/* -----------------------
   Base + Variables
------------------------ */
:root {
  --bg: #0b0d10;
  --fg: #e7e7e7;
  --muted: #a0a6b3;
  --accent: #7dd3fc;
  --border: #1f2430;
  --card: rgba(15, 20, 27, 0.85);
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial;
}

/* Global image sanity */
.article-body img {
  max-width: 100%;
  height: auto;
  display: block;
}


* {
  box-sizing: border-box;
}

/* -----------------------
   Complex Animated Background System
------------------------ */

/* Layer 1: Elegant morphing mesh gradient */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 90vw 70vh at 25% 35%, rgba(125, 211, 252, 0.14), transparent 70%),
    radial-gradient(ellipse 80vw 85vh at 75% 65%, rgba(147, 51, 234, 0.12), transparent 65%),
    radial-gradient(circle 60vw at 50% 50%, rgba(34, 211, 238, 0.08), transparent 60%),
    linear-gradient(135deg, rgba(59, 130, 246, 0.08), transparent 60%);
  animation: mesh-morph 35s cubic-bezier(0.45, 0.05, 0.55, 0.95) infinite alternate,
             mesh-drift 60s ease-in-out infinite;
  z-index: -6;
  filter: blur(80px);
  opacity: 0.9;
}

@keyframes mesh-morph {
  0% {
    opacity: 0.75;
    transform: scale(1) rotate(0deg);
  }
  50% {
    opacity: 0.95;
    transform: scale(1.05) rotate(1deg);
  }
  100% {
    opacity: 0.8;
    transform: scale(1.02) rotate(-0.5deg);
  }
}

@keyframes mesh-drift {
  0%, 100% {
    background-position: 0% 0%, 100% 100%, 50% 50%, 0% 0%;
  }
  33% {
    background-position: 25% 20%, 75% 80%, 55% 45%, 15% 25%;
  }
  66% {
    background-position: 40% 50%, 60% 50%, 45% 55%, 25% 40%;
  }
}

/* Layer 2: Subtle animated lattice grid */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    repeating-linear-gradient(
      90deg,
      transparent 0px,
      transparent 99px,
      rgba(125, 211, 252, 0.08) 99px,
      rgba(125, 211, 252, 0.08) 100px
    ),
    repeating-linear-gradient(
      0deg,
      transparent 0px,
      transparent 99px,
      rgba(125, 211, 252, 0.08) 99px,
      rgba(125, 211, 252, 0.08) 100px
    );
  animation: lattice-drift 60s linear infinite;
  z-index: -4;
  opacity: 0.6;
}

@keyframes lattice-drift {
  from {
    transform: translate(0, 0);
  }
  to {
    transform: translate(100px, 100px);
  }
}

/* Layer 3: Subtle floating particles for depth */
.particle-layer-1 {
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(circle at 15% 20%, rgba(125, 211, 252, 0.18) 1.5px, transparent 1.5px),
    radial-gradient(circle at 85% 30%, rgba(147, 51, 234, 0.15) 1.2px, transparent 1.2px),
    radial-gradient(circle at 45% 60%, rgba(236, 72, 153, 0.14) 1.8px, transparent 1.8px),
    radial-gradient(circle at 70% 80%, rgba(34, 211, 238, 0.16) 1.5px, transparent 1.5px);
  background-size: 240px 240px, 280px 280px, 220px 220px, 260px 260px;
  animation: particles-float-1 40s ease-in-out infinite, particles-fade-1 12s ease-in-out infinite alternate;
  z-index: -3;
  pointer-events: none;
  opacity: 0.7;
}

.particle-layer-2 {
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(circle at 55% 15%, rgba(125, 211, 252, 0.16) 1.2px, transparent 1.2px),
    radial-gradient(circle at 20% 45%, rgba(236, 72, 153, 0.14) 1.5px, transparent 1.5px),
    radial-gradient(circle at 75% 65%, rgba(147, 51, 234, 0.15) 1.4px, transparent 1.4px);
  background-size: 300px 300px, 250px 250px, 280px 280px;
  animation: particles-float-2 50s ease-in-out infinite reverse, particles-fade-2 14s ease-in-out infinite alternate;
  z-index: -3;
  pointer-events: none;
  opacity: 0.6;
}

@keyframes particles-float-1 {
  0%, 100% {
    transform: translate(0, 0) scale(1);
  }
  25% {
    transform: translate(20px, -30px) scale(1.05);
  }
  50% {
    transform: translate(-15px, -50px) scale(0.98);
  }
  75% {
    transform: translate(30px, -20px) scale(1.02);
  }
}

@keyframes particles-float-2 {
  0%, 100% {
    transform: translate(0, 0) scale(1);
  }
  30% {
    transform: translate(-25px, 40px) scale(1.03);
  }
  60% {
    transform: translate(20px, 60px) scale(0.97);
  }
  90% {
    transform: translate(-10px, 30px) scale(1.01);
  }
}

@keyframes particles-fade-1 {
  0%, 100% {
    opacity: 0.6;
  }
  50% {
    opacity: 0.9;
  }
}

@keyframes particles-fade-2 {
  0%, 100% {
    opacity: 0.5;
  }
  50% {
    opacity: 0.85;
  }
}

/* Layer 4: Diagonal cross-hatch lattice with wave motion - Enhanced brightness +50% */
.lattice-diagonal {
  position: fixed;
  inset: 0;
  background-image:
    repeating-linear-gradient(
      45deg,
      transparent 0px,
      transparent 112px,
      rgba(255, 0, 255, 0.10) 112px,
      rgba(255, 0, 255, 0.10) 113px
    ),
    repeating-linear-gradient(
      -45deg,
      transparent 0px,
      transparent 112px,
      rgba(0, 255, 255, 0.10) 112px,
      rgba(0, 255, 255, 0.10) 113px
    );
  animation: lattice-wave 35s cubic-bezier(0.4, 0.0, 0.6, 1) infinite;
  z-index: -2;
  pointer-events: none;
}

@keyframes lattice-wave {
  0%, 100% {
    transform: translate(0, 0) skewY(0deg);
    opacity: 0.5;
  }
  25% {
    transform: translate(-56px, 56px) skewY(0.5deg);
    opacity: 0.7;
  }
  50% {
    transform: translate(-113px, 113px) skewY(0deg);
    opacity: 0.6;
  }
  75% {
    transform: translate(-56px, 56px) skewY(-0.5deg);
    opacity: 0.7;
  }
}

/* Layer 5: Elegant pulsing orbs for ambient depth */
.orb-layer {
  position: fixed;
  inset: 0;
  z-index: -5;
  pointer-events: none;
}

.orb-layer::before,
.orb-layer::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(150px);
  opacity: 0;
  animation: orb-pulse 30s cubic-bezier(0.4,0,0.6,1) infinite;
}

.orb-layer::before {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle,
    rgba(125,211,252,0.15),
    rgba(125,211,252,0.06),
    transparent 75%);
  top: 15%;
  left: 8%;
}

.orb-layer::after {
  width: 700px;
  height: 700px;
  background: radial-gradient(circle,
    rgba(147,51,234,0.12),
    rgba(147,51,234,0.05),
    transparent 75%);
  bottom: 10%;
  right: 10%;
  animation-delay: 15s;
}

@keyframes orb-pulse {
  0%,100% {
    opacity: 0;
    transform: scale(0.92);
  }
  50% {
    opacity: 0.5;
    transform: scale(1.05);
  }
}

/* -----------------------
   Noise Overlay (toned down)
------------------------ */
.noise-overlay {
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.6' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  z-index: -2;
  pointer-events: none;
  opacity: 0.6;
}

/* Layer 7: Subtle hexagonal lattice */
.hexagonal-lattice {
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(circle at 0% 0%, rgba(125, 211, 252, 0.04) 1.5px, transparent 1.5px),
    radial-gradient(circle at 50% 0%, rgba(147, 51, 234, 0.035) 1.5px, transparent 1.5px),
    radial-gradient(circle at 25% 43.3%, rgba(34, 211, 238, 0.04) 1.5px, transparent 1.5px),
    radial-gradient(circle at 75% 43.3%, rgba(168, 85, 247, 0.035) 1.5px, transparent 1.5px);
  background-size: 120px 103.9px;
  animation: hex-lattice-rotate 90s linear infinite, hex-breathe 16s ease-in-out infinite alternate;
  z-index: -3;
  pointer-events: none;
  opacity: 0.5;
}

@keyframes hex-lattice-rotate {
  from {
    transform: rotate(0deg) scale(1);
  }
  to {
    transform: rotate(360deg) scale(1);
  }
}

@keyframes hex-breathe {
  0%, 100% {
    opacity: 0.4;
    filter: brightness(1);
  }
  50% {
    opacity: 0.6;
    filter: brightness(1.1);
  }
}

/* Layer 8: Minimal Fibonacci lattice accents */
.fibonacci-lattice {
  position: fixed;
  inset: 0;
  z-index: -4;
  pointer-events: none;
  opacity: 0.4;
}

.fibonacci-lattice::before,
.fibonacci-lattice::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 50% 50%, rgba(125, 211, 252, 0.08) 1.2px, transparent 1.2px),
    radial-gradient(circle at 61.8% 50%, rgba(147, 51, 234, 0.07) 1.4px, transparent 1.4px),
    radial-gradient(circle at 38.2% 50%, rgba(236, 72, 153, 0.07) 1.4px, transparent 1.4px),
    radial-gradient(circle at 50% 61.8%, rgba(34, 211, 238, 0.06) 1.3px, transparent 1.3px);
  background-size: 420px 420px;
  animation: fibonacci-spin 100s linear infinite;
}

.fibonacci-lattice::after {
  animation: fibonacci-spin 130s linear infinite reverse;
  opacity: 0.5;
}

@keyframes fibonacci-spin {
  from {
    transform: rotate(0deg) scale(1.15);
  }
  to {
    transform: rotate(360deg) scale(1.15);
  }
}

/* Layer 9: Soft ambient gradient cells */
.voronoi-cells {
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(ellipse 350px 450px at 20% 25%, rgba(125, 211, 252, 0.05), transparent 55%),
    radial-gradient(ellipse 400px 350px at 80% 35%, rgba(147, 51, 234, 0.04), transparent 55%),
    radial-gradient(ellipse 320px 420px at 50% 75%, rgba(236, 72, 153, 0.04), transparent 55%);
  animation: voronoi-morph 70s ease-in-out infinite alternate;
  z-index: -5;
  pointer-events: none;
  filter: blur(50px);
  opacity: 0.5;
}

@keyframes voronoi-morph {
  0%, 100% {
    background-size: 100% 100%;
    transform: scale(1) rotate(0deg);
  }
  50% {
    background-size: 110% 110%;
    transform: scale(1.03) rotate(0.5deg);
  }
}

/* Layer 10: Delicate moiré pattern accent */
.moire-interference {
  position: fixed;
  inset: 0;
  background-image:
    repeating-linear-gradient(
      35deg,
      transparent 0px,
      transparent 59px,
      rgba(125, 211, 252, 0.025) 59px,
      rgba(125, 211, 252, 0.025) 60px
    ),
    repeating-linear-gradient(
      145deg,
      transparent 0px,
      transparent 59px,
      rgba(147, 51, 234, 0.02) 59px,
      rgba(147, 51, 234, 0.02) 60px
    );
  animation: moire-shift 90s linear infinite, moire-pulse 20s ease-in-out infinite alternate;
  z-index: -4;
  pointer-events: none;
  opacity: 0.4;
}

@keyframes moire-shift {
  from {
    transform: rotate(0deg) scale(1.4);
  }
  to {
    transform: rotate(360deg) scale(1.4);
  }
}

@keyframes moire-pulse {
  0%, 100% {
    opacity: 0.3;
  }
  50% {
    opacity: 0.5;
  }
}

/* Layer 11: Refined lattice accent points */
.reciprocal-lattice {
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(circle at 50% 50%, rgba(125, 211, 252, 0.06) 1.8px, transparent 1.8px),
    radial-gradient(circle at 33.3% 33.3%, rgba(147, 51, 234, 0.05) 1.5px, transparent 1.5px),
    radial-gradient(circle at 66.7% 33.3%, rgba(236, 72, 153, 0.05) 1.5px, transparent 1.5px),
    radial-gradient(circle at 33.3% 66.7%, rgba(34, 211, 238, 0.05) 1.5px, transparent 1.5px);
  background-size: 180px 180px;
  animation: reciprocal-oscillate 70s cubic-bezier(0.45, 0.05, 0.55, 0.95) infinite alternate;
  z-index: -4;
  pointer-events: none;
  opacity: 0.45;
}

@keyframes reciprocal-oscillate {
  0%, 100% {
    transform: translate(0, 0) scale(1);
    opacity: 0.35;
  }
  50% {
    transform: translate(-45px, 45px) scale(1.03);
    opacity: 0.55;
  }
}

@keyframes noise-shift {
  0%, 100% {
    transform: translate(0, 0);
  }
  10% {
    transform: translate(-2%, 2%)
  }
  25% {
    transform: translate(2%, -2%);
  }
  50% {
    transform: translate(-2%, 2%);
  }
  75% {
    transform: translate(2%, 2%);
  }
}

/* -----------------------
   Layout
------------------------ */
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.65;
}

.container {
  max-width: 980px;
  margin: 0 auto;
  padding: 24px;
}

/* -----------------------
   Header
------------------------ */
.site-header {
  backdrop-filter: blur(12px);
  background: linear-gradient(
    to bottom,
    rgba(11,13,16,0.75),
    rgba(11,13,16,0.35)
  );
  border-bottom: 1px solid var(--border);
}

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

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-decoration: none;
  color: var(--fg);
}

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

.brand-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid var(--border);
}

.nav a {
  margin-left: 16px;
  color: var(--muted);
  text-decoration: none;
}

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

/* -----------------------
   Articles
------------------------ */
.article {
  background: linear-gradient(
    180deg,
    var(--card),
    var(--card-strong)
  );
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 36px;
  box-shadow:
    0 30px 80px rgba(0,0,0,0.45),
    inset 0 1px 0 rgba(255,255,255,0.03);
}

.article-body {
  max-width: 72ch;
}

.article-body h1,
.article-body h2,
.article-body h3 {
  margin-top: 2rem;
}

.article-body pre {
  background: #0f141b;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  overflow-x: auto;
  font-size: 0.95rem;
  line-height: 1.55;
}

.article-body code {
  background: #0f141b;
  padding: 2px 6px;
  border-radius: 6px;
}

/* -----------------------
   Lists
------------------------ */
.list {
  list-style: none;
  padding: 0;
}

.list li {
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}

/* -----------------------
   Tags
------------------------ */
.tag {
  display: inline-block;
  background: #0f172a;
  border: 1px solid #334155;
  border-radius: 999px;
  padding: 2px 10px;
  font-size: 0.75rem;
  margin-right: 6px;
}

/* Tags Grid */
.tags-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
  margin-top: 32px;
}

.tag-card {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: linear-gradient(135deg, rgba(15, 20, 27, 0.8), rgba(15, 20, 27, 0.6));
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  text-decoration: none;
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  overflow: hidden;
}

.tag-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), rgba(125, 211, 252, 0.3));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.tag-card:hover {
  transform: translateY(-4px);
  border-color: rgba(125, 211, 252, 0.5);
  background: linear-gradient(135deg, rgba(15, 20, 27, 0.95), rgba(15, 20, 27, 0.85));
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4), 0 0 40px rgba(125, 211, 252, 0.1);
}

.tag-card:hover::before {
  transform: scaleX(1);
}

.tag-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--fg);
  margin-bottom: 8px;
  font-family: 'Courier New', monospace;
  letter-spacing: 0.5px;
}

.tag-count {
  font-size: 0.875rem;
  color: var(--muted);
  font-weight: 500;
}

.tag-card:hover .tag-name {
  color: var(--accent);
}

.tag-card:hover .tag-count {
  color: var(--fg);
}

@media (max-width: 768px) {
  .tags-grid {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 12px;
  }

  .tag-card {
    padding: 12px;
  }

  .tag-name {
    font-size: 0.9rem;
  }

  .tag-count {
    font-size: 0.8rem;
  }
}

@media (max-width: 480px) {
  .tags-grid {
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 10px;
  }
}

/* -----------------------
   Footer
------------------------ */
.site-footer {
  border-top: 1px solid var(--border);
  margin-top: 64px;
  padding-top: 24px;
}

/* -----------------------
   Links
------------------------ */
a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.muted {
  color: var(--muted);
}

/* -----------------------
   Error Pages
------------------------ */
.error-page {
  text-align: center;
  padding: 80px 24px;
}

.error-page h1 {
  font-size: 6rem;
  margin: 0;
  color: var(--accent);
}

.error-page h2 {
  font-size: 2rem;
  margin: 16px 0;
}

.error-page p {
  color: var(--muted);
  margin: 16px 0;
}

/* -----------------------
   Projects / Hero Cards
------------------------ */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 32px;
  margin-top: 32px;
}

.project-card {
  position: relative;
  display: block;
  background: linear-gradient(
    135deg,
    rgba(15, 20, 27, 0.95),
    rgba(25, 30, 40, 0.9)
  );
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(125, 211, 252, 0.15);
  border-radius: 20px;
  padding: 32px;
  text-decoration: none;
  color: var(--fg);
  overflow: hidden;
  transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  box-shadow:
    0 10px 40px rgba(0, 0, 0, 0.3),
    inset 0 1px 0 rgba(255, 255, 255, 0.05);
  animation: card-entrance 0.6s ease-out backwards;
}

@keyframes card-entrance {
  from {
    opacity: 0;
    transform: translateY(30px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.project-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    circle at 50% 50%,
    rgba(125, 211, 252, 0.12),
    transparent 70%
  );
  opacity: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
}

.project-card::after {
  content: "";
  position: absolute;
  inset: -2px;
  background: linear-gradient(
    135deg,
    rgba(125, 211, 252, 0.4),
    rgba(147, 51, 234, 0.4),
    rgba(236, 72, 153, 0.4)
  );
  border-radius: 20px;
  opacity: 0;
  z-index: -1;
  filter: blur(20px);
  transition: opacity 0.4s ease;
}

.project-card:hover {
  transform: translateY(-8px) scale(1.02);
  border-color: rgba(125, 211, 252, 0.4);
  box-shadow:
    0 25px 70px rgba(0, 0, 0, 0.5),
    0 0 80px rgba(125, 211, 252, 0.1),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.project-card:hover::before {
  opacity: 1;
}

.project-card:hover::after {
  opacity: 0.6;
}

.project-card:nth-child(1) { animation-delay: 0.05s; }
.project-card:nth-child(2) { animation-delay: 0.1s; }
.project-card:nth-child(3) { animation-delay: 0.15s; }
.project-card:nth-child(4) { animation-delay: 0.2s; }
.project-card:nth-child(5) { animation-delay: 0.25s; }
.project-card:nth-child(6) { animation-delay: 0.3s; }
.project-card:nth-child(7) { animation-delay: 0.35s; }
.project-card:nth-child(8) { animation-delay: 0.4s; }

.project-card h3 {
  margin: 0 0 12px 0;
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, #7dd3fc, #c084fc);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: all 0.3s ease;
}

.project-card:hover h3 {
  background: linear-gradient(135deg, #93ddff, #d8a6ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transform: translateX(4px);
}

.project-card p {
  margin: 0 0 16px 0;
  line-height: 1.7;
  color: var(--muted);
  transition: color 0.3s ease;
}

.project-card:hover p {
  color: var(--fg);
}

.project-card .tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: linear-gradient(135deg, rgba(125, 211, 252, 0.15), rgba(147, 51, 234, 0.15));
  border: 1px solid rgba(125, 211, 252, 0.3);
  color: var(--accent);
  padding: 8px 16px;
  border-radius: 12px;
  font-size: 0.875rem;
  font-weight: 600;
  transition: all 0.3s ease;
}

.project-card:hover .tag {
  background: linear-gradient(135deg, rgba(125, 211, 252, 0.25), rgba(147, 51, 234, 0.25));
  border-color: rgba(125, 211, 252, 0.5);
  transform: translateX(4px);
}

.hero {
  margin-bottom: 48px;
  padding: 48px 0;
  animation: hero-entrance 0.8s ease-out;
}

@keyframes hero-entrance {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.whoami {
  background: linear-gradient(135deg, rgba(15, 20, 27, 0.95), rgba(25, 30, 40, 0.9));
  backdrop-filter: blur(12px);
  border: 1px solid rgba(125, 211, 252, 0.2);
  padding: 24px;
  border-radius: 16px;
  font-size: 0.95rem;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.quick-links a {
  margin-right: 16px;
  color: var(--accent);
}

.login-container {
  max-width: 800px;
  margin: 2rem auto;
  padding: 2rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(125, 211, 252, 0.3);
  border-radius: 8px;
}

.login-header {
  margin-bottom: 2rem;
  text-align: center;
}

.login-header h1 {
  margin: 0 0 0.5rem 0;
  color: #7dd3fc;
}

.login-header p {
  margin: 0;
  color: #a0a6b3;
}

.challenge-section {
  margin: 2rem 0;
}

.challenge-label {
  display: block;
  margin-bottom: 0.5rem;
  color: #7dd3fc;
  font-weight: bold;
  font-size: 1.1rem;
}

.challenge-box-wrapper {
  position: relative;
}

.challenge-box {
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(125, 211, 252, 0.5);
  padding: 1rem;
  padding-right: 4rem;
  font-family: 'Courier New', monospace;
  font-size: 13px;
  color: #7dd3fc;
  word-break: break-all;
  border-radius: 4px;
  line-height: 1.6;
}

.copy-btn {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  padding: 0.4rem 0.8rem;
  background: rgba(125, 211, 252, 0.2);
  border: 1px solid #7dd3fc;
  color: #7dd3fc;
  cursor: pointer;
  border-radius: 4px;
  font-size: 11px;
  transition: all 0.2s;
  white-space: nowrap;
}

.copy-btn:hover {
  background: rgba(125, 211, 252, 0.3);
}

.instructions {
  margin: 2rem 0;
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(125, 211, 252, 0.2);
  border-radius: 4px;
  padding: 1.5rem;
}

.instructions h2 {
  margin-top: 0;
  color: #7dd3fc;
  font-size: 1.2rem;
}

.instructions ol {
  padding-left: 1.5rem;
  line-height: 1.8;
}

.instructions li {
  margin-bottom: 0.5rem;
}

.instructions code {
  background: rgba(125, 211, 252, 0.1);
  padding: 0.2rem 0.5rem;
  border-radius: 3px;
  font-family: 'Courier New', monospace;
  color: #7dd3fc;
  font-size: 12px;
  word-break: break-all;
}

.instructions-note {
  background: rgba(125, 211, 252, 0.1);
  border-left: 3px solid #7dd3fc;
  padding: 1rem;
  margin: 1rem 0;
  font-size: 0.9rem;
}

.instructions-note strong {
  color: #7dd3fc;
}

.form-section {
  margin: 2rem 0;
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  color: #7dd3fc;
  font-weight: bold;
}

textarea {
  width: 100%;
  min-height: 200px;
  padding: 1rem;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(125, 211, 252, 0.5);
  color: #fff;
  font-family: 'Courier New', monospace;
  font-size: 13px;
  border-radius: 4px;
  line-height: 1.5;
  resize: vertical;
}

textarea:focus {
  outline: none;
  border-color: #7dd3fc;
  box-shadow: 0 0 0 2px rgba(125, 211, 252, 0.2);
}

.submit-btn {
  width: 100%;
  padding: 1rem 2rem;
  background: #7dd3fc;
  color: #0b0d10;
  border: none;
  border-radius: 4px;
  font-size: 16px;
  font-weight: bold;
  cursor: pointer;
  margin-top: 1rem;
  transition: all 0.2s;
}

.submit-btn:hover {
  background: #93ddff;
  transform: translateY(-1px);
}

.flash {
  padding: 1rem;
  margin-bottom: 1rem;
  border-radius: 4px;
}

.flash-error {
  background: rgba(239, 68, 68, 0.2);
  border: 1px solid rgba(239, 68, 68, 0.5);
  color: #fca5a5;
}

/* -----------------------
   Mobile Responsiveness
------------------------ */
@media (max-width: 768px) {
  .project-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .project-card {
    padding: 24px;
  }

  .project-card h3 {
    font-size: 1.35rem;
  }

  .hero {
    padding: 32px 0;
  }

  .login-container {
    margin: 1rem;
    padding: 1.5rem;
  }

  .challenge-box {
    font-size: 11px;
    padding: 0.75rem;
    padding-bottom: 3rem;
    padding-right: 0.75rem;
  }

  .copy-btn {
    position: static;
    display: block;
    width: 100%;
    margin-top: 0.5rem;
    text-align: center;
  }

  .challenge-box-wrapper {
    display: flex;
    flex-direction: column;
  }

  .instructions {
    padding: 1rem;
  }

  .instructions code {
    font-size: 11px;
  }

  textarea {
    font-size: 12px;
    min-height: 180px;
  }
}

@media (max-width: 480px) {
  .project-grid {
    gap: 20px;
  }

  .project-card {
    padding: 20px;
    border-radius: 16px;
  }

  .project-card h3 {
    font-size: 1.25rem;
  }

  .project-card p {
    font-size: 0.9rem;
  }

  .hero {
    padding: 24px 0;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .login-container {
    margin: 0.5rem;
    padding: 1rem;
  }

  .login-header h1 {
    font-size: 1.5rem;
  }

  .challenge-box {
    font-size: 10px;
  }
}