/* ============================================
   GLOBAL.CSS — Pam Tech Portfolio
   Base styles, typography, utility classes
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;900&family=JetBrains+Mono:wght@400;500&display=swap');

/* ---- Base ---- */
body {
  font-family: var(--font-primary);
  font-size: var(--text-base);
  font-weight: var(--weight-regular);
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  line-height: var(--leading-base);
  transition: background-color var(--transition-slow), color var(--transition-slow);
}

/* ---- Typography ---- */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--weight-bold);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-snug);
  color: var(--color-text-primary);
}

h1 { font-size: clamp(2.2rem, 5vw, var(--text-5xl)); }
h2 { font-size: clamp(1.6rem, 3.5vw, var(--text-3xl)); }
h3 { font-size: clamp(1.2rem, 2.5vw, var(--text-xl)); }
h4 { font-size: var(--text-lg); }
h5 { font-size: var(--text-md); }
h6 { font-size: var(--text-base); }

p {
  color: var(--color-text-secondary);
  line-height: var(--leading-loose);
}

strong { font-weight: var(--weight-semi); color: var(--color-text-primary); }
em     { font-style: italic; }

code, kbd, samp, pre {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

code {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  padding: 0.15em 0.45em;
  border-radius: var(--radius-sm);
  color: var(--color-accent);
}

pre {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  overflow-x: auto;
}

a {
  color: var(--color-accent);
  transition: color var(--transition-fast);
}
a:hover { color: var(--color-accent-hover); }

/* ---- Layout Containers ---- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.container--narrow {
  max-width: var(--container-narrow);
}

.container--wide {
  max-width: var(--container-wide);
}

/* ---- Section ---- */
.section {
  padding-block: var(--space-24);
}

.section--sm {
  padding-block: var(--space-16);
}

.section--lg {
  padding-block: var(--space-32);
}

.section__header {
  margin-bottom: var(--space-16);
}

.section__label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--weight-semi);
  font-family: var(--font-mono);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}

.section__label::before {
  content: '';
  display: inline-block;
  width: 20px;
  height: 1px;
  background: var(--color-accent);
}

.section__title {
  margin-bottom: var(--space-4);
}

.section__subtitle {
  color: var(--color-text-secondary);
  font-size: var(--text-md);
  max-width: 60ch;
  line-height: var(--leading-loose);
}

/* ---- Divider ---- */
.divider {
  height: 1px;
  background: linear-gradient(
    to right,
    transparent,
    var(--color-border),
    transparent
  );
  margin-block: var(--space-2);
}

/* ---- Accent Line ---- */
.accent-line {
  display: inline-block;
  width: 40px;
  height: 2px;
  background: var(--color-accent);
  margin-bottom: var(--space-4);
  border-radius: var(--radius-full);
}

/* ---- Scrollbar ---- */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--color-bg-secondary); }
::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover { background: var(--color-accent-dark); }

/* ---- Selection ---- */
::selection {
  background: rgba(0, 191, 255, 0.2);
  color: var(--color-text-primary);
}

/* ---- Page wrapper ---- */
.page-wrapper {
  padding-top: var(--navbar-height);
}

/* ---- 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-width: 0;
}

/* ---- Grid helpers ---- */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-6);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-5);
}

/* ---- Flex helpers ---- */
.flex        { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-col    { display: flex; flex-direction: column; }

/* ---- Text utilities ---- */
.text-center  { text-align: center; }
.text-accent  { color: var(--color-accent); }
.text-muted   { color: var(--color-text-muted); }
.text-secondary { color: var(--color-text-secondary); }
.text-mono    { font-family: var(--font-mono); }
.text-sm      { font-size: var(--text-sm); }
.text-xs      { font-size: var(--text-xs); }
.text-lg      { font-size: var(--text-lg); }
.font-semi    { font-weight: var(--weight-semi); }
.font-bold    { font-weight: var(--weight-bold); }
.tracking-wide { letter-spacing: var(--tracking-wide); }
.uppercase    { text-transform: uppercase; }

/* ---- Spacing utilities ---- */
.mb-2  { margin-bottom: var(--space-2); }
.mb-4  { margin-bottom: var(--space-4); }
.mb-6  { margin-bottom: var(--space-6); }
.mb-8  { margin-bottom: var(--space-8); }
.mb-12 { margin-bottom: var(--space-12); }
.mt-4  { margin-top: var(--space-4); }
.mt-8  { margin-top: var(--space-8); }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }

/* ---- Visibility ---- */
.hidden { display: none !important; }

/* ---- Animations ---- */
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 0 0 rgba(0, 191, 255, 0); }
  50%       { box-shadow: 0 0 0 8px rgba(0, 191, 255, 0.08); }
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

/* ---- Reveal animation (JS-driven) ---- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--transition-slower), transform var(--transition-slower);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 100ms; }
.reveal-delay-2 { transition-delay: 200ms; }
.reveal-delay-3 { transition-delay: 300ms; }
.reveal-delay-4 { transition-delay: 400ms; }