:root {
  --bg: #163d2e;
  --bg-dark: #0f2b22;
  --accent: #2e6b4f;
  --accent-light: #4fa275;
  --text: #f5f7f2;
  --muted: #dcebdc;
  --panel: rgba(255, 255, 255, 0.08);
  --panel-border: rgba(255, 255, 255, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, var(--bg), var(--bg-dark));
  color: var(--text);
  min-height: 100vh;
}

.page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 40px 20px 60px;
}

.hero {
  text-align: center;
  margin-bottom: 28px;
}

.hero h1 {
  font-size: 2.4rem;
  margin-bottom: 10px;
}

.hero p {
  font-size: 1.05rem;
  color: var(--muted);
  max-width: 700px;
  margin: 0 auto;
}

.button-row {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}

.nav-btn {
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 999px;
  padding: 12px 20px;
  font-size: 1rem;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s ease, transform 0.2s ease;
}

.nav-btn:hover {
  background: var(--accent-light);
  transform: translateY(-2px);
}

.card {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  padding: 32px;
  border-radius: 16px;
  max-width: 700px;
  width: 100%;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.25);
  text-align: center;
}

.card h1 {
  font-size: 2rem;
  margin-bottom: 12px;
}

.card p {
  font-size: 1.05rem;
  line-height: 1.7;
  margin: 10px 0;
}

.about-section {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 18px;
  padding: 36px;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.2);
  max-width: 900px;
  margin: 0 auto;
}

.about-section h2 {
  margin-top: 0;
  margin-bottom: 14px;
  font-size: 1.6rem;
}

.about-section p,
.about-section li {
  line-height: 1.7;
  color: #e9f2ea;
  font-size: 1.02rem;
}

.about-section ul {
  padding-left: 20px;
  margin: 16px 0 0;
}

.portfolio-box {
  background: #f3f7f2;
  border-radius: 20px;
  overflow: hidden;
  margin: 24px auto;
  max-width: 520px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.portfolio-box img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: contain;
}

.portfolio-link {
  display: block;
  padding: 14px 16px;
  text-align: center;
  color: #163d2e;
  font-weight: bold;
  text-decoration: none;
}

.portfolio-link:hover {
  background: #e7efe9;
}

.page-link {
  color: #9fe0b5;
}

.back-btn {
  display: inline-block;
  margin-top: 8px;
  padding: 10px 18px;
  font-size: 1rem;
}

@media (max-width: 800px) {
  .about-section {
    padding: 24px;
  }

  .card {
    padding: 24px;
  }
}