/* ===================================================================
   Style guide for DFP Portfolio
   =================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Roboto+Mono:ital,wght@0,300..700;1,300..700&display=swap');

/* ── Design Tokens ─────────────────────────────────────────── */
:root {
  /* Colors */
  --color-bg: #080c08;
  --color-surface: #0d120d;
  --color-surface-2: #111811;
  --color-surface-offset: #141e14;
  --color-border: rgba(57, 255, 20, 0.12);
  --color-divider: rgba(57, 255, 20, 0.08);

  --color-text: #c8e6c8;
  --color-text-muted: #7aab7a;
  --color-text-faint: #3d6b3d;

  --color-accent: #39ff14;
  /* neon green */
  --color-accent-soft: #7aff4a;
  --color-accent-dim: #2a9912;
  --color-accent-glow: rgba(57, 255, 20, 0.18);
  --color-accent-bg: rgba(57, 255, 20, 0.06);

  /* Typography */
  --font-body: 'Roboto Mono', 'Courier New', monospace;

  /* Type scale */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --text-hero: clamp(2.2rem, 1rem + 4vw, 4.5rem);

  /* 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;

  /* Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;

  /* Layout */
  --content-default: 960px;
  --content-wide: 1200px;

  /* Transitions */
  --transition: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Shadows */
  --shadow-glow: 0 0 12px rgba(57, 255, 20, 0.25);
  --shadow-card: 0 2px 16px rgba(0, 0, 0, 0.6);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--space-16);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100dvh;
  line-height: 1.7;
  overflow-x: hidden;
}

/* Scanline overlay */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(0deg,
      transparent,
      transparent 2px,
      rgba(0, 0, 0, 0.07) 2px,
      rgba(0, 0, 0, 0.07) 4px);
  pointer-events: none;
  z-index: 9999;
}

img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
}

ul[role="list"],
ol[role="list"] {
  list-style: none;
}

input,
button,
textarea,
select {
  font: inherit;
  color: inherit;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-body);
  font-weight: 700;
  line-height: 1.2;
  text-wrap: balance;
  color: var(--color-accent-soft);
}

p,
li {
  text-wrap: pretty;
}

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

a:hover {
  color: var(--color-accent-soft);
  text-shadow: 0 0 8px var(--color-accent);
}

::selection {
  background: rgba(57, 255, 20, 0.25);
  color: var(--color-accent-soft);
}

:focus-visible {
  outline: 1px solid var(--color-accent);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ── Layout Utilities ───────────────────────────────────────── */
.container {
  max-width: var(--content-default);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.container--wide {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

section {
  padding-block: clamp(var(--space-12), 6vw, var(--space-24));
  border-bottom: 1px solid var(--color-divider);
}

/* ── Cogitator Headings (>>> prefix) ────────────────────────── */
h2::before,
h3::before {
  content: '>>> ';
  color: var(--color-accent);
  font-weight: 400;
  opacity: 0.85;
}

h2 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-8);
  letter-spacing: -0.02em;
}

h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-4);
}

/* ── Navigation ─────────────────────────────────────────────── */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(8, 12, 8, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-3) 0;
}

nav .nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}

nav .logo {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 0.05em;
  text-shadow: 0 0 10px var(--color-accent);
}

nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-6);
  list-style: none;
}

nav ul a {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: color var(--transition);
}

nav ul a:hover {
  color: var(--color-accent);
  text-shadow: 0 0 6px var(--color-accent);
}

/* ── Hero ───────────────────────────────────────────────────── */
#hero {
  min-height: 92vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-block: var(--space-24);
  border-bottom: 1px solid var(--color-divider);
  position: relative;
  overflow: hidden;
}

#hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 50% at 50% 60%, rgba(57, 255, 20, 0.04) 0%, transparent 70%);
  pointer-events: none;
}

.hero-tag {
  display: inline-block;
  font-size: var(--text-xs);
  color: var(--color-accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: var(--space-6);
  opacity: 0.8;
}

.hero-name {
  font-size: var(--text-hero);
  font-weight: 700;
  color: var(--color-accent-soft);
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: var(--space-6);
  text-shadow: 0 0 40px rgba(57, 255, 20, 0.2);
}

.hero-title {
  font-size: var(--text-lg);
  color: var(--color-text);
  font-weight: 300;
  margin-bottom: var(--space-4);
  max-width: 60ch;
}

.hero-headshot {
  width: 240px;
  height: 240px;
  object-fit: cover;
  border-radius: 50%;
  border: 2px solid var(--color-accent);
  box-shadow: 0 0 24px rgba(57, 255, 20, 0.18);
  margin-bottom: var(--space-6);
}

.hero-sub {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  max-width: 55ch;
  margin-bottom: var(--space-10);
  line-height: 1.8;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-sm);
  font-family: var(--font-body);
  font-weight: 600;
  letter-spacing: 0.06em;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}

.btn--primary {
  background: var(--color-accent);
  color: #080c08;
  border: 1px solid var(--color-accent);
}

.btn--primary:hover {
  background: var(--color-accent-soft);
  box-shadow: var(--shadow-glow);
  color: #080c08;
  text-shadow: none;
}

.btn--ghost {
  background: transparent;
  color: var(--color-accent);
  border: 1px solid var(--color-border);
}

.btn--ghost:hover {
  border-color: var(--color-accent);
  box-shadow: 0 0 8px var(--color-accent-glow);
}

/* Blinking cursor */
.cursor {
  display: inline-block;
  width: 3px;
  height: 1em;
  background: var(--color-accent);
  margin-left: var(--space-1);
  vertical-align: middle;
  animation: blink 1.1s step-end infinite;
}

@keyframes blink {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0;
  }
}

/* ── About / Overview ───────────────────────────────────────── */
#about .about-grid {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: var(--space-12);
  align-items: start;
}

@media (max-width: 768px) {
  #about .about-grid {
    grid-template-columns: 1fr;
  }
}

.about-body p {
  color: var(--color-text);
  margin-bottom: var(--space-5);
  max-width: 68ch;
  line-height: 1.9;
}

/* ── Profile Card ───────────────────────────────────────────── */
.profile-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-card);
  position: sticky;
  top: calc(var(--space-16) + var(--space-4));
}

.profile-card .card-title {
  font-size: var(--text-xs);
  color: var(--color-accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: var(--space-4);
  font-weight: 600;
}

.profile-card .card-title::before {
  content: none;
}

.profile-card h3::before {
  content: none;
}

.profile-card h3 {
  font-size: var(--text-base);
  color: var(--color-accent-soft);
  margin-bottom: var(--space-1);
}

.profile-card .card-subtitle {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
}

.card-section {
  margin-bottom: var(--space-5);
}

.card-section-label {
  font-size: var(--text-xs);
  color: var(--color-accent-dim);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--space-2);
  font-weight: 600;
}

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

.tag {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  background: var(--color-accent-bg);
  color: var(--color-accent-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

.edu-item {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
  padding-left: var(--space-3);
  border-left: 2px solid var(--color-accent-dim);
  line-height: 1.5;
}

.edu-item strong {
  color: var(--color-text);
  display: block;
}

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

.social-links a {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  transition: color var(--transition);
}

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

.social-links a::before {
  content: '↗ ';
  font-size: 0.7em;
  opacity: 0.7;
}

/* ── Experience ─────────────────────────────────────────────── */
.experience-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.exp-item {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: var(--space-8);
  padding-bottom: var(--space-8);
  border-bottom: 1px solid var(--color-divider);
}

.exp-item:last-child {
  border-bottom: none;
}

@media (max-width: 640px) {
  .exp-item {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
}

.exp-meta {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  line-height: 1.7;
}

.exp-meta .exp-dates {
  color: var(--color-accent-dim);
  font-weight: 600;
  display: block;
  margin-bottom: var(--space-1);
}

.exp-meta .exp-location {
  color: var(--color-text-faint);
}

.exp-content h3 {
  font-size: var(--text-base);
  color: var(--color-text);
  margin-bottom: var(--space-1);
  font-weight: 700;
}

.exp-content h3::before {
  content: none;
}

.exp-content .exp-org {
  font-size: var(--text-sm);
  color: var(--color-accent-dim);
  margin-bottom: var(--space-4);
}

.exp-content ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.exp-content ul li {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  padding-left: var(--space-5);
  position: relative;
  line-height: 1.7;
  max-width: 70ch;
}

.exp-content ul li::before {
  content: '> ';
  position: absolute;
  left: 0;
  color: var(--color-accent-dim);
}

/* ── Work / Projects ────────────────────────────────────────── */
.work-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(280px, 100%), 1fr));
  gap: var(--space-6);
}

.work-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-card);
  transition: border-color var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.work-card:hover {
  border-color: rgba(57, 255, 20, 0.35);
  box-shadow: 0 0 20px rgba(57, 255, 20, 0.08);
}

.work-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-3);
}

.work-card-title {
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-accent-soft);
}

.work-card-year {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  white-space: nowrap;
  flex-shrink: 0;
}

.work-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
}

.work-card-section {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.6;
}

.work-card-section strong {
  color: var(--color-accent-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.7em;
  display: block;
  margin-bottom: var(--space-1);
}

.work-card-link {
  margin-top: auto;
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-accent-dim);
}

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

/* ── Collaboration Graph ────────────────────────────────────── */
#graph-section .graph-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: var(--space-8);
  align-items: start;
}

@media (max-width: 768px) {
  #graph-section .graph-layout {
    grid-template-columns: 1fr;
  }
}

#collab-graph {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  width: 100%;
  height: 520px;
  overflow: hidden;
}

.graph-legend {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.legend-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  flex-shrink: 0;
}

#paper-panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  min-height: 200px;
}

#paper-panel .panel-empty {
  color: var(--color-text-faint);
  font-size: var(--text-xs);
  font-style: italic;
}

#paper-panel .paper-title {
  font-size: var(--text-sm);
  color: var(--color-accent-soft);
  font-weight: 700;
  margin-bottom: var(--space-3);
  line-height: 1.4;
}

#paper-panel .paper-title::before {
  content: none;
}

#paper-panel .paper-venue {
  font-size: var(--text-xs);
  color: var(--color-accent-dim);
  margin-bottom: var(--space-2);
  letter-spacing: 0.05em;
}

#paper-panel .paper-authors {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  line-height: 1.6;
}

#paper-panel .paper-link {
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
}

/* D3 tooltip */
.d3-tooltip {
  position: absolute;
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  pointer-events: none;
  white-space: nowrap;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.6);
  z-index: 200;
  opacity: 0;
  transition: opacity 0.15s;
}

/* ── Now / Next ─────────────────────────────────────────────── */
#now .now-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
}

@media (max-width: 640px) {
  #now .now-grid {
    grid-template-columns: 1fr;
  }
}

.now-block {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.now-block h3 {
  margin-bottom: var(--space-4);
}

.now-block ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.now-block ul li {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  padding-left: var(--space-5);
  position: relative;
  line-height: 1.7;
}

.now-block ul li::before {
  content: '⬡ ';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-size: 0.75em;
}

/* ── Footer ─────────────────────────────────────────────────── */
footer {
  padding: var(--space-8) 0;
  border-top: 1px solid var(--color-divider);
  text-align: center;
}

footer p {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  max-width: 100%;
}

footer a {
  color: var(--color-accent-dim);
}

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

/* ── Responsive Nav ─────────────────────────────────────────── */
@media (max-width: 640px) {
  nav ul {
    gap: var(--space-4);
  }

  .hero-name {
    letter-spacing: -0.02em;
  }

  #about .about-grid {
    grid-template-columns: 1fr;
  }
}

/* ── Easter egg popups ───────────────────────────────────────── */

.easter-egg-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9000;
}

.easter-egg-modal {
  max-width: min(420px, 90vw);
  padding: var(--space-6);
  background: radial-gradient(circle at 10% 0%, rgba(57, 255, 20, 0.15), transparent 55%),
    var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-accent);
  box-shadow: 0 0 32px rgba(57, 255, 20, 0.55);
  position: relative;
  text-align: center;
  overflow: hidden;
}

.easter-egg-modal--glitch {
  animation: easter-glitch 750ms infinite;
}

.easter-egg-title {
  font-size: var(--text-lg);
  color: var(--color-accent-soft);
  text-shadow: 0 0 12px rgba(57, 255, 20, 0.7);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  line-height: 1.4;
  margin-bottom: var(--space-4);
}

.easter-egg-gif {
  max-width: min(260px, 70vw);
  margin: 0 auto var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  box-shadow: 0 0 18px rgba(57, 255, 20, 0.35);
}

.easter-egg-subtext {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-top: var(--space-2);
}

/* Glitchy border / chromatic aberration */
.easter-egg-modal--glitch::before,
.easter-egg-modal--glitch::after {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: inherit;
  mix-blend-mode: screen;
  pointer-events: none;
}

.easter-egg-modal--glitch::before {
  border: 1px solid rgba(255, 0, 128, 0.55);
  transform: translate(2px, -2px);
}

.easter-egg-modal--glitch::after {
  border: 1px solid rgba(0, 200, 255, 0.55);
  transform: translate(-2px, 2px);
}

@keyframes easter-glitch {
  0% {
    transform: translate(0, 0);
    filter: hue-rotate(0deg);
  }

  20% {
    transform: translate(-2px, 1px);
  }

  40% {
    transform: translate(2px, -1px);
    filter: hue-rotate(10deg);
  }

  60% {
    transform: translate(-1px, 2px);
  }

  80% {
    transform: translate(1px, -2px);
    filter: hue-rotate(-8deg);
  }

  100% {
    transform: translate(0, 0);
    filter: hue-rotate(0deg);
  }
}