/* 🌈 THEME VARIABLES */
:root {
  --bg-color: linear-gradient(135deg, #0a0a0a 0%, #1a1a1a 100%);
  --text-color: #fff;
  --card-bg: #1f1f1f;
  --card-border: rgba(255, 255, 255, 0.1);
  --accent-color: #00ffff;
  --accent-hover: #0080ff;
  --text-secondary: #aaa;
  --shadow: rgba(0, 0, 0, 0.6);
  --glow: rgba(0, 255, 255, 0.3);
}

[data-theme="light"] {
  --bg-color: linear-gradient(135deg, #fdfdfd 0%, #f1f1f1 100%);
  --text-color: #111;
  --card-bg: #ffffff;
  --card-border: rgba(0, 0, 0, 0.08);
  --accent-color: #0078ff;
  --accent-hover: #0056d6;
  --text-secondary: #555;
  --shadow: rgba(0, 0, 0, 0.1);
  --glow: rgba(0, 120, 255, 0.25);
}

/* 🧍 BASE STYLES */
body {
  font-family: 'Inter', sans-serif;
  background: var(--bg-color);
  color: var(--text-color);
  margin: 0;
  padding: 20px;
  min-height: 100vh;
  transition: background 0.5s ease, color 0.5s ease;
}

/* HEADER */
header {
  text-align: center;
  margin-bottom: 50px;
  position: relative;
}

h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 8px;
  text-shadow: 0 0 12px var(--glow);
  letter-spacing: 1px;
}

header p {
  font-size: 1.1rem;
  font-weight: 300;
  margin: 0;
  color: var(--text-secondary);
}

/* 🌗 THEME TOGGLE BUTTON */
.theme-toggle {
  position: absolute;
  top: 0;
  right: 0;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 50%;
  width: 48px;
  height: 48px;
  font-size: 1.4rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.4s ease;
}

.theme-toggle:hover {
  transform: rotate(20deg) scale(1.05);
  box-shadow: 0 0 15px var(--glow);
}

/* 🧩 PROJECT GRID */
.projects-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 25px;
  max-width: 1300px;
  margin: 0 auto;
}

/* 🎴 PROJECT CARD */
.project-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 6px 18px var(--shadow);
  width: 320px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  opacity: 0;
  transform: translateY(40px) scale(0.98);
  animation: fadeInUp 0.8s ease forwards;
  animation-play-state: paused;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.project-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.3);
  border-color: var(--accent-color);
}

/* 🖼️ PROJECT IMAGE */
.project-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-top-left-radius: 16px;
  border-top-right-radius: 16px;
  transition: transform 0.4s ease;
}

.project-card:hover img {
  transform: scale(1.05);
}

/* 📄 CARD CONTENT */
.card-content {
  padding: 20px 15px 25px;
  text-align: center;
}

.card-content h3 {
  font-size: 1.25em;
  font-weight: 600;
  margin-bottom: 10px;
}

.card-content p {
  font-size: 0.95em;
  font-weight: 300;
  color: var(--text-secondary);
  margin-bottom: 18px;
}

/* 🔘 VIEW PROJECT BUTTON */
.view-btn {
  display: inline-block;
  padding: 10px 22px;
  background: linear-gradient(45deg, var(--accent-color), var(--accent-hover));
  color: #fff;
  text-decoration: none;
  border-radius: 25px;
  font-weight: 600;
  transition: all 0.3s ease;
  box-shadow: 0 0 8px var(--glow);
}

.view-btn:hover {
  background: linear-gradient(45deg, var(--accent-hover), var(--accent-color));
  transform: scale(1.08);
  box-shadow: 0 0 20px var(--glow);
}

/* ✨ ANIMATIONS */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(40px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* 📱 RESPONSIVE */
@media (max-width: 1024px) {
  .project-card {
    width: 280px;
  }
}

@media (max-width: 768px) {
  body {
    padding: 10px;
  }
  h1 {
    font-size: 2rem;
  }
  .projects-grid {
    gap: 18px;
  }
  .project-card {
    width: 100%;
    max-width: 340px;
  }
  .theme-toggle {
    position: static;
    margin: 15px auto 0;
  }
}