* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: Arial, Helvetica, sans-serif; color: #222; line-height: 1.6; background: #f7f7f9; }
.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }
a { color: #2456e6; text-decoration: none; }
a:hover { text-decoration: underline; }

.site-header { background: #fff; border-bottom: 1px solid #e5e5e5; }
.header-inner { display: flex; justify-content: space-between; align-items: center; padding: 16px 20px; }
.logo { font-weight: bold; font-size: 1.3rem; color: #111; }
.main-nav a { margin-left: 22px; color: #333; font-weight: 500; }
.main-nav a:hover { color: #2456e6; text-decoration: none; }

.page-content { padding: 40px 20px; min-height: 60vh; }

.hero { text-align: center; padding: 40px 0; }
.hero h1 { font-size: 2.2rem; margin-bottom: 10px; }

.project-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 24px; margin-top: 20px; }
.project-card { background: #fff; border: 1px solid #e5e5e5; border-radius: 8px; padding: 16px; }
.project-card img { width: 100%; height: 160px; object-fit: cover; border-radius: 6px; margin-bottom: 12px; background: #eee; }
.project-card h3 { margin-bottom: 8px; }

.project-detail-img { width: 100%; max-height: 420px; object-fit: cover; border-radius: 8px; margin: 16px 0; }

.btn, .btn-small { display: inline-block; background: #2456e6; color: #fff; padding: 10px 18px; border-radius: 6px; margin-top: 12px; border: none; cursor: pointer; }
.btn:hover, .btn-small:hover { background: #1a3fb8; text-decoration: none; color: #fff; }
.btn-small { padding: 6px 12px; font-size: 0.9rem; }

.form { max-width: 500px; display: flex; flex-direction: column; margin-top: 20px; }
.form label { margin-top: 14px; font-weight: bold; }
.form input, .form textarea { padding: 10px; border: 1px solid #ccc; border-radius: 6px; margin-top: 6px; font-family: inherit; }

.alert { padding: 12px 16px; border-radius: 6px; margin-bottom: 16px; }
.alert-success { background: #dcf7dc; color: #1a6b1a; }
.alert-error { background: #fbdada; color: #a12222; }

.site-footer { background: #fff; border-top: 1px solid #e5e5e5; padding: 20px 0; text-align: center; color: #777; margin-top: 40px; }

/* ---- Admin panel ---- */
.admin-body { background: #f1f2f6; }
.admin-header { background: #111827; color: #fff; padding: 14px 20px; display: flex; justify-content: space-between; align-items: center; }
.admin-header a { color: #fff; margin-left: 16px; }
.admin-wrap { max-width: 900px; margin: 30px auto; padding: 0 20px; }
.admin-card { background: #fff; border-radius: 8px; padding: 24px; box-shadow: 0 1px 3px rgba(0,0,0,0.08); margin-bottom: 24px; }
.admin-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: 8px; overflow: hidden; }
.admin-table th, .admin-table td { padding: 12px; border-bottom: 1px solid #eee; text-align: left; vertical-align: middle; }
.admin-table img { width: 70px; height: 50px; object-fit: cover; border-radius: 4px; }
.login-box { max-width: 380px; margin: 80px auto; background: #fff; padding: 30px; border-radius: 8px; box-shadow: 0 1px 3px rgba(0,0,0,0.1); }
.action-link-danger { color: #c0392b; }