/* ============================================
   🌌 COSMIC MACHINE LEARNING LAB THEME
   ============================================ */

/* 1. BASE PAGE SETUP */
body {
  margin: 0;
  min-height: 100vh;
  /* Deep Space Background Gradient */
  background: radial-gradient(circle at top, #020617 0, #050a14 40%, #000000 100%);
  color: #e5f5e9;
  position: relative;
  overflow-x: hidden;
  /* Hide satellites/comets that fly off-screen */
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

/* 2. BACKGROUND LAYERS (Fixed behind content) */
/* IMPORTANT: This container holds all space items so they don't block clicks */
.background-layers {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -10;
  /* Push way behind */
  pointer-events: none;
  /* Let mouse clicks pass through to buttons */
  overflow: hidden;
}

.ml-home-btn {
  display: inline-block;
  margin-top: 1.5rem;
  padding: 0.75rem 1.6rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.35);
  background: linear-gradient(135deg, #22d3ee, #6366f1);
  color: #0b1020;
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.03em;
  text-decoration: none;
  text-transform: uppercase;
  box-shadow: 0 8px 25px rgba(15, 23, 42, 0.7);
  transition: transform 0.18s ease, box-shadow 0.18s ease, filter 0.18s ease;
}

.ml-home-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 35px rgba(15, 23, 42, 0.9);
  filter: brightness(1.05);
}

.ml-home-btn:active {
  transform: translateY(0);
  box-shadow: 0 6px 18px rgba(15, 23, 42, 0.7);
}


/* --- SPACE OBJECTS STYLES --- */

/* Stars Layer 1 (Bright, close) */
/* ============================================
   ✨ HIGH DENSITY STARFIELD (The "Galaxy" Look)
   ============================================ */

/* Layer 1: The Brightest, Closest Stars */
.layer-stars {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  /* 👇 MASSIVE LIST OF STARS */
  background-image:
    radial-gradient(2px 2px at 20px 30px, #ffffff, transparent),
    radial-gradient(2px 2px at 40px 70px, #ffffff, transparent),
    radial-gradient(1px 1px at 50px 160px, #ffffff, transparent),
    radial-gradient(2.5px 2.5px at 80px 120px, #ffffff, transparent),
    radial-gradient(2px 2px at 110px 40px, #ffffff, transparent),
    radial-gradient(1px 1px at 140px 80px, #ffffff, transparent),
    radial-gradient(3px 3px at 160px 180px, #ffffff, transparent),
    /* Big Star */
    radial-gradient(1px 1px at 190px 40px, #ffffff, transparent),
    radial-gradient(2px 2px at 10px 250px, #ffffff, transparent),
    radial-gradient(1.5px 1.5px at 120px 200px, #ffffff, transparent),
    radial-gradient(2px 2px at 220px 10px, #ffffff, transparent),
    radial-gradient(1px 1px at 250px 280px, #ffffff, transparent);

  /* 👇 Smaller size = Pattern repeats more often = MORE STARS */
  background-size: 300px 300px;
  opacity: 1;
  /* Maximum Brightness */
  animation: twinkle 3s infinite ease-in-out alternate;
}

/* Layer 2: Medium Distance (High Density) */
.layer-stars-2 {
  background-image:
    radial-gradient(1.5px 1.5px at 15px 15px, #fff, transparent),
    radial-gradient(1.5px 1.5px at 150px 50px, #fff, transparent),
    radial-gradient(1px 1px at 80px 180px, #fff, transparent),
    radial-gradient(1px 1px at 220px 240px, #fff, transparent),
    radial-gradient(1.5px 1.5px at 40px 280px, #fff, transparent),
    radial-gradient(1px 1px at 300px 100px, #fff, transparent);

  background-size: 350px 350px;
  opacity: 0.8;
  /* Very bright */
  animation-duration: 5s;
  transform: rotate(25deg);
}

/* Layer 3: Background Dust (Tiny & Many) */
.layer-stars-3 {
  background-image:
    radial-gradient(1px 1px at 100px 100px, #fff, transparent),
    radial-gradient(1px 1px at 200px 200px, #fff, transparent),
    radial-gradient(1px 1px at 50px 300px, #fff, transparent);

  background-size: 150px 150px;
  /* Repeats very often */
  opacity: 0.5;
  animation-duration: 7s;
}

/* ⚡ Intense Twinkle Animation */
@keyframes twinkle {
  0% {
    opacity: 1;
    transform: scale(1);
  }

  100% {
    opacity: 0.4;
    transform: scale(0.8);
  }
}


/* The Moon (Glowing Orb) */
.layer-moon {
  position: absolute;
  top: 10%;
  right: 15%;
  width: 80px;
  height: 80px;
  background: radial-gradient(circle at 30% 30%, #fefefe, #d1d5db);
  border-radius: 50%;
  box-shadow: 0 0 40px rgba(255, 255, 255, 0.2);
  opacity: 0.9;
}

/* The Planet (Big Feature) */
.layer-planet {
  position: absolute;
  bottom: -10%;
  left: -5%;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle at 60% 40%, #4f46e5, #000);
  box-shadow: inset -20px -20px 60px rgba(0, 0, 0, 0.8);
  opacity: 0.6;
}

/* Planet Ring */
.layer-planet-ring {
  position: absolute;
  bottom: 5%;
  left: -5%;
  width: 400px;
  height: 100px;
  border: 4px solid rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  transform: rotate(-20deg);
  opacity: 0.4;
}

/* The Comet */
.layer-comet {
  position: absolute;
  top: 20%;
  left: -100px;
  width: 4px;
  height: 4px;
  background: #fff;
  box-shadow: 0 0 10px #fff, 0 0 20px #4ade80;
  /* Green tail */
  border-radius: 50%;
  animation: cometFly 25s linear infinite;
}

.layer-comet::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100px;
  height: 2px;
  background: linear-gradient(90deg, transparent, #4ade80);
  transform: translateX(-100%);
}

@keyframes cometFly {
  0% {
    transform: translate(0, 0) rotate(15deg);
    opacity: 0;
  }

  10% {
    opacity: 1;
  }

  100% {
    transform: translate(120vw, 40vh) rotate(15deg);
    opacity: 0;
  }
}

/* Space Clouds (Nebula) */
.layer-clouds {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 80% 20%, rgba(76, 29, 149, 0.15), transparent 40%),
    radial-gradient(circle at 20% 80%, rgba(6, 78, 59, 0.15), transparent 40%);
  filter: blur(40px);
  z-index: -5;
}

/* Shooting Stars */
.shooting-star {
  position: fixed;
  top: 0;
  left: 50%;
  width: 100px;
  height: 2px;
  background: linear-gradient(90deg, #ffffff, transparent);
  opacity: 0;
  z-index: -1;
  pointer-events: none;
  animation: meteorShoot 6s linear infinite;
}

.shooting-star:nth-child(2) {
  top: 20%;
  left: 20%;
  animation-duration: 9s;
  animation-delay: 2s;
}

@keyframes meteorShoot {
  0% {
    transform: translateX(0) translateY(0) rotate(-45deg);
    opacity: 1;
  }

  20% {
    transform: translateX(-200px) translateY(200px) rotate(-45deg);
    opacity: 0;
  }

  100% {
    transform: translateX(-200px) translateY(200px) rotate(-45deg);
    opacity: 0;
  }
}

/* Satellite Layer */
.satellite-layer {
  position: fixed;
  top: 15%;
  right: 10%;
  width: 60px;
  height: 60px;
  background: rgba(100, 255, 218, 0.1);
  border: 1px solid rgba(100, 255, 218, 0.3);
  border-radius: 50%;
  box-shadow: 0 0 15px rgba(100, 255, 218, 0.2);
  z-index: -1;
  pointer-events: none;
  animation: satOrbit 40s linear infinite;
}

.satellite-layer::after {
  content: "";
  position: absolute;
  top: 50%;
  left: -20px;
  right: -20px;
  height: 2px;
  background: rgba(100, 255, 218, 0.4);
}

@keyframes satOrbit {
  0% {
    transform: translate(0, 0) rotate(0deg);
  }

  50% {
    transform: translate(-20vw, 10vh) rotate(180deg);
  }

  100% {
    transform: translate(-40vw, 0) rotate(360deg);
  }
}

/* ============================================
   🟢 MAIN PAGE CONTENT (Foreground)
   ============================================ */

.ml-page {
  position: relative;
  z-index: 10;
  /* Ensures content is clickable above stars */
  max-width: 1120px;
  margin: 0 auto;
  padding: 3.2rem 1.5rem 4.5rem;
  box-sizing: border-box;
}

/* HERO / HEADER CARD */
.ml-hero-card {
  margin-top: 3.2rem;
  padding: 1.6rem 1.8rem;
  border-radius: 1rem;
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(34, 197, 94, 0.4);
  box-shadow: 0 22px 60px rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(12px);

  position: relative;
  overflow: hidden;

  /* Subtle orbit float */
  animation: mlHeroFloat 7s ease-in-out infinite;
}

@keyframes mlHeroFloat {
  0% {
    transform: translateY(0) translateX(0);
  }

  25% {
    transform: translateY(-8px) translateX(6px);
  }

  50% {
    transform: translateY(-12px) translateX(-6px);
  }

  75% {
    transform: translateY(-6px) translateX(4px);
  }

  100% {
    transform: translateY(0) translateX(0);
  }
}

.ml-hero-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  border: 1px solid rgba(74, 222, 128, 0.18);
  pointer-events: none;
}

.ml-hero-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.ml-eyebrow {
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #6ee7b7;
  margin-bottom: 0.35rem;
}

.ml-heading {
  font-size: 2.1rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #bbf7d0;
  margin: 0;
}

.ml-subtitle {
  margin-top: 0.6rem;
  font-size: 0.94rem;
  color: #9ca3af;
  max-width: 640px;
}

/* PULL HANDLE / THREAD */
.pull-wrapper {
  margin-top: 2.2rem;
  display: flex;
  justify-content: center;
}

.pull-handle {
  border: none;
  background: transparent;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
}

.pull-line {
  width: 6px;
  height: 150px;
  background: linear-gradient(to bottom, #22c55e, #052e16);
  transform-origin: top;
  /* Smooth transition for the up/down movement */
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.pull-knob {
  width: 36px;
  height: 40px;
  border-radius: 999px;
  border: 5px solid #22c55e;
  background: transparent;
  box-shadow: 0 0 22px rgba(34, 197, 94, 0.9);
}

/* Thread moves UP when projects are visible (active state) */
.pull-handle.active .pull-line {
  transform: translateY(-15px);
}

/* Thread stays at default position when inactive */
.pull-handle:not(.active) .pull-line {
  transform: translateY(0);
}

/* SECTION HEADERS */
.ml-section {
  margin-top: 3rem;
}

.section-header {
  margin-bottom: 1.5rem;
}

.ml-section-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin: 0 0 0.25rem;
  color: #bbf7d0;
}

.ml-section-desc {
  font-size: 0.94rem;
  color: #9ca3af;
  max-width: 640px;
}

/* PROJECT GRID & CARDS */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 1.5rem;
}

/* Card Float Animation */
@keyframes cardFloatOrbit {
  0% {
    transform: translateY(0) translateX(0);
  }

  25% {
    transform: translateY(-8px) translateX(6px);
  }

  50% {
    transform: translateY(-12px) translateX(-6px);
  }

  75% {
    transform: translateY(-6px) translateX(4px);
  }

  100% {
    transform: translateY(0) translateX(0);
  }
}

/* Base card styles */
.project-card {
  background: radial-gradient(circle at top left, #022c22 0, #020617 55%);
  border-radius: 0.9rem;
  border: 1px solid rgba(34, 197, 94, 0.25);
  padding: 1.2rem 1.25rem 1.1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.9);

  /* Initial state (collapsed) */
  transform: translateY(40px) scale(0.96);
  opacity: 0.35;
  transition:
    transform 420ms cubic-bezier(0.23, 1, 0.32, 1),
    opacity 380ms ease,
    border-color 0.3s ease;
}

/* Visible State */
.projects-visible .project-card {
  opacity: 1;
  transform: translateY(0) scale(1);
  animation: cardFloatOrbit 8s ease-in-out infinite;
}

/* Staggered Animations */
.projects-visible .project-card:nth-child(1) {
  animation-duration: 7.5s;
  animation-delay: 0.1s;
}

.projects-visible .project-card:nth-child(2) {
  animation-duration: 8.2s;
  animation-delay: 0.3s;
}

.projects-visible .project-card:nth-child(3) {
  animation-duration: 7.8s;
  animation-delay: 0.5s;
}

.projects-visible .project-card:nth-child(4) {
  animation-duration: 8.5s;
  animation-delay: 0.2s;
}

.projects-visible .project-card:nth-child(5) {
  animation-duration: 7.2s;
  animation-delay: 0.4s;
}

/* Collapsed State */
.projects-collapsed .project-card {
  transform: translateY(40px) scale(0.96);
  opacity: 0.35;
  animation: none;
}

/* Hover Effect */
.projects-visible .project-card:hover {
  transform: translateY(-4px) scale(1.01);
  border-color: #4ade80;
  animation-play-state: paused;
  /* Important: Stop float on hover */
  cursor: pointer;
}

/* CARD CONTENT */
.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.badge {
  padding: 0.16rem 0.5rem;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.5);
  color: #9ca3af;
  background: rgba(15, 23, 42, 0.9);
}

.badge--primary {
  border-color: #22c55e;
  color: #bbf7d0;
  background: rgba(34, 197, 94, 0.1);
}

.project-title {
  font-size: 1.02rem;
  font-weight: 600;
  color: #e5f5e9;
  margin: 0;
}

.project-one-liner {
  font-size: 0.9rem;
  color: #9ca3af;
  margin: 0;
}

.project-meta {
  font-size: 0.83rem;
  color: #9ca3af;
  margin: 0;
}

.project-meta span {
  color: #e5f5e9;
}

/* ACTION BUTTONS */
.project-actions {
  margin-top: 0.6rem;
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.btn-link {
  font-size: 0.8rem;
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.7);
  background: transparent;
  color: #e5f5e9;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  transition: all 0.3s ease;
}

.btn-link--primary {
  border-color: #22c55e;
  background: rgba(34, 197, 94, 0.12);
}

.btn-link:hover {
  border-color: #a855f7;
  color: #f9fafb;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(34, 197, 94, 0.2);
}

/* RESPONSIVE TWEAKS */
@media (max-width: 640px) {
  .ml-page {
    padding: 2.5rem 1.1rem 3.5rem;
  }

  .ml-heading {
    font-size: 2rem;
  }

  .ml-subtitle {
    font-size: 0.9rem;
  }
}

/* ============================================
   🟢 UNSUPERVISED LEARNING STYLING (Bigger & Shiny)
   ============================================ */

/* Unsupervised Grid (Larger cards) */
.unsupervised-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  /* Bigger cards */
  gap: 2rem;
  /* More space between cards */
}

/* Unsupervised Card Styling (Green theme, larger) */
.project-card-unsupervised {
  background: radial-gradient(circle at top left, #0d3d2d 0, #020617 55%);
  border-radius: 1.2rem;
  border: 2px solid rgba(34, 197, 94, 0.5);
  /* Thicker green border */
  padding: 1.8rem 1.5rem 1.4rem;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  box-shadow:
    0 20px 50px rgba(34, 197, 94, 0.15),
    /* Green glow */
    0 0 40px rgba(34, 197, 94, 0.1);

  transform: translateY(40px) scale(0.96);
  opacity: 0.35;
  transition:
    transform 420ms cubic-bezier(0.23, 1, 0.32, 1),
    opacity 380ms ease,
    border-color 0.3s ease,
    box-shadow 0.3s ease;
}

/* When Unsupervised Grid is Visible */
.projects-visible-unsupervised .project-card-unsupervised {
  opacity: 1;
  transform: translateY(0) scale(1);
  animation: cardFloatOrbit 8s ease-in-out infinite;
}

/* Staggered animations for unsupervised cards */
.projects-visible-unsupervised .project-card-unsupervised:nth-child(1) {
  animation-duration: 7.8s;
  animation-delay: 0.1s;
}

.projects-visible-unsupervised .project-card-unsupervised:nth-child(2) {
  animation-duration: 8.3s;
  animation-delay: 0.25s;
}

.projects-visible-unsupervised .project-card-unsupervised:nth-child(3) {
  animation-duration: 8s;
  animation-delay: 0.4s;
}

.projects-visible-unsupervised .project-card-unsupervised:nth-child(4) {
  animation-duration: 7.6s;
  animation-delay: 0.15s;
}

.projects-visible-unsupervised .project-card-unsupervised:nth-child(5) {
  animation-duration: 8.5s;
  animation-delay: 0.3s;
}

.projects-visible-unsupervised .project-card-unsupervised:nth-child(6) {
  animation-duration: 7.9s;
  animation-delay: 0.2s;
}

/* Collapsed state */
.projects-collapsed-unsupervised .project-card-unsupervised {
  transform: translateY(40px) scale(0.96);
  opacity: 0.35;
  animation: none;
}

/* Hover effect (Green glow intensifies) */
.projects-visible-unsupervised .project-card-unsupervised:hover {
  transform: translateY(-6px) scale(1.02);
  border-color: #4ade80;
  box-shadow:
    0 30px 60px rgba(34, 197, 94, 0.3),
    0 0 50px rgba(74, 222, 128, 0.25);
  animation-play-state: paused;
  cursor: pointer;
}

/* Unsupervised Badge */
.badge--unsupervised {
  border-color: #22c55e;
  color: #bbf7d0;
  background: rgba(34, 197, 94, 0.15);
}

/* Unsupervised Button Link */
.btn-link--unsupervised {
  border-color: #22c55e;
  color: #4ade80;
}

.btn-link--unsupervised:hover {
  border-color: #86efac;
  color: #bbf7d0;
  box-shadow: 0 4px 12px rgba(34, 197, 94, 0.3);
}

/* Pull handle for unsupervised (same as supervised but maybe slightly different) */
.pull-handle-unsupervised .pull-knob {
  box-shadow: 0 0 22px rgba(34, 197, 94, 0.9);
}