/* ============================================
   STARTUP GRAVEYARD — style.css
   Dark graveyard memorial theme
   ============================================ */

/* --- Design Tokens --- */
:root {
  /* 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,     0.9rem  + 0.5vw,  1.125rem);
  --text-lg:   clamp(1.125rem, 0.95rem + 0.85vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1rem    + 1.5vw,  2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);
  --text-hero: clamp(3rem,     0.5rem  + 7vw,    8rem);

  /* 4px 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;
  --space-32: 8rem;

  /* Graveyard Palette — dark-only */
  --color-bg:          #0a0a0c;
  --color-surface:     #111114;
  --color-surface-2:   #18181c;
  --color-surface-3:   #1e1e24;
  --color-divider:     #2a2a32;
  --color-border:      #333340;

  --color-text:        #e8e4de;
  --color-text-muted:  #8a8680;
  --color-text-faint:  #5a5854;

  --color-accent:      #c9a96e;
  --color-accent-dim:  #a08550;
  --color-accent-glow: rgba(201, 169, 110, 0.15);

  /* Fonts */
  --font-display: 'Playfair Display', 'Georgia', serif;
  --font-body: 'Inter', 'Helvetica Neue', sans-serif;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

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

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.4);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.5);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.6);

  /* Content */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;

  /* Sector Colors */
  --clr-aerospace: #6b8fa3;
  --clr-crypto: #a07cc5;
  --clr-ecommerce: #c97a6e;
  --clr-edtech: #7aad7e;
  --clr-energy: #5da899;
  --clr-enterprise: #7a8fb5;
  --clr-fintech: #c9a96e;
  --clr-food: #d4816b;
  --clr-hardware: #8a8fa3;
  --clr-health: #b5707a;
  --clr-logistics: #8a9977;
  --clr-media: #c48cb3;
  --clr-realestate: #9a8a6e;
  --clr-social: #6e9ac9;
  --clr-transport: #7eb5a0;
  --clr-travel: #b09570;
}

/* ============================================
   BASE RESETS
   ============================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -moz-text-size-adjust: none;
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: var(--space-16);
}

body {
  min-height: 100dvh;
  line-height: 1.6;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  overflow-x: hidden;
}

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

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

h1, h2, h3, h4, h5, h6 {
  text-wrap: balance;
  line-height: 1.15;
  font-family: var(--font-display);
}

p, li, figcaption {
  text-wrap: pretty;
  max-width: 72ch;
}

::selection {
  background: var(--color-accent-glow);
  color: var(--color-text);
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

button {
  cursor: pointer;
  background: none;
  border: none;
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border-width: 0;
}

.skip-link:focus {
  position: fixed;
  top: var(--space-4);
  left: var(--space-4);
  width: auto; height: auto;
  clip: auto;
  padding: var(--space-2) var(--space-4);
  background: var(--color-accent);
  color: var(--color-bg);
  border-radius: var(--radius-sm);
  z-index: 10000;
  font-size: var(--text-sm);
}

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

/* ============================================
   GRAIN OVERLAY
   ============================================ */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  opacity: 0.03;
  pointer-events: none;
  z-index: 9999;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ============================================
   SECTIONS — Scroll reveal
   ============================================ */
.section {
  position: relative;
  padding: clamp(var(--space-12), 8vw, var(--space-32)) clamp(var(--space-4), 4vw, var(--space-12));
}

.section__header {
  max-width: var(--content-wide);
  margin-inline: auto;
  margin-bottom: var(--space-10);
  text-align: center;
}

.section__title {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: var(--space-3);
  letter-spacing: -0.01em;
}

.section__desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 50ch;
  margin-inline: auto;
}

/* Fade-in on scroll */
.fade-in {
  opacity: 1;
}

@supports (animation-timeline: scroll()) {
  .fade-in {
    opacity: 0;
    animation: reveal-fade linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 60%;
  }
}
@keyframes reveal-fade { to { opacity: 1; } }

/* ============================================
   HERO
   ============================================ */
.hero {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  overflow: hidden;
  background: radial-gradient(ellipse at 50% 80%, #15141a 0%, var(--color-bg) 70%);
}

.hero__fog {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(ellipse at 30% 70%, rgba(201,169,110,0.04) 0%, transparent 50%),
              radial-gradient(ellipse at 70% 30%, rgba(100,100,140,0.05) 0%, transparent 50%);
  animation: fog-drift 20s ease-in-out infinite alternate;
}
.hero__fog--2 {
  animation-delay: -10s;
  animation-direction: alternate-reverse;
  background: radial-gradient(ellipse at 60% 80%, rgba(201,169,110,0.03) 0%, transparent 50%),
              radial-gradient(ellipse at 20% 40%, rgba(80,80,120,0.04) 0%, transparent 50%);
}
@keyframes fog-drift {
  0%   { transform: translate(-2%, -1%) scale(1); }
  100% { transform: translate(2%, 1%) scale(1.05); }
}

.hero__content {
  position: relative;
  z-index: 1;
}

.hero__title {
  font-size: var(--text-hero);
  font-weight: 900;
  color: var(--color-text);
  letter-spacing: -0.03em;
  line-height: 1.0;
  margin-bottom: var(--space-6);
  opacity: 0;
  animation: hero-fade-in 1.2s var(--ease-out) 0.2s forwards;
}

.hero__subtitle {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  line-height: 1.6;
  opacity: 0;
  animation: hero-fade-in 1.2s var(--ease-out) 0.6s forwards;
}

.hero__funding {
  color: var(--color-accent);
  font-weight: 600;
  font-variant-numeric: tabular-nums lining-nums;
}

.hero__count {
  color: var(--color-accent);
  font-weight: 600;
}

@keyframes hero-fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

.hero__scroll-indicator {
  position: absolute;
  bottom: var(--space-8);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text-faint);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  opacity: 0;
  animation: hero-fade-in 1s var(--ease-out) 1.5s forwards, bounce 2s ease-in-out 2.5s infinite;
}
@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(6px); }
}

/* ============================================
   GRAVEYARD GRID
   ============================================ */
.graveyard {
  background: linear-gradient(180deg, var(--color-bg) 0%, #0d0d10 50%, var(--color-bg) 100%);
}

.graveyard__search-wrap {
  margin-top: var(--space-6);
}

.graveyard__search {
  width: 100%;
  max-width: 360px;
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text);
  font-size: var(--text-sm);
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}
.graveyard__search::placeholder {
  color: var(--color-text-faint);
}
.graveyard__search:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-glow);
  outline: none;
}

.graveyard__grid {
  max-width: var(--content-wide);
  margin-inline: auto;
  columns: 5 180px;
  column-gap: var(--space-4);
  content-visibility: auto;
  contain-intrinsic-size: auto 120000px;
}

.tombstone {
  break-inside: avoid;
  margin-bottom: var(--space-4);
  cursor: pointer;
  position: relative;
  transition: transform var(--transition-interactive), box-shadow var(--transition-interactive);
}
.tombstone:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(201,169,110,0.08);
}
.tombstone:active {
  transform: translateY(0);
}

.tombstone__inner {
  background: var(--color-surface);
  border: 1px solid rgba(255,255,255,0.05);
  border-radius: var(--space-6) var(--space-6) var(--radius-sm) var(--radius-sm);
  padding: var(--space-5) var(--space-3) var(--space-4);
  text-align: center;
  position: relative;
  overflow: hidden;
}

/* Slight shade variation */
.tombstone:nth-child(3n) .tombstone__inner { background: #121216; }
.tombstone:nth-child(5n) .tombstone__inner { background: #101013; }
.tombstone:nth-child(7n) .tombstone__inner { background: #131318; }

/* Stone texture line at top */
.tombstone__inner::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.06), transparent);
}

.tombstone__name {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-1);
  line-height: 1.3;
}

.tombstone__years {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
  margin-bottom: var(--space-2);
}

.tombstone__funding {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.tombstone--hidden {
  display: none;
}

/* ============================================
   CHART SECTIONS
   ============================================ */
.chart-section {
  border-top: 1px solid var(--color-divider);
}

.chart-container {
  max-width: var(--content-wide);
  margin-inline: auto;
  position: relative;
  min-height: 400px;
}

.chart-container--treemap {
  min-height: 500px;
}
.chart-container--wordcloud {
  min-height: 400px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-8) var(--space-4);
}

.chart-legend {
  max-width: var(--content-wide);
  margin-inline: auto;
  margin-top: var(--space-6);
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-3) var(--space-5);
}

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

.chart-legend__dot {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  flex-shrink: 0;
}

/* D3 chart styles */
.chart-container svg {
  width: 100%;
  height: auto;
  display: block;
}

.chart-container svg text {
  font-family: var(--font-body);
  fill: var(--color-text-muted);
}

/* Scatter tooltip */
.scatter-tooltip {
  position: absolute;
  pointer-events: none;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
  color: var(--color-text);
  opacity: 0;
  transition: opacity 120ms;
  z-index: 100;
  white-space: nowrap;
  box-shadow: var(--shadow-md);
}
.scatter-tooltip.visible { opacity: 1; }

/* Treemap */
.treemap-cell {
  cursor: pointer;
  transition: opacity var(--transition-interactive);
}
.treemap-cell:hover { opacity: 0.85; }

.treemap-label {
  font-family: var(--font-body);
  font-weight: 600;
  fill: rgba(255,255,255,0.9);
  pointer-events: none;
}
.treemap-count {
  font-family: var(--font-body);
  font-weight: 400;
  fill: rgba(255,255,255,0.6);
  pointer-events: none;
}

/* Timeline bars */
.timeline-bar {
  cursor: pointer;
  transition: opacity var(--transition-interactive);
}
.timeline-bar:hover { opacity: 0.8; }

/* Word cloud */
.wordcloud-word {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-accent);
  white-space: nowrap;
  opacity: 0.85;
  transition: opacity var(--transition-interactive), transform var(--transition-interactive);
  cursor: default;
  line-height: 1.2;
}
.wordcloud-word:hover {
  opacity: 1;
  transform: scale(1.05);
}

/* ============================================
   MODAL
   ============================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 5000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.75);
  backdrop-filter: blur(4px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 300ms var(--ease-out), visibility 0s 300ms;
  padding: var(--space-4);
}
.modal-overlay.active {
  opacity: 1;
  visibility: visible;
  transition: opacity 300ms var(--ease-out), visibility 0s;
}

.modal-card {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  max-width: 520px;
  width: 100%;
  position: relative;
  transform: scale(0.95);
  transition: transform 300ms var(--ease-out);
  box-shadow: var(--shadow-lg);
}
.modal-overlay.active .modal-card {
  transform: scale(1);
}

.modal-close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 36px; height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--color-text-muted);
  border-radius: var(--radius-full);
  transition: color var(--transition-interactive), background var(--transition-interactive);
}
.modal-close:hover {
  color: var(--color-text);
  background: rgba(255,255,255,0.06);
}

.modal__name {
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: var(--space-2);
  padding-right: var(--space-10);
}

.modal__years {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  letter-spacing: 0.03em;
}

.modal__badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
}

.badge {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.02em;
}
.badge--sector {
  background: var(--color-accent-glow);
  color: var(--color-accent);
  border: 1px solid rgba(201,169,110,0.2);
}
.badge--reason {
  background: rgba(180,100,100,0.12);
  color: #d4816b;
  border: 1px solid rgba(180,100,100,0.2);
}

.modal__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  margin-bottom: var(--space-5);
  padding: var(--space-4);
  background: var(--color-surface-3);
  border-radius: var(--radius-lg);
}

.modal__stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-1);
}

.modal__stat-value {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
  font-variant-numeric: tabular-nums lining-nums;
}

.modal__summary {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  border-top: 1px solid var(--color-divider);
  padding: var(--space-12) var(--space-4);
  text-align: center;
  color: var(--color-text-faint);
  font-size: var(--text-sm);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
  .graveyard__grid {
    columns: 2;
    column-gap: var(--space-3);
  }

  .tombstone {
    margin-bottom: var(--space-3);
  }

  .modal-card {
    padding: var(--space-5);
  }

  .modal__stats {
    grid-template-columns: 1fr 1fr;
  }

  .chart-container {
    min-height: 300px;
  }

  .hero__title {
    font-size: clamp(2.5rem, 0.5rem + 8vw, 5rem);
  }
}

@media (max-width: 480px) {
  .graveyard__grid {
    columns: 2;
    column-gap: var(--space-2);
  }

  .tombstone__inner {
    padding: var(--space-3) var(--space-2) var(--space-3);
  }
}

@media (hover: none) {
  .tombstone:hover {
    transform: none;
    box-shadow: none;
  }
  .tombstone:active {
    transform: scale(0.98);
  }
}