/* ============================================================
   Apple Design System — reskin layer for jeremyRZ.github.io
   Loaded LAST so it overrides Wowchemy defaults.
   Inspired by Apple.com: SF Pro system font, #f5f5f7 canvas,
   #0071e3 blue, frosted-glass nav, restrained motion.
   ============================================================ */

:root {
  --apple-sans: -apple-system, BlinkMacSystemFont, "SF Pro Display",
    "SF Pro Text", "Helvetica Neue", "Segoe UI", Roboto,
    "PingFang SC", "Microsoft YaHei", sans-serif;
  --apple-mono: SFMono-Regular, Menlo, Monaco, Consolas,
    "Liberation Mono", "Courier New", monospace;

  --apple-bg: #f5f5f7;
  --apple-bg-elevated: #ffffff;
  --apple-text: #1d1d1f;
  --apple-text-secondary: #6e6e73;
  --apple-text-tertiary: #86868b;
  --apple-blue: #0071e3;
  --apple-blue-hover: #0077ed;
  --apple-blue-active: #006edb;
  --apple-border: #d2d2d7;
  --apple-blue-tint: rgba(0, 113, 227, 0.1);
  --apple-nav-bg: rgba(255, 255, 255, 0.72);
  --apple-nav-border: rgba(0, 0, 0, 0.08);
  --apple-card-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);

  --apple-radius-lg: 22px;
  --apple-radius-md: 18px;
  --apple-radius-sm: 12px;
  --apple-radius-pill: 980px;
  --apple-ease: cubic-bezier(0.32, 0.72, 0, 1); /* Apple spring-ish ease */

  /* override legacy inline tokens so existing cards/badges go Apple-blue */
  --rz-accent: #0071e3;
  --rz-ink: #1d1d1f;
  --rz-muted: #6e6e73;
}

@media (prefers-color-scheme: dark) {
  :root {
    --apple-bg: #000000;
    --apple-bg-elevated: #1d1d1f;
    --apple-text: #f5f5f7;
    --apple-text-secondary: #a1a1a6;
    --apple-text-tertiary: #86868b;
    --apple-blue: #2997ff;
    --apple-blue-hover: #2997ff;
    --apple-blue-active: #2997ff;
    --apple-border: #38383a;
    --apple-blue-tint: rgba(41, 151, 255, 0.16);
    --apple-nav-bg: rgba(22, 22, 23, 0.72);
    --apple-nav-border: rgba(255, 255, 255, 0.12);
    --apple-card-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);

    --rz-ink: #f5f5f7;
    --rz-muted: #a1a1a6;
  }
}

/* ---------- Typography: uniform sans, optical tracking ---------- */
html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--apple-sans) !important;
  background-color: var(--apple-bg);
  color: var(--apple-text);
  letter-spacing: -0.011em;
  line-height: 1.5;
}

h1, h2, h3, h4, h5, h6,
.home-section h1, .home-section h2, .home-section h3,
.article-style, .article-style p,
.portrait-title h2, .portrait-title h3,
.navbar-brand, .nav-link, p, a, li,
.card-title, .card-text, .section-heading {
  font-family: var(--apple-sans) !important;
}

h1, .home-section h1 {
  font-size: clamp(2rem, 3.4vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.1;
}
h2, .home-section h2 {
  font-size: clamp(1.7rem, 2.8vw, 2.2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.12;
}
h3 {
  font-weight: 600;
  letter-spacing: -0.012em;
}

/* ---------- Links ---------- */
a {
  color: var(--apple-blue);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}
.article-style a,
.home-section a:not(.btn):not(.nav-link):not(.network-icon a) {
  color: var(--apple-blue);
}

/* ---------- Navbar: frosted-glass material ---------- */
.page-header.header--fixed {
  background: transparent !important;
}
.navbar,
.page-header.header--fixed .navbar {
  background: var(--apple-nav-bg) !important;
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--apple-nav-border) !important;
  box-shadow: none !important;
}
.navbar.is-scrolled {
  box-shadow: 0 1px 0 var(--apple-nav-border) !important;
}

/* ---------- Inline list marker: neutral Apple-blue dot (replaces bright check/star) ---------- */
ul.rz-list {
  list-style: none;
  padding-left: 0;
  margin-left: 0;
}
ul.rz-list li {
  position: relative;
  padding-left: 0;
  margin-bottom: 0.55rem;
  line-height: 1.55;
}
ul.rz-list li::before {
  content: "";
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 0.6rem;
  border-radius: 50%;
  background: var(--apple-text);
  opacity: 0.7;
  vertical-align: 0.12em;
  flex: none;
}
.navbar-brand {
  font-weight: 600 !important;
  letter-spacing: -0.012em;
  color: var(--apple-text) !important;
  font-size: 1.18rem;
}
.nav-link {
  color: var(--apple-text-secondary) !important;
  font-weight: 400;
  font-size: 0.95rem;
}
.nav-link:hover {
  color: var(--apple-text) !important;
  text-decoration: none;
}

/* ---------- Buttons: Apple pill ---------- */
.btn {
  border-radius: var(--apple-radius-pill) !important;
  font-weight: 400;
  letter-spacing: -0.01em;
  padding: 0.5rem 1.45rem;
  transition: background-color 200ms var(--apple-ease),
    border-color 200ms var(--apple-ease), color 200ms var(--apple-ease),
    transform 120ms var(--apple-ease), box-shadow 200ms var(--apple-ease) !important;
}
.btn:active {
  transform: scale(0.97);
}
.btn-primary {
  background-color: var(--apple-blue) !important;
  border-color: var(--apple-blue) !important;
  color: #fff !important;
}
.btn-primary:hover {
  background-color: var(--apple-blue-hover) !important;
  border-color: var(--apple-blue-hover) !important;
  box-shadow: 0 4px 14px rgba(0, 113, 227, 0.3);
}
.btn-outline-primary {
  background-color: transparent !important;
  border-color: var(--apple-blue) !important;
  color: var(--apple-blue) !important;
}
.btn-outline-primary:hover {
  background-color: var(--apple-blue) !important;
  border-color: var(--apple-blue) !important;
  color: #fff !important;
  box-shadow: 0 4px 14px rgba(0, 113, 227, 0.3);
}

/* ---------- Cards & publication items ---------- */
.home-publications-item,
.card,
.featured-card {
  background: var(--apple-bg-elevated) !important;
  border: 1px solid var(--apple-border) !important;
  border-radius: var(--apple-radius-md) !important;
  box-shadow: none !important;
}
.home-publications-item:hover {
  box-shadow: var(--apple-card-shadow) !important;
  transform: translateY(-3px);
  border-color: var(--apple-border) !important;
}
.home-publications-badge {
  color: var(--apple-blue) !important;
  background: var(--apple-blue-tint) !important;
  font-weight: 600;
}
.home-publications-content .pub-title {
  color: var(--apple-text);
}
.home-publications-content .pub-meta,
.home-publications-content .pub-venue {
  color: var(--apple-text-secondary);
}

/* ---------- Section rhythm: generous whitespace ---------- */
.home-section {
  padding-top: 5rem !important;
  padding-bottom: 5rem !important;
}
.home-section.wg-about {
  max-width: 1040px;
}
.page-body {
  padding-top: 2rem;
}

/* ---------- About / profile ---------- */
.avatar.avatar-circle {
  border-radius: 50%;
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.12);
}
.portrait-title h2 {
  font-size: clamp(2.2rem, 3.6vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--apple-text);
}
.portrait-title h3 {
  font-size: 1.1rem;
  font-weight: 400;
  color: var(--apple-text-secondary);
  line-height: 1.4;
}
.network-icon a {
  color: var(--apple-text-secondary);
  transition: color 180ms var(--apple-ease), transform 180ms var(--apple-ease);
}
.network-icon a:hover {
  color: var(--apple-blue);
  transform: translateY(-2px);
  text-decoration: none;
}
.article-style {
  color: var(--apple-text-secondary);
  font-size: 1.06rem;
  line-height: 1.7;
}

/* ---------- FA icons: unified Apple gray (no brand colors) ---------- */
.fa-ul .fa-li,
.article-style .fas,
.article-style .far,
.section-subheading .fas {
  color: var(--apple-text-secondary) !important;
}
.text-primary.fas,
.text-primary.far,
.text-primary.fab {
  color: var(--apple-text-secondary) !important;
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto !important;
  }
  .btn:active,
  .home-publications-item:hover,
  .network-icon a:hover {
    transform: none !important;
  }
}