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

/* Design tokens (matches root portfolio design system) */
:root {
  --bg: #0A0F1E;
  --bg2: #111827;
  --bg3: #1a2035;
  --text: #F0EDE6;
  --muted: #94A3B8;
  --accent: #6366F1;
  --accent2: #14B8A6;
  --border: rgba(99, 102, 241, 0.18);
  --card: rgba(26, 32, 53, 0.8);
}

html {
  scroll-behavior: smooth;
}

/* Body */
body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', Arial, Helvetica, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
}

/* Header */
header {
  text-align: center;
  padding: 70px 20px 60px;
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

header::before {
  content: '';
  position: absolute;
  width: 650px;
  height: 650px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.16) 0%, transparent 70%);
  top: -280px;
  left: 50%;
  transform: translateX(-50%);
  pointer-events: none;
}

header::after {
  content: '';
  position: absolute;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(20, 184, 166, 0.1) 0%, transparent 70%);
  bottom: -220px;
  right: 8%;
  pointer-events: none;
}

header h1,
header p,
header .back-btn {
  position: relative;
  z-index: 1;
}

header h1 {
  font-family: 'Space Grotesk', 'Inter', sans-serif;
  font-size: clamp(2.1rem, 5vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 15px;
}

header p {
  font-family: 'JetBrains Mono', 'Inter', monospace;
  font-size: 15px;
  color: var(--muted);
  margin-bottom: 10px;
  letter-spacing: 0.01em;
}

/* Back Button */
.back-btn {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  width: 220px;
  height: 46px;
  margin-top: 24px;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid rgba(99, 102, 241, 0.5);
  transition: background 0.22s, transform 0.22s, box-shadow 0.22s;
}

.back-btn:hover {
  background: #4f51e0;
  transform: translateY(-2px);
  box-shadow: 0 10px 26px rgba(99, 102, 241, 0.32);
}

/* Container */
.container {
  width: 90%;
  max-width: 1250px;
  margin: auto;
  padding: 55px 0;
}

/* Section Heading */
.container h2 {
  font-family: 'Space Grotesk', 'Inter', sans-serif;
  color: var(--text);
  font-size: 1.9rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 28px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
  position: relative;
}

.container h2::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 56px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
}

/* Grid */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 22px;
}

/* Card */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 22px;
  height: 235px;
  display: flex;
  flex-direction: column;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.card:hover {
  transform: translateY(-6px);
  border-color: var(--accent);
  box-shadow: 0 16px 34px rgba(0, 0, 0, 0.35), 0 0 0 1px rgba(99, 102, 241, 0.15);
}

/* Card Heading */
.card h3 {
  font-family: 'Space Grotesk', 'Inter', sans-serif;
  font-size: 1.15rem;
  font-weight: 700;
  height: 48px;
  display: flex;
  align-items: center;
  margin-bottom: 12px;
  color: var(--text);
}

/* Card Description */
.card p {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.65;
  flex: 1;
  margin-bottom: 18px;
}

/* Card Button */
.card a {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100px;
  height: 38px;
  margin-top: auto;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  border-radius: 6px;
  font-family: 'Space Grotesk', 'Inter', sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  border: 1px solid rgba(99, 102, 241, 0.5);
  transition: background 0.22s, transform 0.22s, box-shadow 0.22s;
}

.card a:hover {
  background: #4f51e0;
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(99, 102, 241, 0.3);
}

/* Footer */
footer {
  margin-top: 50px;
  padding: 35px 20px;
  text-align: center;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-family: 'JetBrains Mono', 'Inter', monospace;
  font-size: 0.82rem;
}

/* Tablet */
@media (max-width:992px) {

  header h1 {
    font-size: 2rem;
  }

  header p {
    font-size: 0.92rem;
  }

  .container {
    width: 92%;
  }

  .grid {
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  }

  .card {
    height: 230px;
  }
}

/* Mobile */
@media (max-width:768px) {

  header {
    padding: 50px 20px 45px;
  }

  header h1 {
    font-size: 1.7rem;
  }

  header p {
    font-size: 0.85rem;
  }

  .back-btn {
    width: 100%;
    max-width: 240px;
  }

  .container {
    width: 94%;
    padding: 40px 0;
  }

  .container h2 {
    font-size: 1.5rem;
  }

  .grid {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .card {
    height: auto;
    min-height: 220px;
  }

  .card h3 {
    height: auto;
    min-height: 42px;
    font-size: 1.05rem;
  }

  .card a {
    width: 100%;
  }
}