/* ==========================================================================
   Design System – Aditya Bharath Portfolio
   Colorful, Clean, Catchy
   ========================================================================== */

:root {
  /* Core Palette */
  --color-sand: #FFC067;
  --color-aqua: #66F4FF;
  --color-sky: #66C4FF;
  --color-slate: #7D99AA;
  
  /* Derived / adjusted for contrast */
  --color-sand-dark: #D9943D;
  --color-sky-dark: #3D8FCC;
  --color-aqua-dark: #2BBAC9;
  --color-slate-dark: #5A7585;
  
  /* Background & Surfaces - Light base */
  --color-bg: #FAFAFA;
  --color-surface: #FFFFFF;
  --color-surface-elevated: #FFFFFF;
  --color-surface-warm: #FFF9F0;
  
  /* Text */
  --color-text: #1F2937;
  --color-text-secondary: #4B5563;
  --color-text-muted: #6B7280;
  --color-text-quiet: rgba(31, 41, 55, 0.5);
  
  /* Primary accent: Sky blue */
  --color-accent: #3D8FCC;
  --color-accent-soft: rgba(102, 196, 255, 0.12);
  --color-accent-mid: rgba(102, 196, 255, 0.25);
  --color-accent-hover: #2D7AB8;
  
  /* Secondary: Sand/warm */
  --color-secondary: #D9943D;
  --color-secondary-soft: rgba(255, 192, 103, 0.15);
  --color-secondary-mid: rgba(255, 192, 103, 0.3);
  
  /* Tertiary: Aqua */
  --color-tertiary: #2BBAC9;
  --color-tertiary-soft: rgba(102, 244, 255, 0.12);
  
  /* Borders & Dividers */
  --color-border: rgba(125, 153, 170, 0.2);
  --color-border-strong: rgba(125, 153, 170, 0.35);
  --color-divider: rgba(125, 153, 170, 0.12);
  
  /* Graph Colors */
  --color-node-fill: #FFFFFF;
  --color-node-stroke: var(--color-slate);
  --color-node-stroke-hover: var(--color-sky);
  --color-node-stroke-active: var(--color-sky-dark);
  --color-edge: rgba(125, 153, 170, 0.4);
  --color-edge-active: var(--color-aqua-dark);
  --color-glow: rgba(102, 196, 255, 0.35);
  
  /* Pill Colors (rotating) */
  --color-pill-0: var(--color-sky-dark);
  --color-pill-0-bg: rgba(102, 196, 255, 0.12);
  --color-pill-1: var(--color-secondary);
  --color-pill-1-bg: rgba(255, 192, 103, 0.15);
  --color-pill-2: var(--color-tertiary);
  --color-pill-2-bg: rgba(102, 244, 255, 0.12);
  --color-pill-3: var(--color-slate-dark);
  --color-pill-3-bg: rgba(125, 153, 170, 0.12);
  
  /* Typography */
  --font-family: system-ui, -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Segoe UI', sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, monospace;
  
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.8125rem;
  --font-size-base: 0.9375rem;
  --font-size-md: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.375rem;
  --font-size-2xl: 1.75rem;
  --font-size-3xl: 2.25rem;
  
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.65;
  
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-black: 800;
  
  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  
  /* Layout */
  --container-max: 1400px;
  --header-height: 64px;
  
  /* Radii */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.1);
  --shadow-card: 0 2px 8px rgba(125, 153, 170, 0.1), 0 1px 3px rgba(0, 0, 0, 0.04);
  --shadow-glow: 0 0 20px rgba(102, 196, 255, 0.3);
  
  /* Transitions */
  --transition-fast: 120ms ease;
  --transition-normal: 180ms ease;
  --transition-slow: 280ms ease;
}

/* Dark mode disabled - light theme only for clean, natural look */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ==========================================================================
   Accessibility
   ========================================================================== */
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-4);
  padding: var(--space-3) var(--space-4);
  background: var(--color-accent);
  color: white;
  border-radius: var(--radius-md);
  font-weight: var(--font-weight-semibold);
  z-index: 1000;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-4);
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* ==========================================================================
   Typography
   ========================================================================== */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-text);
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

kbd {
  display: inline-block;
  padding: 2px 6px;
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  background: var(--color-surface);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  box-shadow: 0 1px 0 var(--color-border);
}

/* ==========================================================================
   Header
   ========================================================================== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  padding: 0 var(--space-6);
  background: rgba(250, 250, 250, 0.95);
  border-bottom: 1px solid var(--color-divider);
  backdrop-filter: blur(12px);
}

.header__brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.header__name {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-black);
  color: var(--color-text);
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.header__name:hover {
  color: var(--color-accent);
}

.header__subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  letter-spacing: 0.01em;
  font-weight: var(--font-weight-normal);
}

.header__location {
  font-style: italic;
  text-decoration: underline;
  text-decoration-color: var(--color-sky);
  text-underline-offset: 2px;
  color: var(--color-accent);
  font-weight: var(--font-weight-semibold);
}

.header__cursor {
  display: inline-block;
  color: var(--color-sky);
  font-weight: var(--font-weight-normal);
  margin-left: 1px;
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

.header__nav {
  display: none;
}

.nav__list {
  display: flex;
  gap: var(--space-1);
  list-style: none;
}

.nav__link {
  display: block;
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.nav__link:hover,
.nav__link:focus {
  color: var(--color-text);
  background: var(--color-accent-soft);
}

.nav__toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  background: transparent;
  border: none;
  cursor: pointer;
}

.nav__toggle-bar {
  width: 20px;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

@media (min-width: 768px) {
  .header {
    padding: 0 var(--space-8);
  }
  
  .header__nav {
    display: block;
  }
  
  .nav__toggle {
    display: none;
  }
}

/* ==========================================================================
   Main Content
   ========================================================================== */
.main {
  min-height: calc(100vh - var(--header-height));
}

/* ==========================================================================
   Hero / Graph Section
   ========================================================================== */
.hero {
  min-height: calc(100vh - var(--header-height));
  padding: var(--space-6);
  display: flex;
  align-items: flex-start;
  padding-top: var(--space-8);
}

.hero__container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

.hero__graph {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

/* CTA / Instructions - Colorful accent */
.graph__instructions {
  text-align: center;
  padding: var(--space-3) var(--space-5);
  background: linear-gradient(135deg, var(--color-accent-soft) 0%, var(--color-tertiary-soft) 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.graph__hint {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-medium);
}

.graph__hint kbd {
  margin: 0 3px;
  background: var(--color-surface);
  border: 1px solid var(--color-border-strong);
  color: var(--color-accent);
  font-weight: var(--font-weight-semibold);
}

.graph__canvas {
  position: relative;
  aspect-ratio: 4 / 3;
  min-height: 380px;
  max-height: 520px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  /* Subtle gradient background */
  background: linear-gradient(180deg, var(--color-surface) 0%, var(--color-bg) 100%);
}

.graph__canvas:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

#networkSvg {
  width: 100%;
  height: 100%;
  display: block;
}

/* Details Panel */
.hero__panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-card);
  min-height: 400px;
  border-top: 4px solid var(--color-sky);
}

.panel__header {
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-divider);
}

.panel__title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-accent);
  margin-bottom: var(--space-2);
}

.panel__summary {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

.panel__entries {
  margin-bottom: var(--space-6);
}

.panel__stack {
  margin-bottom: 0;
}

.panel__section-title {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  color: var(--color-slate-dark);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.panel__section-title::before {
  content: '';
  width: 3px;
  height: 14px;
  background: var(--color-sand);
  border-radius: 2px;
}

/* Entry cards */
.panel__entry {
  padding: var(--space-4);
  margin-bottom: var(--space-3);
  background: var(--color-surface-warm);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--color-sky);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.panel__entry:last-child {
  margin-bottom: 0;
}

.panel__entry:hover {
  border-left-color: var(--color-aqua-dark);
  box-shadow: var(--shadow-sm);
}

.panel__entry-title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.panel__entry-link {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.panel__entry-link:hover {
  color: var(--color-accent-hover);
  text-decoration: underline;
}

.panel__entry-name {
  color: var(--color-text);
}

/* Bullet list styling */
.panel__bullets {
  list-style: none;
  padding: 0;
  margin: 0;
}

.panel__bullets li {
  position: relative;
  padding-left: var(--space-5);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-2);
}

.panel__bullets li:last-child {
  margin-bottom: 0;
}

.panel__bullets li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  background: var(--color-sand);
  border-radius: 50%;
}

.panel__pills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

@media (min-width: 1024px) {
  .hero {
    padding: var(--space-8);
    padding-top: var(--space-10);
    align-items: flex-start;
  }
  
  .hero__container {
    grid-template-columns: 1.15fr 1fr;
    gap: var(--space-8);
    align-items: start;
  }
  
  .hero__graph {
    /* Align with panel top */
  }
  
  .graph__canvas {
    aspect-ratio: 5 / 4;
    min-height: 450px;
    max-height: 580px;
  }
  
  .hero__panel {
    position: sticky;
    top: calc(var(--header-height) + var(--space-10));
    /* Match the combined height of instructions + graph */
    min-height: 520px;
  }
}

@media (min-width: 1400px) {
  .hero__container {
    grid-template-columns: 1.3fr 1fr;
  }
  
  .graph__canvas {
    max-height: 650px;
  }
}

/* ==========================================================================
   Sections
   ========================================================================== */
.section {
  padding: var(--space-16) var(--space-6);
}

.section__container {
  max-width: var(--container-max);
  margin: 0 auto;
}

.section__title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-black);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-8);
  color: var(--color-text);
}

@media (min-width: 768px) {
  .section {
    padding: var(--space-20) var(--space-8);
  }
  
  .section__title {
    font-size: var(--font-size-3xl);
  }
}

/* ==========================================================================
   About Section
   ========================================================================== */
.about__content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
}

.about__text {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-4);
}

.about__text--lead {
  font-size: var(--font-size-lg);
  color: var(--color-text);
}

.about__heading {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-4);
}

.about__degree {
  margin-bottom: var(--space-4);
}

.about__school {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
}

.about__program {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-top: var(--space-1);
}

.about__details {
  display: block;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

@media (min-width: 768px) {
  .about__content {
    grid-template-columns: 2fr 1fr;
    gap: var(--space-16);
  }
}

/* ==========================================================================
   Projects Section
   ========================================================================== */
.projects__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

.project-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-top: 3px solid var(--color-sky);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition-normal), transform var(--transition-normal), border-color var(--transition-fast);
}

.project-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
  border-top-color: var(--color-aqua-dark);
}

.project-card__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.project-card__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
}

.project-card__type {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--color-secondary);
  background: var(--color-secondary-soft);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.project-card__desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-4);
}

.project-card__stack {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.project-card__link {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-accent);
}

.project-card__link:hover {
  text-decoration: underline;
}

@media (min-width: 768px) {
  .projects__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1200px) {
  .projects__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ==========================================================================
   Experience Section
   ========================================================================== */
.timeline {
  position: relative;
  padding-left: var(--space-8);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--color-sky) 0%, var(--color-sand) 100%);
  border-radius: 1px;
}

.timeline__item {
  position: relative;
  padding-bottom: var(--space-8);
}

.timeline__item:last-child {
  padding-bottom: 0;
}

.timeline__marker {
  position: absolute;
  left: calc(-1 * var(--space-8) + 3px);
  top: 6px;
  width: 12px;
  height: 12px;
  background: var(--color-sky);
  border: 2px solid var(--color-bg);
  border-radius: 50%;
  box-shadow: 0 0 0 3px var(--color-accent-soft);
}

.timeline__content {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-sky);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition-fast);
}

.timeline__content:hover {
  border-left-color: var(--color-aqua-dark);
}

.timeline__header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-2);
  margin-bottom: var(--space-1);
}

.timeline__role {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
}

.timeline__company {
  font-size: var(--font-size-sm);
  color: var(--color-accent);
  font-weight: var(--font-weight-semibold);
}

.timeline__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.timeline__location,
.timeline__dates {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.timeline__bullets {
  list-style: none;
  padding-left: 0;
}

.timeline__bullets li {
  position: relative;
  padding-left: var(--space-4);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-2);
}

.timeline__bullets li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 4px;
  height: 4px;
  background: var(--color-text-muted);
  border-radius: 50%;
}

.timeline__bullets li:last-child {
  margin-bottom: 0;
}

@media (min-width: 768px) {
  .timeline {
    padding-left: var(--space-12);
  }
  
  .timeline__marker {
    left: calc(-1 * var(--space-12) + 3px);
  }
}

/* ==========================================================================
   Skills Section
   ========================================================================== */
.skills__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

.skills__heading {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.skills__pills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

@media (min-width: 768px) {
  .skills__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .skills__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ==========================================================================
   Resume Section
   ========================================================================== */
.section--resume {
  background: var(--color-surface);
  border-top: 1px solid var(--color-divider);
}

.resume__cta {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
}

.resume__actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  align-items: center;
}

.resume__button {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-6);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: #FFFFFF;
  background: linear-gradient(135deg, var(--color-sky-dark) 0%, var(--color-accent) 100%);
  border-radius: var(--radius-lg);
  text-decoration: none;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-md);
}

.resume__button:hover {
  background: linear-gradient(135deg, var(--color-accent-hover) 0%, var(--color-sky-dark) 100%);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
  color: #FFFFFF;
}

.resume__button--secondary {
  background: var(--color-surface);
  color: var(--color-accent);
  border: 2px solid var(--color-sky);
}

.resume__button--secondary:hover {
  background: var(--color-accent-soft);
  border-color: var(--color-accent);
}

.resume__icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

@media (min-width: 768px) {
  .resume__actions {
    flex-direction: row;
    justify-content: center;
  }
}

@media (min-width: 1024px) {
  .contact__grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ==========================================================================
   Pills / Tags - Colorful rotating palette
   ========================================================================== */
.pill {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-full);
  white-space: nowrap;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.pill:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

/* Rotating colors for visual variety */
.pill--0 {
  color: var(--color-pill-0);
  background: var(--color-pill-0-bg);
}

.pill--1 {
  color: var(--color-pill-1);
  background: var(--color-pill-1-bg);
}

.pill--2 {
  color: var(--color-pill-2);
  background: var(--color-pill-2-bg);
}

.pill--3 {
  color: var(--color-pill-3);
  background: var(--color-pill-3-bg);
}

.pill--skill {
  color: var(--color-text-secondary);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}

.pill--secondary {
  color: var(--color-secondary);
  background: var(--color-secondary-soft);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  padding: var(--space-6);
  border-top: 1px solid var(--color-divider);
  background: var(--color-bg);
}

.footer__container {
  max-width: var(--container-max);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer__main {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

@media (min-width: 768px) {
  .footer__main {
    flex-direction: row;
    align-items: center;
    gap: var(--space-4);
  }
}

.footer__copy {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.footer__email {
  font-size: var(--font-size-sm);
  color: var(--color-accent);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer__email:hover {
  color: var(--color-accent-hover);
  text-decoration: underline;
}

.footer__links {
  display: flex;
  gap: var(--space-4);
}

.footer__links a {
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.footer__links a:hover {
  color: var(--color-accent);
}

.footer__icon {
  width: 20px;
  height: 20px;
}

/* ==========================================================================
   Graph Node Styles - Colorful, Clean
   ========================================================================== */
.graph-node {
  cursor: pointer;
}

.graph-node:hover .node-circle {
  stroke: var(--color-node-stroke-hover);
  stroke-width: 3px;
  filter: drop-shadow(0 0 8px var(--color-glow));
}

.graph-node.active .node-circle {
  stroke: var(--color-node-stroke-active);
  stroke-width: 3.5px;
  filter: drop-shadow(0 0 12px var(--color-glow));
}

.graph-node.dimmed {
  opacity: 0.35;
}

.node-glow {
  transition: opacity var(--transition-normal);
}

.node-circle {
  transition: stroke var(--transition-fast), stroke-width var(--transition-fast), filter var(--transition-normal);
}

.node-label {
  font-family: var(--font-family);
  fill: var(--color-text);
  font-weight: 700;
  transition: fill var(--transition-fast);
}

.graph-node:hover .node-label {
  fill: var(--color-text);
}

.graph-node.active .node-label {
  fill: var(--color-accent);
}

.graph-edge {
  stroke: var(--color-edge);
  stroke-width: 1.5px;
  transition: stroke var(--transition-normal), opacity var(--transition-normal), stroke-width var(--transition-normal);
}

.graph-edge.active {
  stroke: var(--color-edge-active);
  stroke-width: 3px;
  filter: drop-shadow(0 0 4px var(--color-glow));
}

.graph-edge.dimmed {
  opacity: 0.25;
}

/* ==========================================================================
   Tooltip - Clean with accent
   ========================================================================== */
.graph-tooltip {
  position: absolute;
  pointer-events: none;
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border);
  border-top: 3px solid var(--color-sky);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  box-shadow: var(--shadow-lg);
  font-size: var(--font-size-sm);
  color: var(--color-text);
  max-width: 220px;
  z-index: 1000;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.graph-tooltip.visible {
  opacity: 1;
  transform: translateY(0);
}

.graph-tooltip__title {
  font-weight: var(--font-weight-bold);
  color: var(--color-accent);
  margin-bottom: var(--space-1);
}

.graph-tooltip__desc {
  color: var(--color-text-secondary);
  font-size: var(--font-size-xs);
  line-height: var(--line-height-relaxed);
}

/* ============================================================
   LIGHT THEME OVERRIDES — “California beaches” palette
   Paste at the END of your main stylesheet
   Palette:
   Sand  #FFC067
   Aqua  #66F4FF
   Sky   #66C4FF
   Slate #7D99AA
   ============================================================ */

   :root{
    /* neutrals */
    --bg: #F7FAFC;
    --surface: #FFFFFF;
    --surface-2: #FBFDFF;
    --text: #111827;
    --muted: #334155;
    --border: #E8EEF5;
  
    /* palette */
    --sand: #FFC067;
    --aqua: #66F4FF;
    --sky:  #66C4FF;
    --slate:#7D99AA;
  
    /* graph tokens */
    --edge: rgba(125,153,170,0.55);
    --edge-dim: rgba(125,153,170,0.25);
    --edge-active: rgba(102,196,255,0.95);
  
    --node-fill: #FFFFFF;
    --node-stroke: rgba(125,153,170,0.85);
    --node-stroke-hover: rgba(102,196,255,1);    /* sky */
    --node-stroke-active: rgba(102,244,255,1);   /* aqua */
  
    /* soft accent glow */
    --accent-soft: rgba(102,244,255,0.18);
  
    /* shadow */
    --shadow: 0 10px 28px rgba(17,24,39,0.08);
    --shadow-sm: 0 6px 18px rgba(17,24,39,0.06);
  
    /* map to your existing vars (JS reads these) */
    --color-node-fill: var(--node-fill);
    --color-node-stroke: var(--node-stroke);
    --color-node-stroke-hover: var(--node-stroke-hover);
    --color-node-stroke-active: var(--node-stroke-active);
    --color-edge: var(--edge);
    --color-edge-active: var(--edge-active);
    --color-accent-soft: var(--accent-soft);
    --color-text: var(--text);
  }
  
  /* ---------- global / page ---------- */
  html, body {
    background: var(--bg) !important;
    color: var(--text) !important;
  }
  
  body {
    font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  }
  
  a { color: #1976D2; }
  a:hover { text-decoration: underline; }
  
  /* kill any dark theme wrappers if present */
  .dark, [data-theme="dark"] {
    background: var(--bg) !important;
    color: var(--text) !important;
  }
  
  /* ---------- header/nav (in case it’s being darkened elsewhere) ---------- */
  header, .header, .site-header, .topbar {
    background: transparent !important;
    color: var(--text) !important;
  }
  
  .nav a, header a {
    color: var(--muted) !important;
  }
  .nav a:hover, header a:hover {
    color: var(--text) !important;
  }
  
  /* ---------- graph canvas + container ---------- */
  #graphCanvas, .graph-canvas, .graph__canvas {
    background: transparent !important;
    color: var(--text) !important;
  }
  
  #networkSvg {
    background: transparent !important;
  }
  
  /* optional: if you have a big card wrapping the graph */
  .graph-card, .graph__card, .network-card, .graph-container {
    background: var(--surface) !important;
    border: 1px solid var(--border) !important;
    box-shadow: var(--shadow) !important;
    border-radius: 16px;
  }
  
  /* ---------- tooltip (force LIGHT) ---------- */
  .graph-tooltip{
    background: var(--surface) !important;
    color: var(--text) !important;
    border: 1px solid var(--border) !important;
    box-shadow: var(--shadow-sm) !important;
    border-radius: 12px;
    padding: 10px 12px;
  }
  .graph-tooltip__title{
    color: var(--text) !important;
    font-weight: 700;
  }
  .graph-tooltip__desc{
    color: var(--muted) !important;
  }
  
  /* ---------- graph nodes ---------- */
  .graph-node .node-circle{
    fill: var(--node-fill) !important;
    stroke: var(--node-stroke) !important;
  }
  
  .graph-node:hover .node-circle{
    stroke: var(--node-stroke-hover) !important;
  }
  
  .graph-node.active .node-circle{
    stroke: var(--node-stroke-active) !important;
  }
  
  /* glow: subtle, not neon */
  .graph-node .node-glow{
    fill: var(--accent-soft) !important;
    filter: none !important; /* prevents heavy neon */
  }
  
  /* node label */
  .node-label{
    fill: var(--text) !important;
  }
  
  /* dim state should still look clean */
  .graph-node.dimmed{
    opacity: 0.45;
  }
  
  /* ---------- graph edges ---------- */
  .graph-edge{
    stroke: var(--edge) !important;
    opacity: 1 !important;
  }
  .graph-edge.dimmed{
    stroke: var(--edge-dim) !important;
    opacity: 1 !important;
  }
  .graph-edge.active{
    stroke: var(--edge-active) !important;
  }
  
  /* ---------- details panel ---------- */
  #detailsPanel, .details-panel, .panel {
    background: var(--surface) !important;
    border: 1px solid var(--border) !important;
    box-shadow: var(--shadow) !important;
    border-radius: 18px;
  }
  
  /* panel header typography */
  .panel__title{
    color: var(--text) !important;
    letter-spacing: -0.02em;
  }
  .panel__summary{
    color: var(--muted) !important;
  }
  
  /* Section labels like HIGHLIGHTS / STACK */
  .panel__section-title{
    color: var(--muted) !important;
    text-transform: uppercase;
    letter-spacing: 0.14em;
  }
  
  /* Cards inside the panel (your “highlight blocks”) */
  .panel__item{
    background: var(--surface-2) !important;
    border: 1px solid var(--border) !important;
    border-radius: 14px;
    box-shadow: none;
  }
  
  /* Accent bar on left for each item (clean + catchy) */
  .panel__item{
    position: relative;
    overflow: hidden;
  }
  .panel__item::before{
    content: "";
    position: absolute;
    left: 0; top: 0; bottom: 0;
    width: 4px;
    background: var(--sky);
    opacity: 0.95;
  }
  
  /* Item title + bullets */
  .panel__item-title{
    color: var(--text) !important;
  }
  .panel__item-desc, .panel__item ul, .panel__item li{
    color: var(--muted) !important;
  }
  
  /* bullet dots: warm sand */
  .panel__item li::marker{
    color: var(--sand);
  }
  
  /* Make linked project titles feel clickable */
  .panel__item-title a{
    color: var(--text) !important;
    text-decoration: none !important;
  }
  .panel__item-title a:hover{
    color: #0F3D91 !important;
    text-decoration: underline !important;
  }
  
  /* ---------- pills ---------- */
  .panel__pills .pill, .pill{
    background: #EEF2F6 !important;
    color: var(--text) !important;
    border: 1px solid rgba(125,153,170,0.35) !important;
    border-radius: 999px;
    padding: 6px 10px;
  }
  
  /* Optional: rotate subtle accents on pills without looking neon */
  .panel__pills .pill:nth-child(4n+1){ background: rgba(102,196,255,0.18) !important; }
  .panel__pills .pill:nth-child(4n+2){ background: rgba(255,192,103,0.22) !important; }
  .panel__pills .pill:nth-child(4n+3){ background: rgba(102,244,255,0.18) !important; }
  .panel__pills .pill:nth-child(4n+4){ background: rgba(125,153,170,0.16) !important; }
  
  /* ---------- small helper banner above graph (your instruction pill bar) ---------- */
  .callout, .hint, .graph-hint, .graph__hint{
    background: rgba(102,244,255,0.14) !important;
    border: 1px solid rgba(102,196,255,0.35) !important;
    color: var(--muted) !important;
    border-radius: 14px;
  }
  
  /* ---------- reduce “vibe” effects globally ---------- */
  *{
    text-shadow: none !important;
  }