/* --- Refresh: modern type, color tokens and dark mode, layered on top of main.css --- */

:root {
  --bg: #fbfaf8;
  --surface: #ffffff;
  --surface-2: #f3f1ed;
  --text: #1f2328;
  --muted: #5d6670;
  --border: #e5e2dc;
  --accent: #2f5bd3;
  --accent-hover: #1c3f9e;
  --accent-soft: rgba(47, 91, 211, 0.09);
  --code-bg: #f5f3ef;
  --shadow: 0 1px 2px rgba(20, 20, 20, 0.04), 0 4px 16px rgba(20, 20, 20, 0.05);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  --font-serif: 'Source Serif 4', Georgia, 'Times New Roman', serif;
  --font-mono: 'JetBrains Mono', SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1115;
    --surface: #161920;
    --surface-2: #1b1f27;
    --text: #e4e6ea;
    --muted: #9aa3ae;
    --border: #2a2f39;
    --accent: #8fa8ff;
    --accent-hover: #b7c7ff;
    --accent-soft: rgba(143, 168, 255, 0.12);
    --code-bg: #1b1f27;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 4px 16px rgba(0, 0, 0, 0.25);
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #0f1115;
  --surface: #161920;
  --surface-2: #1b1f27;
  --text: #e4e6ea;
  --muted: #9aa3ae;
  --border: #2a2f39;
  --accent: #8fa8ff;
  --accent-hover: #b7c7ff;
  --accent-soft: rgba(143, 168, 255, 0.12);
  --code-bg: #1b1f27;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 4px 16px rgba(0, 0, 0, 0.25);
  color-scheme: dark;
}

/* --- Base --- */

body {
  font-family: var(--font-serif);
  font-size: 19px;
  color: var(--text);
  background-color: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}
p {
  line-height: 1.65;
  margin: 22px 0;
}
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}
h2 { margin-top: 40px; }
h3 { margin-top: 32px; }
a {
  color: var(--accent);
  text-decoration: none;
  transition: color .15s ease;
}
a:hover,
a:focus {
  color: var(--accent-hover);
  text-decoration: underline;
  text-underline-offset: 3px;
}
blockquote {
  color: var(--muted);
  border-left: 3px solid var(--accent);
}
hr, hr.small {
  border-color: var(--border);
}
::selection {
  background: var(--accent-soft);
}

/* --- Navbar --- */

.navbar-custom {
  background-color: color-mix(in srgb, var(--bg) 82%, transparent);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
  font-family: var(--font-sans);
}
.navbar-custom .nav li a {
  text-transform: none;
  font-size: 15px;
  letter-spacing: 0;
}
.navbar-custom .navbar-brand,
.navbar-custom .nav li a {
  font-weight: 600;
  color: var(--text);
}
.navbar-custom .navbar-brand {
  letter-spacing: -0.01em;
}
.navbar-custom .navbar-brand:hover,
.navbar-custom .navbar-brand:focus,
.navbar-custom .nav li a:hover,
.navbar-custom .nav li a:focus {
  color: var(--accent);
  text-decoration: none;
  background: transparent;
}
.navbar-custom .avatar-container .avatar-img-border {
  box-shadow: 0 0 0 3px var(--bg), 0 4px 14px rgba(0, 0, 0, .18);
  -webkit-box-shadow: 0 0 0 3px var(--bg), 0 4px 14px rgba(0, 0, 0, .18);
}
.navbar-default .navbar-toggle {
  border-color: var(--border);
}
.navbar-default .navbar-toggle .icon-bar {
  background-color: var(--text);
}
.navbar-default .navbar-collapse {
  border-color: var(--border);
}

.theme-toggle {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text);
  width: 34px;
  height: 34px;
  margin: 8px 15px 8px 12px;
  padding: 0;
  font-size: 15px;
  line-height: 32px;
  cursor: pointer;
  transition: border-color .15s ease, color .15s ease, transform .2s ease;
}
.theme-toggle:hover,
.theme-toggle:focus-visible {
  color: var(--accent);
  border-color: var(--accent);
  transform: rotate(-15deg);
  outline: none;
}
.theme-toggle .fa-sun-o { display: none; }
:root[data-theme="dark"] .theme-toggle .fa-sun-o { display: inline; }
:root[data-theme="dark"] .theme-toggle .fa-moon-o { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .fa-sun-o { display: inline; }
  :root:not([data-theme="light"]) .theme-toggle .fa-moon-o { display: none; }
}
@media only screen and (max-width: 767px) {
  .theme-toggle { margin: 4px 15px 12px; }
}

/* --- Page headers --- */

.intro-header .page-heading h1,
.intro-header .post-heading h1 {
  font-weight: 800;
  letter-spacing: -0.035em;
}
.intro-header .page-heading .page-subheading,
.intro-header .post-heading .post-subheading {
  font-family: var(--font-sans);
  font-weight: 400;
  color: var(--muted);
}
.intro-header .page-heading hr.small {
  border-color: var(--accent);
  opacity: .7;
}
.post-heading .post-meta,
.post-preview .post-meta,
.text-muted {
  color: var(--muted);
  font-family: var(--font-sans);
  font-size: 15px;
}

/* --- Blog list --- */

.post-preview {
  border-bottom: 1px solid var(--border);
}
.post-preview a,
.post-preview a:hover {
  color: var(--text);
  text-decoration: none;
}
.post-preview a:hover .post-title {
  color: var(--accent);
}
/* Match the compact "Writing at Ramp" list: serif link-colored titles, small sans meta */
.posts-list .post-preview,
.posts-list .post-preview:last-child {
  padding: 12px 0;
}
.posts-list .post-preview .post-title {
  font-family: var(--font-serif);
  font-size: 19px;
  font-weight: 400;
  line-height: 1.45;
  letter-spacing: 0;
  color: var(--accent);
  margin: 0;
  transition: color .15s ease;
}
.posts-list .post-preview a:hover .post-title {
  color: var(--accent-hover);
  text-decoration: underline;
}
.posts-list .post-preview .post-subtitle {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 400;
  line-height: 1.45;
  color: var(--muted);
  margin: 2px 0 0;
}
.posts-list .post-preview .post-meta {
  font-size: 14px;
  font-style: normal;
  line-height: 1.45;
  margin: 2px 0 0;
}
.posts-list .post-preview .blog-tags {
  font-size: 13px;
  margin-top: 4px;
}
.blog-tags,
.blog-tags a {
  color: var(--muted);
  font-family: var(--font-sans);
}
.blog-tags a {
  background: var(--surface-2);
  border-radius: 999px;
  padding: 2px 10px;
}
.blog-tags a:hover {
  background: var(--accent-soft);
  color: var(--accent);
  text-decoration: none;
}
.pager li a {
  background-color: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  font-family: var(--font-sans);
  border-radius: 999px;
}
.pager li a:hover,
.pager li a:focus {
  background-color: var(--accent);
  border-color: var(--accent);
  color: var(--bg);
}

/* --- Content --- */

img, iframe {
  border-radius: 8px;
}
table tr {
  border-top: 1px solid var(--border);
  background-color: var(--surface);
}
table tr:nth-child(2n) {
  background-color: var(--surface-2);
}
table tr th,
table tr td {
  border: 1px solid var(--border);
}
code {
  font-family: var(--font-mono);
  font-size: .85em;
  color: var(--text);
  background: var(--code-bg);
  border-radius: 4px;
  padding: .1em .35em;
}
pre,
.highlight pre,
.highlight > pre {
  font-family: var(--font-mono);
  font-size: 14px;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 8px;
  color: var(--text);
}
pre code {
  background: transparent;
  padding: 0;
}
/* Dark syntax colors (pygments token classes) */
:root[data-theme="dark"] .highlight .c, .highlight .c1, .highlight .cm, .highlight .cs, .highlight .ch, .highlight .cp { color: #8b949e; }
:root[data-theme="dark"] .highlight .k, .highlight .kd, .highlight .kn, .highlight .kp, .highlight .kr, .highlight .kc, .highlight .ow { color: #ff7b72; font-weight: 400; }
:root[data-theme="dark"] .highlight .s, .highlight .s1, .highlight .s2, .highlight .sb, .highlight .sd, .highlight .se, .highlight .si, .highlight .sx, .highlight .sa, .highlight .sc { color: #a5d6ff; }
:root[data-theme="dark"] .highlight .nc, .highlight .nf, .highlight .fm, .highlight .ne { color: #d2a8ff; font-weight: 400; }
:root[data-theme="dark"] .highlight .nb, .highlight .bp, .highlight .nn, .highlight .nd { color: #ffa657; }
:root[data-theme="dark"] .highlight .m, .highlight .mi, .highlight .mf, .highlight .mh, .highlight .il, .highlight .kt { color: #79c0ff; }
:root[data-theme="dark"] .highlight .n, .highlight .nv, .highlight .vi, .highlight .p, .highlight .o, .highlight .w { color: #e6edf3; }
:root[data-theme="dark"] .highlight .err { color: #ffa198; background: transparent; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .highlight .c, .highlight .c1, .highlight .cm, .highlight .cs, .highlight .ch, .highlight .cp { color: #8b949e; }
  :root:not([data-theme="light"]) .highlight .k, .highlight .kd, .highlight .kn, .highlight .kp, .highlight .kr, .highlight .kc, .highlight .ow { color: #ff7b72; font-weight: 400; }
  :root:not([data-theme="light"]) .highlight .s, .highlight .s1, .highlight .s2, .highlight .sb, .highlight .sd, .highlight .se, .highlight .si, .highlight .sx, .highlight .sa, .highlight .sc { color: #a5d6ff; }
  :root:not([data-theme="light"]) .highlight .nc, .highlight .nf, .highlight .fm, .highlight .ne { color: #d2a8ff; font-weight: 400; }
  :root:not([data-theme="light"]) .highlight .nb, .highlight .bp, .highlight .nn, .highlight .nd { color: #ffa657; }
  :root:not([data-theme="light"]) .highlight .m, .highlight .mi, .highlight .mf, .highlight .mh, .highlight .il, .highlight .kt { color: #79c0ff; }
  :root:not([data-theme="light"]) .highlight .n, .highlight .nv, .highlight .vi, .highlight .p, .highlight .o, .highlight .w { color: #e6edf3; }
  :root:not([data-theme="light"]) .highlight .err { color: #ffa198; background: transparent; }
}
.box-note, .box-warning, .box-error, .box-success {
  color: #1f2328;
  border-radius: 8px;
}

/* --- Footer --- */

footer {
  background-color: var(--surface-2);
  border-top: 1px solid var(--border);
  font-family: var(--font-sans);
}
footer a {
  color: var(--muted);
}
footer a:hover,
footer a:focus {
  color: var(--accent);
}
footer .fa-stack .fa-circle {
  color: var(--text);
}
footer .fa-stack .fa-inverse {
  color: var(--surface-2);
}
footer .copyright,
footer .theme-by {
  color: var(--muted);
}

/* --- Writing at Ramp (blog index) --- */

.external-writing {
  list-style: none;
  padding: 0;
  margin: 0 0 12px;
}
.external-writing li {
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  line-height: 1.45;
}
.external-writing li:last-child {
  border-bottom: none;
}
.external-writing .meta {
  display: block;
  margin-top: 2px;
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--muted);
}

/* --- Speaking --- */

.speaking-intro {
  color: var(--muted);
  font-size: 18px;
  margin: 8px 0 24px;
}
.speaking-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 8px;
  font-family: var(--font-sans);
}
.speaking-filters button {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all .15s ease;
}
.speaking-filters button:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.speaking-filters button[aria-pressed="true"] {
  background: var(--text);
  border-color: var(--text);
  color: var(--bg);
}
.speaking-filters .count {
  opacity: .6;
  margin-left: 4px;
  font-weight: 400;
}
.speaking-year {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 36px 0 12px;
}
.speaking-year[hidden],
.talk-card[hidden] {
  display: none;
}
.talk-card {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 18px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
  margin-bottom: 14px;
  box-shadow: var(--shadow);
  transition: transform .2s ease, border-color .2s ease;
}
.talk-card:hover {
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--accent) 40%, var(--border));
}
.talk-logo {
  width: 64px;
  height: 64px;
  border-radius: 12px;
  background: #fff;
  border: 1px solid var(--border);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.talk-logo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 0;
}
.talk-logo.contain img {
  object-fit: contain;
  padding: 8px;
}
.talk-body {
  min-width: 0;
}
.talk-meta {
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 10px;
}
.talk-type {
  font-weight: 600;
  font-size: 11px;
  letter-spacing: .06em;
  text-transform: uppercase;
  padding: 3px 9px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
}
.talk-type.podcast { background: rgba(214, 120, 30, .12); color: #b85f0c; }
.talk-type.keynote { background: rgba(170, 60, 190, .12); color: #9333a8; }
.talk-type.fireside { background: rgba(20, 150, 110, .12); color: #0e8a63; }
:root[data-theme="dark"] .talk-type.podcast { color: #f2a65a; }
:root[data-theme="dark"] .talk-type.keynote { color: #d48ae6; }
:root[data-theme="dark"] .talk-type.fireside { color: #4fd1a5; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .talk-type.podcast { color: #f2a65a; }
  :root:not([data-theme="light"]) .talk-type.keynote { color: #d48ae6; }
  :root:not([data-theme="light"]) .talk-type.fireside { color: #4fd1a5; }
}
.talk-title {
  font-family: var(--font-sans);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.015em;
  margin: 8px 0 4px;
}
.talk-title a {
  color: var(--text);
}
.talk-title a:hover {
  color: var(--accent);
}
.talk-venue {
  font-family: var(--font-sans);
  font-size: 15px;
  color: var(--muted);
  margin: 0;
}
.talk-card audio {
  width: 100%;
  margin-top: 14px;
  height: 40px;
}
.talk-video {
  position: relative;
  margin-top: 14px;
  aspect-ratio: 16 / 9;
  border-radius: 10px;
  overflow: hidden;
  background: #000;
}
.talk-video button {
  position: absolute;
  inset: 0;
  width: 100%;
  border: 0;
  padding: 0;
  cursor: pointer;
  background: #000 center / cover no-repeat;
}
.talk-video button::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,.45), rgba(0,0,0,0) 60%);
  transition: background .2s ease;
}
.talk-video button:hover::before {
  background: linear-gradient(to top, rgba(0,0,0,.3), rgba(0,0,0,0) 60%);
}
.talk-video .play {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 68px;
  height: 48px;
  margin: -24px 0 0 -34px;
  border-radius: 12px;
  background: rgba(20, 20, 20, .8);
  color: #fff;
  font-size: 22px;
  line-height: 48px;
  text-align: center;
  transition: background .2s ease, transform .2s ease;
}
.talk-video button:hover .play {
  background: #e62117;
  transform: scale(1.06);
}
.talk-video iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
  border-radius: 0;
}
@media only screen and (max-width: 520px) {
  .talk-card {
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 16px;
  }
  .talk-logo {
    width: 48px;
    height: 48px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .talk-card, .theme-toggle, .talk-video .play { transition: none; }
  .talk-card:hover { transform: none; }
}

/* Inline SVG icons in footer (e.g. X, which Font Awesome 4 lacks) */
.footer-links .svg-icon { width: 0.85em; height: 0.85em; vertical-align: -0.08em; }