-xs);
}

[data-theme="dark"] :focus-visible {
  outline-color: #9EC4A7;
}

@media (forced-colors: active) {
  :focus-visible {
    outline: 2px solid Highlight;
  }
}

/* Skip-to-Content Link */
.skip-link {
  position: absolute;
  top: -120px;
  left: 1.25rem;
  z-index: 10000;
  padding: 0.75rem 1.25rem;
  background-color: var(--color-primary);
  color: var(--color-primary-contrast);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--text-sm);
  text-decoration: none;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 1.25rem;
}

/* Disabled & Pending States */
[aria-disabled="true"],
:disabled {
  cursor: not-allowed;
  opacity: 0.65;
}

/* Reduced Motion User Preferences */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ==========================================================================
   3. Base Typography
   ========================================================================== */
h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--color-text-main);
  text-wrap: balance;
}

h1 {
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

h2 {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 400;
  line-height: 1.2;
}

h3 {
  font-family: var(--font-body);
  font-size: var(--text-xl);
  font-weight: 600;
  line-height: 1.3;
}

h4 {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  font-weight: 600;
  line-height: 1.35;
}

p {
  color: var(--color-text-main);
  max-inline-size: 68ch;
}

/* Monospace & Technical Elements */
code,
kbd,
samp,
pre {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

/* Accent Text & Editorial Highlights */
.accent-text {
  color: var(--color-turquoise-text);
  font-style: italic;
  font-family: var(--font-display);
}

/* Personal Signature Treatment */
.signature {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--text-3xl);
  color: #D48B8B;
  line-height: 1;
  user-select: none;
}

[data-theme="dark"] .signature {
  color: var(--color-accent-pink);
}

/* Interactive Base Links */
a {
  color: inherit;
  text-decoration-skip-ink: auto;
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary);
}

/* ==========================================================================
   4. Layout Containers, Surfaces & Section Spacing
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

section {
  margin-block-end: var(--section-gap);
}

/* Reusable Content Surfaces */
.surface-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  padding: var(--panel-padding);
}

.surface-subtle {
  background-color: var(--color-surface-subtle);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}

/* ==========================================================================
   5. Reusable Button Components
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 44px; /* Accessible minimum touch target */
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
  transition:
    background-color var(--transition-fast),
    border-color var(--transition-fast),
    color var(--transition-fast),
    box-shadow var(--transition-fast),
    transform var(--transition-fast);
}

.btn:active:not([aria-disabled="true"]):not(:disabled) {
  transform: translateY(0);
}

/* Primary Button Variant */
.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-primary-contrast);
  border: 1px solid transparent;
}

.btn-primary:hover:not([aria-disabled="true"]):not(:disabled) {
  background-color: var(--color-primary-hover);
  color: var(--color-primary-contrast);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

.btn-primary:active:not([aria-disabled="true"]):not(:disabled) {
  background-color: var(--color-primary-active);
}

/* Secondary Button Variant */
.btn-secondary {
  background-color: var(--color-surface);
  color: var(--color-text-main);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover:not([aria-disabled="true"]):not(:disabled) {
  background-color: var(--color-surface-subtle);
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-1px);
}

.btn-secondary:active:not([aria-disabled="true"]):not(:disabled) {
  background-color: var(--color-border-subtle);
}

/* Compact Button Modifier */
.btn-sm {
  min-height: 38px;
  padding: 0.45rem 0.875rem;
  font-size: var(--text-xs);
  border-radius: var(--radius-sm);
}

/* Circular Icon Toggle Button */
.btn-icon-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  min-width: 40px;
  min-height: 40px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  background-color: var(--color-surface);
  color: var(--color-text-main);
  transition:
    background-color var(--transition-fast),
    border-color var(--transition-fast),
    color var(--transition-fast);
}

.btn-icon-toggle:hover {
  background-color: var(--color-surface-subtle);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* Button Icon Helper */
.btn-icon {
  flex-shrink: 0;
  display: inline-block;
  vertical-align: middle;
}

/* ==========================================================================
   6. Reusable Badges & Status Indicators
   ========================================================================== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
}

/* Greeting Badge (Hero) */
.badge-greeting {
  background-color: var(--color-accent-pink);
  color: #2E2A27; /* Guaranteed AAA contrast against blush fill */
  box-shadow: var(--shadow-sm);
}

/* Subtle Pill Badge */
.badge-subtle {
  background-color: var(--color-surface-subtle);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border-subtle);
}

/* Pending Indicator Tag (e.g. CV Coming Soon) */
.badge-pending {
  display: inline-block;
  font-size: 0.75em;
  font-weight: 600;
  opacity: 0.9;
  margin-inline-start: 0.35rem;
  vertical-align: baseline;
}

/* Glowing Status Indicator Dot */
.status-indicator-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background-color: #34A853;
  box-shadow: 0 0 0 3px rgba(52, 168, 83, 0.25);
  flex-shrink: 0;
}

/* ==========================================================================
   7. Accessibility Utility: Screen Reader Only
   ========================================================================== */
.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;
}