/* ============================================
   Evaluation Context — Design System
   A refined, editorial tech-blog aesthetic.
   Hot-pink palette · JetBrains Mono code ·
   IBM Plex Sans body · Cinematic micro-interactions
   ============================================ */

/* ---------- Google Fonts ---------- */
@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;1,300;1,400&family=JetBrains+Mono:wght@300;400;500&family=Space+Grotesk:wght@400;500;600;700&display=swap');

/* ---------- Design tokens ---------- */
:root {
  /* Brand palette — hot pink */
  --ec-teal:          #ec4899;
  --ec-teal-dark:     #db2777;
  --ec-teal-light:    #f472b6;
  --ec-teal-ghost:    rgba(236, 72, 153, 0.08);
  --ec-ocean:         #831843;
  --ec-navy:          #0c1222;
  --ec-mint:          #fbcfe8;
  --ec-coral:         #fb7185;
  --ec-amber:         #fbbf24;
  --ec-surface-glass: rgba(255, 255, 255, 0.55);
  --ec-border-subtle: rgba(0, 0, 0, 0.06);
  
  /* Typography */
  --ec-font-body:    'IBM Plex Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --ec-font-display: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
  --ec-font-mono:    'JetBrains Mono', 'Fira Code', monospace;
  
  /* Spacing rhythm */
  --ec-space-xs: 0.25rem;
  --ec-space-sm: 0.5rem;
  --ec-space-md: 1rem;
  --ec-space-lg: 2rem;
  --ec-space-xl: 3rem;
  --ec-space-2xl: 5rem;
  
  /* Motion */
  --ec-ease-out:    cubic-bezier(0.16, 1, 0.3, 1);
  --ec-ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ec-duration:    0.4s;
  
  /* Elevation */
  --ec-shadow-sm:  0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --ec-shadow-md:  0 4px 12px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.04);
  --ec-shadow-lg:  0 12px 40px rgba(0,0,0,0.10), 0 4px 12px rgba(0,0,0,0.06);
  --ec-shadow-glow: 0 0 30px rgba(236, 72, 153, 0.15);
}

/* Dark mode tokens */
[data-md-color-scheme="slate"] {
  --ec-surface-glass: rgba(15, 23, 42, 0.65);
  --ec-border-subtle: rgba(255, 255, 255, 0.06);
  --ec-shadow-sm:  0 1px 3px rgba(0,0,0,0.25);
  --ec-shadow-md:  0 4px 12px rgba(0,0,0,0.30);
  --ec-shadow-lg:  0 12px 40px rgba(0,0,0,0.40);
  --ec-shadow-glow: 0 0 40px rgba(249, 168, 212, 0.10);
}

/* ---------- Global typography override ---------- */
:root {
  --md-text-font: "IBM Plex Sans";
  --md-code-font: "JetBrains Mono";
}

body, .md-typeset {
  font-family: var(--ec-font-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

code, pre, .md-typeset code, .md-typeset pre {
  font-family: var(--ec-font-mono);
}

/* ---------- Header refinement ---------- */
.md-header {
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  background: var(--ec-surface-glass) !important;
  border-bottom: 1px solid var(--ec-border-subtle);
  transition: background var(--ec-duration) var(--ec-ease-out),
              box-shadow var(--ec-duration) var(--ec-ease-out);
}

[data-md-color-scheme="default"] .md-header {
  background: rgba(255, 255, 255, 0.65) !important;
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
}

[data-md-color-scheme="default"] .md-header .md-header__title,
[data-md-color-scheme="default"] .md-header .md-header__topic,
[data-md-color-scheme="default"] .md-header .md-header__title .md-ellipsis {
  color: #1a1a2e !important;
}

[data-md-color-scheme="default"] .md-header .md-header__button,
[data-md-color-scheme="default"] .md-header .md-search__icon {
  color: #1a1a2e !important;
}

[data-md-color-scheme="default"] .md-header .md-source,
[data-md-color-scheme="default"] .md-header .md-source__icon svg,
[data-md-color-scheme="default"] .md-header .md-source__repository {
  color: #1a1a2e !important;
  fill: currentColor;
}

[data-md-color-scheme="default"] .md-header .md-header__button:hover {
  opacity: 0.7;
}

[data-md-color-scheme="slate"] .md-header {
  background: rgba(0, 0, 0, 0.65) !important;
}

.md-header[data-md-state="shadow"] {
  box-shadow: var(--ec-shadow-md);
}

/* Header title — match nav tab style */
.md-header__title {
  font-weight: 400;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  font-size: 0.78rem;
}

/* Header logo — circular avatar */
.md-header .md-logo img {
  border-radius: 50% !important;
}

/* Navigation tabs — refined underline animation */
.md-tabs {
  border-bottom: 1px solid var(--ec-border-subtle);
}

.md-tabs__link {
  font-size: 0.78rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  opacity: 0.7;
  transition: opacity var(--ec-duration) var(--ec-ease-out),
              color var(--ec-duration) var(--ec-ease-out);
  position: relative;
}

.md-tabs__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--ec-teal);
  transition: width var(--ec-duration) var(--ec-ease-spring),
              left var(--ec-duration) var(--ec-ease-spring);
  border-radius: 1px;
}

.md-tabs__link:hover,
.md-tabs__link--active {
  opacity: 1;
}

.md-tabs__link:hover::after,
.md-tabs__link--active::after {
  width: 100%;
  left: 0;
}

/* Light mode — ensure tab and header text is dark */
[data-md-color-scheme="default"] .md-tabs {
  background: rgba(255, 255, 255, 1);
}

[data-md-color-scheme="default"] .md-tabs__link {
  color: #1a1a2e !important;
}

/* ---------- Content area refinements ---------- */

/* Slightly wider reading measure */
.md-content__inner {
  max-width: 52rem;
}

/* Article typography */
.md-typeset {
  line-height: 1.7;
}

/* Display headings with serif accent */
.md-typeset h1 {
  font-family: var(--ec-font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.md-typeset h2 {
  font-weight: 500;
  letter-spacing: -0.015em;
  margin-top: 2.5rem;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--ec-border-subtle);
}

/* Accent bar on h2 */
.md-typeset h2::before {
  content: '';
  display: inline-block;
  width: 3px;
  height: 0.85em;
  background: var(--ec-teal);
  border-radius: 2px;
  margin-right: 0.6rem;
  vertical-align: middle;
  position: relative;
  top: -0.05em;
}

.md-typeset h3 {
  font-weight: 500;
  letter-spacing: -0.01em;
}

/* Links — teal with underline animation */
.md-typeset a:not(.md-button):not(.md-nav__link):not(.md-post__link):not(.headerlink):not(.md-author):not(.glightbox) {
  color: var(--ec-teal-dark);
  text-decoration: none;
  background-image: linear-gradient(var(--ec-teal-light), var(--ec-teal-light));
  background-size: 0 1px;
  background-position: 0 100%;
  background-repeat: no-repeat;
  transition: background-size 0.3s var(--ec-ease-out),
              color 0.2s var(--ec-ease-out);
}

.md-typeset a:not(.md-button):not(.md-nav__link):not(.md-post__link):not(.headerlink):not(.md-author):not(.glightbox):hover {
  color: var(--ec-teal);
  background-size: 100% 1px;
}

[data-md-color-scheme="slate"] .md-typeset a:not(.md-button):not(.md-nav__link):not(.md-post__link):not(.headerlink):not(.md-author):not(.glightbox) {
  color: var(--ec-teal-light);
}

/* ---------- Code blocks - refined ---------- */
.md-typeset pre {
  border-radius: 0.6rem;
  border: 1px solid var(--ec-border-subtle);
  box-shadow: var(--ec-shadow-sm);
}

.md-typeset code {
  border-radius: 0.3rem;
  font-size: 0.82em;
  padding: 0.15em 0.4em;
}

/* ---------- Admonitions - refined ---------- */
.md-typeset .admonition,
.md-typeset details {
  border-radius: 0.5rem;
  border-left-width: 3px;
  box-shadow: var(--ec-shadow-sm);
  overflow: hidden;
}

.md-typeset .admonition pre,
.md-typeset details pre {
  overflow-x: auto;
  max-width: 100%;
}

.md-typeset .admonition .highlight,
.md-typeset details .highlight {
  overflow-x: auto;
  max-width: 100%;
}

/* ---------- Tables ---------- */
.md-typeset table:not([class]) {
  border-radius: 0.5rem;
  overflow: hidden;
  box-shadow: var(--ec-shadow-sm);
  border: 1px solid var(--ec-border-subtle);
}

.md-typeset table:not([class]) th {
  font-weight: 600;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.md-typeset table:not([class]) td {
  font-size: 0.82rem;
}

/* ---------- Scroll reveal animation ---------- */
.ec-reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--ec-ease-out),
              transform 0.6s var(--ec-ease-out);
}

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

/* Staggered children */
.ec-reveal-stagger > * {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s var(--ec-ease-out),
              transform 0.5s var(--ec-ease-out);
}

.ec-reveal-stagger.ec-visible > *:nth-child(1) { transition-delay: 0s; }
.ec-reveal-stagger.ec-visible > *:nth-child(2) { transition-delay: 0.06s; }
.ec-reveal-stagger.ec-visible > *:nth-child(3) { transition-delay: 0.12s; }
.ec-reveal-stagger.ec-visible > *:nth-child(4) { transition-delay: 0.06s; }
.ec-reveal-stagger.ec-visible > *:nth-child(5) { transition-delay: 0.12s; }
.ec-reveal-stagger.ec-visible > *:nth-child(6) { transition-delay: 0.18s; }

.ec-reveal-stagger.ec-visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Footer refinement ---------- */
.md-footer {
  border-top: 1px solid var(--ec-border-subtle);
}

.md-footer-meta {
  font-size: 0.78rem;
}

/* ---------- Selection color ---------- */
::selection {
  background: rgba(236, 72, 153, 0.2);
  color: inherit;
}

/* ---------- Scrollbar refinement (Webkit) ---------- */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(236, 72, 153, 0.25);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(236, 72, 153, 0.45);
}

/* ---------- Reading progress bar ---------- */
.ec-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: linear-gradient(90deg, var(--ec-teal), var(--ec-teal-light));
  z-index: 999;
  transition: width 0.1s linear;
  pointer-events: none;
}

/* ---------- Grid cards polish ---------- */
.md-typeset .grid.cards > ul > li,
.md-typeset .grid.cards > ol > li {
  border-radius: 0.6rem;
  border: 1px solid var(--ec-border-subtle);
  box-shadow: var(--ec-shadow-sm);
  transition: transform var(--ec-duration) var(--ec-ease-spring),
              box-shadow var(--ec-duration) var(--ec-ease-out);
  will-change: transform;
}

.md-typeset .grid.cards > ul > li:hover,
.md-typeset .grid.cards > ol > li:hover {
  box-shadow: var(--ec-shadow-lg), var(--ec-shadow-glow);
}

/* ---------- Smooth page transitions ---------- */
.md-content {
  animation: ec-fadeIn 0.4s var(--ec-ease-out);
}

@keyframes ec-fadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- Keyboard-accessible focus rings ---------- */
.ec-keyboard *:focus-visible {
  outline: 2px solid var(--ec-teal) !important;
  outline-offset: 2px !important;
  border-radius: 3px;
}

.ec-pointer *:focus {
  outline: none;
}

/* ---------- Search dialog polish ---------- */
.md-search__form {
  border-radius: 0.5rem;
  overflow: hidden;
}

.md-search-result__link {
  border-radius: 0.4rem;
  transition: background 0.15s ease-out;
}

/* ---------- Announcement bar ---------- */
.md-banner {
  font-size: 0.78rem;
  letter-spacing: 0.01em;
}

/* ---------- Table of Contents indicator ---------- */
.md-nav__link--active {
  position: relative;
}

.md-nav--secondary .md-nav__link--active::before {
  content: '';
  position: absolute;
  left: -0.5rem;
  top: 0.15rem;
  bottom: 0.15rem;
  width: 2px;
  background: var(--ec-teal);
  border-radius: 1px;
}

/* ---------- Admonition titles — tighter ---------- */
.md-typeset .admonition-title,
.md-typeset details > summary {
  font-weight: 600;
  font-size: 0.78rem;
  letter-spacing: 0.01em;
}

/* ---------- Pagination polish ---------- */
.md-typeset .md-pagination {
  gap: 0.25rem;
}

.md-typeset .md-pagination a {
  border-radius: 0.4rem;
  transition: background 0.2s ease-out, color 0.2s ease-out;
}

.md-typeset .md-pagination a:hover {
  background: var(--ec-teal-ghost);
  color: var(--ec-teal);
}

/* ---------- Dialog / Cookie consent polish ---------- */
.md-consent__inner {
  border-radius: 0.75rem;
  box-shadow: var(--ec-shadow-lg);
}

/* ---------- Social links — hover glow ---------- */
.md-social__link {
  transition: transform 0.2s var(--ec-ease-spring),
              opacity 0.2s ease-out;
}

.md-social__link:hover {
  transform: translateY(-2px);
  opacity: 1 !important;
}

/* ---------- Content tabs — hot pink active indicator ---------- */
.md-typeset .tabbed-labels > label.tabbed-alternate[aria-selected="true"],
.md-typeset .tabbed-labels > label[checked] {
  border-bottom-color: var(--ec-teal) !important;
  color: var(--ec-teal) !important;
}

.md-typeset .tabbed-set > input:checked + label {
  border-bottom-color: var(--ec-teal) !important;
  color: var(--ec-teal) !important;
}

/* ---------- Related links sidebar — underline animation ---------- */
.md-sidebar--post .md-post__meta a.md-nav__link {
  text-decoration: none;
  background-image: linear-gradient(var(--ec-teal-light), var(--ec-teal-light)) !important;
  background-size: 0 1px !important;
  background-position: 0 100% !important;
  background-repeat: no-repeat !important;
  transition: background-size 0.3s var(--ec-ease-out),
              color 0.2s var(--ec-ease-out) !important;
}

.md-sidebar--post .md-post__meta a.md-nav__link:hover {
  background-size: 100% 1px !important;
  color: var(--ec-teal) !important;
}

/* ---------- Print cleanup ---------- */
@media print {
  .ec-progress,
  .hero-banner {
    display: none !important;
  }
}