/* ============================================
   Font Face Declarations
   ============================================ */
@font-face {
  font-family: "ABC Marist Unlicensed Trial Book";
  src: url("fonts/ABCMaristUnlicensedTrial-Book.ttf") format("truetype");
  font-weight: normal;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "ABC Marist Unlicensed Trial Book Placeholder";
  src: url("fonts/ABCMaristUnlicensedTrial-BookPlaceholder.ttf") format("truetype");
  font-weight: normal;
  font-style: normal;
  font-display: swap;
}

/* ============================================
   CSS Variables & Base
   ============================================ */
:root {
  /* Base Colors (Shared Across All Sections) - Dark Mode */
  --bg-primary: #0F1211;
  --bg-secondary: #1a1e1d;
  --bg-tertiary: #222726;
  --text-primary: #E7E9E8;
  --text-secondary: #A3AAA7;
  --text-muted: #6E7672;
  --border-color: #222726;
  
  /* Section Accent Colors (Dark Mode) - Darker & Sophisticated */
  --accent-intro: #1D7A84;     /* About Me - Darker Teal */
  --accent-work: #3D5FA8;       /* Work - Darker Indigo */
  --accent-opensource: #347A5C; /* Open Source - Darker Forest Green */
  --accent-talks: #B35F2E;      /* Talks - Darker Burnt Copper */
  --accent-contact: #7D529A;    /* Contact - Darker Plum */
  
  /* Typography */
  --font-serif: "ABC Marist Unlicensed Trial Book", "ABC Marist Unlicensed Trial Book Placeholder", sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', monospace;
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 4rem;
  --space-2xl: 8rem;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light Mode - Manual class override takes precedence */
[data-theme="light"] {
  /* Base Colors - Light Mode */
  --bg-primary: #FCFCFB;
  --bg-secondary: #F6F7F6;
  --bg-tertiary: #EDF0EE;
  --text-primary: #141615;
  --text-secondary: #4B514F;
  --text-muted: #737B77;
  --border-color: #E2E7E4;
  
  /* Section Accent Colors (Light Mode) - tuned to match dark mode hues without going "inky" */
  --accent-intro: #2A8F98;      /* Teal (lighter, less inky) */
  --accent-work: #4F73C0;       /* Indigo */
  --accent-opensource: #4B8B6E; /* Forest */
  --accent-talks: #C56E3B;      /* Copper */
  --accent-contact: #8A63B3;    /* Plum */
}

/* System preference - observe but default to dark in JS */

/* ============================================
   Reset & Base
   ============================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--bg-primary);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-variant-emoji: unicode;
}

/* ============================================
   Cursor
   ============================================ */
html.cursor-enabled,
html.cursor-enabled * {
  cursor: none !important;
}

#cursor {
  position: fixed;
  top: 0;
  left: 0;
  width: 18px;
  height: 18px;
  border-radius: 999px;
  pointer-events: none;
  z-index: 99999;
  opacity: 0;
  transform: translate3d(
      calc(var(--cursor-x, -9999px) - 9px),
      calc(var(--cursor-y, -9999px) - 9px),
      0
    )
    scale(var(--cursor-scale, 1));
  transition: opacity 160ms ease;

  --cursor-color: var(--accent-intro);
  --cursor-scale: 1;
  --cursor-alpha: 0.95;

  contain: layout paint;

  /* Core */
  background:
    radial-gradient(
      circle at 35% 35%,
      color-mix(in srgb, white 30%, var(--cursor-color)) 0%,
      color-mix(in srgb, white 8%, var(--cursor-color)) 30%,
      color-mix(in srgb, var(--cursor-color) 72%, transparent) 64%,
      transparent 72%
    );
  filter: saturate(1.15);
  mix-blend-mode: screen;
  will-change: transform, opacity;
}

#cursor::before {
  content: "";
  position: absolute;
  inset: -14px;
  border-radius: inherit;
  background:
    radial-gradient(
      circle,
      color-mix(in srgb, var(--cursor-color) 70%, transparent) 0%,
      transparent 65%
    );
  filter: blur(9px);
  opacity: calc(var(--cursor-alpha) * 0.55);
}

#cursor::after {
  content: "";
  position: absolute;
  inset: -26px;
  border-radius: inherit;
  background:
    radial-gradient(
      circle,
      color-mix(in srgb, var(--cursor-color) 40%, transparent) 0%,
      transparent 70%
    );
  filter: blur(14px);
  opacity: calc(var(--cursor-alpha) * 0.3);
}

html.cursor-enabled #cursor {
  opacity: 1;
}

html.cursor-enabled #cursor.is-hovering {
  --cursor-scale: 1.38;
  --cursor-alpha: 1;
}

html.cursor-enabled #cursor.is-down {
  --cursor-scale: 0.92;
  --cursor-alpha: 1;
}

/* Light mode: avoid "screen" washout; add a crisp ring for contrast */
[data-theme="light"] #cursor {
  mix-blend-mode: normal;
  filter: saturate(1.1) contrast(1.05);
  background:
    radial-gradient(
      circle at 35% 35%,
      color-mix(in srgb, white 20%, var(--cursor-color)) 0%,
      color-mix(in srgb, var(--cursor-color) 60%, transparent) 55%,
      transparent 72%
    );
  box-shadow:
    0 0 0 1px color-mix(in srgb, var(--cursor-color) 55%, var(--bg-primary)),
    0 0 18px color-mix(in srgb, var(--cursor-color) 35%, transparent);
}

[data-theme="light"] #cursor::before {
  opacity: calc(var(--cursor-alpha) * 0.45);
}

[data-theme="light"] #cursor::after {
  opacity: calc(var(--cursor-alpha) * 0.18);
}

@media (prefers-reduced-motion: reduce) {
  html.cursor-enabled #cursor {
    transition: none;
  }
}

/* ============================================
   Layout
   ============================================ */
.container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 100vh;
  position: relative;
}

#graph-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 50vw;
  height: 100vh;
  z-index: 1;
}

#graph-container canvas {
  display: block;
}

.content {
  grid-column: 2;
  padding: var(--space-xl) var(--space-xl) var(--space-2xl);
  max-width: 600px;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  min-height: 100vh;
  position: relative;
  z-index: 2;
  padding-top: var(--space-2xl);
}

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

.name {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 400;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: var(--space-xs);
}

.tagline {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-style: italic;
  color: var(--text-muted);
}

/* ============================================
   Introduction
   ============================================ */
.intro {
  margin-bottom: var(--space-xl);
}

.intro-text {
  font-size: 1.125rem;
  line-height: 1.6;
  color: var(--text-primary);
  margin-bottom: var(--space-md);
}

.intro-text.secondary {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-style: italic;
}

/* ============================================
   Expandable Sections (Accordion)
   ============================================ */
.sections {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.section-block {
  border-bottom: 1px solid var(--border-color);
  transition: border-color var(--transition-base);
}

.section-block:first-child {
  border-top: 1px solid var(--border-color);
}

.section-block.active {
  border-color: var(--section-accent);
}

.section-block.active + .section-block {
  border-top-color: var(--section-accent);
}

/* Section Header (Clickable) */
.section-header {
  width: 100%;
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  transition: all var(--transition-fast);
}

.section-header:hover .section-title,
.section-header:focus .section-title {
  color: var(--section-accent);
}

.section-header:hover {
  transform: translateX(2px);
}

.section-header:active {
  transform: translateX(1px) scale(0.98);
}

.section-header:focus {
  outline: none;
}

.section-header:focus-visible {
  outline: 2px solid var(--section-accent);
  outline-offset: 4px;
}

.section-shape {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.section-shape svg {
  display: block;
}

.section-block.active .section-shape,
.section-header:hover .section-shape {
  color: var(--section-accent);
}

.section-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--text-secondary);
  flex: 1;
  transition: color var(--transition-fast);
}

.section-block.active .section-title {
  color: var(--section-accent);
}

.section-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  transition: transform var(--transition-base), color var(--transition-fast);
}

.section-block.active .section-icon {
  transform: rotate(180deg);
  color: var(--section-accent);
}

/* Section-specific accent colors */
.section-block[data-section="intro"] { --section-accent: var(--accent-intro); }
.section-block[data-section="work"] { --section-accent: var(--accent-work); }
.section-block[data-section="projects"] { --section-accent: var(--accent-opensource); }
.section-block[data-section="media"] { --section-accent: var(--accent-talks); }
.section-block[data-section="contact"] { --section-accent: var(--accent-contact); }

/* Section Content (Expandable) */
.section-content {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--transition-slow);
  overflow: hidden;
}

.section-block.active .section-content {
  grid-template-rows: 1fr;
}

.section-inner {
  min-height: 0;
  padding: 0;
  opacity: 0;
  transform: translateY(-10px);
  transition: opacity var(--transition-base), transform var(--transition-base);
}

.section-block.active .section-inner {
  padding-bottom: var(--space-lg);
  opacity: 1;
  transform: translateY(0);
  transition-delay: 100ms;
}

.section-subtitle {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-style: italic;
  color: var(--text-muted);
  margin-bottom: var(--space-lg);
}

/* ============================================
   Work Items
   ============================================ */
.work-item {
  margin-bottom: var(--space-md);
  padding: var(--space-md);
  border: 1px dotted transparent;
  transition: all var(--transition-base);
}

.work-item:hover {
  border-color: var(--accent-work);
  transform: translateX(2px);
}

.work-item:last-child {
  margin-bottom: 0;
}

.work-company {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--space-xs);
}

.work-period {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  display: block;
  margin-bottom: var(--space-md);
}

.work-role {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 400;
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
}

.work-description {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.work-location {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-style: italic;
  line-height: 1.7;
}

.work-roles {
  margin-top: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.work-role-item {
  padding-left: var(--space-md);
  border-left: 2px dotted var(--border-color);
  position: relative;
}

.work-role-item:last-child {
  padding-bottom: 0;
}

.work-role-period {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  display: block;
  margin-bottom: var(--space-xs);
}

.work-join-link {
  display: block;
  margin-top: var(--space-lg);
  font-size: 0.9375rem;
  color: var(--text-secondary);
  text-decoration: underline;
  transition: color var(--transition-fast);
  font-variant-emoji: unicode;
}

.work-join-link:hover {
  color: var(--accent-work);
}

/* ============================================
   Project List (Expandable Projects)
   ============================================ */
.project-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.project-block {
  border: 1px dotted transparent;
  transition: border-color var(--transition-base);
}

.project-block:not(.project-block-simple) {
  cursor: pointer;
}

.project-block:not(.project-block-simple):hover {
  border-color: var(--accent-opensource);
}

.project-block.active {
  border-color: var(--accent-opensource);
}

/* Project Header (clickable) */
.project-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  width: 100%;
  padding: var(--space-md);
  background: transparent;
  border: none;
  cursor: pointer;
  text-align: left;
  transition: all var(--transition-base);
}

.project-header-static {
  cursor: default;
}

.project-header:hover:not(.project-header-static) {
  background: color-mix(in srgb, var(--accent-opensource) 5%, transparent);
}

.project-icon {
  color: var(--accent-opensource);
  flex-shrink: 0;
  line-height: 1;
}

.project-icon svg {
  display: block;
}

.project-name {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 400;
  color: var(--text-primary);
  margin: 0;
  flex-grow: 1;
}

.project-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.05em;
}

.project-role {
  color: var(--text-secondary);
}

.project-status {
  padding: 2px 6px;
  border-radius: 3px;
  font-weight: 400;
}

.project-status-active {
  background: color-mix(in srgb, var(--accent-opensource) 15%, transparent);
  color: var(--accent-opensource);
}

.project-status-sunset {
  background: color-mix(in srgb, var(--text-muted) 15%, transparent);
  color: var(--text-muted);
}

.project-chevron {
  color: var(--text-muted);
  flex-shrink: 0;
  transition: transform var(--transition-base);
}

.project-block.active .project-chevron {
  transform: rotate(180deg);
}

/* Project Content (expandable) */
.project-content {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--transition-slow);
  overflow: hidden;
}

.project-block.active .project-content {
  grid-template-rows: 1fr;
}

.project-inner {
  min-height: 0;
  overflow: hidden;
  padding: 0 var(--space-md);
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity var(--transition-base), transform var(--transition-base), padding var(--transition-base);
}

.project-block.active .project-inner {
  padding: 0 var(--space-md) var(--space-md);
  opacity: 1;
  transform: translateY(0);
  transition-delay: 50ms;
}

/* Contribution Items (clickable links to PRs) */
.contribution-item {
  display: block;
  padding: var(--space-xs) var(--space-xs);
  border-bottom: 1px dotted var(--border-color);
  text-decoration: none;
  transition: all var(--transition-fast);
  cursor: pointer;
  cursor: pointer;
}

.contribution-item:last-of-type {
  border-bottom: none;
}

.contribution-item:hover {
  padding-left: var(--space-sm);
  background: color-mix(in srgb, var(--accent-opensource) 8%, transparent);
  border-color: var(--accent-opensource);
}

.contribution-item:hover .contrib-title {
  color: var(--accent-opensource);
}

.contrib-title {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.contrib-detail {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* GitHub Link */
.project-github-link {
  display: inline-block;
  margin-top: var(--space-sm);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--accent-opensource);
  cursor: pointer;
  letter-spacing: 0.05em;
  text-decoration: none;
  transition: opacity var(--transition-fast);
}

.project-github-link:hover {
  opacity: 0.8;
}

/* Simple project (Vinture - no expansion) */
.project-block-simple .project-header {
  padding-bottom: var(--space-xs);
}

.project-tagline {
  padding: 0 var(--space-md) var(--space-md);
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin: 0;
}

.project-description {
  padding: 0 var(--space-md) var(--space-md);
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.5;
}

/* ============================================
   Media List (formerly Talks)
   ============================================ */
.talks-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.talk-item {
  display: grid;
  grid-template-columns: 50px 1fr;
  gap: var(--space-md);
  text-decoration: none;
  color: inherit;
  padding: var(--space-md);
  border: 1px dotted transparent;
  transition: all var(--transition-base);
  cursor: pointer;
}

.talk-item:hover {
  border-color: var(--accent-talks);
  transform: translateY(-2px);
}

.talk-item:active {
  transform: translateY(-1px) scale(0.98);
}

.talk-date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-talks);
  padding-top: 4px;
}

.talk-title {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 400;
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
}

.talk-venue {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
}

.talk-abstract {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-sm);
}

.talk-links {
  display: flex;
  gap: var(--space-md);
}

.talk-link {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.talk-link:hover {
  color: var(--accent-talks);
}

/* ============================================
   Contact Links
   ============================================ */
.contact-links {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.contact-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-md);
  margin-bottom: var(--space-sm);
  border: 1px dotted transparent;
  text-decoration: none;
  transition: all var(--transition-base);
  font-variant-emoji: unicode;
}

.contact-item:hover {
  border-color: var(--accent-contact);
  transform: translateX(4px);
}

.contact-item:active {
  transform: translateX(2px) scale(0.98);
}

.contact-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--text-secondary);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.contact-value {
  font-family: var(--font-serif);
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  font-variant-emoji: unicode;
}

.contact-item:hover .contact-value {
  color: var(--accent-contact);
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 1024px) {
  .container {
    grid-template-columns: 1fr;
  }
  
  #graph-container {
    display: none; /* Hide graph on mobile */
  }
  
  .content {
    grid-column: 1;
    padding: var(--space-xl) var(--space-lg);
    min-height: auto;
    padding-top: var(--space-lg);
  }
}

@media (max-width: 640px) {
  .content {
    padding: var(--space-lg) var(--space-md);
  }
  
  .intro-text {
    font-size: 1rem;
  }
  
  .section-inner {
    padding-left: 0;
  }
  
  .talk-item {
    grid-template-columns: 40px 1fr;
  }
}

/* ============================================
   Utility Classes
   ============================================ */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.is-graph-highlight {
  position: relative;
  border-color: var(--section-accent);
  background: color-mix(in srgb, var(--section-accent) 8%, transparent);
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

/* ============================================
   Graph Styles
   ============================================ */

#graph-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 50vw;
  height: 100vh;
  z-index: 1;
  overflow: hidden;
  background: var(--bg-primary);
}

#graph-container svg {
  display: block;
  width: 100%;
  height: 100%;
  cursor: grab;
}

#graph-container svg:active {
  cursor: grabbing;
}

.graph-tooltip {
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  font-variant-emoji: unicode;
}

/* Clean link styling - curved paths with subtle presence */
.link {
  transition: stroke-opacity 300ms ease, stroke 200ms ease, stroke-width 200ms ease;
  stroke-linecap: round;
  pointer-events: none;
}

/* Node styling enhancements */
.node {
  cursor: grab;
  /* No transition on opacity for fluid movement */
}

.node:active {
  cursor: grabbing;
}

.node-category {
  cursor: pointer;
}

.node-item {
  cursor: pointer;
}

.node-center {
  cursor: pointer;
}

.node-center circle {
  transition: transform 150ms ease;
}

/* Smooth transitions for node interactions */
.node circle,
.node rect,
.node polygon {
  transition: transform 150ms ease, opacity 150ms ease;
}

.node:hover circle,
.node:hover rect,
.node:hover polygon {
  opacity: 0.85;
}

/* Fade transition for showing/hiding nodes */
.node-item {
  transition: opacity 300ms ease;
}

/* ============================================
   Controls Panel (Theme + Mute)
   ============================================ */
.controls-panel {
  position: fixed;
  bottom: var(--space-lg);
  right: var(--space-lg);
  z-index: 1000;
  display: flex;
  gap: var(--space-sm);
  align-items: center;
}

.control-button {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 8px 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  transition: all var(--transition-base);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
  user-select: none;
}

.control-button:hover {
  border-color: var(--text-secondary);
  transform: translateY(-2px);
}

.control-button:active {
  transform: translateY(-1px) scale(0.95);
}

.control-button-icon {
  width: 14px;
  height: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
}

.control-button-icon svg {
  display: block;
  width: 100%;
  height: 100%;
}

.control-button.muted {
  opacity: 0.5;
}

@media (max-width: 1024px) {
  .controls-panel {
    bottom: var(--space-md);
    right: var(--space-md);
  }
}

/* Legacy theme toggle - keeping for backwards compatibility but hidden */
.theme-toggle {
  display: none;
}