/* ============================================ */
/* Blockchain Projects — Futuristic Theme       */
/* Same palette as main portfolio + cyber glow  */
/* ============================================ */

@font-face {
  font-family: "Mona Sans";
  src: url("assets/fonts/Mona-Sans.woff2") format("woff2 supports variations"),
    url("assets/fonts/Mona-Sans.woff2") format("woff2-variations");
  font-display: swap;
  font-weight: 200 900;
  font-stretch: 75% 125%;
}

/* ---------- CSS Variables ---------- */

:root {
  --h1: 4rem;
  --h2: 2rem;
  --h3: 1.5rem;
  --text-large: 1.5rem;
  --text-medium: 1.15rem;
  --text-small: 1rem;

  --site-max-width: 1200px;
  --gutter-nano: 0.5rem;
  --gutter-micro: 1rem;
  --gutter-small: 1.5rem;
  --gutter-medium: 2rem;
  --gutter-large: 3rem;
  --gutter-x-large: 5rem;

  --gold-primary: #FFD700;
  --gold-secondary: #F7931A;
  --gold-accent: #FFA500;

  /* Accent aliases */
  --neon-pink: #ffb84d;
  --neon-green: var(--gold-primary);
  --neon-cyan: var(--gold-secondary);
  --neon-yellow: #fff0a8;
  --neon-purple: #d7aefb;

  --glow-pink: rgba(255, 191, 73, 0.28);
  --glow-green: rgba(255, 215, 0, 0.28);
  --glow-cyan: rgba(247, 147, 26, 0.24);

  --easing: cubic-bezier(0.86, 0, 0.07, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

body.dark {
  --bg-primary: #0a0a0f;
  --bg-secondary: #111118;
  --bg-card: #12121a;
  --bg-card-hover: #18182a;
  --important: #ffffff;
  --sub: #c3c3c3;
  --body: #8a8a9a;
  --border: rgba(255, 255, 255, 0.06);
  --border-glow: rgba(255, 255, 255, 0.1);
  --glass-bg: rgba(18, 18, 26, 0.7);
  --glass-border: rgba(255, 255, 255, 0.08);
}

body.light {
  --bg-primary: #050507;
  --bg-secondary: #0A0A0F;
  --bg-card: #12121a;
  --bg-card-hover: #18182a;
  --important: #ffffff;
  --sub: #d3d3de;
  --body: #a8a8bb;
  --border: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(255, 215, 0, 0.2);
  --glass-bg: rgba(18, 18, 26, 0.7);
  --glass-border: rgba(255, 215, 0, 0.14);
  --neon-pink: #ffb84d;
  --neon-green: var(--gold-primary);
  --neon-cyan: var(--gold-secondary);
  --glow-pink: rgba(255, 191, 73, 0.18);
  --glow-green: rgba(255, 215, 0, 0.18);
  --glow-cyan: rgba(247, 147, 26, 0.16);
}

/* ---------- Reset ---------- */

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

html {
  font-family: "Mona Sans", sans-serif;
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  background-color: var(--bg-primary);
  color: var(--body);
  font-size: var(--text-medium);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}

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

/* ---------- Particle Canvas ---------- */

#cloud-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* ---------- Scanline Overlay ---------- */

.scanline-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.03) 2px,
    rgba(0, 0, 0, 0.03) 4px
  );
}

body.light .scanline-overlay {
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.015) 2px,
    rgba(0, 0, 0, 0.015) 4px
  );
}

/* ---------- Container ---------- */

.bc-container {
  max-width: var(--site-max-width);
  margin: 0 auto;
  padding: 0 var(--gutter-medium);
  position: relative;
  z-index: 2;
}

/* ---------- Navigation ---------- */

.bc-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  padding: var(--gutter-micro) 0;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  transition: background 0.3s ease;
}

.bc-nav .bc-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.bc-back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--important);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  transition: color 0.3s, gap 0.3s;
}

.bc-back-link:hover {
  color: var(--neon-cyan);
  gap: 0.75rem;
}

.bc-back-link svg {
  transition: transform 0.3s;
}

.bc-back-link:hover svg {
  transform: translateX(-3px);
}

.bc-nav-right {
  display: flex;
  align-items: center;
  gap: var(--gutter-small);
}

.bc-chain-status {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--neon-green);
}

.bc-status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--neon-green);
  box-shadow: 0 0 8px var(--neon-green), 0 0 20px var(--glow-green);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.85); }
}

/* Theme toggle (blockchain page) */
.bc-theme-switch {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  cursor: pointer;
  user-select: none;
}

.bc-theme-switch span {
  font-size: 0.85rem;
  color: var(--sub);
  font-weight: 600;
}

.bc-theme-switch input {
  -webkit-appearance: none;
  appearance: none;
  width: 40px;
  height: 22px;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.15);
  cursor: pointer;
  position: relative;
  transition: background 0.3s;
}

.bc-theme-switch input::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--important);
  transition: transform 0.4s cubic-bezier(0.45, 0.05, 0.22, 1.3);
}

.bc-theme-switch input:checked::after {
  transform: translateX(18px);
}

.bc-theme-switch input:checked {
  background: var(--neon-purple);
}

/* ---------- Hero Section ---------- */

.bc-hero {
  min-height: 80vh;
  display: flex;
  align-items: center;
  padding: 8rem 0 4rem;
  position: relative;
  overflow: hidden;
}

.bc-hero::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -30%;
  width: 160%;
  height: 200%;
  background: radial-gradient(
      ellipse at 30% 50%,
      var(--glow-pink) 0%,
      transparent 50%
    ),
    radial-gradient(
      ellipse at 70% 30%,
      var(--glow-green) 0%,
      transparent 50%
    ),
    radial-gradient(
      ellipse at 50% 80%,
      var(--glow-cyan) 0%,
      transparent 40%
    );
  z-index: 0;
  animation: hero-glow 12s ease-in-out infinite alternate;
}

@keyframes hero-glow {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(2%, -3%) scale(1.05); }
  100% { transform: translate(-1%, 2%) scale(0.98); }
}

.bc-hero-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
}

.bc-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--neon-green);
  padding: 0.4rem 1rem;
  border: 1px solid rgba(255, 215, 0, 0.3);
  border-radius: 100px;
  margin-bottom: var(--gutter-medium);
  backdrop-filter: blur(10px);
  animation: badge-fade 1s var(--ease-out) both;
}

.bc-badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--neon-green);
  animation: pulse-dot 1.5s ease-in-out infinite;
}

@keyframes badge-fade {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.bc-hero-title {
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 900;
  font-stretch: 125%;
  line-height: 1.05;
  color: var(--important);
  margin-bottom: var(--gutter-small);
  animation: title-slide 0.8s var(--ease-out) 0.15s both;
}

.bc-hero-title span {
  display: block;
}

@keyframes title-slide {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Glitch effect */
.bc-glitch {
  position: relative;
  display: inline-block;
}

.bc-glitch::before,
.bc-glitch::after {
  content: attr(data-text);
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.bc-glitch::before {
  color: var(--neon-pink);
  z-index: -1;
  animation: glitch-1 3s infinite linear alternate-reverse;
}

.bc-glitch::after {
  color: var(--neon-cyan);
  z-index: -2;
  animation: glitch-2 2.5s infinite linear alternate-reverse;
}

@keyframes glitch-1 {
  0%, 95% { clip-path: inset(0 0 0 0); transform: translate(0); }
  96% { clip-path: inset(20% 0 60% 0); transform: translate(-3px, 1px); }
  97% { clip-path: inset(50% 0 30% 0); transform: translate(3px, -1px); }
  98% { clip-path: inset(10% 0 70% 0); transform: translate(-2px, 2px); }
  99% { clip-path: inset(60% 0 10% 0); transform: translate(2px, -2px); }
  100% { clip-path: inset(0 0 0 0); transform: translate(0); }
}

@keyframes glitch-2 {
  0%, 93% { clip-path: inset(0 0 0 0); transform: translate(0); }
  94% { clip-path: inset(40% 0 30% 0); transform: translate(2px, -1px); }
  96% { clip-path: inset(15% 0 55% 0); transform: translate(-3px, 2px); }
  98% { clip-path: inset(70% 0 5% 0); transform: translate(1px, -1px); }
  100% { clip-path: inset(0 0 0 0); transform: translate(0); }
}

body.light .bc-glitch::before {
  color: var(--neon-pink);
  opacity: 0.3;
}

body.light .bc-glitch::after {
  color: var(--neon-cyan);
  opacity: 0.3;
}

/* Gradient text */
.bc-gradient-text {
  background: linear-gradient(135deg, var(--neon-cyan), var(--neon-green), var(--neon-yellow));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

body.light .bc-gradient-text {
  background: linear-gradient(135deg, var(--neon-cyan), var(--neon-green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.bc-hero-desc {
  font-size: var(--text-large);
  color: var(--sub);
  max-width: 600px;
  line-height: 1.7;
  margin-bottom: var(--gutter-large);
  animation: title-slide 0.8s var(--ease-out) 0.3s both;
}

/* Hero stats */
.bc-hero-stats {
  display: flex;
  align-items: center;
  gap: var(--gutter-medium);
  animation: title-slide 0.8s var(--ease-out) 0.45s both;
}

.bc-stat {
  text-align: center;
}

.bc-stat-number {
  display: block;
  font-size: 2.2rem;
  font-weight: 900;
  font-stretch: 125%;
  color: var(--important);
  line-height: 1;
}

.bc-stat-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--body);
  margin-top: 0.3rem;
}

.bc-stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border-glow);
}

/* ---------- Main / Projects Grid ---------- */

.bc-main {
  padding: var(--gutter-x-large) 0;
  position: relative;
  z-index: 2;
}

.bc-main .bc-container {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--gutter-medium);
}

@media (max-width: 900px) {
  .bc-main .bc-container {
    grid-template-columns: 1fr;
  }
}

/* ---------- Project Card ---------- */

.bc-project-card {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  transition: transform 0.5s var(--ease-out), box-shadow 0.5s ease;
  opacity: 0;
  transform: translateY(40px);
  animation: card-appear 0.7s var(--ease-out) both;
}

.bc-project-card:nth-child(1) { animation-delay: 0.1s; }
.bc-project-card:nth-child(2) { animation-delay: 0.2s; }
.bc-project-card:nth-child(3) { animation-delay: 0.3s; }
.bc-project-card:nth-child(4) { animation-delay: 0.4s; }
.bc-project-card:nth-child(5) { animation-delay: 0.5s; }
.bc-project-card:nth-child(6) { animation-delay: 0.6s; }

@keyframes card-appear {
  to { opacity: 1; transform: translateY(0); }
}

.bc-project-card:hover {
  transform: translateY(-6px);
}

body.dark .bc-project-card:hover {
  box-shadow:
    0 20px 60px rgba(0, 0, 0, 0.4),
    0 0 40px var(--glow-green);
}

body.light .bc-project-card:hover {
  box-shadow:
    0 20px 60px rgba(0, 0, 0, 0.08),
    0 0 30px var(--glow-green);
}

/* Card glow border */
.bc-card-glow {
  position: absolute;
  inset: 0;
  border-radius: 16px;
  padding: 1px;
  background: linear-gradient(
    135deg,
    var(--neon-green),
    transparent 40%,
    transparent 60%,
    var(--neon-pink)
  );
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.5s ease;
  z-index: 1;
}

.bc-project-card:hover .bc-card-glow {
  opacity: 1;
}

/* Card inner */
.bc-card-inner {
  position: relative;
  z-index: 2;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: var(--gutter-medium);
  height: 100%;
  display: flex;
  flex-direction: column;
  transition: background 0.3s, border-color 0.3s;
}

.bc-project-card:hover .bc-card-inner {
  background: var(--bg-card-hover);
  border-color: var(--border-glow);
}

/* Card header */
.bc-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--gutter-small);
}

.bc-chain-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--neon-green);
  background: rgba(255, 215, 0, 0.08);
  padding: 0.3rem 0.8rem;
  border-radius: 100px;
  border: 1px solid rgba(255, 215, 0, 0.15);
}

.bc-chain-icon {
  font-size: 0.6rem;
}

.bc-card-number {
  font-size: 2.5rem;
  font-weight: 900;
  font-stretch: 125%;
  color: var(--border-glow);
  line-height: 1;
  user-select: none;
}

/* Card title */
.bc-card-title {
  font-size: var(--h2);
  font-weight: 800;
  font-stretch: 125%;
  color: var(--important);
  line-height: 1.2;
  margin-bottom: var(--gutter-micro);
  transition: color 0.3s;
}

.bc-project-card:hover .bc-card-title {
  background: linear-gradient(135deg, var(--important) 30%, var(--neon-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

body.light .bc-project-card:hover .bc-card-title {
  background: linear-gradient(135deg, var(--important) 30%, var(--neon-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Card description */
.bc-card-desc {
  font-size: var(--text-small);
  color: var(--body);
  line-height: 1.7;
  margin-bottom: var(--gutter-small);
  flex-grow: 1;
}

/* Tech pills */
.bc-card-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: var(--gutter-medium);
}

.bc-tech-pill {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 0.25rem 0.65rem;
  border-radius: 100px;
  border: 1px solid var(--border-glow);
  color: var(--sub);
  background: transparent;
  transition: all 0.3s ease;
}

.bc-project-card:hover .bc-tech-pill {
  border-color: rgba(255, 215, 0, 0.25);
  color: var(--important);
}

body.dark .bc-project-card:hover .bc-tech-pill {
  background: rgba(255, 215, 0, 0.06);
}

body.light .bc-project-card:hover .bc-tech-pill {
  background: rgba(255, 215, 0, 0.06);
}

/* Card footer */
.bc-card-footer {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  padding-top: var(--gutter-micro);
  border-top: 1px solid var(--border);
}

.bc-card-metrics {
  display: flex;
  gap: var(--gutter-small);
}

.bc-metric {
  text-align: left;
}

.bc-metric-value {
  display: block;
  font-size: 1rem;
  font-weight: 800;
  color: var(--important);
  font-stretch: 125%;
}

.bc-metric-label {
  display: block;
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--body);
}

/* Card link button */
.bc-link-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--important);
  padding: 0.5rem 1.2rem;
  border: 1px solid var(--border-glow);
  border-radius: 8px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.bc-link-btn::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--glow-green), var(--glow-cyan));
  opacity: 0;
  transition: opacity 0.3s;
}

.bc-link-btn:hover::before {
  opacity: 1;
}

.bc-link-btn:hover {
  border-color: var(--neon-green);
  color: var(--important);
  box-shadow: 0 0 20px var(--glow-green);
}

.bc-link-btn svg,
.bc-link-btn span {
  position: relative;
  z-index: 1;
}

body.dark .bc-link-btn svg {
  filter: invert(1);
}

body.dark .bc-link-btn:hover svg {
  filter: none;
}

/* ---------- Chain-specific accent colors ---------- */

.bc-project-card[data-chain="ethereum"] .bc-chain-tag {
  color: #627eea;
  background: rgba(98, 126, 234, 0.08);
  border-color: rgba(98, 126, 234, 0.2);
}

.bc-project-card[data-chain="polygon"] .bc-chain-tag {
  color: #8247e5;
  background: rgba(130, 71, 229, 0.08);
  border-color: rgba(130, 71, 229, 0.2);
}

.bc-project-card[data-chain="hyperledger"] .bc-chain-tag {
  color: #2fa4e7;
  background: rgba(47, 164, 231, 0.08);
  border-color: rgba(47, 164, 231, 0.2);
}

.bc-project-card[data-chain="multichain"] .bc-chain-tag {
  color: var(--neon-yellow);
  background: rgba(255, 249, 89, 0.06);
  border-color: rgba(255, 249, 89, 0.2);
}

/* ---------- Footer ---------- */

.bc-footer {
  position: relative;
  z-index: 2;
  border-top: 1px solid var(--border);
  padding: var(--gutter-large) 0;
  margin-top: var(--gutter-x-large);
}

.bc-footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--gutter-medium);
}

.bc-footer-back {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--sub);
  transition: color 0.3s;
}

.bc-footer-back:hover {
  color: var(--neon-cyan);
}

.bc-footer-links {
  display: flex;
  gap: var(--gutter-small);
}

.bc-footer-links a {
  color: var(--body);
  opacity: 0.7;
  transition: opacity 0.3s, color 0.3s, transform 0.3s;
}

.bc-footer-links a:hover {
  opacity: 1;
  color: var(--neon-green);
  transform: translateY(-2px);
}

body.dark .bc-footer-links a svg {
  filter: none;
}

.bc-footer-bottom {
  text-align: center;
  font-size: 0.8rem;
  color: var(--body);
  opacity: 0.5;
}

/* ---------- Responsive ---------- */

@media (max-width: 768px) {
  :root {
    --h1: 2.5rem;
    --h2: 1.5rem;
    --text-large: 1.2rem;
  }

  .bc-hero {
    min-height: auto;
    padding: 7rem 0 3rem;
  }

  .bc-hero-stats {
    flex-wrap: wrap;
    gap: var(--gutter-micro);
  }

  .bc-stat-divider {
    display: none;
  }

  .bc-stat {
    flex: 1;
    min-width: 80px;
    padding: 0.5rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--glass-bg);
  }

  .bc-card-inner {
    padding: var(--gutter-small);
  }

  .bc-card-number {
    font-size: 1.8rem;
  }

  .bc-card-footer {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--gutter-micro);
  }

  .bc-footer-content {
    flex-direction: column;
    gap: var(--gutter-micro);
    text-align: center;
  }

  .bc-nav-right {
    gap: 0.5rem;
  }

  .bc-chain-status span:last-child {
    display: none;
  }
}

@media (max-width: 480px) {
  :root {
    --h1: 2rem;
    --h2: 1.3rem;
  }

  .bc-container {
    padding: 0 var(--gutter-micro);
  }

  .bc-hero-title {
    font-size: 2rem;
  }
}

/* ---------- Focus States ---------- */

:focus-visible {
  outline: 2px solid var(--neon-green);
  outline-offset: 3px;
  border-radius: 4px;
}

a:focus:not(:focus-visible) {
  outline: none;
}

/* ---------- Reduced Motion ---------- */

@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;
  }

  .bc-glitch::before,
  .bc-glitch::after {
    display: none;
  }

  #particle-canvas {
    display: none;
  }
}

/* ---------- Selection ---------- */

::selection {
  background: var(--neon-green);
  color: #000;
}