:root { 
    --hvac-blue: #0284c7; 
    --hvac-dark: #1e293b; 
    --hvac-orange: #f97316;
    --hvac-success: #16a34a; 
}

body { 
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; 
    background: #f8fafc; 
    padding: 20px; 
    color: var(--hvac-dark); 
}

.container { 
    max-width: 850px; 
    margin: auto; 
    background: white; 
    padding: 30px; 
    border-radius: 12px; 
    border-top: 6px solid var(--hvac-blue); 
    box-shadow: 0 4px 20px rgba(0,0,0,0.08); 
}

header { 
    text-align: center; 
    border-bottom: 2px solid #f1f5f9; 
    margin-bottom: 25px; 
    padding-bottom: 15px; 
}

.service-selector { 
    margin-bottom: 30px; 
    background: #f0f9ff; 
    padding: 20px; 
    border-radius: 8px; 
    border: 1px solid #bae6fd; 
}

select { 
    width: 100%; 
    padding: 12px; 
    border-radius: 6px; 
    border: 1px solid #cbd5e1; 
    font-size: 15px; 
    font-weight: 600;
    color: var(--hvac-dark);
    margin-top: 8px;
}

.question-card { 
    margin-bottom: 25px; 
    padding: 20px; 
    background: #ffffff;
    border: 1px solid #e2e8f0; 
    border-left: 5px solid var(--hvac-blue); 
    border-radius: 6px; 
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

label { 
    display: block; 
    font-weight: 700; 
    margin-bottom: 10px; 
    color: #334155;
    font-size: 15px;
}

textarea { 
    width: 100%; 
    height: 110px; 
    padding: 12px; 
    border: 1px solid #cbd5e1; 
    border-radius: 6px; 
    resize: vertical; 
    box-sizing: border-box; 
    font-family: inherit; 
    font-size: 14px; 
    line-height: 1.5;
}

textarea:focus {
    outline: none;
    border-color: var(--hvac-blue);
    box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
}

.checkbox-group { 
    display: grid; 
    grid-template-columns: 1fr 1fr; 
    gap: 12px; 
    background: #f8fafc;
    padding: 12px;
    border-radius: 6px;
    border: 1px solid #f1f5f9;
}

.checkbox-group span {
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.actions { 
    margin-top: 30px; 
    display: flex; 
    gap: 12px; 
    justify-content: center; 
    flex-wrap: wrap; 
}

button { 
    padding: 14px 24px; 
    border: none; 
    border-radius: 6px; 
    cursor: pointer; 
    font-weight: bold; 
    font-size: 14px;
    transition: all 0.2s ease; 
}

.btn-save { background: #64748b; color: white; }
.btn-submit { background: var(--hvac-blue); color: white; }
.btn-pdf { background: var(--hvac-dark); color: white; display: none; }

.btn-completed { 
    background-color: var(--hvac-success) !important; 
    border: 1px solid #15803d; 
}

button:hover { 
    opacity: 0.95; 
    transform: translateY(-1px); 
}