/* ---------------------------------------------------------------------------
   modern.css — layered refinement on top of each page's existing inline styles.
   Loaded last so it wins on the few properties it touches. Deliberately
   additive: no layout is restructured here, only depth, rhythm and motion.
--------------------------------------------------------------------------- */

:root {
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.4, 0.64, 1);
  --dur-fast: 180ms;
  --dur-base: 320ms;
  --dur-slow: 620ms;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.16), 0 2px 8px rgba(0, 0, 0, 0.10);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.18), 0 12px 32px rgba(0, 0, 0, 0.14);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.22), 0 24px 64px rgba(0, 0, 0, 0.18);
}

body.light-mode {
  --shadow-sm: 0 1px 2px rgba(42, 16, 54, 0.05), 0 2px 8px rgba(42, 16, 54, 0.05);
  --shadow-md: 0 4px 12px rgba(42, 16, 54, 0.07), 0 12px 32px rgba(42, 16, 54, 0.07);
  --shadow-lg: 0 8px 24px rgba(42, 16, 54, 0.09), 0 24px 64px rgba(42, 16, 54, 0.09);
}

/* --- Typography -------------------------------------------------------- */

body {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, .section-title {
  text-wrap: balance;
  letter-spacing: -0.02em;
}

p, li {
  text-wrap: pretty;
}

::selection {
  background: rgba(var(--accent-rgb), 0.22);
  color: var(--text);
}

/* --- Focus visibility --------------------------------------------------- */

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 6px;
}

/* --- Scroll reveal ------------------------------------------------------ */

[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity var(--dur-slow) var(--ease-out-expo),
    transform var(--dur-slow) var(--ease-out-expo);
  transition-delay: var(--reveal-delay, 0ms);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* --- Cards -------------------------------------------------------------- */

.project-card,
.blog-card {
  border-radius: 16px;
  box-shadow: var(--shadow-sm);
  /* Includes opacity so the reveal fade still runs; the shorthand would
     otherwise reset transition-delay, so the stagger is restated below. */
  transition:
    opacity var(--dur-slow) var(--ease-out-expo),
    transform var(--dur-base) var(--ease-out-expo),
    box-shadow var(--dur-base) var(--ease-out-expo),
    border-color var(--dur-base) var(--ease-out-expo);
  transition-delay: var(--reveal-delay, 0ms);
}

.project-card:hover,
.blog-card:hover {
  /* Reveal stagger must not delay the hover response. */
  transition-delay: 0ms;
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(var(--accent-rgb), 0.45);
}

.project-card:active,
.blog-card:active {
  transform: translateY(-1px);
  transition-duration: var(--dur-fast);
}

/* Accent hairline that wipes in on hover. */
.blog-card {
  position: relative;
  overflow: hidden;
}

.blog-card::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur-slow) var(--ease-out-expo);
}

.blog-card:hover::after {
  transform: scaleX(1);
}

.tag {
  transition:
    background-color var(--dur-fast) ease,
    border-color var(--dur-fast) ease,
    transform var(--dur-fast) var(--ease-spring);
}

.blog-card:hover .tag,
.article-header .tag:hover {
  border-color: rgba(var(--accent-rgb), 0.45);
}

/* --- Article reading experience ----------------------------------------- */

.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 100%;
  transform: scaleX(0);
  transform-origin: left center;
  background: linear-gradient(90deg, var(--accent), rgba(var(--accent-rgb), 0.35));
  z-index: 10000;
  pointer-events: none;
}

.article-container {
  max-width: 46rem;
}

.article-header h1 {
  font-size: clamp(2rem, 1.4rem + 2.2vw, 3rem);
  line-height: 1.15;
}

.article-header {
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--card-border);
  margin-bottom: 2.5rem;
}

.article-meta {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.article-content > p:first-of-type {
  font-size: 1.15rem;
  line-height: 1.7;
  color: var(--text);
}

.article-content h2 {
  margin-top: 3.25rem;
  font-size: 1.375rem;
  letter-spacing: -0.015em;
}

.article-content p,
.article-content li {
  font-size: 1.0625rem;
  line-height: 1.75;
}

.article-content table tbody tr {
  transition: background-color var(--dur-fast) ease;
}

.article-content table tbody tr:hover {
  background: rgba(var(--accent-rgb), 0.05);
}

.code-block,
.flowchart {
  box-shadow: var(--shadow-sm);
}

.flow-box {
  transition: transform var(--dur-base) var(--ease-spring),
              box-shadow var(--dur-base) var(--ease-out-expo);
}

.flow-box:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: var(--shadow-sm);
}

.back-link {
  transition: transform var(--dur-base) var(--ease-out-expo), opacity var(--dur-fast) ease;
}

.back-link:hover {
  transform: translateX(-4px);
}

.theme-btn {
  box-shadow: var(--shadow-md);
}

/* --- Reduced motion ----------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .reading-progress {
    display: none;
  }

  .project-card:hover,
  .blog-card:hover,
  .flow-box:hover,
  .back-link:hover {
    transform: none;
  }
}