/* Filip Zajíc Portfolio
   Warm editorial. Cream background, warm ink, rust accent.
   System font stack so nothing has to load. */

:root {
  --max-width: 640px;
  --color-bg: #ffffff;
  --color-text: #1f1813;
  --color-muted: #7a6f60;
  --color-faint: #c4b9a5;
  --color-link: #1f1813;
  --color-link-hover: #b85c1e;
  --color-rule: #ddd3bf;
  --color-accent: #b85c1e;
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;
  --space-6: 6rem;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI",
    Roboto, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  font-weight: 400;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-5) var(--space-3);
}

@media (min-width: 720px) {
  .container {
    padding: var(--space-6) var(--space-3);
  }
}

/* Typography */
h1 {
  font-size: 2.125rem;
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.1;
  margin-bottom: var(--space-2);
}

@media (min-width: 720px) {
  h1 {
    font-size: 2.75rem;
  }
}

h2 {
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: -0.005em;
  line-height: 1.35;
  margin-top: var(--space-4);
  margin-bottom: var(--space-2);
}

h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-top: var(--space-3);
  margin-bottom: var(--space-1);
}

p {
  margin-bottom: var(--space-2);
  color: var(--color-text);
}

p.muted,
.muted {
  color: var(--color-muted);
}

p.faint,
.faint {
  color: var(--color-faint);
  font-size: 0.875rem;
}

a {
  color: var(--color-link);
  text-decoration: underline;
  text-decoration-color: var(--color-accent);
  text-underline-offset: 3px;
  transition: text-decoration-color 0.15s ease, color 0.15s ease;
}

a:hover {
  text-decoration-color: var(--color-accent);
  color: var(--color-link-hover);
}

ul {
  margin-bottom: var(--space-2);
  padding-left: var(--space-3);
}

li {
  margin-bottom: var(--space-1);
}

blockquote {
  border-left: 2px solid var(--color-rule);
  padding-left: var(--space-2);
  margin: var(--space-3) 0;
  color: var(--color-muted);
}

hr {
  border: none;
  border-top: 1px solid var(--color-rule);
  margin: var(--space-4) 0;
}

/* Header */
.site-header {
  margin-bottom: var(--space-4);
}

.site-name {
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: -0.005em;
}

/* Bio / hero */
.bio {
  margin-bottom: var(--space-5);
}

.bio p {
  font-size: 1.0625rem;
  line-height: 1.65;
}

.bio-cta {
  margin-top: var(--space-3);
}

.button {
  display: inline-block;
  padding: 0.7rem 1.3rem;
  border: 1px solid #c2bdb3;
  border-radius: 6px;
  font-size: 0.9375rem;
  font-weight: 500;
  text-decoration: none;
  color: #4a6b8a;
  background: transparent;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.button:hover {
  border-color: #4a6b8a;
  background: rgba(74, 107, 138, 0.06);
}

/* Project list */
.projects {
  margin-bottom: var(--space-5);
}

.projects-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: var(--space-3);
}

.project {
  padding: var(--space-3) 0;
  border-top: 1px solid var(--color-rule);
}

.project:last-child {
  border-bottom: 1px solid var(--color-rule);
}

.project-title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
}

.project-title h2 {
  margin: 0;
  font-size: 1.0625rem;
}

.project-meta {
  font-size: 0.8125rem;
  color: var(--color-muted);
  white-space: nowrap;
}

.project-blurb {
  color: var(--color-muted);
  font-size: 0.9375rem;
  line-height: 1.5;
}

.project a.project-link {
  text-decoration: none;
  color: inherit;
  display: block;
}

.project a.project-link:hover h2 {
  text-decoration: underline;
  text-decoration-color: var(--color-text);
  text-underline-offset: 3px;
}

.project.coming-soon {
  opacity: 0.55;
}

.project.coming-soon .project-meta {
  color: var(--color-faint);
  font-style: italic;
}

/* Quotes / recommendations */
.quotes {
  margin-bottom: var(--space-5);
}

.quotes-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: var(--space-3);
}

.quote-card {
  border: 1px solid var(--color-rule);
  border-radius: 6px;
  background: transparent;
  margin-bottom: var(--space-2);
  transition: border-color 0.15s ease, background 0.15s ease;
  overflow: hidden;
}

.quote-card:hover {
  border-color: var(--color-faint);
}

.quote-card:hover {
  background: rgba(0, 0, 0, 0.02);
}

/* Hide the default disclosure marker */
.quote-card > summary::-webkit-details-marker {
  display: none;
}

.quote-card > summary::marker {
  content: "";
}

.quote-card > summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-3);
}

.quote-card > summary .avatar {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
  margin-top: 2px;
  border: 1px solid var(--color-rule);
}

.quote-card > summary .summary-content {
  flex: 1;
  min-width: 0;
}

.quote-card > summary .pull {
  display: block;
  font-size: 1rem;
  line-height: 1.55;
  color: var(--color-text);
  margin-bottom: var(--space-1);
  font-weight: 500;
}

.quote-card > summary .attribution {
  display: block;
  font-size: 0.8125rem;
  color: var(--color-muted);
  line-height: 1.5;
}

.quote-card > summary .attribution strong {
  color: var(--color-text);
  font-weight: 600;
}

.quote-card > summary .expand-icon {
  flex-shrink: 0;
  font-size: 1.25rem;
  line-height: 1;
  color: var(--color-faint);
  font-weight: 300;
  margin-top: 2px;
  transition: transform 0.2s ease, color 0.15s ease;
  user-select: none;
}

.quote-card:hover > summary .expand-icon {
  color: var(--color-accent);
}

.quote-card[open] > summary .expand-icon {
  transform: rotate(45deg);
  color: var(--color-accent);
}

.quote-body {
  padding: 0 var(--space-3) var(--space-3);
  border-top: 1px solid var(--color-rule);
  padding-top: var(--space-3);
}

.quote-body blockquote {
  border-left: none;
  padding-left: 0;
  margin: 0 0 var(--space-2);
  color: var(--color-text);
}

.quote-body blockquote p {
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.quote-body blockquote p:last-child {
  margin-bottom: 0;
}

.quote-link {
  font-size: 0.8125rem;
  color: var(--color-muted);
  margin-top: var(--space-2);
}

/* Footer */
.site-footer {
  margin-top: var(--space-5);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-rule);
  font-size: 0.875rem;
  color: var(--color-muted);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-2);
}

.site-footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.site-footer a {
  color: var(--color-muted);
}

/* Project page specifics */
.back-link {
  display: inline-block;
  font-size: 0.875rem;
  color: var(--color-muted);
  margin-bottom: var(--space-3);
  text-decoration: none;
}

.back-link:hover {
  color: var(--color-text);
}

.project-page-meta {
  font-size: 0.8125rem;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-1);
}

.project-page-lede {
  font-size: 1.0625rem;
  color: var(--color-muted);
  margin-bottom: var(--space-4);
  line-height: 1.55;
}

.stages {
  background: transparent;
  border: 1px solid var(--color-rule);
  border-radius: 4px;
  padding: var(--space-3);
  margin: var(--space-3) 0;
}

.stages h3 {
  margin-top: 0;
  font-size: 0.9375rem;
}

.stages p {
  margin-bottom: var(--space-2);
  font-size: 0.9375rem;
  line-height: 1.55;
}

.stages p:last-child {
  margin-bottom: 0;
}

.credits {
  margin-top: var(--space-4);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-rule);
  font-size: 0.875rem;
  color: var(--color-muted);
  line-height: 1.55;
}

/* ASCII diagram blocks */
.ascii {
  font-family: ui-monospace, "SF Mono", "Monaco", "Cascadia Code", "Consolas", monospace;
  font-size: 0.8125rem;
  line-height: 1.5;
  white-space: pre;
  background: transparent;
  border: 1px solid var(--color-rule);
  border-radius: 4px;
  padding: var(--space-3);
  margin: var(--space-3) 0;
  overflow-x: auto;
  color: var(--color-text);
}

@media (max-width: 480px) {
  .ascii {
    font-size: 0.6875rem;
    padding: var(--space-2);
  }
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-3) 0;
  font-size: 0.9375rem;
}

th,
td {
  text-align: left;
  padding: var(--space-1) var(--space-2) var(--space-1) 0;
  border-bottom: 1px solid var(--color-rule);
  vertical-align: top;
}

th {
  font-weight: 600;
  color: var(--color-text);
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding-bottom: var(--space-1);
}

td {
  color: var(--color-muted);
}

td:first-child {
  color: var(--color-text);
  font-weight: 500;
}

/* Pull quote (for case study openers) */
.pull-quote {
  border-left: 2px solid var(--color-faint);
  padding-left: var(--space-3);
  margin: var(--space-3) 0;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
}

.pull-quote p {
  margin-bottom: var(--space-1);
}

.pull-quote cite {
  font-style: normal;
  font-size: 0.8125rem;
  color: var(--color-muted);
}

/* Insight callout */
.insight {
  font-size: 1rem;
  font-weight: 500;
  margin: var(--space-3) 0;
  padding: var(--space-2) var(--space-3);
  background: transparent;
  border-left: 2px solid var(--color-text);
}

/* Diagram placeholder */
.diagram-placeholder {
  border: 1px dashed var(--color-rule);
  padding: var(--space-3);
  margin: var(--space-3) 0;
  text-align: center;
  font-size: 0.8125rem;
  color: var(--color-faint);
  font-style: italic;
}

/* ============================================================
   Entity diagram (PG&E case study)
   ============================================================ */

.entity-diagram {
  width: 100%;
  max-width: 640px;
  height: auto;
  display: block;
  margin: var(--space-4) auto;
  font-family: inherit;
}

.ed-entity-box {
  fill: var(--color-bg);
  stroke: var(--color-text);
  stroke-width: 1.25;
}

.ed-container-box {
  fill: none;
  stroke: var(--color-rule);
  stroke-width: 1;
  stroke-dasharray: 3 3;
}

.ed-entity-label {
  fill: var(--color-text);
  font-size: 13.5px;
  font-weight: 500;
  font-family: inherit;
}

.ed-container-label {
  fill: var(--color-muted);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.1em;
  font-family: inherit;
}

.ed-rel-label {
  fill: var(--color-muted);
  font-size: 11px;
  font-family: inherit;
}

.ed-rel-label-sub {
  fill: var(--color-muted);
  font-size: 11px;
  font-style: italic;
  font-family: inherit;
}

.ed-relationship {
  stroke: var(--color-text);
  stroke-width: 1;
  fill: none;
}

.ed-criticality {
  stroke: var(--color-text);
  stroke-width: 1.5;
  stroke-dasharray: 5 4;
  fill: none;
  color: var(--color-text);
  animation: ed-criticality-flow 1.8s linear infinite;
}

@keyframes ed-criticality-flow {
  to { stroke-dashoffset: -18; }
}

@media (prefers-reduced-motion: reduce) {
  .ed-criticality {
    animation: none;
  }
}

/* ============================================================
   Soundtrack button (footer)
   ============================================================ */

/* Soundtrack toggle (footer) */
.soundtrack-toggle {
  background: transparent;
  border: 0;
  padding: 0;
  margin: 0;
  font: inherit;
  font-size: 0.875rem;
  color: var(--color-muted);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.45em;
  transition: color 0.15s ease;
}

.soundtrack-toggle:hover {
  color: var(--color-text);
}

.soundtrack-toggle .soundtrack-icon {
  display: inline-block;
  font-size: 0.85em;
  line-height: 1;
  width: 0.85em;
  text-align: center;
}

.soundtrack-toggle.playing {
  color: var(--color-text);
}

#yt-player-host {
  position: fixed;
  left: -9999px;
  top: -9999px;
  opacity: 0;
  pointer-events: none;
  border: 0;
}

/* Floating CTA (top-right, persistent) */
.floating-cta {
  position: fixed;
  top: var(--space-2);
  right: var(--space-2);
  z-index: 100;
  padding: 0.55rem 1rem;
  border: 1px solid #c2bdb3;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(140%) blur(12px);
  -webkit-backdrop-filter: saturate(140%) blur(12px);
  font-size: 0.8125rem;
  font-weight: 500;
  color: #4a6b8a;
  text-decoration: none;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.03);
  transition: background 0.15s ease, border-color 0.15s ease, box-shadow 0.18s ease;
}

.floating-cta:hover {
  border-color: #4a6b8a;
  background: rgba(74, 107, 138, 0.06);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

@media (max-width: 560px) {
  .floating-cta {
    top: auto;
    bottom: var(--space-2);
    right: 50%;
    transform: translateX(50%);
  }
}