/* ---------- Reset / Base ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --primary: #007bff;
  --primary-dark: #0056b3;
  --text: #222;
  --muted: #555;
  --bg: #f5f5f5;
  --white: #fff;
  --shadow: 0 2px 10px rgba(0,0,0,0.1);
  --radius: 12px;
  --safe-top: env(safe-area-inset-top);
}
html, body {
  font-family: "Poppins", sans-serif;
  background: var(--bg);
  color: #333;
  scroll-behavior: smooth;
  line-height: 1.6;
  -webkit-tap-highlight-color: transparent;
}

/* ---------- Header / Nav ---------- */
header {
  position: fixed;
  inset: 0 0 auto 0;
  background: var(--white);
  box-shadow: var(--shadow);
  z-index: 1000;
  padding-top: var(--safe-top);
}
nav {
  max-width: 1100px;
  margin: 0 auto;
  padding: 12px 16px;
  padding-top: calc(12px + var(--safe-top));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

nav .logo {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--primary);
  background: transparent;
  border: 0;
  padding: 6px 0;
}

nav .logo span { color: var(--primary); }

nav .menu-toggle {
  display: none;
  font-size: 1.7rem;
  cursor: pointer;
  background: transparent;
  border: 0;
  padding: 4px 8px;
  line-height: 1;
}

nav .nav-links {
  list-style: none;
  display: flex;
  gap: 20px;
  align-items: center;
}

nav .nav-links a {
  color: var(--text);
  text-decoration: none;
  font-weight: 500;
  padding: 10px 6px;
}

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

.btn {
  display: inline-block;
  background: var(--primary);
  color: var(--white);
  padding: 10px 14px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
}

/* ---------- Mobile menu ---------- */
@media (max-width: 768px) {
  nav .menu-toggle { display: inline-block; }
  nav .nav-links {
    position: absolute;
    top: calc(56px + var(--safe-top));
    left: 0;
    width: 100%;
    background: var(--white);
    flex-direction: column;
    align-items: stretch;
    text-align: center;
    gap: 0;
    display: none;
    box-shadow: 0 4px 14px rgba(0,0,0,0.08);
    border-top: 1px solid #eee;
  }
  nav .nav-links li a {
    padding: 14px 18px;
    border-bottom: 1px solid #f1f1f1;
  }
  nav .nav-links.active { display: flex; }
}

/* ---------- Main spacing under fixed header ---------- */
main {
  padding-top: 90px;
}

/* ---------- Home ---------- */
.home {
  min-height: 80vh;
  display: grid;
  place-items: center;
  background: linear-gradient(90deg, var(--primary), #00c6ff);
  color: var(--white);
  text-align: center;
  padding: 28px 16px;
}
.home .home-inner { max-width: 760px; }
.home h1 { font-size: clamp(1.6rem, 4.5vw, 2.4rem); margin-bottom: 10px; }
.home p { font-size: clamp(0.98rem, 2.8vw, 1.1rem); margin-bottom: 18px; color: #f7f7f7; }

/* ---------- Projects ---------- */
.projects-section {
  padding: 52px 5%;
  background: #f9f9f9;
  text-align: center;
}
.projects-section h2 {
  font-size: clamp(1.6rem, 4vw, 2rem);
  color: var(--text);
  margin-bottom: 22px;
}
.projects-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
}
.project-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}
.project-card img {
  width: 100%;
  height: clamp(160px, 30vw, 200px);
  object-fit: cover;
}
.project-info { padding: 16px; text-align: left; }
.project-info h3 { font-size: 1.15rem; margin-bottom: 6px; color: var(--text); }
.project-info p { font-size: 0.98rem; color: var(--muted); margin-bottom: 12px; }
.project-btn {
  display: inline-block;
  padding: 10px 14px;
  background: var(--primary);
  color: var(--white);
  text-decoration: none;
  border-radius: 8px;
}

/* ---------- About ---------- */
.about {
  max-width: 900px;
  margin: 52px auto;
  padding: 0 16px;
  text-align: center;
}
.about h2 { font-size: clamp(1.6rem, 4vw, 2rem); margin-bottom: 10px; color: #333; }
.about p { font-size: 1.02rem; color: var(--muted); }

/* ---------- Contact ---------- */
.contact-section {
  text-align: center;
  padding: 60px 5%;
  background: #f9f9f9;
}
.contact-section h2 { font-size: clamp(1.6rem, 4vw, 2rem); margin-bottom: 10px; }
.contact-section p { color: var(--muted); margin-bottom: 20px; }
.contact-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}
.contact-btn {
  text-decoration: none;
  padding: 12px 18px;
  background: var(--primary);
  color: var(--white);
  border-radius: 8px;
  font-weight: 600;
}

/* ---------- Footer ---------- */
footer {
  text-align: center;
  padding: 18px;
  background: var(--primary);
  color: #fff;
  font-size: 0.95rem;
  margin-top: 36px;
}