:root {
  --bg: #020617;
  --bg-elevated: #020617;
  --primary: #e5e7eb;
  --muted: #9ca3af;
  --accent: #22c55e;
  --accent-soft: rgba(34, 197, 94, 0.16);
  --card: #020617;
  --border-subtle: rgba(148, 163, 184, 0.35);
  --radius-xl: 26px;
  --shadow-soft: 0 18px 50px rgba(15, 23, 42, 0.9);
}

/* RESET */
* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
  margin: 0;
  font-family: 'Poppins', system-ui, -apple-system, Segoe UI, Roboto, 'Helvetica Neue', Arial;
  background:
    radial-gradient(circle at top left, #0f172a 0, transparent 55%),
    radial-gradient(circle at bottom right, #022c22 0, transparent 55%),
    var(--bg);
  color: var(--primary);
}

/* NAV */
.nav {
  position: fixed;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  width: 94%;
  max-width: 1120px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 18px;
  border-radius: 999px;
  background: radial-gradient(circle at top left, rgba(34, 197, 94, 0.15), transparent 60%)
              ,rgba(15, 23, 42, 0.86);
  box-shadow: 0 18px 55px rgba(0, 0, 0, 0.9);
  border: 1px solid rgba(148, 163, 184, 0.55);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  z-index: 40;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo {
  width: 44px;
  height: 44px;
  border-radius: 16px;
  background: radial-gradient(circle at 20% 20%, #bbf7d0, #16a34a);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #020617;
  font-weight: 800;
  font-size: 18px;
}

.brand-title {
  font-weight: 700;
  letter-spacing: 0.03em;
}

.nav-links {
  display: flex;
  gap: 18px;
  align-items: center;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 500;
  font-size: 14px;
  transition: color 0.2s ease;
}

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

.cta {
  background: var(--accent);
  color: #020617;
  padding: 8px 12px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
}

/* HERO */
.hero {
  max-width: 1120px;
  margin: 100px auto 32px;
  padding: 30px 26px;
  border-radius: var(--radius-xl);
  background: radial-gradient(circle at top left, rgba(34, 197, 94, 0.09), transparent 55%)
              ,linear-gradient(135deg, rgba(15, 23, 42, 0.98), rgba(15, 23, 42, 0.96));
  box-shadow: var(--shadow-soft);
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 26px;
  border: 1px solid rgba(148, 163, 184, 0.35);
}

.hero-left h1 {
  font-size: 26px;
  margin: 0 0 12px;
  line-height: 1.35;
}

.hero-left p {
  margin: 0 0 18px;
  color: var(--muted);
}

.hero-cta {
  margin-top: 18px;
  display: flex;
  gap: 12px;
  align-items: center;
}

.link-primary {
  color: #a5f3fc;
  font-weight: 600;
  text-decoration: none;
}

/* PROFILE CARD */
.profile-card {
  background: radial-gradient(circle at top left, rgba(34, 197, 94, 0.16), transparent 55%)
              ,#020617;
  border-radius: 22px;
  padding: 20px;
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.85);
  border: 1px solid rgba(55, 65, 81, 0.9);
}

.profile-top {
  display: flex;
  gap: 14px;
  align-items: center;
}

.avatar {
  width: 72px;
  height: 72px;
  border-radius: 20px;
  background: conic-gradient(from 140deg, #bbf7d0, #4ade80, #22c55e, #bbf7d0);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #020617;
  font-size: 26px;
  font-weight: 800;
}

.profile-name {
  font-weight: 700;
}

.profile-stats {
  display: flex;
  gap: 16px;
  margin-top: 16px;
}

.profile-stats .stat {
  font-weight: 700;
}

.profile-links {
  margin-top: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.links-row {
  display: flex;
  gap: 10px;
}

.links-row a {
  text-decoration: none;
  color: #22c55e;
  font-weight: 600;
  font-size: 13px;
}

/* SECTIONS */
.section {
  max-width: 1120px;
  margin: 26px auto;
  padding: 22px 24px 26px;
  border-radius: var(--radius-xl);
  background: radial-gradient(circle at top left, rgba(34, 197, 94, 0.08), transparent 55%)
              ,rgba(15, 23, 42, 0.93);
  box-shadow: var(--shadow-soft);
  border: 1px solid var(--border-subtle);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 14px;
}

.section-header h2 {
  margin: 0;
  font-size: 20px;
}

.section-header p {
  margin: 0;
}

/* PROJECTS */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.project-link {
  text-decoration: none;
  color: inherit;
}

.project {
  background: radial-gradient(circle at top left, rgba(34, 197, 94, 0.18), transparent 65%)
              ,#020617;
  padding: 16px 16px 18px;
  border-radius: 18px;
  border: 1px solid rgba(55, 65, 81, 0.9);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.85);
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

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

.pill {
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: #bbf7d0;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.05em;
}

.member-tag {
  font-size: 12px;
  color: var(--muted);
}

.project h3 {
  margin: 2px 0 4px;
  font-size: 16px;
}

.project p {
  margin: 0;
}

.project:hover {
  transform: translateY(-6px) scale(1.02);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.95);
  border-color: rgba(34, 197, 94, 0.85);
}

.view-link {
  margin-top: 6px;
  color: #6ee7b7;
  font-size: 13px;
  font-weight: 600;
}

/* TEAM */
.team {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.member-card {
  text-decoration: none;
  color: inherit;
}

.member {
  background: #020617;
  padding: 14px;
  border-radius: 16px;
  border: 1px solid rgba(55, 65, 81, 0.9);
  text-align: center;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.85);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.member:hover {
  transform: translateY(-6px) scale(1.03);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.95);
  border-color: rgba(56, 189, 248, 0.9);
}

.m-ava {
  width: 60px;
  height: 60px;
  border-radius: 18px;
  margin: 0 auto 10px;
  background: conic-gradient(from 100deg, #22c55e, #06b6d4, #a855f7, #22c55e);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #020617;
  font-weight: 800;
}

/* COURSE */
.course-layout {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 18px;
}

.card {
  background: #020617;
  border-radius: 18px;
  padding: 16px 18px;
  border: 1px solid rgba(55, 65, 81, 0.9);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.85);
}

.course-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 18px;
  margin-top: 10px;
}

.course-grid .info-bold {
  font-weight: 700;
}

/* CONTACT */
.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 18px;
}

.contact input,
.contact textarea {
  width: 100%;
  padding: 10px;
  border-radius: 10px;
  border: 1px solid rgba(75, 85, 99, 0.9);
  margin-bottom: 10px;
  background: #020617;
  color: var(--primary);
}

.contact input::placeholder,
.contact textarea::placeholder {
  color: #6b7280;
}

.contact button {
  padding: 10px 14px;
  border-radius: 999px;
  border: 0;
  background: var(--accent);
  color: #020617;
  font-weight: 700;
  cursor: pointer;
}

/* FOOTER */
.footer {
  max-width: 1120px;
  margin: 24px auto 32px;
  text-align: center;
  padding: 0 20px;
  color: var(--muted);
  font-size: 13px;
}

/* UTILITIES */
.muted {
  color: var(--muted);
}

.small {
  font-size: 13px;
}

.info-bold {
  font-weight: 700;
}

/* RESPONSIVE */
@media (max-width: 980px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .hero {
    margin-top: 110px;
  }

  .projects-grid,
  .team,
  .course-layout,
  .contact-grid {
    grid-template-columns: 1fr 1fr;
  }

  .nav {
    width: 96%;
  }
}

@media (max-width: 720px) {
  .nav-links {
    display: none;
  }

  .projects-grid,
  .team,
  .course-layout,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .hero-left h1 {
    font-size: 22px;
  }
}